Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1980-07-10
1983-04-19
Caldwell, Sr., John W.
Communications: electrical
Audible indication
Percussion-type sound producer
340399, 340402, G08B 310, G10K 1064
Patent
active
043807585
ABSTRACT:
A motor actuated bell comprises a crank member operatively connected to a motor drive shaft. An elongated connecting plate is connected at one end thereof to the crank member for being reciprocally moved along its axis. A pivotal lever is connected at one end thereof generally perpendicularly to the other end of said connecting plate for being subjected to swinging movement. A hammer means has a resilient means resiliently supporting a hammer element on the lever.
REFERENCES:
patent: 195391 (1877-09-01), Perry
patent: 2474405 (1949-06-01), Ritti
patent: 3435450 (1969-03-01), Pena
patent: 4183018 (1980-01-01), Sakaguchi
patent: 4286259 (1981-08-01), Ishii
Caldwell Sr. John W.
Kobishi Electric Co., Ltd.
Myer Daniel
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