Motor actuated bell

Details Motor actuated bell Motor actuated bell

1980-08-06

1983-01-11

Curtis, Marshall M.

Communications: electrical

Audible indication

Percussion-type sound producer

340392, 340399, 340402, G08B 300

Patent

active

043684580

ABSTRACT:
In a motor actuated bell a cam member is operatively connected to a motor drive shaft. The cam member acts directly on a leaf spring for moving a hammer attached to the leaf spring generally in parallel relation to the axis of rotation of the cam member to thereby allow the hammer to strike against an associated gong.

REFERENCES:
patent: 385574 (1888-07-01), Sanderson
patent: 386164 (1888-07-01), Sanderson
patent: 461241 (1891-10-01), Grantland
patent: 1694247 (1928-12-01), Briggs
patent: 1716369 (1929-06-01), Critchfield
patent: 1809331 (1931-06-01), Duncan
patent: 3076960 (1963-02-01), Knutson
patent: 4183018 (1980-01-01), Sakaguchi
patent: 4286258 (1981-08-01), Ishii
Helios 39, Jahrg. 1933, No. 21, Fachteil, Mar. 21, 1933, p. 168.

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