for timed or repeated operation

Full Title

Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs > the resonating device having the shape of a bell, plate, rod, or tube > electrically operated > the sounding member being a bell > Operating or striking mechanisms therefor > for timed or repeated operation

Classification Context

Section:

PHYSICS

Class:

MUSICAL INSTRUMENTS; ACOUSTICS

Subclass:

SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR