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单词 quarter snail
释义

> as lemmas

quarter snail
quarter snail n. a snail (snail n.1 5a) which forms part of the quarter hour striking mechanism on a clock or watch.
ΚΠ
1764 Dublin Mag. June 385/2 The particulars of this curious watch are as follows, viz... The quarter and half quarter snail and canon pinion, [etc.].
1816 J. Smith Mechanic 405 R is the quarter locking lever, S the end which falls upon the quarter-snail.
1881 F. J. Britten Watch & Clockmakers' Handbk. (ed. 4) 80 The quarter snail attached to the canon pinion is doubled.
1958 Chambers's Techn. Dict. (ed. 3) 693 Quarter snail (Horol.). The snail in a chiming clock or repeater-watch which controls the number of teeth picked up on the quarter rack.
1999 Catal. Summer in www.antique-watch.com (2007) (O.E.D. Archive) The pierced gilt hour wheel and polished steel quarter snail [are] visible through the centre of the blue steel plate.
extracted from quartern.
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