Sound generator

Details Sound generator Sound generator

1995-01-04

1996-10-01

Swarthout, Brent A.

Communications: electrical

Audible indication

Percussion-type sound producer

3403921, 3403924, 3403925, G08B 300

Patent

active

055614132

ABSTRACT:
The sound generator comprises a pipe gong and a hammer device for striking the pipe gong. The hammer device comprises a leaf spring whose bottom end is fixed, a hammer head installed on the upper end of the leaf spring, and a solenoid-type hammer driving device. The hammer driving device has a driving rod jointed to the leaf spring, a solenoid for driving the driving rod to stick out the front end, and a coil spring for drawing back the driving rod.

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patent: 824397 (1906-06-01), Word
patent: 1034001 (1912-07-01), Durfee
patent: 1098834 (1914-06-01), Oliver
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patent: 1722983 (1929-07-01), Hammond, Jr.
patent: 2097823 (1937-11-01), Roe
patent: 2104963 (1938-01-01), Anderson
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patent: 2463380 (1949-03-01), Harris
patent: 4088986 (1978-05-01), Boucher
patent: 4247933 (1981-01-01), Nakamura
patent: 4286259 (1981-08-01), Ishii
patent: 4357692 (1982-11-01), Broghammer et al.
patent: 4358838 (1982-11-01), Nakamura

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