Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1980-09-08
1981-11-10
Pitts, Harold I.
Communications: electrical
Audible indication
Percussion-type sound producer
340396, 340399, G10K 1065
Patent
active
043001289
ABSTRACT:
A motor actuated bell comprises a pneumatic actuator. A hammer is operatively associated so as to be movable into striking contact with an associated gong to produce bell sound.
REFERENCES:
patent: 4255744 (1981-03-01), Link
Kobishi Electric Co., Ltd.
Pitts Harold I.
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