US Patent Class 191
ELECTRICITY: TRANSMISSION TO VEHICLES



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Current as of: June, 1999
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  DF  CLASS NOTES
1 R  DF  MISCELLANEOUS
1 A  DF  .~ Electroplating contact rolls
2  DF  SYSTEMS OF DISTRIBUTION
3  DF  .~ Convertible, multiple current source
4  DF  .~.~ Internal and external
5  DF  .~.~ Alternating direct
6  DF  .~ Sectional
7  DF  .~ Alternating-alternating
8  DF  .~ Safety cut-out
9  DF  DRAWBRIDGE AND TRANSFER TABLE
10  DF  MAGNETIC INDUCTION
11  DF  VEHICLE IN SERIES
12 R  DF  FLEXIBLE EXTENSIONS
12.2 R  DF  .~ Reels
12.4  DF  .~.~ With connector plug or receptacle
12.2 A  DF  .~.~ Motor-operated
12 S  DF  .~ Electric iron stands
12 C  DF  .~ Chain protectors
13  DF  PLATE CONDUCTOR
14  DF  SECTIONAL CONDUCTOR
15  DF  .~ Normally live section
*  DD  .~ Normally dead section
16  DF  .~.~ Magnetomechanical circuit controller
17  DF  .~.~ Magnetic circuit controller
18  DF  .~.~.~ Magnet on vehicle
19  DF  .~.~.~.~ Traveling controller
20  DF  .~.~ Mechanical circuit controller
21  DF  .~.~.~ Deformable conductor
22 R  DF  CONDUCTORS
23 R  DF  .~ Conduit
24  DF  .~.~ Asymmetric
25  DF  .~.~ Closing
26  DF  .~.~ Draining
27  DF  .~.~ Heated
28  DF  .~.~ Special modifications
23 A  DF  .~.~ Overhead conduit conductors
29 R  DF  .~ Third rail
30  DF  .~.~ Protected
31  DF  .~.~.~ Closing
32  DF  .~.~ Supports
29 DM  DF  .~.~ Conductor made from different materials
33 R  DF  .~ Trolley
34  DF  .~.~ Nonunderrunning
35  DF  .~.~ Guarded
36  DF  .~.~ Special intersections
37  DF  .~.~ Crossings
38  DF  .~.~ Switches
39  DF  .~.~ Section insulators
40  DF  .~.~ Supports
41  DF  .~.~.~ Catenary
42  DF  .~.~.~ Combined ears and insulator
43  DF  .~.~.~ Ears
44  DF  .~.~.~.~ Splices
44.1  DF  .~.~ Splicers
33 PM  DF  .~.~ Cables made of multiple material
22 C  DF  .~ At or below ground surface
22 DM  DF  .~ Rail, made of multiple materials
45 R  DF  COLLECTORS
46  DF  .~ Convertible
47  DF  .~ Bar
48  DF  .~ Conduit plow
49  DF  .~ Third-rail shoe
50  DF  .~ Trolley
51  DF  .~.~ Common wire passing
52  DF  .~.~ Detachable
53  DF  .~.~ Nonunderrunning
54  DF  .~.~ Indefinite path
55  DF  .~.~.~ Bow
56  DF  .~.~.~ Roller
57  DF  .~.~ Multiple contact
58  DF  .~.~.~ Tandem
59  DF  .~.~ Heads
59.1  DF  .~.~.~ Sliding contact
60  DF  .~.~.~ Swivel
60.1  DF  .~.~.~.~ Center bias
60.2  DF  .~.~.~ Lateral swing
60.3  DF  .~.~.~ Vertical swing
60.4  DF  .~.~.~ Axial slide
60.5  DF  .~.~.~ Pole couplings
61  DF  .~.~.~ Wheel to head contactor
62  DF  .~.~.~ Ice clearers or preventers
63  DF  .~.~.~ Wheels
63.1  DF  .~.~.~.~ Quick release
63.2  DF  .~.~.~.~ Lateral slide
63.3  DF  .~.~.~.~ Universal mount
63.4  DF  .~.~.~.~ Slidable pins
63.5  DF  .~.~.~.~ Pin fasteners
64  DF  .~.~ Poles
65  DF  .~.~.~ Frames
66  DF  .~.~ Stands
67  DF  .~.~.~ Fluid pressure erector
68  DF  .~.~.~ Spring erector
69  DF  .~.~.~.~ Torsion
70  DF  .~.~.~.~ Tension or compression
71  DF  .~.~ Rope protectors
72  DF  .~.~ Guards and finders
73  DF  .~.~.~ Constantly operative
74  DF  .~.~.~.~ Fixed
75  DF  .~.~.~.~ Spiral cam replacer
76  DF  .~.~.~.~ Star wheel
77  DF  .~.~.~ Normally operative
78  DF  .~.~.~.~ Automatic
79  DF  .~.~.~.~ Rope-retracted
80  DF  .~.~.~.~.~ Lateral swing
81  DF  .~.~.~.~.~ Longitudinal swing
82  DF  .~.~.~ Normally inoperative
83  DF  .~.~.~.~ Automatic
84  DF  .~.~.~.~ Rope-actuated
85  DF  .~ Trolley retrievers
86  DF  .~.~ Erector release
87  DF  .~.~.~ Fluid pressure erector
88  DF  .~.~.~ Spring erector
89  DF  .~.~.~.~ Toggle
90  DF  .~.~ Fluid pressure-retracted
91  DF  .~.~ Spring-retracted
92  DF  .~.~.~ Rope-actuated
93  DF  .~.~.~.~ Slack take-up
94  DF  .~.~ Weight-retracted
95  DF  .~ Nonretracting trolley stops
45 A  DF  .~ Suspended conveyors