Railway Switches And Signals Patents (Class 246)
- Electric actuation (Class 246/132)
- Fluid-pressure actuation (Class 246/139)
- Manual actuation (Class 246/143)
- Detached locking, check locking, or key control (Class 246/159)
- Approach locking (Class 246/160)
- Retarded-release mechanism (Class 246/161)
- Switch or signal indicators (Class 246/162)
- Derails (Class 246/163)
- Train parting (Class 246/168)
- Wheel slip (Class 246/168.1)
- Train defect (Class 246/169R)
- Derailment (Class 246/170)
- Highway or station, automatic (Class 246/174)
- Switch signals (Class 246/176)
- Block entrance initiated (Class 246/177)
- Speed-control systems (Class 246/182R)
- Manual-control systems (Class 246/183)
- Service stop (Class 246/184)
- Recording devices (Class 246/185)
- Motive-power control (Class 246/186)
- Engineer's brake-valve actuation (Class 246/189)
- Train-pipe-valve structure (Class 246/190)
- Visual cab signals (Class 246/191)
- Train mechanism (Class 246/192R)
- Track trips (Class 246/201)
- Train approach warning for work cars (Class 246/167A)
- Magnetic rail (Class 246/167M)
- Vehicle-vehicle distance measuring (Class 246/167D)
- Control circuits (Class 246/219)
- Switch signals (Class 246/220)
- Motor systems (Class 246/221)
- Car-actuated generators (Class 246/245)
- Car-actuated circuit controllers (Class 246/246)
- Switch or signal actuated controllers (Class 246/253)
- Trolley-completed circuits (Class 246/254)
- Car-wheel-completed circuits (Class 246/255)
- Relays (Class 246/256)
- Fluid transmission (Class 246/271)
- Continuous-rail crossings (Class 246/273)
- Switch-connected frogs (Class 246/274)
- Continuous-rail frogs (Class 246/275)
- Automatic turnouts (Class 246/277)
- Switch stands, automatic
- Signals and gates, automatic (Class 246/292)
- Switches, automatic (Class 246/314)
- Switch locks, automatic (Class 246/358)
- Train trips (Class 246/359)
- Automatic switch actuation from or by vehicle (Class 246/270A)
- Slip (Class 246/416)
- Frog obviating (Class 246/417)
- Conduit, third rail or trolley (Class 246/419)
- Nonderailing, trailing (Class 246/420)
- Facing, rerailing (Class 246/423)
- Facing, selective (Class 246/424)
- Stationary turnout (Class 246/427)
- Snow protected (Class 246/428)
- Overlap (Class 246/429)
- Sliding (Class 246/430)
- Oscillating, longitudinal axis (Class 246/431)
- Risers (Class 246/432)
- Vertical motion (Class 246/433)
- Flexible rail (Class 246/434)
- Point (Class 246/435R)
- Stub (Class 246/445)
- Lock (Class 246/448)
- Tie bars (Class 246/449)
- Connecting rods (Class 246/452)
- Chairs and plates (Class 246/453)
- Toy (Class 246/415A)
- Outer-tread-supported wheel (Class 246/455)
- Tread guard rail (Class 246/456)
- Flange-supported wheel (Class 246/457)
- Hot filled (Class 246/459)
- Central inserts (Class 246/460)
- Plate or plate bolted (Class 246/462)
- Bolted (Class 246/463)
- Solid (Class 246/464)
- Crossings (Class 246/465)
- Frogs (Class 246/468)
- Details (Class 246/472)
- Highway crossing (Class 246/473.1)
- Light beam projecting (Class 246/473.3)
- Track reflectors (Class 246/474)
- Dwarf or pot (Class 246/475)
- Switch or switch stand (Class 246/476)
- Roadway, visual, and portable (Class 246/477)
- Enclosed (Class 246/478)
- Semaphore (Class 246/479)
- Bridge warnings (Class 246/486)
- Torpedoes (Class 246/487)
- Trainmens' kits (Class 246/488)
- Toy rail signals (Class 246/473A)
