Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1980-06-09
1982-11-23
Caldwell, Sr., John W.
Communications: electrical
Audible indication
Percussion-type sound producer
340399, 340402, G08B 310
Patent
active
043608000
ABSTRACT:
Gong striking mechanism is provided, which comprises a driving electric motor mounted on a frame within a gong, conversion means rotationally connected directly or indirectly to the motor shaft for converting continuous rotational motion of the motor shaft to reciprocal gong striking motion, and resilient means adapted to absorb impact forces during gong striking motion and disposed intermediately between the motor and a hammer.
REFERENCES:
patent: 1136781 (1915-04-01), Elliot
patent: 4286258 (1981-08-01), Ishii
Helios 39, Jahrg. 1933, No. 21, Fachteil, Mar. 21, 1933.
Caldwell Sr. John W.
Kobishi Electric Co., Ltd.
Myer Daniel
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