tripcock

English

From trip +‎ cock

tripcock (plural tripcocks)

(rail transport) A train-mounted safety device which interacts with a trackside device to stop a train automatically if it passes a signal at danger (showing a red aspect).
- 2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, pages 136-137:
  When a train runs onto the track, thus connecting the two rails, a short circuit is created, the current drops out and the signal switched to red. The system operates in conjunction with a lever on the tracks. If a train should pass a red light, the lever, which is called a tripcock, comes into play. The tripcock releases the air from the train's air-braking system, thus causing the brakes to come on and stopping the train.

单词	tripcock
释义	tripcock English Etymology From trip +‎ cock Noun tripcock (plural tripcocks) (rail transport) A train-mounted safety device which interacts with a trackside device to stop a train automatically if it passes a signal at danger (showing a red aspect). 2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, pages 136-137: When a train runs onto the track, thus connecting the two rails, a short circuit is created, the current drops out and the signal switched to red. The system operates in conjunction with a lever on the tracks. If a train should pass a red light, the lever, which is called a tripcock, comes into play. The tripcock releases the air from the train's air-braking system, thus causing the brakes to come on and stopping the train.
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