US Patent Class 318
ELECTRICITY: MOTIVE POWER SYSTEMS



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  ELECTRIC MOTOR WITH NONMOTOR DRIVING MEANS (E.G., AXLE DRIVE, MANUAL DRIVE)
2  DF  .~ Manual driving means
3  DF  WITH PARTICULAR MOTOR-DRIVEN LOAD DEVICE
4  DF  .~ Plural, diverse or diversely controlled load device
5  DF  .~.~ Plural motor drive
6  DF  .~ Tension-maintaining type of motor-control system
7  DF  .~.~ Plural, diverse or diversely controlled motors
8  DF  .~ Plural, diverse or diversely controlled driving motors (e.g., driving differential gearing)
9  DF  .~ Power- or motion-transmitting mechanism
10  DF  .~.~ Reversible drive mechanism
11  DF  .~.~ Variable speed mechanism
12  DF  .~.~.~ Gearing
13  DF  .~.~.~.~ Differential type
14  DF  .~.~ Motion-converting mechanism
15  DF  .~.~ Mechanical gearing
16  DF  SUPPLIED OR CONTROLLED BY SPACE-TRANSMITTED ELECTROMAGNETIC OR ELECTROSTATIC ENERGY (E.G., BY RADIO)
17  DF  PORTABLE-MOUNTED MOTOR AND/OR PORTABLE-MOUNTED ELECTRICAL SYSTEMS THEREFOR
560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS)
561  DF  .~ Adaptive or optimizing systems including "bang-bang" servos
562  DF  .~ Time-sharing or multiplexing systems
563  DF  .~ With protective or reliability increasing features (e.g., "fail-safe" systems)
564  DF  .~.~ "Redundant" operating channels
565  DF  .~.~ Monitoring systems
566  DF  .~.~ Maneuver, force, or load-limiting
567  DF  .~ Program- or pattern-controlled systems
568.1  DF  .~.~ With program recording or composing means
568.11  DF  .~.~.~ Multifunction manipulator (i.e., Robot)
568.12  DF  .~.~.~.~ Mobile robot
568.13  DF  .~.~.~.~ With particular program teaching method
568.14  DF  .~.~.~.~.~ Manual lead through
568.15  DF  .~.~.~.~ With particular interpolation means
568.16  DF  .~.~.~.~ With particular sensing device
568.17  DF  .~.~.~.~ With multimode control (e.g., course-fine, position-force, etc.)
568.18  DF  .~.~.~.~.~ Including velocity control
568.19  DF  .~.~.~.~ With particular coordinate transformation means
568.2  DF  .~.~.~.~ With plural control systems (e.g., the interaction of plural processors to control the plural joints of a single robot):
568.21  DF  .~.~.~.~.~ Including end effector (e.g., gripping jaw, micromanipulator, etc.)
568.22  DF  .~.~.~.~ With particular compensation (e.g., gain, offset, etc.)
568.23  DF  .~.~.~.~.~ Including program modification
568.24  DF  .~.~.~.~ With reliability enhancement means (e.g., monitoring, redundant circuits, etc.)
568.25  DF  .~.~.~.~.~ Including display device
569  DF  .~.~ Digital or numerical systems
570  DF  .~.~.~ Contouring systems
571  DF  .~.~.~.~ With "feed-rate" control
572  DF  .~.~.~.~ With "zero-offset" or tool radius correction
573  DF  .~.~.~.~ With interpolating means
574  DF  .~.~.~.~ Multiple axes point to point systems
575  DF  .~.~ Multiple axes analog systems
576  DF  .~.~.~ Nonmechanical line, seam or edge followers
577  DF  .~.~.~.~ Optical or photoelectric line followers
578  DF  .~.~.~ Cam or template followers
579  DF  .~.~.~ Multiple pass systems
580  DF  .~ Vehicular guidance systems with single axis control
581  DF  .~.~ Radio-controlled
582  DF  .~.~ Celestial navigation
583  DF  .~.~ Landing systems
584  DF  .~.~ Altitude or pitch control
585  DF  .~.~ Roll control
586  DF  .~.~ Yaw control
587  DF  .~.~ Land vehicles
588  DF  .~.~ Marine vehicles
589  DF  .~.~.~ Submarine and torpedo systems
590  DF  .~ Multiple mode systems
591  DF  .~.~ With mode-engagement features (e.g., manual to automatic)
592  DF  .~.~ Fine and coarse systems
593  DF  .~.~.~ Separate fine and coarse motors
594  DF  .~.~.~ Digital systems
595  DF  .~.~.~ Multiple speed synchro systems
596  DF  .~.~ Combined "on-off" and proportional control
597  DF  .~.~ Slewing systems
598  DF  .~.~.~ With a separate slewing motor
599  DF  .~ Pulse-width modulated power input to motor (e.g., "duty cycle" systems)
600  DF  .~ Digital or numerical systems
601  DF  .~.~ Digital comparison
602  DF  .~.~.~ Commutating switch-type encoder
603  DF  .~.~ Pulse-counting systems
604  DF  .~.~ Analogue comparison
605  DF  .~.~.~ Synchro or resolver (e.g., transmitter simulators)
606  DF  .~ Frequency- or phase-modulated systems
607  DF  .~.~ Frequency comparison
608  DF  .~.~ Phase comparison
609  DF  .~ "Reset" systems (P.I.)
610  DF  .~.~ With rate (P. I. D.) (e.g., reset windup prevention)
611  DF  .~ With stabilizing features (e.g., anti-hunting, damping)
612  DF  .~.~ Electric braking near balance (e.g., dynamic)
613  DF  .~.~.~ D.C. in A.C. windings
614  DF  .~.~ Friction-braking near balance including magnetic or eddy current brakes
615  DF  .~.~ By auxiliary feedback loop
616  DF  .~.~.~ Rate feedback
617  DF  .~.~.~.~ Variable rate feedback
618  DF  .~.~.~.~ Tachometer feedback
619  DF  .~.~ Variable gain bandwidth
620  DF  .~.~ Nonlinear circuits
621  DF  .~.~ Lead or lag networks
622  DF  .~.~.~ A.C. networks
623  DF  .~.~ Load stabilization (e.g., viscous, magnetic or friction dampers)
624  DF  .~.~ By deadband at null (e.g., threshold circuits)
625  DF  .~ Plural servomotors
626  DF  .~ Limit or end-stop control
627  DF  .~.~ Secto-scanning systems
628  DF  .~ "Feelback" systems
629  DF  .~ Unwanted harmonic or voltage component elimination quadrature rejection systems
630  DF  .~ Antibacklash systems (e.g., with unidirectional approach to balance)
631  DF  .~ Antistatic friction features (e.g., "dither" voltage)
632  DF  .~ With compensating features
633  DF  .~.~ "Two-cycle error" compensation
634  DF  .~.~ Temperature compensation
635  DF  .~ With signal-, voltage-, or current-limiting
636  DF  .~ "Sampling" systems including miscellaneous "sampled data" control systems
637  DF  .~ Analog computation
638  DF  .~ With particular "error-detecting" means
639  DF  .~.~ Plural, diverse conditions
640  DF  .~.~ Photoelectric or optical-type measuring instruments
641  DF  .~.~ With particular temperature measuring instrument
642  DF  .~.~ With liquid level measuring instruments
643  DF  .~.~ With moisture content or wetness measuring instruments
644  DF  .~.~ With flow measuring instruments
645  DF  .~.~ With fluid pressure measuring instruments
646  DF  .~.~ With force or weight measuring instruments
647  DF  .~.~ With magnetic field measuring instruments
648  DF  .~.~ With inertial, direction or inclination measuring instrument
649  DF  .~.~.~ Stable platforms
650  DF  .~.~ With current, voltage or electrical power measuring instruments
651  DF  .~.~ With acceleration measuring instruments
652  DF  .~.~ With particular position measuring instruments
653  DF  .~.~.~ Magnetic transducers
654  DF  .~.~.~ Synchro control transmitter-transformer systems
655  DF  .~.~.~.~ With synchro differential
656  DF  .~.~.~ Differential transformer systems
657  DF  .~.~.~.~ Linear differential transformer
658  DF  .~.~.~.~ "E" type transformer
659  DF  .~.~.~.~ "Microsyn" type
660  DF  .~.~.~.~ "Inductosyn" systems
661  DF  .~.~.~.~ Resolver systems
662  DF  .~.~.~ Variable capacitor systems
663  DF  .~.~.~ Potentiometer systems including autotransformers and Wheatstone bridges
664  DF  .~.~.~.~ Minor arc seeking
665  DF  .~.~.~.~ Continuous rotation, unlimited range
666  DF  .~.~.~.~ Controlled tap and slidewire
667  DF  .~.~.~.~ With a bridge in the feedback circuit
668  DF  .~.~.~.~.~ Recalibrating systems
669  DF  .~.~.~ Standing wave
670  DF  .~.~.~ Contact resistance
671  DF  .~ With particular motor control system responsive to the "actuating signal"
672  DF  .~.~ Discontinuous or "on-off" control
673  DF  .~.~.~ Seeking switch type
674  DF  .~.~.~ Wheatstone bridge type
675  DF  .~.~ One transmitter or controller element follows another
676  DF  .~.~ Transmitter or controller element returned (e.g., force balance systems)
677  DF  .~.~ With particular servoamplifier
678  DF  .~.~.~ Differential amplifier
679  DF  .~.~.~ Diverse types of amplifiers in different stage
680  DF  .~.~.~ Magnetic servoamplifiers
681  DF  .~.~.~ Solid-state servoamplifiers
682  DF  .~.~.~ Rotating amplifier (e.g., "Ward Leonard" control)
683  DF  .~.~ With particular phase discriminator
684  DF  .~.~ With particular modulator or detector (e.g., choppers)
685  DF  .~.~ "Step-by-step" motors in closed-loop servos
686  DF  .~.~ Reciprocating or oscillating motors
687  DF  .~.~ Linear movement motors
688  DF  .~.~ Shaded pole motors
689  DF  Torquing motors
690  DF  SELF-SYNCHRONOUS TYPE OF MOTOR
691  DF  .~ With means to amplify transmitter signals
692  DF  .~ Having induction or "selsyn" type transmitter
693  DF  .~ Having impedance-type transmitter
694  DF  .~ Having commutated dynamoelectric machine transmitter
695  DF  .~ Having commutating switch-type transmitter
696  DF  OPEN-LOOP STEPPING MOTOR CONTROL SYSTEMS
34  DF  PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS
35  DF  .~ Motors with diverse motions (e.g., reciprocating and rotary motors)
37  DF  .~ Plural reciprocating or oscillating motors
38  DF  .~ Plural linear-movement motors
39  DF  .~ Work and feed motors (e.g., indexing)
40  DF  .~ Motor biased against rotation
41  DF  .~ Having electrical synchronizing interconnections
42  DF  .~.~ Between windings on auxiliary dynamo-electric machines
43  DF  .~.~ D.C. or A.C. commutator motors with slip rings
44  DF  .~.~ Between induction motor secondaries
45  DF  .~ Mechanically coupled in fixed ratio of movement
46  DF  .~.~ Motors having unlike operating characteristics
47  DF  .~.~.~ Synchronous and nonsynchronous motors
48  DF  .~.~ Mechanically coupled in torque opposition
49  DF  .~ Motors electrically connected in cascade or tandem
50  DF  .~.~ With means for effecting other motor interconnections
51  DF  .~ Plural, diverse motor controls for different motors
52  DF  .~ Slipping and/or racing control for electric motors
53  DF  .~ Plural, diverse motor controls
54  DF  .~.~ Motor-reversing
55  DF  .~.~.~ With running-speed control
56  DF  .~.~.~.~ And braking
57  DF  .~.~.~ And braking
58  DF  .~.~.~ And acceleration control
59  DF  .~.~ Running-speed control
60  DF  .~.~.~ And braking
61  DF  .~.~.~ And acceleration control
62  DF  .~.~.~ And automatic starting and/or stopping and/or with time delay
63  DF  .~.~ Braking
64  DF  .~.~ Acceleration control
65  DF  .~ Motor-reversing
66  DF  .~ Running-speed control
67  DF  .~.~ Diverse speeds for different motors
68  DF  .~.~ Relative motor speed control
69  DF  .~.~.~ With speed-difference detector
70  DF  .~.~.~.~ Electrical-type detectors
71  DF  .~.~.~.~.~ Voltage and/or current difference detector
72  DF  .~.~.~.~.~ Dynamoelectric machine detector
73  DF  .~.~.~.~.~ Synchronously operated impedance detectors
74  DF  .~.~.~.~.~ Synchronously actuated switch detectors
75  DF  .~.~.~.~.~.~ Plural switches connected in series
76  DF  .~.~.~.~ Differential-gearing detector
77  DF  .~.~.~ Controlling motor speed in response to speed of another motor
78  DF  .~.~.~.~ Controlling A.C. frequency or rate of electrical impulses to other motor
79  DF  .~.~.~ Control of both armature (or primary) and field (or secondary) circuits
80  DF  .~.~.~ Armature or primary circuit control
81  DF  .~.~.~ Field secondary circuit control
82  DF  .~.~ Armature or primary circuit control
83  DF  .~.~.~ Series-parallel armature circuit connections
84  DF  .~.~ Field or secondary circuit control
85  DF  .~ Synchronizing or phasing control
86  DF  .~ Braking
87  DF  .~.~ Motor used as braking generator (dynamic braking)
88  DF  .~.~.~ Load or current division during braking
89  DF  .~.~.~ Motor as exciter for another motor
90  DF  .~ Acceleration control
91  DF  .~.~ Accelerating motors in succession or selectively
92  DF  .~.~ Control of both armature (or primary) and field (or secondary) circuits
93  DF  .~.~.~ Series-parallel connected armature or primary circuits
94  DF  .~.~ Armature or primary circuit control
95  DF  .~.~.~ Series-parallel connections
96  DF  .~.~.~.~ With armature circuit impedance
97  DF  .~.~ Field or secondary circuit control
98  DF  .~ Load control
99  DF  .~.~ Fixed ratio of load or current division
100  DF  .~.~.~ By field or secondary circuit control
101  DF  .~ Starting and/or stopping
102  DF  .~.~ Sequential or successive starting and/or stopping
103  DF  .~.~ Selective starting and/or stopping
104  DF  .~.~ Armature (or primary) circuit control
105  DF  .~ Plural, diverse or diversely controlled sources of armature (or primary) supply
106  DF  .~.~ Diverse sources
107  DF  .~.~.~ A.C. and D.C.
108  DF  .~.~.~.~ Different voltages
109  DF  .~.~.~ Different voltages
110  DF  .~.~.~ Different frequencies
111  DF  .~ Series-parallel connected motors
112  DF  .~ Parallel connected motors
113  DF  .~ Series connected motors
114  DF  IMPACT, MECHANICAL SHOCK, OR VIBRATION-PRODUCING MOTORS
115  DF  MOTOR WITH DIVERSE MOTIONS (E.G., ROTARY AND RECIPROCATING)
116  DF  NONMAGNETIC MOTOR
117  DF  .~ Thermoelectric motor
118  DF  MAGNETOSTRICTIVE MOTOR
119  DF  RECIPROCATING OR OSCILLATING MOTOR
120  DF  .~ Stopping after predetermined number of reciprocations or cycles (including single cycle)
121  DF  .~ Having means to produce a progressing or traveling motor field flux
122  DF  .~ Plural, diverse or diversely controlled motor windings
123  DF  .~.~ Polyphase or diverse or diversely controlled sources of motor supply
124  DF  .~.~.~ A.C. and D.C. sources
125  DF  .~.~ Unidirectionally conductive devices in energizing circuit
126  DF  .~ Energizing winding circuit control
127  DF  .~.~ Automatic in response to predetermined position, movement or condition in or of the motor or driven device
128  DF  .~.~.~ Noise, sound, vibration, movement or position of motor
129  DF  .~.~ By means for producing periodic electrical pulses in the energizing circuit
130  DF  .~.~.~ Electrical oscillation or condenser charging and/or discharging circuits
131  DF  .~.~.~ Motor or escapement-controlled means
132  DF  .~.~ By space-discharge or unidirectionally conductive devices in energizing circuit
133  DF  .~.~ By impedance devices in energizing circuit
134  DF  .~.~ By circuit making and/or braking devices
135  DF  LINEAR-MOVEMENT MOTORS
136  DF  AUXILIARY MEANS FOR PRODUCING MECHANICAL STARTING OR ACCELERATING TORQUE
137  DF  .~ By auxiliary motor
138  DF  SPACE-DISCHARGE-DEVICE COMMUTATED MOTOR
139  DF  BATTERY-FED MOTOR SYSTEMS
140  DF  GENERATOR-FED MOTOR SYSTEMS HAVING GENERATOR CONTROL
141  DF  .~ Automatic generator control and/or with time-delay means
142  DF  .~.~ Responsive to diverse conditions or with time-delay means
143  DF  .~.~.~ Plural electrical conditions
144  DF  .~.~ Armature or primary current of motor
145  DF  .~.~ Terminal voltage or counter e.m.f. of motor
146  DF  .~.~ Speed of motor or driven device
147  DF  .~.~ Speed or frequency of generator or its drive means
148  DF  .~ Alternating-current-motor system
149  DF  .~ With plural, diverse or diversely controlled generators
150  DF  .~ With flywheel on generator or on motor
151  DF  .~ Control of both the generator and the circuit to the motor
152  DF  .~.~ With motor control
153  DF  .~ Control of both the generator and the motor
154  DF  .~.~ Control of excitation (field) circuit of both
156  DF  .~ Plural, diverse or diversely actuated, generator control means
157  DF  .~ Generator speed control
158  DF  .~ Generator field circuit control
159  DF  HAVING ROTOR ELEMENT BIASED AGAINST ROTATION
160  DF  .~ By resilient biasing means (e.g., spring)
161  DF  WITH FLYWHEEL OR MASSIVE ROTARY MEMBER
162  DF  CONTROL BY PATTERNS OR OTHER PREDETERMINED SCHEDULE MEANS
163  DF  .~ Motor running-speed control
164  DF  .~.~ Cyclically varying or repeated speed schedules
700  DF  SYNCHRONOUS MOTOR SYSTEMS
701  DF  .~ Hysteresis or reluctance motor systems
702  DF  .~ Antihunting or damping
703  DF  .~ Braking
704  DF  .~ Pole changing motor winding circuits
705  DF  .~ Synchronization systems
706  DF  .~.~ With armature power removal upon failure to synchronize or loss of synchronism
707  DF  .~.~.~ Upon failure to resynchronize
708  DF  .~.~.~ Responsive to thermal electrical element in system
709  DF  .~.~ Having different armature voltage prior to synchronism
710  DF  .~.~ With d.c. field removal
711  DF  .~.~.~ With electronic control element in system
712  DF  .~.~ With field excitation application
713  DF  .~.~.~ Responsive to slip voltage frequency in d.c. field winding
714  DF  .~.~.~ Responsive to armature current
715  DF  .~.~.~ Responsive to rotor speed or rotor driven member
716  DF  .~ Field winding circuits
717  DF  .~.~ Responsive to a motor condition
718  DF  .~.~.~ Induced voltage in field winding
719  DF  .~.~.~ Speed responsive field power sources
720  DF  .~ Armature winding circuits
721  DF  .~.~ Responsive to rotor shaft position or speed
722  DF  .~.~ Having electronic power conversion circuit
723  DF  .~.~ Having variable frequency supply
724  DF  .~.~ Having a plurality of windings or winding portions
725  DF  REPULSION MOTOR SYSTEMS
726  DF  .~ With added motor winding or convertible to series motor
727  DF  INDUCTION MOTOR SYSTEMS
728  DF  .~ Repulsion start
729  DF  .~ Power-factor control
730  DF  .~ With plural separately movable rotors
731  DF  .~ With voltage source connected to motor secondary
732  DF  .~.~ Electronic device controls current in secondary circuit
733  DF  .~.~ Commutator connected to secondary winding
734  DF  .~.~ Slip rings connected to secondary winding
735  DF  .~.~.~ Rotor shaft coupled to dynamoelectric machine
736  DF  .~.~.~.~ Slip rings connected to dynamoelectric machine winding
737  DF  .~ Self-cascaded motor windings
738  DF  .~ With commutated winding
739  DF  .~ Reversing
740  DF  .~.~ With diverse motor operation
741  DF  .~.~.~ With braking
742  DF  .~.~.~.~ Electromagnetic brakes
743  DF  .~.~.~.~.~ Generator action
744  DF  .~.~.~.~.~ Plugging
745  DF  .~.~ With controlled saturable reactor in primary circuit
746  DF  .~.~.~ Two phase motor
747  DF  .~.~ Two phase motor
748  DF  .~.~.~ With plural primary windings or winding portions having common connection
749  DF  .~.~ Operating from a single phase source
750  DF  .~.~.~ Shaded pole motor
751  DF  .~.~.~ Split phase motor with capacitor interchangeably connected in series with either primary winding
752  DF  .~.~.~.~ With controlled electronic device to provide the series connection
753  DF  .~.~.~ With de-energizable start winding
754  DF  .~.~.~.~ With separate winding or winding portion energized for each direction of rotation
755  DF  .~.~.~.~ Automatic current reversal on start winding
756  DF  .~.~ With controlled electronic switch for phase reversal
757  DF  .~ Braking
758  DF  .~.~ With diverse operation
759  DF  .~.~ Dynamic braking
760  DF  .~.~.~ Direct current primary winding braking circuit
761  DF  .~.~.~.~ Rotating rotor controls braking current in primary winding
762  DF  .~.~.~.~ With a.c. to d.c. conversion circuit
763  DF  .~.~ Reversal of power to primary winding
764  DF  .~.~.~ Three phase power reversal
765  DF  .~.~ Eddy current braking circuits
766  DF  .~ Primary and secondary circuits
767  DF  .~ Primary circuit control
768  DF  .~.~ Three phase motor operated from single phase source
769  DF  .~.~.~ With dynamoelectric converter
770  DF  .~.~ Dual voltage motors
771  DF  .~.~ Delta-wye, plural wye, or plural delta connected primary windings
772  DF  .~.~ Plural speed
773  DF  .~.~.~ Pole changing
774  DF  .~.~.~.~ Single phase motor
775  DF  .~.~.~.~.~ Separate primary running winding for each pole number, alternately energized
776  DF  .~.~.~.~.~ Entire primary running winding energized for each running speed
777  DF  .~.~.~.~ Separate primary running winding for each pole number, alternately energized
778  DF  .~.~ Starting control
779  DF  .~.~.~ With speed control
780  DF  .~.~.~ Three phase motor with variable transformer to initially adjust voltage to motor windings
781  DF  .~.~.~ Operating from a single phase source
782  DF  .~.~.~.~ With protective features
783  DF  .~.~.~.~.~ Thermal starting and thermal overload protection
784  DF  .~.~.~.~ Impedance for reducing current during starting operation
785  DF  .~.~.~.~ Start winding removed during running operation
786  DF  .~.~.~.~.~ By electronic switch
787  DF  .~.~.~.~.~.~ With transformer for sensing the run winding current
788  DF  .~.~.~.~.~.~ With variable temperature coefficient resistor in switch control circuit
789  DF  .~.~.~.~.~ By electromagnetic switch
790  DF  .~.~.~.~.~.~ With relay coil in series with main winding
791  DF  .~.~.~.~.~ By thermal switch
792  DF  .~.~.~.~.~.~ With variable temperature coefficient impedance element
793  DF  .~.~.~.~.~ By centrifugal switch
794  DF  .~.~.~.~ Capacitor run motor with different capacitance at starting
795  DF  .~.~.~.~.~ With plural capacitors
796  DF  .~.~.~.~ Saturable winding in capacitor run motor circuit
797  DF  .~.~.~.~ Phase splitting using stator winding mutual inductance or saturable winding
798  DF  .~.~ Responsive to motor condition
799  DF  .~.~.~ Responsive to speed or rotation phase angle
800  DF  .~.~.~.~ With controlled power conversion
801  DF  .~.~.~.~.~ Including inverter
802  DF  .~.~.~.~.~.~ Responsive to an additional condition
803  DF  .~.~.~.~.~.~.~ With controlled a.c. to d.c. circuit in inverter supply
804  DF  .~.~.~.~ With controlled magnetic reactance
805  DF  .~.~.~ Responsive to motor voltage
806  DF  .~.~ Condition responsive
807  DF  .~.~ Frequency control
808  DF  .~.~.~ With voltage magnitude control
809  DF  .~.~.~ With voltage phase angle control
810  DF  .~.~.~ With voltage pulse time control
811  DF  .~.~.~.~ Pluse width modulation or chopping
812  DF  .~.~ Voltage control
813  DF  .~.~.~ With transformer
814  DF  .~.~.~ With impedance control
815  DF  .~.~.~.~ Saturable reactor
816  DF  .~.~.~ Single phase, split phase motors
817  DF  .~.~.~.~ With capacitor
818  DF  .~ Secondary circuit control
819  DF  .~.~ Open secondary member or portion thereof with means to open or close the circuit thereto
820  DF  .~.~ Closed secondary member or member portion with means to change electrical characteristics thereof
821  DF  .~.~ Impedance control of secondary circuit
822  DF  .~.~.~ Responsive to motor condition
823  DF  .~.~.~.~ Rotor speed or position responsive
824  DF  .~.~.~.~.~ Centrifugal force of rotor controls secondary circuit impedance
825  DF  .~.~.~.~ Induction motor current
826  DF  .~.~.~.~.~ Primary motor current
827  DF  .~.~.~.~ Frequency of secondary current
828  DF  .~.~.~.~ Secondary voltage
829  DF  .~.~.~ By manual operation
830  DF  .~ With relatively movable cooperating motor parts to control energized motor
831  DF  .~.~ Axially movable cooperating parts
832  DF  .~.~ Dual stators, one or both angularly movable
244  DF  ALTERNATING CURRENT COMMUTATING MOTORS
245  DF  .~ Universal or A.C.-D.C. motors
246  DF  SERIES MOTORS
247  DF  .~ Convertible for nonseries motor operation
248  DF  .~ With plural, diverse or diversely connected or controlled sources of e.m.f.
249  DF  .~ Control by motor circuit impedance
250  DF  .~.~ Impedance in series with field windings and in parallel to armature winding
251  DF  .~ Field circuit control
252  DF  .~.~ Plural, diverse or diversely connected or controlled field coils
253  DF  HOMOPOLAR OR UNIFORM FIELD MOTORS
254  DF  SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS
255  DF  PLURAL DIVERSE MOTOR CONTROLS
256  DF  .~ Motor-reversing
257  DF  .~.~ With running-speed control
258  DF  .~.~.~ And braking
259  DF  .~.~.~.~ And acceleration control
260  DF  .~.~.~ And acceleration control
261  DF  .~.~ With braking
262  DF  .~.~.~ And acceleration control
263  DF  .~.~ With acceleration control
264  DF  .~.~ With automatic starting and/or stopping
265  DF  .~.~.~ Stopping upon predetermined movement of or position of motor or driven device
266  DF  .~.~.~.~ At limit-of-travel of motor or driven device
267  DF  .~.~.~.~.~ Dual control circuits alternately energized
268  DF  .~ Running-speed control
269  DF  .~.~ With braking
270  DF  .~.~.~ And acceleration control
271  DF  .~.~ With acceleration control
272  DF  .~.~ With automatic starting and/or stopping
273  DF  .~ Motor braking
274  DF  .~.~ With acceleration control
275  DF  .~.~ With automatic starting and/or stopping
276  DF  .~ Acceleration control
277  DF  .~.~ With automatic starting and/or stopping
278  DF  .~.~.~ In response to an electrical condition
279  DF  .~.~.~.~ Automatic stopping means less responsive during acceleration
280  DF  MOTOR-REVERSING
281  DF  .~ Periodic- or intermittent-reversing
282  DF  .~.~ In response to movement or position (e.g., limit of travel) of motor or driven device
283  DF  .~ Automatic and/or with time-delay means
284  DF  .~.~ With means to delay reversing until motor substantially stops
285  DF  .~.~ Instant of, or passage or predetermined time or having time-delay means
286  DF  .~.~ Movement or position of motor or driven device
287  DF  .~ Armature or primary circuit control
288  DF  .~.~ Plural, diverse or diversely controlled armature windings
289  DF  .~.~.~ Phase-reversal
290  DF  .~.~.~ Selectively energized windings
291  DF  .~.~ Armature or primary current reversal
292  DF  .~.~.~ By shifting motor brushes or selecting appropriate set of brushes
293  DF  .~.~.~ Reversing polarity of current supplied to armature circuit
294  DF  .~.~.~.~ Wheatstone bridge type
295  DF  .~.~.~.~ Potentiometer-controlled
296  DF  .~ Field circuit control
297  DF  .~.~ Plural, diverse or diversely controlled field windings
298  DF  .~.~.~ Simultaneous energization
299  DF  .~.~.~.~ With means for short-circuiting a winding
300  DF  .~.~ Field-circuit current reversed
362  DF  BRAKING
363  DF  .~ "Spotting" or adjustment of braking controller during coasting
364  DF  .~ Automatic and/or with time-delay means
365  DF  .~.~ Plural diverse conditions or with time delay
366  DF  .~.~ Condition of motor or driven device
367  DF  .~.~.~ Armature or primary current
368  DF  .~.~.~ Armature or primary circuit voltage or terminal or counter e.m.f. voltage
369  DF  .~.~.~ Speed, acceleration, movement or position of motor or driven device
370  DF  .~ Plural, diverse or diversely controlled braking means
371  DF  .~.~ Including both friction braking "plugging" and/or dynamic braking
372  DF  .~ Friction braking
373  DF  .~ "Plugging" or application of reverse power to motor
374  DF  .~.~ Energy flow interrupted when motor stops
375  DF  .~ Dynamic braking
376  DF  .~.~ Regenerative
377  DF  .~.~.~ With additional source of e.m.f.
378  DF  .~.~.~.~ In series with armature or primary circuit
379  DF  .~.~ Locally closed armature circuit
380  DF  .~.~.~ Closed through impedance or the like
381  DF  .~.~.~ With field or secondary circuit control
382  DF  .~ By auxiliary electric generator or by magnetic attraction or repulsion devices
383  DF  "ANTI-BRAKING" OR BRAKING-PREVENTION MEANS
430  DF  MOTOR LOAD, ARMATURE CURRENT OR FORCE CONTROL DURING STARTING AND/OR STOPPING
431  DF  .~ Initial, "cracking" or "starting from rest" torque control
432  DF  CONSTANT MOTOR CURRENT, LOAD AND/OR TORQUE CONTROL
433  DF  .~ Control of motor load or device driven
434  DF  LIMITATION OF MOTOR LOAD, CURRENT, TORQUE OR FORCE (E.G., PREVENTING OVERLOAD)
436  DF  NONRUNNING, ENERGIZED MOTOR
437  DF  PHASING OR ANGULAR OR LINEAR POSITIONAL CONTROL OF MOVABLE ELEMENT OF THE MOTOR
438  DF  POWER FACTOR CONTROL OF ARMATURE OR LINE CIRCUIT
439  DF  MOTOR COMMUTATION CONTROL SYSTEMS
440  DF  HAVING PLURAL, DIVERSE OR DIVERSELY CONTROLLED SOURCES
441  DF  .~ A.C. and D.C.
442  DF  .~ Different voltages
443  DF  PERIODIC, REPETITIOUS OR SUCCESSIVE OPERATIONS CONTROL OF MOTOR, INCLUDING "JOG" AND "INCH" CONTROL
444  DF  .~ Variable periods or intervals between controlling operations
445  DF  AUTOMATIC AND/OR WITH TIME-DELAY MEANS (E.G., AUTOMATIC STARTING AND/OR STOPPING)
446  DF  .~ With nonautomatic control means (e.g., manual)
447  DF  .~ Nonresponsive or less responsive for limited periods
448  DF  .~ Anti-hunting
449  DF  .~ With respect to a fixed standard, master or reference device
450  DF  .~.~ Electrical detector
451  DF  .~.~ Mechanically vibrating device as reference device (e.g., tuning fork)
452  DF  .~ Plural, diverse conditions or with time-delay means
453  DF  .~.~ Electrical condition
454  DF  .~.~.~ Plural, diverse electrical conditions
455  DF  .~.~.~.~ Voltage and current (e.g., watts)
456  DF  .~ Rate-of-change of a condition
457  DF  .~.~ Interia-type detector
458  DF  .~.~ Electrical condition
459  DF  .~ Terminal voltage or counter-electromotive force of controlled motor
460  DF  .~ Sound, supersonic vibration or mechanical vibration
461  DF  .~ Speed or rate-of-movement
462  DF  .~.~ Centrifugal-type detector
463  DF  .~.~ Tachometer-type detector
464  DF  .~.~.~ Electric generator tachometer
465  DF  .~.~ In excess of a predetermined valve
466  DF  .~ Movement, position, or limit-of-travel
467  DF  .~.~ Plural sensing means for determining plural positions or plural limits-of travel
468  DF  .~.~ Limit-of-travel control means
469  DF  .~.~.~ Overloading limit-of-travel-type control means
470  DF  .~.~ Magnitude of movement or revolutions
471  DF  .~ Responsive to thermal conditions
472  DF  .~.~ Of motor control means
473  DF  .~.~ In or about the motor being controlled
474  DF  .~ Motor load, armature or primary or secondary circuit current
475  DF  .~.~ Mechanical-type detector (e.g., by yielding spring devices)
476  DF  .~.~ In excess of a predetermined magnitude
477  DF  .~.~.~ Intentionally increased load
478  DF  .~ Electrical conditions in circuit other than controlled motor circuit
479  DF  .~.~ Voltage
480  DF  .~ Radiant energy
481  DF  .~ Pressure in a fluid or granular material
482  DF  .~ Level of fluid or granular material
483  DF  .~ Moisture content or wetness
484  DF  .~ Time or with time-delay means
485  DF  .~.~ Dash-pot or other mechanical delay means
486  DF  .~.~ Pilot- or servo-motors
487  DF  .~.~ Electromagnetic or inductive time-delay means
488  DF  .~ Responsive to stress in body or material
489  DF  .~ Responsive to direction, inclination or angular position of bodies
490  DF  WITH SIGNALS, METERS, RECORDERS OR TESTING DEVICES
491  DF  CONTROL OF BOTH MOTOR CIRCUIT AND MOTOR STRUCTURE
492  DF  MOTOR MAGNETIC ENERGY DISSIPATION
493  DF  CONTROL OF BOTH ARMATURE (OR PRIMARY) CIRCUIT AND FIELD (OR SECONDARY) CIRCUIT
494  DF  ARMATURE (OR PRIMARY) CIRCUIT CONTROL
495  DF  .~ Plural, diverse or diversely controlled, armature or primary windings
496  DF  .~.~ Polyphase windings
497  DF  .~.~ Series-parallel
498  DF  .~.~ Energized or controlled in predetermined sequence
499  DF  .~.~ Wound or energized in magnetic opposition
500  DF  .~ Plural sources of voltage (including counter e.m.f. cells)
501  DF  .~ By shunting armature or primary winding
502  DF  .~ Variable length or tapped armature winding
503  DF  .~ Frequency or pulsation control
504  DF  .~ Voltage control
505  DF  .~ By means to space-discharge devices
506  DF  .~.~ Plural, diverse or diversely connected or controlled space-discharge devices
507  DF  .~.~ Having discharge-control means (e.g., grids)
508  DF  .~ Impedance-controlled
509  DF  .~.~ Plural, diverse or diversely controlled impedances
510  DF  .~.~.~ Including both reactor and condenser
511  DF  .~.~ Inherently or self-variable impedance
512  DF  .~.~ Inductive reactor controlled
513  DF  .~.~.~ Having auxiliary means for saturating reactor core
514  DF  .~.~ Resistor-controlled
515  DF  .~.~.~ Having short-circuiting means
516  DF  .~.~.~.~ Short-circuited step-by-step
519  DF  .~ By armature or primary circuit-making and/or breaking
520  DF  .~.~ Electromagnetically actuated
521  DF  FIELD OR SECONDARY CIRCUIT CONTROL
523  DF  .~ Plural, diverse or diversely connected or controlled field windings
524  DF  .~.~ Convertible number-of-poles type (e.g., 4-pole or 6-pole)
525  DF  .~.~ Differentially wound or energized windings
526  DF  .~.~ Series-parallel
527  DF  .~.~ Series field winding
528  DF  .~.~ With means to short circuit a field winding
529  DF  .~.~ Selectively energized
530  DF  .~ Plural, diverse or diversely connected or controlled sources of field circuit voltage
531  DF  .~ Variable length or tapped field winding
532  DF  .~ By means of space-discharge device in field circuit
533  DF  .~ Impedance-controlled
534  DF  .~.~ Plural, diverse or diversely connected or controlled field circuit impedances
535  DF  .~.~.~ Wheatstone bridge
536  DF  .~ By field circuit making and/or breaking
537  DF  .~.~ Intermittently operated
538  DF  MOTOR STRUCTURE ADJUSTMENT OR CONTROL
539  DF  .~ Both armature and field structures rotatable or adjustable
540  DF  .~ Rotor element movable axially
541  DF  .~ Brush or other current-collector control
542  DF  .~.~ Having movement toward or from cooperating part (e.g., brush lifted from commutator)
543  DF  THREE-OR-MORE-POSITIONS MOTOR CONTROLLER SYSTEMS
544  DF  .~ With other motor control device
545  DF  .~.~ Main line switch
546  DF  .~ Plural, diverse or diversely controlled controllers
547  DF  .~.~ Plural control stations
548  DF  .~ Plural control stations
549  DF  .~ Return to "off", "starting" or "neutral" positions
550  DF  .~.~ Power-operated controllers
551  DF  .~ Knee- or foot-operated controllers
552  DF  .~ Power-actuated controllers
553  DF  .~.~ Separately actuated controller contacts
554  DF  .~.~.~ Electromagnetic actuated
555  DF  .~.~ Electromagnetic actuated
556  DF  .~.~.~ Reciprocating or oscillating electromagnetic means
557  DF  .~.~.~ Intermittent or step-by-step operation
558  DF  MISCELLANEOUS
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DIGEST
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DIG 2  DD  Windshield wiper controls