heart cam

heart cam

[′härt ‚kam]
(horology)
A heart-shaped cam used in stopwatches and chronographs to return the recording hand to zero.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The choirs performed a range of traditional and modern festive songs and raised nearly pounds 80 for Heart Research UK's Sing for your Heart cam paign.