| Class 246 | RAILWAY SWITCHES AND SIGNALS |
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![[List of Pre Grant Publications for class 246 subclass 1R]](../as.gif) | ![[List of Patents for class 246 subclass 1R]](../ps.gif) | 1R | MISCELLANEOUS |
| | 2R | TRAIN DISPATCHING |
| | 3 |  Central signal control |
| | 6 | Train-order cab signal or train control |
| | 7 | Train telegraphy or telephony |
| | 14 | Station, block, or train-order signals |
| | 2E | Orientation |
| | 2F | Frequency |
| | 2S | Spacing |
| | 19 | STAFF AND TABLET SYSTEMS |
| | 20 | BLOCK-SIGNAL SYSTEMS |
| | 21 | Semi-automatic |
| | 27 | Automatic |
| | 28R |  Electric |
| | 29R |  Radiant energy |
| | 31 | Propulsion-current control |
| | 33 | Single track |
| | 34R | Varying-current track circuit |
| | 35 |  Propulsion-current return |
| | 38 | Wireless distant control |
| | 39 | Line-wire distant control |
| | 40 | Single block |
| | 34A | Approach control |
| | 34B | Coded circuits |
| | 34C | Insulation breakdown |
| | 34D | Saturable reactors |
| | 34CT | Continuous track |
| | 41 | Direct current, normally closed, track circuit |
| | 42 | Propulsion-current return |
| | 44 | Wireless distant control |
| | 46 | Line-wire distant control |
| | 47 |  Cab signal or train control |
| | 50 | Current characteristic |
| | 51 | Overlapped blocks |
| | 52 | Home and distant |
| | 53 | Three position |
| | 54 | Single block |
| | 58 | Direct-current, normally open, track circuit |
| | 61 | Superimposed propulsion current |
| | 62 | Cab signal or train control |
| | 63R | Inductive |
| | 64 | Train-carried current supply |
| | 72 | Propulsion-current signaling |
| | 73 | Continuous contact |
| | 74 | Intermittent contact |
| | 75 | Bridged insulated rail joint |
| | 76 | Track trip |
| | 77 | Counting in and out |
| | 81 | Propulsion-current signaling |
| | 86 | Train-carried current supply |
| | 87 | Line-current supply |
| | 88 | Intermediate signal |
| | 89 | Short sectional rail closure |
| | 90 | Car-actuated controller |
| | 92 | Intermittent contact |
| | 28C | Ballast leakage |
| | 28E | Economy use of line wire |
| | 28F | Checking circuits |
| | 28G | Light-out |
| | 28H | Intermittent light |
| | 28K | Transformer |
| | 93 | Combined fluid pessure and electric |
| | 96 | Electromechanical |
| | 100 | Fluid pressure |
| | 102 | Mechanical |
| | 104 | Manual |
| | 107 | Recorders |
| | 108 | TIME INDICATION, AUTOMATIC |
| | 111 | GRADE-CROSSING TRACK PROTECTION |
| | 118 | DRAWBRIDGE PROTECTION |
| | 120 | ROADWAY-DEFECT PROTECTION |
| | 122R | TRAIN-POSITION INDICATION |
| | 125 | ELECTRIC AUTOMATIC HIGHWAY SIGNALS, MINE DOORS, AND GATES |
| | 131 | INTERLOCKING |
| | 132 | Electric actuation |
| | 139 | Fluid-pressure actuation |
| | 143 | Manual actuation |
| | 159 | Detached locking, check locking, or key control |
| | 160 | Approach locking |
| | 161 | Retarded-release mechanism |
| | 162 | Switch or signal indicators |
| | 163 | Derails |
| | 164 | SLOTTING AND CONTROL |
| | 166 | PILOT OR SIGNAL CARS |
| | 166.1 | SIGNALLING BETWEEN OCCUPANTS OF A TRAIN |
| | 167R | CAB SIGNAL OR TRAIN CONTROL |
| | 168 | Train parting |
| | 168.1 | Wheel slip |
| | 169R | Train defect |
| | 170 | Derailment |
| | 174 | Highway or station, automatic |
| | 176 | Switch signals |
| | 177 | Block entrance initiated |
| | 182R | Speed-control systems |
| | 182A | Track brake speed control |
| | 182B | Automatic vehicle-carried braking |
| | 182BH | Humped, unpowered cars |
| | 182C | Automatic vehicle-carried speed comparison circuits |
| | 182AA | Yard-switching, dispersed |
| | 182AB | Yard-switching, centralized |
| | 183 | Manual-control systems |
| | 184 | Service stop |
| | 185 | Recording devices |
| | 186 | Motive-power control |
| | 187R | Electric |
| | 187A | Remote control |
| | 187B | Non-mechanical control of vehicles from wayside |
| | 187C | Control of vehicle from leading vehicle |
| | 188 | Fluid-pressure-actuated throttle |
| | 189 | Engineer's brake-valve actuation |
| | 190 | Train-pipe-valve structure |
| | 191 | Visual cab signals |
| | 192R | Train mechanism |
| | 193 | Electric or magnetic |
| | 198 | Single-direction actuation |
| | 199 | Frangible |
| | 200R | Lever actuated |
| | 200A | Lever perpendicular inclined less than 45 degree |
| | 200B | Lever transverse relative to direction of travel |
| | 192A | Train-carried electric contact mechanism |
| | 201 | Track trips |
| | 202 | Electric or magnetic |
| | 203R | Pivoted |
| | 203A | Single vertical pivot on which track trip turns |
| | 203B | Single vertical pivot; strike rod transverse of track |
| | 203C | Single horizontal pivot on which track trip turns |
| | 203D | Single horizontal pivot; strike rod transverse of track |
| | 203E | Horizontal pivot, vertical rod, strike rod perpendicular |
| | 204 | Vertical motion |
| | 205 | Lateral motion |
| | 206 | Fixed |
| | 207 | Portable |
| | 167A | Train approach warning for work cars |
| | 167M | Magnetic rail |
| | 167D | Vehicle-vehicle distance measuring |
| | 208 | CAR-DISPLAYED CROSSING SIGNALS |
| | 209 | PASSENGERS' STATION SIGNALS |
| | 210 | TORPEDO MECHANISM |
| | 217 | AUDIBLE SWITCH AND SIGNAL INDICATORS |
| | 218 | ELECTRIC ACTUATION |
| | 219 | Control circuits |
| | 220 | Switch signals |
| | 221 | Motor systems |
| | 222 | Return-indication-current generation |
| | 223 | Three-position signals |
| | 224 | Home and distant signals |
| | 225 | Reciprocating armature |
| | 226 | Controller-actuated switches |
| | 231 | Opposed magnets |
| | 236 | Alternate throw |
| | 237 | Fly-back |
| | 240 | Rotary armature |
| | 245 | Car-actuated generators |
| | 246 | Car-actuated circuit controllers |
| | 247 | Wheel or train counting |
| | 248 | Retarded action |
| | 249 | Electric or magnetic |
| | 250 | Single-direction actuation |
| | 251 | Vertically sprung rail |
| | 252 | Trolley or plow actuated |
| | 253 | Switch or signal actuated controllers |
| | 254 | Trolley-completed circuits |
| | 255 | Car-wheel-completed circuits |
| | 256 | Relays |
| | 257 | FLUID-MOTOR ACTUATION |
| | 262 | MECHANICAL-MOTOR ACTUATION |
| | 264 | POINT THROWERS |
| | 270R | VEHICLE-ENERGY ACTUATION |
| | 271 | Fluid transmission |
| | 273 | Continuous-rail crossings |
| | 274 | Switch-connected frogs |
| | 275 | Continuous-rail frogs |
| | 277 | Automatic turnouts |
| Switch stands, automatic |
| | 292 | Signals and gates, automatic |
| | 293 | Highway crossing |
| | 297 | Track mechanism |
| | 314 | Switches, automatic |
| | 315 | Resetting, vehicle restrained |
| | 316 | Wheel resetting |
| | 317 | Facing setting |
| | 318 | Trailing setting |
| | 319 | Trailing fly-back |
| | 322 | Track mechanism |
| | 323 | Selective |
| | 324 | Latch or clutch release |
| | 326 | Electric control |
| | 327 | Alternate throw |
| | 329 | Three and multiple throw |
| | 330 | Traffic protected |
| | 331 | Rotary longitudinal connecting shaft |
| | 332 | Cable and pulley connection |
| | 333 | Longitudinal sprial cam |
| | 334 | Rack and pinion |
| | 335 | Bow spring |
| | 336 | Longitudinal motion |
| | 337 | Train-trip elevation |
| | 338 | Track-mechanism depression |
| | 339 | Perpendicular swing |
| | 341 | Horizontal swing |
| | 344 | Transverse motion |
| | 358 | Switch locks, automatic |
| | 359 | Train trips |
| | 360 | Electric or magnetic |
| | 361 | Fluid pressure |
| | 362 | Resilient |
| | 363 | Hooks |
| | 364 | Racks or friction bars |
| | 365 | Pivoted |
| | 368 | Vertical motion |
| | 371 | Lateral motion |
| | 270A | Automatic switch actuation from or by vehicle |
| | 374 | SAFETY SIDINGS |
| | 375 | CONTINUOUS-RAIL CROSSING |
| | 382 | SWITCH-CONNECTED FROGS |
| | 383 | Overlapped main |
| | 385 | Swinging tongue |
| | 387 | End-pivoted rail |
| | 388 | Center-pivoted rail |
| | 389 | Swinging rail |
| | 392 | Transversely sliding rail |
| | 393 | SWITCH STANDS |
| | 394 | Cab signal or train control |
| | 395 | Resetting |
| | 396 | Latch release, automatic |
| | 397 | Hand restrained |
| | 398 | Vehicle restrained |
| | 399 | Detention devices |
| | 400 | Key retaining |
| | 401 | Rail lock and position indication |
| | 403 | Three and multiple throw |
| | 404 | Adjustable throw |
| | 405 | Spiral-cam actuated |
| | 406 | Gear actuated |
| | 407 | Structural types |
| | 415R | SWITCHES |
| | 416 | Slip |
| | 417 | Frog obviating |
| | 419 | Conduit, third rail or trolley |
| | 420 | Nonderailing, trailing |
| | 423 | Facing, rerailing |
| | 424 | Facing, selective |
| | 427 | Stationary turnout |
| | 428 | Snow protected |
| | 429 | Overlap |
| | 430 | Sliding |
| | 431 | Oscillating, longitudinal axis |
| | 432 | Risers |
| | 433 | Vertical motion |
| | 434 | Flexible rail |
| | 435R | Point |
| | 436 | Recessed rail |
| | 437 | Renewable and reenforced |
| | 438 | Point and mate |
| | 439 | Tandem |
| | 440 | Three throw |
| | 441 | Tread guard rail |
| | 442 | Tongue |
| | 435A | Guard |
| | 445 | Stub |
| | 448 | Lock |
| | 449 | Tie bars |
| | 452 | Connecting rods |
| | 453 | Chairs and plates |
| | 415A | Toy |
| | 454 | CROSSINGS, FROGS, AND MATES |
| | 455 | Outer-tread-supported wheel |
| | 456 | Tread guard rail |
| | 457 | Flange-supported wheel |
| | 459 | Hot filled |
| | 460 | Central inserts |
| | 462 | Plate or plate bolted |
| | 463 | Bolted |
| | 464 | Solid |
| | 465 | Crossings |
| | 468 | Frogs |
| | 472 | Details |
| | 473R | SIGNALS |
| | 473.1 | Highway crossing |
| | 473.3 | Light beam projecting |
| | 474 | Track reflectors |
| | 475 | Dwarf or pot |
| | 476 | Switch or switch stand |
| | 477 | Roadway, visual, and portable |
| | 478 | Enclosed |
| | 479 | Semaphore |
| | 486 | Bridge warnings |
| | 487 | Torpedoes |
| | 488 | Trainmens' kits |
| | 473A | Toy rail signals |
| | 489 | MANUAL ACTUATION |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | RADIANT ENERGY DEVICES |
| | DIG2 | THERMAL SENSING DEVICES |