Miniature sounder with double tuned cavity

Details Miniature sounder with double tuned cavity Miniature sounder with double tuned cavity

1981-02-19

1983-11-01

Crosland, Donnie Lee

Communications: electrical

Audible indication

Diaphragm

340384R, 340392, 116142R, 181160, 181182, 181198, G08B 310

Patent

active

044132530

ABSTRACT:
A miniature sounder having a diaphragm closing one end of a tuned chamber. The other end of the chamber communicates with the interior of a tuned housing. The chamber and housing are both tuned to the desired oscillating frequency of the diaphragm with the chamber resonant frequency comprising substantially three times the desired frequency and twice the housing resonant frequency.

REFERENCES:
patent: 1283510 (1918-11-01), Heck
patent: 3327808 (1967-06-01), Shaper
patent: 4183017 (1980-01-01), Sims
patent: 4251807 (1981-02-01), Hofer et al.

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