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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 of escape wheel
1880-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for escape-wheel
Historical Examples
  • To define the remainder of the form of our escape-wheel tooth we will next delineate the heel.

  • The escape-wheel arbor and pallet staff can be made in the same way.

  • From A as a center, through the point n we sweep the arc k, and on this line we locate the points of the escape-wheel teeth.

  • The next straight tooth of the escape-wheel is now resting against the roller e, and the same operation again takes place.

    Time and Time-Tellers James W. Benson
  • This last arc defines the addendum of the escape-wheel teeth.

  • A is the escape-wheel, B the escape-wheel teeth, C the roller let on the verge, or axis of the balance.

    Time and Time-Tellers James W. Benson
  • Our advice is to use the smaller one if it does not require the escape-wheel teeth to be "dressed," that is, made smaller.

  • But the pressure of the escape-wheel against the detent, and the consequent friction, prevent the pendulum from acting freely.

    Great Facts Frederick C. Bakewell
  • It is to be borne in mind that at the point f is located the extreme point of an escape-wheel tooth.

  • The energy thus stored helps the wheel to revolve the other way during the locking of a tooth of the escape-wheel.

    How it Works Archibald Williams
British Dictionary definitions for escape-wheel

escape wheel

(horology) 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 Also called scapewheel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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