for timed or repeated operation

Full Title

Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs (multi-toned musical instruments G10D13/08; automatic carillons G10F1/10) > the resonating devices having the shape of a bell, plate, rod, or tube (bells for towers G10K1/28) > mechanically operated; Hand bells; Bells for animals > Operating or striking mechanisms therefor > for timed or repeated operation