US Patent Class 400-- TYPEWRITING MACHINES

US Patent Class 400
TYPEWRITING MACHINES

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Current as of: June, 1999
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	DF	CLASS NOTES
1	DF	INCLUDING JUSTIFICATION OR QUADDING OF PRINT-LINE
2	DF	.~ Including quadding of print-line
3	DF	.~ By programmed-control-system
4	DF	.~.~ On auxiliary-record-program (e.g., tape, card, etc.)
5	DF	.~.~.~ Magnetic record
6	DF	.~.~.~ With error-correcting storage register
7	DF	.~.~.~ Including artificial or end-of-line hyphen
8	DF	.~ By using "no-print" device
9	DF	.~ By interword or intercharacter spacing
10	DF	.~.~ Variable carriage-feed mechanism
11	DF	.~.~ Carriage slidable relative to its carriage-rack
12	DF	.~.~ By interword spacing only
13	DF	.~.~.~ Including plural space-bars for different spacings
14	DF	.~ By typing line on stretchable medium
15	DF	.~ Including justification indicator
16	DF	FOR TYPING OR FORMING CONTINUOUS OR DISCONTINUOUS LINE (E.G., BY "LINER")
17	DF	.~ Including programmed-control-system
18	DF	.~ By scriber (e.g., pen, pencil, etc.) or with scriber guide
19	DF	.~.~ For writing in script
20	DF	.~.~ Rotatable disc scriber
21	DF	.~ Responsive to carriage movement
22	DF	.~ Underscoring concurrently with character imprinting
23	DF	FOR TYPING ON FLAT RECORD-MEDIUM OR AGAINST FLAT PLATEN
24	DF	.~ For typing on a book
25	DF	.~.~ Including a type-head (e.g., cylinder, disc, etc.)
26	DF	.~.~ Against cylindrical backing
27	DF	.~.~ Including adjustment of typewriter relative to book (e.g., to compensate for book thickness)
28	DF	.~.~ Including adjustment of book support relative to typewriter (e.g., for top or bottom of book, etc.)
29	DF	.~ For typing on flat blueprint or drawing (e.g., "platenless" typewriter)
30	DF	.~ For typing on carton or package
31	DF	.~ By multidirectional movement of typewriter structure (e.g., "Elliot-Fisher" structure)
32	DF	.~ Bottom-strike typewriter including type-bar action or bar platen or anvil platen
33	DF	.~ Top-strike typewriter including pivoted type-bar
34	DF	.~ Including carriage-return mechanism
35	DF	.~ Including case-shift by shifting platen
36	DF	.~ Including ribbon-feed mechanism
37	DF	.~ For typing on manifold set (e.g., with type-die, etc.)
38	DF	.~.~ Including feeding of wide carbon paper transverse to feed of record-medium
39	DF	.~.~ Including spool for roll of carbon paper
40	DF	.~.~ Including clamp or guide for carbon paper
41	DF	.~.~ Including adjustment of platen perpendicular to its surface
42	DF	.~.~ Including aligning and feeding manifold set
43	DF	.~ Including feed of tally strip
44	DF	.~ Including line-spacing mechanism
45	DF	.~.~ Platen shifted for line-spacing
46	DF	.~.~ Including adjustment of line-space distance or increment
47	DF	.~.~ Including disengagement of line-spacing mechanism
48	DF	.~ Work support (e.g, sheet or card holddown or guide, sheet-size platen, etc.)
49	DF	.~ Collating-table attachment
50	DF	INCLUDING DELAY MEANS FOR PREVENTING MALFUNCTION IN POWERED TYPEWRITER
51	DF	.~ Delay of sequential character rate in programmed-control typewriter
52	DF	.~ Delay by storage of next character to be imprinted
53	DF	INCLUDING ADJUSTMENT MEANS TO COMPENSATE FOR WEAR
54	DF	SAFETY SWITCH OR CONDITION-RESPONSIVE-CUTOFF SWITCH FOR ELECTRICALLY POWERED TYPEWRITER
55	DF	INCLUDING ADJUSTMENT FOR OPTIMUM PRINTING PLANE
56	DF	.~ Responsive to thickness of record-medium
57	DF	.~ In accordance with the number of sheets of record-medium
58	DF	.~ By adjustment of platen relative to carriage
59	DF	.~ By adjustment of carriage (e.g, carriage-guide rollers)
60	DF	.~.~ Via adjustment of case-shift linkage
61	DF	INCLUDING CONTROL OF FORMAT AND SELECTION OF TYPE-FACE BY PROGRAMMED CONTROL-SYSTEM (E.G., INPUT TYPEWRITER)
62	DF	.~ Including means for responding to input program or incoming signals and providing output program or signals representing typing operations (e.g., output typewriter)
63	DF	.~ Including editing or revision system
64	DF	.~ Including right-hand margin control system
65	DF	.~ Including typing of graphical representations
66	DF	.~ Including baseplate attachment with electromagnets for input or output operations
67	DF	.~ Separate interrelated programs
68	DF	.~.~ Including message writing (e.g, address program, form-letter program, etc.)
69	DF	.~ Type-face selection via magnetic program tape
70	DF	INCLUDING SELECTION OF TYPE-FACE BY PROGRAMMED-CONTROL-SYSTEM OR BY REMOTE CONTROL
71	DF	.~ Plural typewriters coupled for simultaneous operation (e.g., "master-slave" relationship)
72	DF	.~ Including character-selection latches (e.g., for type-face selection)
73	DF	.~ Including particular reader structure and operation
74	DF	.~ Including error detection
75	DF	.~ Including type-bar selection using mechanical program
76	DF	INCLUDING CONTROL OF FORMAT BY PROGRAMMED-CONTROL-SYSTEM
77	DF	TYPEWRITER CONTROLS OTHER INFORMATION RECORDER
78	DF	.~ Typewriter controls apparatus used for accounting function
79	DF	.~.~ And a tape-punch or card-punch apparatus
80	DF	.~ Typewriter (e.g, output typewriter) controls tape-punch or card-punch apparatus
81	DF	.~.~ And imprints the character represented by the punched code on the tape or card
82	DF	INCLUDING PLURAL, INDEPENDENTLY SUPPORTED KEY-BOARDS, PLATENS, OR TYPE-SET ASSEMBLAGES
83	DF	DISPLAYING TYPEWRITER-FORMED REPRESENTATION OF PRINT-LINE
84	DF	.~ By projecting typed image on screen
85	DF	.~.~ Including transparent or transluscent record-medium
86	DF	OPERATING BY SOUND
87	DF	FOR OPERATION BY HANDICAPPED USER
88	DF	POCKET TYPEWRITER
89	DF	KEY REASSIGNMENT
90	DF	.~ Electrically powered
91	DF	STENOGRAPHIC TYPEWRITER
92	DF	.~ Using common-letter type-face
93	DF	.~.~ Including plural type-faces mounted on carrier and movable for selection of type-face
94	DF	.~ Electrically powered
95	DF	LOGOTYPE TYPEWRITER (E.G., WORD TYPING)
96	DF	.~ Including date-stamp type-face
97	DF	.~ Including signature type-face
98	DF	.~ Actuation of single key types plural characters
99	DF	.~.~ Characters typed simultaneously
100	DF	PLURAL-KEY-ACTUATED TYPEWRITER (E.G., PERMUTATIVE KEY-BOARD)
101	DF	.~ Having type-faces disposed on pivotable type-bars
102	DF	.~ Having type-faces disposed on rotatable type-head
103	DF	CODE-PRINTING TYPEWRITER (E.G., FOR PRINTING A PATTERN OR MARK)
104	DF	.~ For typing and encoding
105	DF	.~.~ Including magnetic encoding
106	DF	.~ Including coded ink (e.g., phosphorescent or color-coded ink, etc.)
107	DF	.~ For coding by conductive mark
108	DF	.~ For marking laundry
109	DF	FOREIGN LANGUAGE OR BRAILLE TYPEWRITER
109.1	DF	.~ Braille
110	DF	.~ Including Oriental lanugage
111	DF	.~ Including Semitic language
112	DF	ANNULAR TYPEWRITER (E.G., FOR TYPING AROUND CIRCUMFERENCE OF PLATEN)
113	DF	.~ Including vertically disposed platen
114	DF	.~ Platen axis horizontal and extending front-to-rear
115	DF	.~ Powered Actuated
116	DF	MUSIC-ROLL OR MUSICAL-NOTATION TYPEWRITER
117	DF	.~ Musical-notation typewriter
118.1	DF	TYPING BY HEATED DIE
118.2	DF	TYPING BY OTHER THAN TYPE-FACE OR TYPE-DIE
118.3	DF	.~ Electroconductive transfer
120.01	DF	.~ Thermal
120.02	DF	.~.~ Multicolor
120.03	DF	.~.~.~ Having multilayered colored transfer material
120.04	DF	.~.~.~ Having single layer colored transfer material
120.05	DF	.~.~ Block driving
120.06	DF	.~.~.~ Sequentially
120.07	DF	.~.~ Gradational recording
120.08	DF	.~.~ Preheating
120.09	DF	.~.~ Density control
120.1	DF	.~.~.~ By number of heated recording elements
120.11	DF	.~.~.~ In accordance with output characteristic of recording elements
120.12	DF	.~.~.~ By voltage regulation
120.13	DF	.~.~.~ By transfer material or record receiver
120.14	DF	.~.~.~ In accordance with temperature of the recording means
120.15	DF	.~.~.~ By history of recording elements
120.16	DF	.~.~ Recording means support or actuator
120.17	DF	.~.~.~ Adjustable
120.18	DF	.~.~ Pre- or post-image recording treatment
124.01	DF	.~ Character formation by impact (e.g., wire matrix)
124.02	DF	.~.~ With signal conditioning
124.03	DF	.~.~.~ Overheat protection
124.04	DF	.~.~.~ Responsive to impact member position
124.05	DF	.~.~.~ Control of drive force
124.06	DF	.~.~.~.~ Manifold form or plural copies
124.07	DF	.~.~.~ With wear or defect compensation
124.08	DF	.~.~ Plural printheads
124.09	DF	.~.~.~ Multicolor
124.1	DF	.~.~ With inking
124.11	DF	.~.~ Printhead
124.12	DF	.~.~.~ Having assembly means
124.13	DF	.~.~.~ Overheat protection
124.14	DF	.~.~.~ With actuator
124.15	DF	.~.~.~.~ Single actuator for simultaneous actuation of plural impact members
124.16	DF	.~.~.~.~ Electrostrictive, magnetostrictive, or piezoelectric
124.17	DF	.~.~.~.~ Actuator having electromagnet
124.18	DF	.~.~.~.~.~ Electrical component
124.19	DF	.~.~.~.~.~.~ Moving coil
124.2	DF	.~.~.~.~.~.~ Permanent magnet
124.21	DF	.~.~.~.~.~ With biasing means
124.22	DF	.~.~.~.~.~.~ Backstop
124.23	DF	.~.~.~.~.~ Armature structure or mounting
124.24	DF	.~.~.~ Impact member guide
124.25	DF	.~.~.~.~ With lubricator
124.26	DF	.~.~.~.~ Specific material
124.27	DF	.~.~.~.~ Including shifting of guide
124.28	DF	.~.~.~ Impact member tip arrangement
124.29	DF	.~.~.~ Impact member structure
124.3	DF	.~.~.~.~ Tip cross-section
124.31	DF	.~.~.~.~ With attachment or engagement means
124.32	DF	.~.~.~.~ Specific material
127	DF	TYPING TO PRODUCE EMBOSSED CHARACTER
128	DF	.~ Character embossed or typed on nonplanar article (e.g., golf ball, toothbrush, etc.)
129	DF	.~ By type-die mounted on carrier movable for selection of character
130	DF	.~.~ Including programmed-control-system
131	DF	.~.~ Electrically powered
132	DF	.~.~ Type-die reciprocable on carrier
133	DF	.~.~ On endless-band carrier
134	DF	.~.~ On rotatable carrier
134.1	DF	.~.~.~ Actuated by key-board control
134.2	DF	.~.~.~.~ Including type-die movable relative to carrier
134.3	DF	.~.~.~.~.~ With magazine for supply of record-medium plates
134.4	DF	.~.~.~ On manually held embosser
134.5	DF	.~.~.~.~ Including web supply of record-medium
134.6	DF	.~.~.~ Including web supply of record-medium
135	DF	TYPING TO PRODUCE PIERCED CHARACTER
136	DF	.~ Cutout character for stencil
137	DF	.~ Check-protection character
138	DF	.~.~ By type-die mounted on carrier movable for selection of character
138.1	DF	.~.~.~ Electrically powered
138.2	DF	.~.~.~ On rotatable carrier (e.g., for scarifying elements, etc.)
138.3	DF	.~.~.~.~ Actuated by key-board control
138.4	DF	.~.~.~.~ Including plural-character type-die
138.5	DF	.~.~.~.~.~ And rotating contact with platen
138.6	DF	.~.~.~.~ For type-die including piercing or cutting elements
139	DF	INCLUDING TYPE-SET-ASSEMBLAGE MOUNTED ON CARRIER AND RELATIVELY MOVABLE FOR SELECTION AND FOR IMPACT OF TYPE-FACE
140	DF	.~ Including type-faces movable relative to type-face-carrier
141	DF	.~.~ Slidable type-faces mounted on reciprocable carrier
141.1	DF	.~.~.~ On rotatable or oscillatable carrier reciprocable along its axis
142	DF	.~.~ Slidable type-faces on rotatable carrier
143	DF	.~.~ Rotatable type-face carrier including type-faces on pivotable arms
144	DF	.~.~ Type-face-carrier including type-faces on flexible arms
144.1	DF	.~.~.~ Rotatable or oscillatable carrier
144.2	DF	.~.~.~.~ Carrier having coplanar flexible arms (e.g., "daisy" wheel, etc.)
144.3	DF	.~.~.~.~.~ Continuously rotated carrier
144.4	DF	.~.~.~.~.~ Manually rotated carrier
145	DF	.~.~ Type-faces on deformable type-face-carrier
145.1	DF	.~.~.~ Rotatable carrier
145.2	DF	.~.~.~.~ Cylindrical carrier
146	DF	.~ Including endless-band carrier for type-faces
147	DF	.~ Type-faces arranged in rectilinear row and selected by reciprocable movement
148	DF	.~.~ On rotatable carrier having plural rectilinear rows
149	DF	.~ Plural type-heads mounted for selective individual type-head-imprinting movement
150	DF	.~.~ Type-heads arranged for selective individual imprinting movement away from coaxial rest position
151	DF	.~.~ Turret carrier for type-heads
151.1	DF	.~.~.~ Axis of turret carrier parallel to platen axis
152	DF	.~ Type drum having multiple type-set-assemblages
153	DF	.~ Imprint by movement of record-medium against type-face
154	DF	.~.~ By hammer impacting record-medium against type-face on type-head (e.g., type shuttle, etc.)
154.1	DF	.~.~.~ Including selection of type-face
154.2	DF	.~.~.~.~ Via pulley and cord arrangement (e.g., summing displacements)
154.3	DF	.~.~.~.~ By shortest peripheral path
154.4	DF	.~.~.~.~ Via coded disc in electric or magnetic circuit (e.g, photoelectric)
154.5	DF	.~.~.~.~ Via stepping motor responsive to selection
155	DF	.~.~.~.~ Via electrical or electromagnetic means
155.1	DF	.~.~.~.~.~ Including plural-function actuation by electromagnet(s)
156	DF	.~.~.~.~ Via helical arrangement of projections
156.1	DF	.~.~.~.~ Via mechanically permutated bar(s), disc(s), or plate(s)
156.2	DF	.~.~.~.~ Via planetary gear arrangement
156.3	DF	.~.~.~.~.~ Including latch means
157	DF	.~.~.~ Including type-faces arranged along helical path(s)
157.1	DF	.~.~.~ Including particular structure of hammer(s)
157.2	DF	.~.~.~.~ Electromagnetically actuated
157.3	DF	.~.~.~.~ For variable impression (e.g., impact control)
157.4	DF	.~.~.~.~ Hammer(s) mounted on endless belt or in helical array
158	DF	.~.~ Including platen for moving record-medium against type-face and mechanism for feeding record-medium
158.1	DF	.~.~.~ Including moving and feeding by platen
159	DF	.~.~ Including platen for moving record-medium against type-face and mechanism for inking type-face
160	DF	.~ Imprint by pivoting of type-head-carrier and type-head against record-medium
161	DF	.~.~ Type-head-carrier movable on movable carriage
161.1	DF	.~.~.~ Including selection of type-face (e.g., on "golf ball" type-head)
161.2	DF	.~.~.~.~ Via gear train
161.3	DF	.~.~.~.~.~ Gears mounted on type-head and type-head-carrier
161.4	DF	.~.~.~.~.~ Including gear (e.g., rack) reciprocated by transmission mechanism
161.5	DF	.~.~.~.~ Via multiple cam surfaces
162	DF	.~.~ Type-head movable for selection of type-face
162.1	DF	.~.~.~ Via pulley and cord arrangement
162.2	DF	.~.~.~ Via shortest peripheral path
162.3	DF	.~.~.~ Via coded disc in electric or magnetic circuit (e.g., photoelectric)
163	DF	.~.~.~ Via stepping motor responsive to selection
163.1	DF	.~.~.~ Via electrical or electromagnetic means
163.2	DF	.~.~.~.~ Including electromagnetically actuated type-head movement toward record-medium
163.3	DF	.~.~.~.~ Including plural-function actuation by electromagnet(s)
164	DF	.~.~.~ Via helical arrangement of projections
164.1	DF	.~.~.~ Via pneumatic actuation
164.2	DF	.~.~.~ Via setting elements actuating selector-command member(s)
164.3	DF	.~.~.~ Control arm connected to selection gear and movable to engage key-lever actuated abutment
164.4	DF	.~.~.~ Via stop pins actuatable by key-board
164.5	DF	.~.~.~ Toothed member connected to selection gear and slidable by key-lever movement
164.6	DF	.~.~.~ Selection gear rotated by key-lever movement
165	DF	.~.~.~ Simultaneous rotation and translation of type-head by manually powered actuation (e.g., helical shift)
165.1	DF	.~.~.~ Via manually powered actuation other than by key-board (e.g, stylus selection)
165.2	DF	.~.~.~.~ Including type-head movable to print-point by actuator common to all type faces
165.3	DF	.~.~.~.~.~ Selection by rotatable dial
166	DF	.~.~ Including impact control
167	DF	.~.~ Including rebound control
168	DF	.~.~ Articulated-support joint
169	DF	.~.~ Detenting to fix type-head for imprinting
170	DF	.~.~ Including movable printing anvil within type-head
171	DF	.~ Plural type-set-assemblages selectively movable from a storage station to a printing station
172	DF	.~ Type-faces mounted on type chips and removable from storage for printing
173	DF	.~ With means for exposing last-typed character
174	DF	.~ Type-head, per se
175	DF	.~.~ Detachable from carrier (e.g., interchangeable)
176	DF	HAVING FLUID-PRESSURE POWER DRIVE
177	DF	.~ Including pneumatic decoder for perforated tape
178	DF	.~ For producing typewriter-control tape (e.g., perforated tape, etc.)
179	DF	.~ For type-face selection or choice
180	DF	.~.~ Including key-board driven by external pneumatic source
181	DF	.~.~ By pneumatic actuation of type-face or type-bar
182	DF	.~ For movement of carriage or platen
183	DF	.~.~ Including line-spacing
184	DF	HAVING TYPEWRITER-CONTROLLED RECIPROCABLE ELECTROMAGNETIC DRIVE FOR PLURAL FUNCTIONS IN SAME TYPEWRITER
185	DF	HAVING POWER-DRIVEN OPERATOR FOR PLURAL FUNCTIONS
186	DF	.~ Via continuously rotated power roll selectively connected to operate
187	DF	.~ Usable selectively (e.g., for powered or manual operation, alternative usable functions, etc.)
188	DF	FOR TYPING ON REVERSE SURFACE OF RECORD-MEDIUM
189	DF	.~ By simultaneous use of both surfaces of same ribbon
190	DF	.~ By use of "carbon paper"
191	DF	INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM
192	DF	.~ Moved by continuously rotating power drive intermittently applied
193	DF	.~ Inking device handheld during typing
194	DF	.~ Endless ribbon or cartridge therefor
195	DF	.~.~ Mobius strip
196	DF	.~.~ Including storage (e.g., in cartridge, etc.) of ribbon
196.1	DF	.~.~.~ Having ribbon stored in pleated form
197	DF	.~ Renovation of used ribbon
198	DF	.~.~ With ink heater (e.g., for melting solid ink)
199	DF	.~.~ By discrete auxiliary band movable with ribbon
200	DF	.~.~ Selectively actuatable re-inker
201	DF	.~.~ Of multicolor ribbon
202	DF	.~.~ Renovator attachable to typewriter for replenishing ribbon ink
202.1	DF	.~.~.~ Attached to ribbon spool
202.2	DF	.~.~.~ And includes refillable chamber (e.g., reservoir) for liquid ink
202.3	DF	.~.~.~.~ And conveyor of discrete drops of ink
202.4	DF	.~.~.~.~ And re-inking roller
203	DF	.~ Ribbon disposed within platen
204	DF	.~ For typing plural copies simultaneously with ribbon(s) (e.g., duplicate typing)
205	DF	.~.~ Including holder for short length of ribbon
205.1	DF	.~.~.~ Holder movable to inoperative position on typewriter
206	DF	.~.~ Using plural ribbons (e.g., additional ribbon(s)
206.1	DF	.~.~.~ Including "carbon paper" ribbon
206.2	DF	.~.~.~ And ribbon holder movable to inoperative position on typewriter
206.3	DF	.~.~.~ On plural coaxial spools
206.4	DF	.~.~.~ On single spool
207	DF	.~ Package for ribbon facilitating mounting of ribbon on typewriter (e.g., ribbon cartridge)
208	DF	.~.~ Package attached to typewriter
208.1	DF	.~.~.~ And includes separable assemblage of spools
209	DF	.~ For bottom-strike typewriter
210	DF	.~ For boldface typing
211	DF	.~ Including mechanism for shifting ribbon laterally at print-point
212	DF	.~.~ Via electrically powered actuator
213	DF	.~.~ For impact of successive type-faces on one field of ribbon in path not parallel to longitudinal extent of ribbon (e.g., "zigzag", oblique, etc.)
213.1	DF	.~.~.~ Via ribbon vibrator
214	DF	.~.~ Plural ribbons shiftable laterally (e.g., by duplicate vibrators)
215	DF	.~.~ By ribbon vibrator
215.1	DF	.~.~.~ Including vibrator shiftable during use of nonfeed character key (e.g., for typing accent mark, etc.)
215.2	DF	.~.~.~ With retardation of vibrator return after type-face impact (e.g., with dashpot)
215.3	DF	.~.~.~ With elevation and holding of vibrator above print-point (e.g., to facilitate ribbon insertion)
215.4	DF	.~.~.~ With inactivation of vibrator (e.g., for cutting a stencil)
216	DF	.~.~.~ Including variable throw of vibrator
216.1	DF	.~.~.~.~ For diverse-field (e.g., plural-color) ribbon
216.2	DF	.~.~.~.~.~ With typewriter-controlled change of field
216.3	DF	.~.~.~.~.~ By movement parallel to print-line
216.4	DF	.~.~.~.~.~ Vibrator throw controlled via alternate pins selectively inserted in slots
216.5	DF	.~.~.~.~.~ Field selection by selectively positioned stop faces to limit vibrator movement
216.6	DF	.~.~.~.~.~ To compensate for case-shift
217	DF	.~.~ To shift impact path (e.g., during ribbon reversal)
217.1	DF	.~.~.~ By adjustable ribbon guide spaced from supply spool
218	DF	.~ Ribbon-reversing mechanism
219	DF	.~.~ Including means responsive to depletion of ribbon supply
219.1	DF	.~.~.~ Including an electric switch
219.2	DF	.~.~.~ Including lever retained in spool by wound ribbon
219.3	DF	.~.~.~ Including senser for diameter of wound ribbon
219.4	DF	.~.~.~.~ Senser received in depression in core of spool
219.5	DF	.~.~.~ Including projection from ribbon
220	DF	.~.~ Alternative pawl-and-ratchet drive including ratchet directly connected to spool or spindle
220.1	DF	.~.~.~ Including a common pawl member (e.g.. double-toothed pawl)
220.2	DF	.~.~.~ Including member interposed in pawl drive path
221	DF	.~.~ Alternative gear drive including gear directly connected to spool or spindle
221.1	DF	.~.~.~ And gears mounted on ends of axially shiftable common shaft
221.2	DF	.~.~.~ And gears mounted on ends of pivoted common shaft
222	DF	.~.~ Alternative clutch drive including clutch member directly connected to spool or spindle
223	DF	.~ Ribbon-feeding mechanism
224	DF	.~.~ For feeding ribbon angularly to print-line at print-point
224.1	DF	.~.~.~ Ribbon fed perpendicular to print-line at print-point
224.2	DF	.~.~.~.~ Ribbon is full-page wide
225	DF	.~.~ Including electrically powered drive means (e.g., solenoid, stepping motor, etc.)
226	DF	.~.~ For feeding ribbon partial character-space before impact and partial character-space after impact
227	DF	.~.~ For narrow carbon ribbon (e.g., carbon ink, "single use", etc.)
227.1	DF	.~.~.~ Ribbon destroyed after use
227.2	DF	.~.~.~ Or for alternatively used fabric ribbon
228	DF	.~.~ Including pin-feed-engaging ribbon
229	DF	.~.~ Mounted with movable type-face-carrier or type-head-carrier
230	DF	.~.~ With fast rewind of ribbon
231	DF	.~.~ With prevention of ribbon feed (e.g., for nontype operation, etc.)
232	DF	.~.~ Including feed at particular feed rate (e.g., "creep" feed)
233	DF	.~.~ Ribbon feed from supply only during carriage return
234	DF	.~.~ Including ribbon tensioner
235	DF	.~.~ Drive applied by means directly engaging ribbon in advance of takeup
235.1	DF	.~.~.~ Drive applied by pinch-roller couple
236	DF	.~.~ Drive applied directly to spool or spool spindle
236.1	DF	.~.~.~ By a pawl driving a ratchet on the spool or spindle
236.2	DF	.~.~.~ By a gear driving a gear on the spool or spindle
237	DF	.~ Ribbon, per se
238	DF	.~.~ Having leader portion (e.g., for threading, etc.)
239	DF	.~.~ With ribbon-reversing indicator or device on ribbon
240	DF	.~.~ Including differently pigmented fields
240.1	DF	.~.~.~ Including correction-material field
240.2	DF	.~.~.~ With prevention of bleeding between adjacent fields
240.3	DF	.~.~.~ Including fields arranged transversely to elongated dimension of ribbon
240.4	DF	.~.~.~ Including more than two fields
241	DF	.~.~ Particular ribbon material
241.1	DF	.~.~.~ Synthetic material
241.2	DF	.~.~.~.~ Wherein ink is entrapped in ribbon material (e.g., microcapsules, micropores, etc.)
241.3	DF	.~.~.~ Particular weave pattern
241.4	DF	.~.~.~ Including ink-impervious backing for ribbon
242	DF	.~ Ribbon spool or mount therefor
243	DF	.~.~ Universally adaptable
244	DF	.~.~ Including ribbon-reversing indicator or device on spool or mount
245	DF	.~.~ Including magnetic retainer
246	DF	.~.~ Spool for full-page-wide ribbon
247	DF	.~ Means auxiliary to ribbon mechanism (e.g., shield, guide, etc.)
248	DF	.~.~ Including guide for ribbon
248.1	DF	.~.~.~ Ribbon guide opening expandable to facilitate ribbon insertion
248.2	DF	.~.~.~.~ And typewriter-actuated closing of guide
248.3	DF	.~.~.~ Including electrical, magnetic, or pneumatic guide means
249	DF	.~.~ Including indicator for depletion of ribbon (e.g., bell, sign, etc.)
250	DF	.~.~ Including tool for inserting ribbon
251	DF	CASE-SHIFT MECHANISM
252	DF	.~ Including programmed-control-system
253	DF	.~ Including electronic control or code-bar control
254	DF	.~ Controlled by typewriter-actuated mechanism
255	DF	.~ Including plural case-shift mechanisms (e.g., for simultaneous or selective use)
256	DF	.~ Actuated by toggle-linkage
257	DF	.~ For case-shift by type-head (e.g., spherical type-head) movement
258	DF	.~ Power-operated mechanism (e.g., for locking shift key)
259	DF	.~.~ For shifting platen
260	DF	.~.~ For shifting type-bar-segment
261	DF	.~ Multiple-shift mechanism (i.e., for type-bar having three or more type faces thereon)
262	DF	.~.~ For shifting type-bar-segment
263	DF	.~.~ For shifting type-bar or type-face on type-bar
263.1	DF	.~.~.~ By pivoting type-face relative to type-bar
263.2	DF	.~.~.~ By rotating type-face relative to type-bar
264	DF	.~ For shifting platen
265	DF	.~.~ Fore-and-aft (e.g., for top-strike or bottom-strike typewriter)
266	DF	.~.~ Mounted on pivotally movable platen carrier
266.1	DF	.~.~.~ With movement of platen out of typing position
266.2	DF	.~.~.~ Including adjustable counterbalance spring
266.3	DF	.~.~.~ Including a yieldable link (e.g., spring, etc.)
267	DF	.~.~ By depression of space-bar
268	DF	.~ For shifting type-face or type-bar
269	DF	.~.~ By shifting type-bar or type-face on type-bar
269.1	DF	.~.~.~ By pivoting type-face relative to type-bar
270	DF	.~.~ Mounted on type-bar support (e.g., guide pin, type-bar-segment, etc.)
270.1	DF	.~.~.~ Ring hanger support
270.2	DF	.~.~.~ Including ball-bearing support
270.3	DF	.~.~.~ Including pivoted-lever support (e.g., cantilever spring, etc.)
271	DF	.~ By choosing from one of a plurality of type-bars operated by a single key
272	DF	.~ Including key attachment for case-shift
273	DF	.~.~ Operated by user's leg, (e.g., foot, knee, etc.)
274	DF	.~ For locking case-shift mechanism in position (e.g., rebound lock, cam, etc.)
275	DF	.~.~ For locking platen in fore-and-aft position (e.g., by overcenter spring, etc.)
276	DF	.~.~ For locking shift-key lever in depressed position
276.1	DF	.~.~.~ By toggle-linkage
276.2	DF	.~.~.~ By means pivoted on shift-key lever
277	DF	.~ Including limit stop (e.g., block, chain, etc.)
278	DF	.~.~ Including limit screw
279	DF	CONTROL OF PRINT POSITION ALONG PRINT-LINE BY SIGNAL GENERATED BY PROGRAMMED-CONTROL-SYSTEM
280	DF	.~ Program is indicia on auxiliary member
281	DF	.~.~ Member is punched tape or card
282	DF	.~ Program is indicia on record-medium
283	DF	CARRIAGE OR CARRIAGE-MOVING OR MOVEMENT-REGULATING MECHANISM
284	DF	.~ For stopping carriage in tabular position (e.g., column-set positions)
285	DF	.~.~ In denominational positions
285.1	DF	.~.~.~ And column-set positions
285.2	DF	.~.~.~.~ Tab-rack stop intercepted by denominational-stop
285.3	DF	.~.~.~.~.~ Tab stops grouped in stepped fashion
285.4	DF	.~.~.~ With control of zero or space for decimal point
285.5	DF	.~.~.~ With reverse-direction movement of carriage
285.6	DF	.~.~.~ Helically mounted denominational-stop(s)
286	DF	.~.~.~ Shiftable denominational-stop(s)
286.1	DF	.~.~.~.~ Step-shaped denominational- or tab-stop(s)
286.2	DF	.~.~.~.~ Engaging movable tab-rack means
286.3	DF	.~.~.~ With latch or lock means
287	DF	.~.~ Column set by control of mutilated carriage-rack
288	DF	.~.~ Column set by control of tab-rack
289	DF	.~.~ Column set by control of tap-stops or column-stops or counter-stops
289.1	DF	.~.~.~ Tab-stops grouped in stepped fashion
290	DF	.~.~ Forward or reverse tabulation
291	DF	.~.~ With impact cushion or rebound check
292	DF	.~.~ With control of carriage velocity
293	DF	.~.~ By multiple-pitch tab-racks or multilated gear
294	DF	.~.~ Stop-setting or stop-clearing mechanism
294.1	DF	.~.~.~ With stop magazine (i.e., for supply of stops)
294.2	DF	.~.~.~ With key-locking mechanism
294.3	DF	.~.~.~ Drum-mounted tab-stops
295	DF	.~.~.~ Stop setting by linear shift of tab-stop or counter-stop
295.1	DF	.~.~.~.~ Stop shifts horizontally from tab-rack
295.2	DF	.~.~.~.~ Stop shifts laterally along tab-rack
296	DF	.~.~.~ Stop setting by movement of tab-rack
296.1	DF	.~.~.~.~ Tab-rack rotates about its axis
296.2	DF	.~.~.~.~ Plural tab-racks
297	DF	.~.~.~ Stop setting by partial rotation of tab stop relative to tab-rack
297.1	DF	.~.~.~ Stop setting by pivoting pawllike stop
298	DF	.~.~ Tab-stop or tab-rack structure, per se
299	DF	.~ With rotatable type wheel for repeat printing in response to carriage movement
300	DF	.~ Key-actuated mechanism for nonfeed of carriage (e.g., "silent" key, locking carriage, etc.)
301	DF	.~.~ By disabling carriage-escapement mechanism
302	DF	.~.~ By key actuated independently of carriage feed
303	DF	.~ For varying carriage feed
304	DF	.~.~ For kerning or overlap imprinting
305	DF	.~.~ By force-feed or screw-feed mechanism
306	DF	.~.~ Proportional to variable widths of imprinted characters
306.1	DF	.~.~.~ By settable elements (e.g., pins, bars, slides)
306.2	DF	.~.~.~ By ratchet-wheel and controlled pawl
306.3	DF	.~.~.~.~ Including multiple pawls
306.4	DF	.~.~.~.~.~ And multiple wheels
307	DF	.~.~.~ By ratchet rack and controlled pawl
307.1	DF	.~.~.~.~ Including multiple pawls
307.2	DF	.~.~.~ By cooperating toothed members (e.g., gear, segment, rack, etc.)
308	DF	.~ Carriage backspace mechanism
309	DF	.~.~ Backspace proportional to variable width of imprinted characters
310	DF	.~.~ Including powered drive means
311	DF	.~.~ Including pawl and escapement wheel
312	DF	.~.~ Including pawl and escapement rack
313	DF	.~ Carriage-return mechanism
314	DF	.~.~ With concurrent line-spacing
314.1	DF	.~.~.~ Using electromagnetic drive
314.2	DF	.~.~.~ For selected number of line-spaces
314.3	DF	.~.~.~ With disconnection of return by margin-stop
314.4	DF	.~.~.~ Initiated by user's leg or foot
314.5	DF	.~.~.~ Initiated by actuator adjacent key-board
314.6	DF	.~.~.~ By return-clutch means
315	DF	.~.~ Responsive to carriage position
316	DF	.~.~ Partial return (e.g., for start of paragraph, etc.)
317	DF	.~.~ Including power drive (e.g., electric, spring, etc.)
317.1	DF	.~.~.~ For bidirectional drive
317.2	DF	.~.~.~ By spring-driven motor
317.3	DF	.~.~.~ Powered via engagement of a clutch
318	DF	.~.~ Initiated by actuator adjacent key-board
319	DF	.~ Carriage-feed mechanism (e.g., escapement, etc.)
320	DF	.~.~ For carriage on which a type-head-carrier is mounted
320.1	DF	.~.~.~ With concurrent movement of carriage for record-medium and carriage for type-head-carrier
321	DF	.~.~ With repeat spacing
322	DF	.~.~ By electric or magnetic power
323	DF	.~.~ Carriage-feed in two directions (e.g., continuous typing in both directions)
323.1	DF	.~.~.~ In selected direction (e.g., for Semitic language, etc.)
324	DF	.~.~ Word-space concurrent with typing of last character of word
325	DF	.~.~ By space-bar mechanism (e.g., separate connection to escapement) or paragraph-indentation key
326	DF	.~.~ With compensator for tilt of typewriter
327	DF	.~.~ For diagonal print-line
328	DF	.~.~ By force-feed or screw mechanism (e.g., direct drive, screw-biasing carriage, etc.)
328.1	DF	.~.~.~ Including pawl and toothed rack
329	DF	.~.~ Carriage escapement controlled by pawl
329.1	DF	.~.~.~ Means to ensure engagement of pawl at start of print-line (i.e., overbanking control)
329.2	DF	.~.~.~ Carriage-feed initiated and completed during depression of character key (e.g., "speed" or "reverse" escapement)
329.3	DF	.~.~.~ Pawl rocker spring regulating device
330	DF	.~.~.~ Via ratchet wheel connected to pinion and carriage-rack
330.1	DF	.~.~.~.~ And plural pawls
330.2	DF	.~.~.~.~.~ For half-drop escapement
330.3	DF	.~.~.~.~.~ Mounted on pivotable pawl carrier or rocker
330.4	DF	.~.~.~.~.~.~ Including pawl(s) fixed to rocker
330.5	DF	.~.~.~.~.~.~.~ And slidable pawl
330.6	DF	.~.~.~.~.~.~.~ Including pawl pivoted about axis parallel to rocker axis
330.7	DF	.~.~.~.~.~ Mounted on movable (e.g., rotatable, slidable) pawl carrier
330.8	DF	.~.~.~.~.~ Including particular structure of pawl (e.g., pivoted, unitary, with roller, etc.)
331	DF	.~.~.~.~ Including plural ratchet wheels
331.1	DF	.~.~.~.~ Including particular structure of ratchet wheel
331.2	DF	.~.~.~.~ Including cushioned escapement support (e.g., rocker, pawl buffer, etc.)
331.3	DF	.~.~.~.~ Including particular structure of mount for ratchet wheel (e.g., bearing, clutch, etc.)
332	DF	.~.~.~ Via toothed rack
332.1	DF	.~.~.~.~ And plural pawls
332.2	DF	.~.~.~.~.~ Mounted on pivotable pawl carrier or rocker
332.3	DF	.~.~.~.~.~ Mounted on movable (e.g., rotatable, slidable) pawl carrier
332.4	DF	.~.~.~.~.~ Including particular structure of pawl (e.g., slidable, pivoted, unitary, etc.)
332.5	DF	.~.~.~.~ Including plural toothed racks (e.g., pivoted, etc.)
332.6	DF	.~.~.~.~ Including particular structure of rack (e.g., toothed, slidable, etc.)
333	DF	.~.~ Universal-bar or actuator therefor
333.1	DF	.~.~.~ Connected to actuator for another function
333.2	DF	.~.~.~ Adjustable
333.3	DF	.~.~.~ Actuated by type-bar or type-bar action
334	DF	.~.~ Carriage-feed-release mechanism
334.1	DF	.~.~.~ By disengagement of clutch between ratchet wheel and pinion
334.2	DF	.~.~.~ By disengagement of escapement pawl(s)
334.3	DF	.~.~.~.~ From carriage-rack
335	DF	.~.~ With particular connection to carriage (e.g., gear train, pulley and strap, etc.)
336	DF	.~.~ Spring-biasing carriage for feed
336.1	DF	.~.~.~ Torsion spring in rotatable barrel
337	DF	.~ Carriage-retarder mechanism
338	DF	.~.~ Including governor responsive to speed or momentum
338.1	DF	.~.~.~ Using centrifugal force
338.2	DF	.~.~.~ Using inertial force retarder (e.g., flywheel, weight, etc.)
339	DF	.~.~ Using fluid or fluent-material retarder
340	DF	.~.~ Using frictional retarder (e.g., strap, disc, drum, etc.)
341	DF	.~.~ Carriage-buffer stop or rebound control
342	DF	.~ Margin-regulator (e.g., adjustable margin-stop) mechanism
343	DF	.~.~ With intermediate margin-stop
344	DF	.~.~ With other typewriter function controlled by margin-stop (e.g., signal, line-space)
345	DF	.~.~.~ Carriage-arrest function (e.g., "overbank")
346	DF	.~.~.~ Print-line locking function
347	DF	.~.~ With multiple-pitch selector
348	DF	.~.~ With release of margin-stop
349	DF	.~.~ Conjointly set or centrally spring biased
350	DF	.~.~ On record-medium table or paper-finger
351	DF	.~.~ Margin-stop structure, per se
352	DF	.~ Carriage, per se, or guideway therefor
353	DF	.~.~ Including auxiliary carriage
354	DF	.~.~ Guideway or bearings for carriage
354.1	DF	.~.~.~ Guideway cooperating with ball bearings or roller bearings
354.2	DF	.~.~.~.~ Including bearing holder geared to carriage
354.3	DF	.~.~.~.~ Including respositionable guideway
355	DF	.~ Means for repositioning carriage or platen thereon
356	DF	.~.~ To nonprint position
357	DF	.~.~ To detach carriage
358	DF	.~.~ To detach platen
359	DF	HAVING TYPEWRITER-CONTROLLED RECIPROCABLE ELECTROMAGNETIC DRIVE FOR TYPE BAR ACTUATION IN SAME TYPEWRITER
360	DF	.~ Including electromagnetic return of universal actuator
361	DF	.~ Including actuator to complete depression of selected key or key lever
362	DF	.~ Including universal actuator to actuate selected type-bar action
363	DF	.~.~ And individual solenoids to connect the type-bar action to be actuated
364	DF	.~ Including individual solenoids to actuate the selected type-bar action
365	DF	HAVING ROTATED POWER DRIVE INTERMITTENTLY APPLIED FOR TYPE-BAR ACTUATION
366	DF	.~ Including jam-release means
367	DF	.~ Interposed components driven by filter shaft
368	DF	.~ For repeat-type action
369	DF	.~.~ With prevention of repeat typing
370	DF	.~ Via continously rotated power roll
371	DF	.~.~ And oscillatable cam
372	DF	.~.~ And rotatable cam (e.g., single-lobe cam)
373	DF	.~.~.~ Including double-lobe cam
374	DF	.~.~ And friction leg (e.g., other than by cam)
375	DF	.~.~ Snatch roll
375.1	DF	.~.~.~ Including plural coaxial snatch discs
375.2	DF	.~.~.~ With control of impact force
375.3	DF	.~.~.~ With electromagnetic control of pawl
375.4	DF	.~.~.~ And star wheel
376	DF	.~.~ With control of impact force
377	DF	.~ Via limited-rotation clutch
378	DF	.~.~ Plural cams clutched to drive shaft
379	DF	.~ Via spring drive (e.g., spring-driven snatch roll)
380	DF	.~.~ Including individual spring for each type-bar action
381	DF	.~.~ Including reciprocable common actuator
382	DF	.~ Via reciprocating common actuator
383	DF	TYPE-BAR-ACTION MECHANISM OR TYPE-FACE ON TYPE-BAR OR TYPE-FACE INKER
384	DF	.~ Spring drive for type-bar action
385	DF	.~ With added-motion mechanism for type-bar near print-point
386	DF	.~.~ Including toggle-linkage
387	DF	.~.~ Including momentum accumulator
388	DF	.~.~ Including hammer, roller, or presser mechanism
388.1	DF	.~.~.~ Type-bar pivotable to vicinity of print-point
389	DF	.~.~ With power assist for mechanism
390	DF	.~ With end-thrust mechanism for type-bar
391	DF	.~.~ Type-bar slidable on flat support
391.1	DF	.~.~.~ Driven by gear means
391.2	DF	.~.~.~ Driven by cam means
391.3	DF	.~.~.~ Driven by toggle-linkage
391.4	DF	.~.~.~ With power assist for mechanism
392	DF	.~.~ Including momentum accumulator
393	DF	.~.~ For top-strike or bottom-strike typewriter
394	DF	.~ With type-bar pivot traveling during typing movement of type-bar
395	DF	.~.~ Type-bar pivot on longitudinally movable carriage in top-strike typewriter
396	DF	.~.~ With ink pad on type-bar rest
397	DF	.~ With disconnection of type-bar action during movement thereof
398	DF	.~ With accelerated (e.g., motion amplifying)type-bar action
399	DF	.~.~ By rolling contact between links
399.1	DF	.~.~.~ By key-lever rolling on fulcrum
400	DF	.~.~ By cam-engaging link
401	DF	.~.~ By breaking and straightening toggle-linkages
402	DF	.~.~ By breaking toggle-linkage (e.g., to pull type-bar to print-point)
403	DF	.~.~ By straightening toggle-linkage (e.g., to push type-bar to print-point)
404	DF	.~.~ Including adjustment of toggle-linkage anchor position
405	DF	.~.~ By type-bar connecting link
405.1	DF	.~.~.~ Including gear connection
406	DF	.~.~ By pin and slot connection
407	DF	.~.~ Including type-bar starter means
408	DF	.~ For bottom-strike typewriter
409	DF	.~.~ Including simultaneous actuation of plural type-bars for simultaneous imprinting
410	DF	.~.~ With pivotally mounted platen carrier (e.g., for access, etc.)
411	DF	.~.~ Type-bar actuated by rack and gear
412	DF	.~.~ Including type-bar mounting arrangement
413	DF	.~.~ With type-face inker (e.g., ink-pad rest)
414	DF	.~.~ Including key or key-lever arrangement
415	DF	.~ For top-strike typewriter
416	DF	.~.~ Including type-bars pivoted on both sides of, or above and across, platen axis
417	DF	.~.~ With type-face inker (e.g., ink pad, roller, etc.)
418	DF	.~.~ Type-bar pivoted by gear connection
419	DF	.~.~ Type-member or type-bar pivoted and rotatable (e.g., for selection of type face)
420	DF	.~.~ Type-bar pivoted by push link
421	DF	.~.~ Type-bar pivoted by cam
422	DF	.~ Type-bar action
423	DF	.~.~ Including selectively disengageable type-bar action to render action inoperable
424	DF	.~.~ With type-face pivoted on type-bar for rolling contact with platen
425	DF	.~.~ Including jam-release means
426	DF	.~.~ Including type-bar return before release of key lever
427	DF	.~.~ Including yieldable link in type-bar action
428	DF	.~.~ Including means to limit type-bar movement
429	DF	.~.~ Type-bar pushed or pulled by hooklike cam
430	DF	.~.~ Type-bar pulled to print-point
430.1	DF	.~.~.~ By cam means (e.g., slotted cam, helix, etc.)
430.2	DF	.~.~.~ By toggle-linkage
430.3	DF	.~.~.~ With movable type-bar-segment
431	DF	.~.~ Type-bar moved to print-point by gear drive
432	DF	.~.~ Type-bar moved to print-point by cam means
433	DF	.~.~ Type-bar moved to print-point by toggle-linkage
434	DF	.~.~ Including connecting link or joint
434.1	DF	.~.~.~ Adjustable (e.g., in length, etc.)
434.2	DF	.~.~.~ Flexible (e.g., spring, strap, etc.)
434.3	DF	.~.~.~ Including connecting element (e.g., joint, etc.)
435	DF	.~ Type-bar rebound preventer (e.g., via latch, brake, linkage, etc.)
436	DF	.~ Type-bar return spring connected to type-bar-action linkage
437	DF	.~.~ For impact control
438	DF	.~.~ With adjustment means (e.g., for "touch" control, ect.)
438.1	DF	.~.~.~ Including an indicator
439	DF	.~.~ Attached to type-bar or universal-bar
440	DF	.~.~ Attached to key lever (e.g., tension spring)
440.1	DF	.~.~.~ Compression spring
440.2	DF	.~.~.~ Cantilever spring (e.g., torsion, hairpin, etc.)
441	DF	.~ Type-bar pivot support
442	DF	.~.~ For plural groups of type-bars
442.1	DF	.~.~.~ Having type-bars disposed on plural ring supports
442.2	DF	.~.~.~ Including type-bars pivoted on vertical pivot(s) (e.g., moved in horizontal plane)
443	DF	.~.~ Ring support
444	DF	.~.~ Type-basket laterally movable relative to platen and key-board
445	DF	.~.~ Type-bar-segment (e.g., wire journal)
445.1	DF	.~.~.~ With guide for movement of segment
445.2	DF	.~.~.~ Including hanger for individual type-bar
445.3	DF	.~.~.~.~ And bearing for type-bar
445.4	DF	.~.~.~ Interchangeable (i.e., easily removable) segment
445.5	DF	.~.~.~ With type-bar anvil
446	DF	.~.~ Interconnected (e.g., nested) support bearings
447	DF	.~.~ Ball-and-socket bearing for type-bar (e.g., universal joint)
448	DF	.~.~ Roller bearing or ball bearing for type-bar
448.1	DF	.~.~.~ Including plural bearings for each type-bar
449	DF	.~.~ Adjustable bearing for type-bar
450	DF	.~.~ Pin support for type-bar
451	DF	.~.~ Wire support for type-bars
452	DF	.~ Type-bar structure
453	DF	.~.~ With type-face movable in plane of type-bar movement
454	DF	.~ Type-bar rest or rest support
455	DF	.~.~ Including metallic material
456	DF	.~ Type-bar or type-member guide structure
457	DF	.~.~ Including resilient means for energy absorption or kickback
458	DF	.~.~ Mounted on platen-carriage
459	DF	.~.~ For thrusted type-bar
460	DF	.~.~ Guide adjacent print-point
460.1	DF	.~.~.~ Including rollers or balls
460.2	DF	.~.~.~ Including pin or collar
461	DF	.~.~ Adjustable guide
462	DF	.~ Type-member structure
463	DF	.~.~ Removable type-member
464	DF	.~.~ Rotatable on type-bar
465	DF	.~.~ Pivotable on type-bar
466	DF	.~.~ Type-face or type-die configuration (e.g.,reverse image, boldface, piercing, etc.)
467	DF	.~ Dust guard for type-bar action mechanism
468	DF	.~.~ For type-bar bearing (e.g., shield on type-bar-segment)
469	DF	.~ Attachment to type-bar for imprinting extra character
470	DF	.~ Ink-impregnated type-face or inker for type-face
471	DF	.~.~ Including stationary ink pad for inking type-face directly
471.1	DF	.~.~.~ And a wick for feeding pad from reservoir
472	DF	KEY-BOARD OR KEY LEVER-ACTUATING MECHANISM
473	DF	.~ Including mechanism (e.g., auxiliary key-board) for activating keys
474	DF	.~.~ Electromagnetic key-board-drive mechanism
475	DF	.~.~ Operated by user's leg (e.g., foot, knee, etc.)
476	DF	.~.~ For actuating function key only
477	DF	.~ Including means generating a signal for type selecting or other typing function
478	DF	.~.~ Via slidable code bars
479	DF	.~.~ Via electrical component (e.g., switch, stylus, etc.) in or with key-board
479.1	DF	.~.~.~ Capacitance-responsive switch
479.2	DF	.~.~.~ Electromagnetic-responsive switch
480	DF	.~ Including control of key action (e.g., buffer, etc.)
481	DF	.~.~ By regulating key force or movement (e.g., key dip or stroke)
482	DF	.~ For stenographic typewriter
483	DF	.~ For Braille typewriter
484	DF	.~ For foreign-language typewriter
485	DF	.~ Key-board having multiple-character, multiple-movement keys
486	DF	.~ Key-board arranged according to character location
487	DF	.~.~ Color-coded key-board
488	DF	.~ Key-board including row of keys having different heights
489	DF	.~ Key-board including keys grouped to facilitate positioning of typist's fingers
490	DF	.~ Key-cap or key-stem structure
491	DF	.~.~ Including cushioning means (e.g., yieldable surface)
491.1	DF	.~.~.~ Including underlying air cushion
491.2	DF	.~.~.~ Including spring supporting key cap or key stem
491.3	DF	.~.~.~.~ With sensory indicator (e.g., sound, tactile response, etc.)
492	DF	.~.~ Adjustable in plane of key(s) (e.g., to facilitate reach, rotatable, etc.)
493	DF	.~.~ Including character-bearing disc on key cap
493.1	DF	.~.~.~ Secured by encircling ring member
493.2	DF	.~.~.~.~ With slot for exchanging disc
494	DF	.~.~ Having raised or recessed character
495	DF	.~.~ Including means for mounting key cap or key stem
495.1	DF	.~.~.~ By spring means
496	DF	.~ Key lever or space-bar mounting structure (e.g., dust guard, buffer, pivot, etc.)
497	DF	WITH CONTROL OF "CARBON PAPER" FOR TYPING PLURAL SIMULTANEOUS COPIES BY SINGLE IMPRESSION (E.G., ON "MANIFOLD SET")
498	DF	.~ Including prevention of full imprint on "carbon copy" record-medium
499	DF	.~ On record-medium wound around platen together with carbon paper
500	DF	.~ With means for causing slack in web of manifold set
501	DF	.~.~ By arcuate movement of carbon paper carrier
502	DF	.~.~ By clamp on carbon paper carrier
503	DF	.~ By use of other than rectangular sheet carbon paper (e.g., disc, etc.)
504	DF	.~.~ Endless-band carbon paper
505	DF	.~ By multicolor carbon paper
506	DF	.~ With means to prevent creep (e.g., relative movement) between record-media
507	DF	.~ Including means for creep feed of carbon paper
508	DF	.~ Including spool or support for roll of carbon paper
509	DF	.~.~ Including a flat roll or core therefor
510	DF	.~.~ And guide for changing feed direction
510.1	DF	.~.~.~ Spool support shiftable to and from platen
511	DF	.~.~ Feed mechanism for feed from roll of carbon paper
511.1	DF	.~.~.~ Responsive to return of carriage
511.2	DF	.~.~.~ With retraction of carbon paper for reuse thereof (e.g., by slidable carrier)
511.3	DF	.~.~.~.~ Carbon paper rewound for retraction
511.4	DF	.~.~.~.~.~ By driving carbon paper roll directly from platen (e.g., by endless band)
512	DF	.~.~ And support for roll of record-medium
513	DF	.~ Including relative movement between carbon paper and record-medium
514	DF	.~.~ Including positioning of auxiliary record-medium
515	DF	.~.~ Including front insertion of carbon paper or record-medium
516	DF	.~.~ By simultaneously advancing record-medium and retracting carbon paper
517	DF	.~.~ By means to arrest advance of carbon paper
518	DF	.~.~ Carbon paper carrier(s) respositionable relative to platen
518.1	DF	.~.~.~ Plural carriers disposed side-by-side for selective use singly or simultaneously
518.2	DF	.~.~.~ Plural carries for serial retraction of plural carbon papers
518.3	DF	.~.~.~ With means to imprint selectively on one or more media (e.g., by holding selected media away from print-line)
518.4	DF	.~.~.~ Including retraction of carbon paper and record-medium and subsequent advance of record-medium
519	DF	.~.~.~ Carbon paper carrier movable rectilinearly
519.1	DF	.~.~.~.~ With means to hold record-medium against retraction
519.2	DF	.~.~.~.~ Including means to reduce binding of carbon paper during retraction
519.3	DF	.~.~.~.~.~ Including lifting of platen for retraction of carrier
519.4	DF	.~.~.~.~.~ With guard over settable parts (e.g., denominational jacks, etc.)
519.5	DF	.~.~.~.~.~ With relative movement betweem record media (e.g., for condensed-billing, etc.)
519.6	DF	.~.~.~.~ With support or guiding or positive-driving structure for carrier (e.g., table, adjustable stop, etc.)
519.7	DF	.~.~.~ Carbon paper carrier on endless member
520	DF	.~ Carbon paper holder (e.g., loading board, etc.)
521	DF	FOR TYPING ON CARD IN CARD HOLDER
522	DF	.~ Flexible holder fed around platen with single card
523	DF	.~ On card pierced or indented to aid holding
524	DF	.~ Holder movable responsive to case-shift
525	DF	.~ Card holder carrier by platen
526	DF	.~.~ And actuated in response to platen rotation
527	DF	.~.~ With platen surface modified for card
527.1	DF	.~.~.~ Including card gripper on platen
527.2	DF	.~.~.~ Including axially extending slot or hollow in platen
528	DF	.~.~ Holder attached via detachable arms at ends of platen
529	DF	.~.~ Holder attached via pins on holder or via adhesive attachment
530	DF	.~.~ Holder attached via element (e.g., band) gripping platen periphery
531	DF	.~ Including line-spacing of holder or card
532	DF	.~.~ Variable line-spacing (e.g., platen creep)
533	DF	.~.~ In a curvilinear path
534	DF	.~.~ By pinion and rack
535	DF	.~ Including support engaging bottom edge of card
536	DF	.~ Card holder mounted on typewriter frame
537	DF	.~.~ Including means enabling movement of card relative to holder
538	DF	.~.~ Transparent card holder
539	DF	.~.~ Including finger movable away from holding position
540	DF	.~.~.~ Spring urged to holding position
541	DF	.~ Including a feed-roller
542	DF	.~ Card holder mounted on platen-carriage frame
543	DF	.~ Including gripper or means urging card against platen
544	DF	.~ Backing for stencil cutting (e.g, celluloid strip, etc.)
545	DF	FOR LINE-SPACING BY INCREMENTAL ROTATION OF PLATEN
546	DF	.~ To facilitate condensed billing (i.e., by determining a desired limit or amount of retrograde or advance platen movement)
547	DF	.~.~ Including stop structure (e.g, traveling stop, etc.)
547.1	DF	.~.~.~ For arresting platen at limit of both retrograde and advance movement
547.2	DF	.~.~.~.~ By stop travelling in a rectilinear path
547.3	DF	.~.~.~.~ By lever or push-rod drive for platen
547.4	DF	.~.~.~.~.~ Via gear drive
547.5	DF	.~.~.~.~.~.~ Including lever on axis transverse to platen axis
547.6	DF	.~.~.~.~.~.~ Including relatively adjustable coaxial gear segments
547.7	DF	.~.~.~.~.~ Via pawl and ratchet wheel drive
547.8	DF	.~.~.~.~.~.~ With spring motor
548	DF	.~.~ With graduated scale (e.g., on drum periphery)
549	DF	.~ Actuated by key on key-board
550	DF	.~ For multi-incremental rotation (e.g., "platen sweep")
551	DF	.~ For line-spacing in forward or reverse direction
552	DF	.~ With "floating" platen
553	DF	.~ Via line-space / carriage-feed-release actuator
554	DF	.~ For facilitating even wear of platen surface (e.g., by irregular increments, etc.)
555	DF	.~ By irregular increments of platen rotation (e.g., for adjustment of platen relative to its actuator, etc.)
556	DF	.~.~ Including disconnecting ratchet wheel from platen (e.g., declutching ratchet, etc.)
556.1	DF	.~.~.~ Via relatively displaceable pin and slot members
556.2	DF	.~.~.~ Via toothed ring and locking member(s)
556.3	DF	.~.~.~.~ Including pivotable locking member(s)
556.4	DF	.~.~.~.~ Including radially displaceable locking member(s)
557	DF	.~.~.~ Via ball or roller clutching member(s)
558	DF	.~.~.~ Via binding jaws gripping annular flange between jaws
559	DF	.~.~.~ Via friction plate members engageable by axial displacement (e.g., pressure plate, etc.)
559.1	DF	.~.~.~.~ Friction members have cooperating conical surfaces
560	DF	.~.~.~ Via frictional engagement of periphery of cylindrical member
560.1	DF	.~.~.~.~ Friction member(s) acting on inner periphery of drum
560.2	DF	.~.~.~.~.~ Pivotable member(s)
561	DF	.~.~.~.~.~ Expandable band or split ring
562	DF	.~.~ Including settable stops
563	DF	.~.~ Including plural detents selectively engageable with ratchet wheel
564	DF	.~.~ Including a drive member engageable with line-space ratchet wheel
564.1	DF	.~.~.~ Via displaceable detent
565	DF	.~.~ Detent-release structure
566	DF	.~.~.~ With friction brake for platen
566.1	DF	.~.~.~ With simultaneous disengagement of drive pawl
567	DF	.~.~ Including gear (e.g., differential gear, etc.) structure
568	DF	.~ By electric-power drive
569	DF	.~ By gear train (e.g., including a clutch)
570	DF	.~ By double-cam drive
571	DF	.~ By friction drive (e.g., including regulation of increments)
572	DF	.~ By pawl and ratchet wheel drive
573	DF	.~.~ Including rectilinearly movable pawl
573.1	DF	.~.~.~ And resilient drive
574	DF	.~.~ Including pawl carrier coaxial with ratchet wheel
574.1	DF	.~.~.~ And means to regulate pawl engagement or drive
575	DF	.~.~ Including means to regulate pawl engagement or drive
575.1	DF	.~.~.~ By movable ratchet-wheel shield
575.2	DF	.~.~.~ By stop adjustable to limit movement of actuator
576	DF	.~ Via foldable line-space actuator
577	DF	.~ With means to prevent reverse rotation or ensure full increment (e.g., for "backlash" prevention)
578	DF	SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM)
579	DF	.~ Including skew correction responsive to position of sheet or web
580	DF	.~ Including forming indicia on record-medium during typing to find next line to be typed
581	DF	.~.~ To find last-produced slit or hole or notch in sheet
582	DF	.~ Including programmed-control-system for record-medium feed (e.g., on auxiliary record)
583	DF	.~.~ For web record-medium
583.1	DF	.~.~.~ Program on auxiliary-record tape
583.2	DF	.~.~.~ Program is indicia on rotatable disc or drum
583.3	DF	.~.~.~ Program is indicia on record-medium
583.4	DF	.~.~.~ Including plural speed record-medium feed
584	DF	.~ Including feed of plural record-media arranged side-by-side (e.g., fed independently of platen)
585	DF	.~.~ By divided platen
585.1	DF	.~.~.~ With positive clutch for simultaneous rotation of platen sections
586	DF	.~ Including feed of tally strip record-medium (e.g., plural tally strips)
587	DF	.~.~ And feed of endless transfer-medium
588	DF	.~.~ On plural-platen (e.g., divided platen) typewriter
589	DF	.~.~ With locking or interlocking mechanism (e.g., line lock, etc.)
590	DF	.~.~ Including feed varied for amount of tally strip on spool
591	DF	.~.~ Including tally-strip feed transverse to feed of main record-medium
592	DF	.~.~ Including feed independent of platen
593	DF	.~.~ With cutting or spring tensioning of tally strip
594	DF	.~.~ Including structure or mounting or adjustment of tally-strip roll
594.1	DF	.~.~.~ And roll for transfer-medium
595	DF	.~ Including insertion of sheet from front of platen (e.g., for "condensed billing", via sheet guide, etc.)
596	DF	.~.~ Including feed responsive to presence of sheet
597	DF	.~.~ With subsequent line-spacing independent of platen
598	DF	.~.~ With digitally selected, typewriter-actuated feed to selected line to be typed (e.g., via "dialing" disc, etc.)
599	DF	.~.~ Insertion of sheet relative to other record-medium
599.1	DF	.~.~.~ With sheet-associating attachment (e.g., collating-table, etc.)
600	DF	.~.~ Via feed throat having gate (e.g., actuated by power, etc.)
600.1	DF	.~.~.~ With platen repositioned for sheet insertion
600.2	DF	.~.~.~ With feed-roller repositioned for sheet insertion
600.3	DF	.~.~.~.~ And sheet feed by additional feed-roller couple
600.4	DF	.~.~.~.~ Coincident to pivoting of sheet guide
601	DF	.~.~ With laterally movable sheet holder (e.g., having concurrent feed movement)
602	DF	.~.~ With sheet ejector
603	DF	.~.~ Via chute(s) or feed-roller couple (e.g., plural chutes)
603.1	DF	.~.~.~ Pivotable chute
604	DF	.~.~ Attachment to typewriter for converting to condensed-billing operation
605	DF	.~ For feeding plural record media concurrently or selectively
606	DF	.~.~ Plural webs superimposed and aligned to each other during typing
607	DF	.~.~ Including movement of one record-medium relative to another
607.1	DF	.~.~.~ In lateral direction (e.g., lateral shift of web or sheet carrier)
607.2	DF	.~.~.~ By insertion of additional record-medium
607.3	DF	.~.~.~ With concurrent feed-roller and line-spacing control
608	DF	.~.~.~ With clamp for holding one record-medium stationary
608.1	DF	.~.~.~.~ Selectively engageable feed-rollers or feed-roller brakes
608.2	DF	.~.~.~ By auxiliary feed-roller or platen section (e.g., separate feed of sheets)
608.3	DF	.~.~.~ By retrograde movement of one record-medium
608.4	DF	.~.~.~ Including differential movement by separate drive means
609	DF	.~.~ Mount for plural web rolls
610	DF	.~.~ Including sheet-associating attachment (e.g., pin-band-encircling platen)
610.1	DF	.~.~.~ With table or frame (e.g., collating-table)
610.2	DF	.~.~.~.~ Front collating-table with sheet-holding means (e.g., clamps)
610.3	DF	.~.~.~.~.~ Including pin-holding means
610.4	DF	.~.~.~.~.~ Including indicator
611	DF	.~ For feeding web record-medium
612	DF	.~.~ Feeding web or sheet in perpendicular directions
613	DF	.~.~ With web supply or takeup or mount therefor (e.g., web cartridge, etc.)
613.1	DF	.~.~.~ Including insertion of leading edge of web
613.2	DF	.~.~.~ For folded or creased web (e.g., fan-folded web)
613.3	DF	.~.~.~.~ With web smoother
613.4	DF	.~.~.~.~ Holder for fan-folded web mounted to move with carriage
614	DF	.~.~.~ Including web rewind
614.1	DF	.~.~.~.~ Connected to platen drive
615	DF	.~.~.~ Mounted on typewriter having transversely moving carriage
615.1	DF	.~.~.~.~ Mounted to move with carriage
615.2	DF	.~.~.~ For feeding tape in direction of print-line (i.e., transverse feed)
616	DF	.~.~ By pin-feed means (e.g., reciprocating pin, etc.)
616.1	DF	.~.~.~ Including laterally adjustable bands (e.g., tractor feed, etc.)
616.2	DF	.~.~.~ Pin feed on endless band
616.3	DF	.~.~.~ Pin wheel (e.g., on platen cylinder)
617	DF	.~.~ By friction-feed means (e.g., reciprocating finger or gripper or pinch roller, etc.)
618	DF	.~.~ With web tensioning or braking
619	DF	.~.~ Including web guiding or aligning (e.g., laterally, relative to print-line, etc.)
620	DF	.~.~ Including web shifting to view print-line
621	DF	.~.~ With web cutter (e.g., tear bar, wire tool, etc.)
621.1	DF	.~.~.~ For longitudinal cut
621.2	DF	.~.~.~ And gauge for tear-off length
622	DF	.~ With holder for single sheet (e.g., clip, backing sheet, etc.)
623	DF	.~.~ Mounted on carriage (e.g., for extra-wide sheet, cylindroidal holder, etc.)
624	DF	.~ For feeding sheet from stack or pack holder
625	DF	.~.~ And delivering to sheet receiver (e.g., by roller couple)
626	DF	.~.~ By engaging between flap and body of envelope
627	DF	.~.~ By pneumatic means
628	DF	.~.~ By reciprocating of oscillating member
629	DF	.~.~ By endless-band or rotating (e.g., feed-roller) member
630	DF	.~ Including aligning of sheet edge prior to typing
631	DF	.~.~ Aligner moved to operate concurrently with disengagement of feed means
632	DF	.~.~ Including leading-edge aligner located past print-point
632.1	DF	.~.~.~ Adjustable leading-edge aligner
633	DF	.~.~ Side-edge aligner (e.g., adjustable, etc.)
633.1	DF	.~.~.~ On rear sheet table or apron
633.2	DF	.~.~.~.~ Adjustable aligner (e.g., with lock)
634	DF	.~ Including friction-feed means (e.g., band)
635	DF	.~.~ By endless-feed band
636	DF	.~.~ By roller couple (e.g., rotatable pinch rollers, etc.)
636.1	DF	.~.~.~ With typewriter-actuated control of feed-roller position
636.2	DF	.~.~.~ Including intermediate drive means (e.g., gears) connecting feed-roller to platen
636.3	DF	.~.~.~ Including feed-roller having equalizing or pressure-adjusting means
637	DF	.~.~.~ Including lower feed-roller(s) (e.g., pressure roller, etc.)
637.1	DF	.~.~.~.~ Including concurrent control for disengagement of upper and lower feed rollers
637.2	DF	.~.~.~.~ Mounted on apron
637.3	DF	.~.~.~.~ Mounted on plural roller carriers
637.4	DF	.~.~.~.~.~ Including plural parallel carrier pivots
637.5	DF	.~.~.~.~.~ Including single carrier pivot intermediate front and rear lower feed rollers
637.6	DF	.~.~.~.~ Mounted on single carrier having pivot intermediate front and rear lower feed-rollers
638	DF	.~.~.~ Including feed or pressure roller mounted on "paper-finger"
639	DF	.~.~.~ Including upper feed-roller(s) (e.g, pressure roller, etc.)
639.1	DF	.~.~.~.~ Mounted on "paper bail"
639.2	DF	.~.~.~.~.~ Disengaged from platen by compound movement of bail (e.g., on double pivoted mount)
640	DF	.~.~.~ With cooperating scale
641	DF	.~.~.~ Feed-roller structure or brake or spacer therefor
642	DF	.~ Including sheet guide (e.g., for sheet insertion, etc.)
643	DF	.~.~ Platen-encircling band
644	DF	.~.~ Sheet stripper (e.g., for preventing reentry, etc.)
645	DF	.~.~ Sheet holddown member (e.g., "paper-finger", end-of-page holddown, etc.)
645.1	DF	.~.~.~ With aperture or notch (e.g., for typing therethrough, etc.)
645.2	DF	.~.~.~ On or with erasing plate or signal or indicator
645.3	DF	.~.~.~ Movably mounted on movable finger carrier
645.4	DF	.~.~.~ Pivotally mounted holddown
645.5	DF	.~.~.~ Mounted in front of platen axis
646	DF	.~.~ Sheet table at delivery side of platen
647	DF	.~.~ Movable sheet table or apron (e.g., detachable, extensible, etc.)
647.1	DF	.~.~.~ Pivotable (e.g., fingerlike support)
648	DF	PLATEN OR PLATEN-MOVING MECHANISM
649	DF	.~ For movement of platen other than for line-spacing
650	DF	.~.~ Cylindrical platen adjustable to facilitate compactness
651	DF	.~.~ Cylindrical platen axially adjustable
652	DF	.~.~ Platen movment conjointly with type-face movement
653	DF	.~.~ By eccentric mounting for platen
654	DF	.~ Character-size platen (e.g., anvil, disc, etc.)
655	DF	.~.~ Mounted on movable carrier
656	DF	.~ Bar (i.e., line size) platen
657	DF	.~.~ Mounted on cylindrical member
658	DF	.~ Semicylindrical platen
659	DF	.~ Cylindrical platen
660	DF	.~.~ Detachably secured to platen carriage
660.1	DF	.~.~.~ By axially displaceable supporting shaft
660.2	DF	.~.~.~ By pivoted member overlying platen shaft
660.3	DF	.~.~.~ By disengageable platen sectors
661	DF	.~.~ With sound-muffling means
661.1	DF	.~.~.~ Including plural layers of varying hardness
661.2	DF	.~.~.~ Including cylinder containing fluent (e.g., fluid, etc.) material
661.3	DF	.~.~.~ Including cylindrical sections or rings (e.g., of character-space width)
661.4	DF	.~.~.~ Including a wound member
662	DF	.~.~ Including particular surface characteristic (e.g., translucent, pigment yielding, corrugated, of varying hardness, etc.)
663	DF	LOCKING OR INTERLOCKING MECHANISM
664	DF	.~ For interlocking plural functions or mechanisms
665	DF	.~.~ Plural carriage-moving mechanisms (e.g., escapement, tabulation, etc.)
666	DF	.~.~ Plural keys or key linkages (e.g., for type-face selection, etc.)
667	DF	.~ Key-board lock using interlock mechanism
668	DF	.~ Locking means actuated in response to a condition
669	DF	.~.~ Failure of power supply
670	DF	.~.~ End-of-page lock (e.g., responsive to preset condition)
670.1	DF	.~.~.~ Responsive to end-of-page sensor
670.2	DF	.~.~.~ Including lock for platen or line-space
670.3	DF	.~.~.~.~ By cam groove and follower
671	DF	.~.~ End of maximum typed line
671.1	DF	.~.~.~ Actuated by space-bar
671.2	DF	.~.~.~ Universal-bar lock (e.g, pivoted latch, slidable latch, etc.)
671.3	DF	.~.~.~.~ Actuated by paper-finger
671.4	DF	.~.~.~.~ Interposed component
672	DF	.~.~.~ Escapement lock
672.1	DF	.~.~.~ Type-bar lock
672.2	DF	.~.~.~ Key-lever lock (e.g., by hook on key-lever)
673	DF	.~.~ Coin-controlled lock (e.g., responsive to print-lines, time, etc.)
674	DF	.~ For locking carriage in centered position (e.g., with shipping support)
675	DF	.~.~ And disengaging case-shift lock
676	DF	.~ Key-board security lock (e.g., cover plate, etc.)
677	DF	.~ For locking selected group(s) of keys
678	DF	.~ For locking key in actuated position (e.g., to remove type-face from ink pad)
679	DF	MEANS AUXILIARY TO TYPEWRITING FUNCTION
680	DF	.~ Means for collapsing typewriter or support for record-medium or copy
681	DF	.~.~ By tilting typewriter (e.g., via collapsible legs, etc.)
682	DF	.~.~ By moving key-board relative to frame (e.g., into plural operating positions, etc.)
683	DF	.~.~ By moving carriage relative to frame
684	DF	.~.~ By moving type-bars relative to frame
685	DF	.~.~ Including typewriter built into carrying case
686	DF	.~ Buffer (e.g., dashpot, of particular material, etc.) for movable typewriter element
687	DF	.~.~ Having nonimpact movement
688	DF	.~ Means for increasing typewriter noise
689	DF	.~ Means for muffling typewriter noise
690	DF	.~.~ By sound-barrier enclosure for typewriter (e.g., by sound-absorbing material)
690.1	DF	.~.~.~ With viewing window (e.g., having reflection eliminator)
690.2	DF	.~.~.~.~ And externally protruding (e.g., key-board, etc.) operating means
690.3	DF	.~.~.~ With externally protruding operating means
690.4	DF	.~.~.~ Including means facilitating opening of enclosure
691	DF	.~ Frame, casing, or support for typewriter
692	DF	.~.~ Having means facilitating interchange of parts
693	DF	.~.~ Housing structure
693.1	DF	.~.~.~ For ink-ribbon spool (e.g., spool cover, etc.)
694	DF	.~.~ Made of particular material (e.g., plastic, etc.)
695	DF	.~ Means for correcting typing errors (e.g., by abrasive eraser, etc.)
696	DF	.~.~ By laser beam or adhesive-surface ribbon or chemical eradicator
697	DF	.~.~ By overprinting (e.g, with coated material) to cancel error
697.1	DF	.~.~.~ With drive for ribbon having coating thereon
698	DF	.~.~ With erasing table
699	DF	.~.~ With receptacle for refuse
700	DF	.~.~ With means for rubbing eraser over surface of record-medium
701	DF	.~ Means for cleaning, or facilitating cleaning of, type-face
702	DF	.~.~ By contacting type-face (e.g., via type-face cleaner, brush, etc.)
702.1	DF	.~.~.~ Including means for moving brush
703	DF	.~ Indicator means
704	DF	.~.~ For indicating typist's skill or needed adjustment
705	DF	.~.~ For indicating position of carriage along print-line
705.1	DF	.~.~.~ Of carriage for type-head-carrier
705.2	DF	.~.~.~ With word counter
705.3	DF	.~.~.~ By means driven from carriage (e.g., for indicating end of print-line, etc.)
705.4	DF	.~.~.~ Scale for facilitating tabulation
705.5	DF	.~.~.~ Scale for facilitating centering of print-line
706	DF	.~.~ For indicating position of line or end-of-page
706.1	DF	.~.~.~ By scale mounted on paper table
707	DF	.~.~.~ By means driven from platen cylinder
707.1	DF	.~.~.~.~ Drive initiated by detector of record-medium
707.2	DF	.~.~.~.~ Including relatively movable pointer and scale (e.g., rotatable or rectilinearly movable pointer)
707.3	DF	.~.~.~.~.~ Scale rotated by gear drive
707.4	DF	.~.~.~.~.~ Rotatable scale coaxial with platen cylinder
707.5	DF	.~.~.~.~ With line numbering
708	DF	.~.~.~ Including detector of record-medium
708.1	DF	.~.~.~.~ Having electrical contacts separated by record-medium
709	DF	.~.~ For aligning record-medium with print-point or print-line (e.g., for facilitating correction of error, etc.)
709.1	DF	.~.~.~ By transparent indicator
709.2	DF	.~.~.~ For indicating print-line alignment
710	DF	.~.~ Including a page counter
711	DF	.~.~ Including a light
712	DF	.~.~ Including means producing an audible sound (e.g., plural tones, etc.)
713	DF	.~ Attachment for shielding or screening record-medium or typewriter (e.g., against wind, etc.)
714	DF	.~.~ For screening key-board
715	DF	.~ Attachment for guiding fingers or hands of typist (e.g., hand rest)
716	DF	.~ Attachment for illuminating or viewing (e.g., prism, etc.)
717	DF	.~ Attachment for holding an article (e.g., pencil, eraser, etc.)
718	DF	.~.~ Copyholder
718.1	DF	.~.~.~ Actuated by typewriter (e.g., to simulate line-spacing, for web copy, etc.)
718.2	DF	.~.~.~.~ With adjustment of line-spacing
719	DF	MISCELLANEOUS
		******************************
		CROSS-REFERENCE ART COLLECTIONS
		******************************
900	DF	CHEMICAL-SYMBOL CHARACTER
901	DF	CONTINUOUSLY ROTATING TYPE-HEAD
902	DF	STEPPING-MOTOR DRIVE FOR WEB FEED
903	DF	STEPPING-MOTOR DRIVE FOR CARRIAGE FEED
904	DF	SUBSCRIPT OR SUPERSCRIPT CHARACTER

US Patent Class 400 TYPEWRITING MACHINES

Current as of: June, 1999 Click for Main Headings Click DF for Definitions Click for All Classes

Internet Version by PATENTEC © 1999 Terms of Use

US Patent Class 400
TYPEWRITING MACHINES

Current as of: June, 1999
Click for Main Headings
Click DF for Definitions
Click for All Classes