Manual of recommended practice for railway engineering and maintenance of way (1905)
American Railway Engineering and Maintenance-of-Way Association · Chicago, Ill. : The Association · leaf 146
fl c fi Direct Current Relays, Semaphore Indicator. Direct Current Relays, pole changing.Direct Current Relays, differential. TOWER INDICATORS. Semaphore, Disc. Stop When Energized. 1^ 1 *T Semaphore, Disc. Proceed When Energized. Signal Repeater. Stop or Proceed When Energized. ? ? SIGNALING AND… … ELECTRIC LOCK AND INDICATING CIRCUIT CONTROLLER. For Mechanical Interlocking Machine, Operated fromQuadrant of Lock. 11 Hand Operated. s BATTERY HOUSES. Above Surface.Below Surface.Half Above Surface. 136 SIGNALING AND INTERLOCKING. 9 Track Battery. Battery Chute, Relay Box and Post. Left figure…
Railroad engineering · Railroads
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