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Class Number: 246
Class Title: RAILWAY SWITCHES AND SIGNALS
Subclass Subclass
Number Title
1 R MISCELLANEOUS
1 A .Asymmetric units
1 C .Signals and indicators
2 R TRAIN DISPATCHING
3 .Central signal control
4 ..Cab signal or train control
5 ..Selective
6 .Train-order cab signal or train control
7 .Train telegraphy or telephony
8 ..Inductive
9 ..Continuous contacts
10 ...Traction rail return
11 ....Multiple contact
12 ...Instruments in series
13 ..Emergency signal stations
14 .Station, block, or train-order signals
15 ..Safety systems
16 ...Holders
17 ..Rotary, vertical axis
18 ..Double semaphore
2 E .Orientation
2 F .Frequency
2 S .Spacing
19 STAFF AND TABLET SYSTEMS
20 BLOCK-SIGNAL SYSTEMS
21 .Semi-automatic
22 ..Electromanual
23 ...Cab signal or train control
24 ...Circuit controllers
25 ...Lock and block
26 ....Track-circuit control
27 .Automatic
28 R ..Electric
29 R ...Radiant energy
30 ....Hertzian wave
29 A ....Electronic gaseous ionization devices
31 ...Propulsion-current control
32 ....Current consumption
33 R ...Single track
33 A ....Speed responsive
34 R ...Varying-current track circuit
35 ....Propulsion-current return
36 .....Double rail
37 ......Impedance bond
38 ....Wireless distant control
39 ....Line-wire distant control
40 ....Single block
34 A ....Approach control
34 B ....Coded circuits
34 C ....Insulation breakdown
34 D ....Saturable reactors
34 CT ....Continuous trackk
41 ...Direct current, normally closed, track circuit
42 ....Propulsion-current return
43 .....Varying
44 ....Wireless distant control
45 .....Current reversal
46 ....Line-wire distant control
47 .....Cab signal or train control
48 ......Bridged insulated rail joint
49 ......Intermittent contact
50 .....Current characteristic
51 .....Overlapped blocks
52 .....Home and distant
53 .....Three position
54 ....Single block
55 .....Cab signal or train control
56 ......Intermittent contact
57 ......Bridged insulated rail joint
58 ...Direct-current, normally open, track circuit
59 ....Cab signal or train control
60 ....Distant-signal control
61 ...Superimposed propulsion current
62 ...Cab signal or train control
63 R ....Inductive
63 C .....Continuous
63 A .....Intermittent
64 ....Train-carried current supply
65 .....Multiple continuous contacts
66 ......Sectional
67 .....Single continuous contact
68 ......Sectional
69 .....Intermittent contact
70 ......Rail circuit
71 ......Rail return
72 ....Propulsion-current signaling
73 ....Continuous contact
74 ....Intermittent contact
75 ....Bridged insulated rail joint
76 ....Track trip
77 ...Counting in and out
78 ....Ratchet wheel
79 .....Double opposed pawls
80 ......Parallel teeth
81 ...Propulsion-current signaling
82 ....Rotary controller
83 ....Car-actuated controller
84 .....Trolley or plow
85 ....Intermittent contact
86 ...Train-carried current supply
87 ...Line-current supply
88 ....Intermediate signal
89 ....Short sectional rail closure
90 ....Car-actuated controller
91 .....Relay
92 ....Intermittent contact
28 C ...Ballast leakage
28 D ...Plural signals
28 E ...Economy use of line wire
28 F ...Checking circuitss
28 G ...Light-out
28 H ...Intermittent light
28 K ...Transformer
93 ..Combined fluid pessure and electric
94 ...Cab signal or train control
95 ...Track-circuit control
96 ..Electromechanical
97 ...Cab signal or train control
98 ...Track-circuit control
99 ...Clockwork
100 ..Fluid pressure
101 ...Cab signal or train control
102 ..Mechanical
103 ...Cab signal or train control
104 .Manual
105 ..Electric
106 ...Lock and block
107 .Recorders
108 TIME INDICATION, AUTOMATIC
109 .Flow retarded
110 .Time limit expired
111 GRADE-CROSSING TRACK PROTECTION
112 .Semi-automatic
113 .Automatic
114 R ..Electric
115 ...Cab signal or train control
114 A ...Cross-over protection
116 ..Fluid pressure
117 .Cab signal or train control
118 DRAWBRIDGE PROTECTION
119 .Cab signal or train control
120 ROADWAY-DEFECT PROTECTION
121 .Electric
122 R TRAIN-POSITION INDICATION
123 .Automatic time recording
124 .Train annunciators or indicators
122 A .Miniature model
125 ELECTRIC AUTOMATIC HIGHWAY SIGNALS, MINE DOORS, AND GATES
126 .Car-actuated controller
127 ..Gates and doors
128 .Normally open track circuit
129 ..Short sectional rail closure
130 .Normally closed track circuit
131 INTERLOCKING
132 .Electric actuation
133 ..Electric locking
134 ...Route locking
135 ...Return-release indication
136 ..Mechanical locking
137 ...Return-release indication
138 ....Locked slide
139 .Fluid-pressure actuation
140 ..Electrically controlled valve
141 ...Return-release indication
142 ..Return-release indication
143 .Manual actuation
..Switch stands
144 ...Signal-actuatingg
145 ....Double lever
146 ..Electrical locking
147 ..Mechanical locking
148 ...Preliminary
149 ....Tappets
150 ...Tappets
151 ...Detector bars
152 ...Compensators
153 ....Counterweight
154 .....Intermittent grip
155 ...Rod-saving devices
156 ....Selectors
157 .....Electric
158 ....Switch and lock movements
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
165 .Electric
166 PILOT OR SIGNAL CARS
166.1 SIGNALLING BETWEEN OCCUPANTS OF A TRAIN
167 R CAB SIGNAL OR TRAIN CONTROL
168 .Train parting
168.1 .Wheel slip
169 R .Train defect
169 A ..Hot bearing detectors
169 D ..Radiant energy type
169 S ..Sound detectors
170 .Derailment
171 ..Contact trips
172 ...Frangible
173 ..Inertia trips
174 .Highway or station, automatic
175 ..Code signal
176 .Switch signals
177 .Block entrance initiated
178 ..Electric or magnetic control
179 ...Bridged insulated rail joint
180 ...Cab-circuit controller
181 ...Mechanical actuation
182 R .Speed-control systems
182 A ..Track brake speed control
182 B ..Automatic vehicle-carried braking
182 BH ..Humped, unpowered cars
182 C ..Automatic vehicle-carried speed comparison circuits
182 AA ..Yard-switching, dispersed
182 AB ..Yard-switching, centralized
183 .Manual-control systems
184 .Service stop
185 .Recording devices
186 .Motive-power control
187 R ..Electric
187 A ...Remote control
187 B ...Non-mechanical control of vehicles from wayside
187 C ...Control of vehicle from leading vehicle
188 ..Fluid-pressure-actuated throttlee
189 .Engineer's brake-valve actuation
190 .Train-pipe-valve structure
191 .Visual cab signals
192 R .Train mechanism
193 ..Electric or magnetic
194 ...Inductive
195 ...Intermittent contact
196 ...Cab-circuit controller
197 ....Magnetically actuated
198 ..Single-direction actuation
199 ..Frangible
200 R ..Lever actuated
200 A ...Lever perpendicular inclined less than 45 degree
200 B ...Lever transverse relative to direction of travel
192 A ..Train-carried electric contact mechanism
201 .Track trips
202 ..Electric or magnetic
203 R ..Pivoted
203 A ...Single vertical pivot on which track trip turns
203 B ...Single vertical pivot; strike rod transverse of track
203 C ...Single horizontal pivot on which track trip turns
203 D ...Single horizontal pivot; strike rod transverse of track
203 E ...Horizontal pivot, vertical rod, strike rod
perpendicular
204 ..Vertical motion
205 ..Lateral motion
206 ..Fixed
207 ..Portable
167 A .Train approach warning for work cars
167 M .Magnetic rail
167 D .Vehicle-vehicle distance measuring
208 CAR-DISPLAYED CROSSING SIGNALS
209 PASSENGERS' STATION SIGNALS
210 TORPEDO MECHANISM
211 .Electric
212 .Magazine
213 ..Vertical
214 ..Rotary
215 .Car attached
216 .Hand placing devices
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
227 ....Opposed magnets
228 .....Circuit changers
229 .....Tandem contacts
230 ....Alternate throw
231 ...Opposed magnets
232 ....Circuit changers
233 ....Tandem contacts, switches
234 ....Parallel contacts, switchess
235 .....Circuit controller
236 ...Alternate throw
237 ...Fly-back
238 ....Latch or clutch release
239 ....Switches
240 ..Rotary armature
241 ...Opposed motors
242 R ...Circuit changers
242 A ....Overload release
242 B ....Dual selector circuit
242 C .....Remote lever, local selector
243 ...Fly-back
244 ....Latch or clutch release
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
258 .Electric control
259 ..Car-controlled switches
260 .Signals
261 .Gates
262 MECHANICAL-MOTOR ACTUATION
263 .Electric control
264 POINT THROWERS
265 .Magnetic
266 .Modifier switch
267 ..Directing-grooves
268 .Wedging wheel
269 .Sliding shoe
270 R VEHICLE-ENERGY ACTUATION
271 .Fluid transmission
272 ..Gates
273 .Continuous-rail crossings
274 .Switch-connected frogs
275 .Continuous-rail frogs
276 ..Spring rail
277 .Automatic turnouts
.Switch stands, automatic
278 ..Facing setting
279 ...Manual control
280 ...Resetting
281 ....Vehicle restrained
282 ...Trailing setting
283 ....Yielding rail
284 ..Trailing setting
285 ...Yielding rail
286 ....Spring-clutch
287 .....Coaxial spring
288 ....Counterweightt
289 ....Frangible
290 ..Trailing fly-back
291 ...Spring actuated
292 .Signals and gates, automatic
293 ..Highway crossing
294 ...Visual and audible
295 ...Audible
296 ....Bells, single stroke
297 ..Track mechanism
298 ...Single direction
299 ...Latch or clutch release
300 ....Electric
301 ....Longitudinal motion
302 ....Vertical motion
303 ...Longitudinal spiral cam
304 ...Vehicle-restrained gates and doors
305 ....Parallel swing
306 ....Longitudinal motion
307 ....Vertical motion
308 .....Swinging
309 ......Yielding rail
310 ...Parallel swing
311 ...Longitudinal motion
312 ....Rectilinear
313 ...Vertical motion
314 .Switches, automatic
315 ..Resetting, vehicle restrained
316 ..Wheel resetting
317 ..Facing setting
318 ..Trailing setting
319 ..Trailing fly-back
320 R ...Spiral spring
321 ....Tie or connecting rod
320 A ....Dash pot
322 ..Track mechanism
323 ...Selective
324 ...Latch or clutch release
325 ....Electric control
326 ...Electric control
327 ...Alternate throw
328 ....Tappet wheel
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
340 .....Double
341 ....Horizontal swing
342 .....Double acting
343 .....Double
344 ...Transverse motion
345 ....Duplex leverr
346 ....Swinging
347 .....Double acting
348 ......Guiding tail
349 .....Double
350 ....Double acting
351 ....Vertical motion
352 .....Duplex lever
353 .....Swinging
354 ......Double acting
355 ......Double
356 .....Double
357 ......Transverse lever connection
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
366 ...Wheel
367 ...Rod
368 ..Vertical motion
369 ...Wheel
370 ...Rod
371 ..Lateral motion
372 ...Wheel
373 ...Rod
270 A .Automatic switch actuation from or by vehicle
374 SAFETY SIDINGS
375 CONTINUOUS-RAIL CROSSING
376 .Overlapped main
377 .Pivoted rail
378 .Rotary block
379 .Movable point
380 .Sliding rail
381 ..Longitudinal
382 SWITCH-CONNECTED FROGS
383 .Overlapped main
384 ..Double rail
385 .Swinging tongue
386 ..Stub end
387 .End-pivoted rail
388 .Center-pivoted rail
389 .Swinging rail
390 ..Opposed swing
391 ..Wing
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
402 ..Transverse rotary locking shaftt
403 .Three and multiple throw
404 .Adjustable throw
405 .Spiral-cam actuated
406 .Gear actuated
407 .Structural types
408 ..Depressed mechanism
409 ..High semaphore stands
410 ..Vertical lever
411 ...Ground stands
412 ..Horizontal lever
413 ...Drop arm
414 ....Automatic key-lock
415 R SWITCHES
416 .Slip
417 .Frog obviating
418 ..Single ral
419 .Conduit, third rail or trolley
420 .Nonderailing, trailing
421 ..Risers
422 ..Moving guard rail
423 .Facing, rerailing
424 .Facing, selective
425 ..Side draft
426 ..Modified wheel
427 .Stationary turnout
428 .Snow protected
429 .Overlap
430 .Sliding
431 .Oscillating, longitudinal axis
432 .Risers
433 .Vertical motion
434 .Flexible rail
435 R .Point
436 ..Recessed rail
437 ..Renewable and reenforced
438 ..Point and mate
439 ..Tandem
440 ..Three throw
441 ..Tread guard rail
442 ..Tongue
443 ...Bed lock
444 ...Self-cleaning
435 A ..Guard
445 .Stub
446 ..Double rail
447 ..Anti-creep or jar
448 .Lock
449 .Tie bars
450 ..Adjustable
451 ...Eccentric
452 .Connecting rods
453 .Chairs and plates
415 A .Toy
454 CROSSINGS, FROGS, AND MATES
455 .Outer-tread-supported wheel
456 .Tread guard rail
457 .Flange-supported wheel
458 ..Frogss
459 .Hot filled
460 .Central inserts
461 ..Cast bound
462 .Plate or plate bolted
463 .Bolted
464 .Solid
465 .Crossings
466 ..Street and steam
467 ..Chairs
468 .Frogs
469 ..Unbroken main
470 ..Clamped
471 ..Composite
472 .Details
473 R SIGNALS
473.1 .Highway crossing
473.2 ..Wigwag type
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
480 ..Upper quadrant
481 ..Home and distant
482 ..Arms
483 ...Illuminated
484 ..Lamp and spectacles
485 ..Post mechanism
486 .Bridge warnings
487 .Torpedoes
488 .Trainmens' kits
473 A .Toy rail signals
489 MANUAL ACTUATION
* ******************************
* DIGESTS
* ******************************
DIG 1 Radiant energy devices
DIG 2 Thermal sensing devices