507 Mechanical Movements by Henry T. Brown
Author:Henry T. Brown [Brown, Henry T.]
Language: eng
Format: epub, azw3
ISBN: 9780486164670
Publisher: Dover Publications
Published: 2012-07-17T16:00:00+00:00
292. Stud escapement, used in large clocks. One pallet, B, works in front of the wheel and the other at the back. The studs are arranged in the same manner, and rest alternately upon the front or back pallet. As the curve of the pallets is an arc described from F, this is a repose or dead-beat escapement.
293. Duplex escapement, for watches, so called from partaking of the characters of the spur and crown wheels. The axis of balance carries pallet, B, which at every oscillation receives an impulse from the crown teeth. In the axis, A, of balance-wheel is cut a notch into which the teeth round the edge of the wheel successively fall after each one of the crown teeth passes the impulse pallet, B.
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