escape wheel

escape wheel

noun Horology.
a toothed wheel for regulating a going train to which it is geared, engaging intermittently with the pallets of a pendulum or balance mechanism in such a way as to cause the mechanism to oscillate rhythmically, and in so doing free the going train for part of each oscillation.
Also called scape wheel.


Origin:
1880–85

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World English Dictionary
escape wheel
 
n
horology Also called: scapewheel a toothed wheel that engages intermittently with a balance wheel or pendulum, causing the mechanism to oscillate and thereby moving the hands of a clock or watch

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