Means for improving the electroacoustical properties of a buzzer

Details Means for improving the electroacoustical properties of a buzzer Means for improving the electroacoustical properties of a buzzer

1977-08-01

1979-02-27

Pitts, Harold I.

Communications: electrical

Audible indication

Diaphragm

340401, 340402, G01K 912

Patent

active

041421868

ABSTRACT:
The electroacoustical properties of an electromechanical vibrating device for producing an audible signal are improved by attenuating undesirable frequencies of the audible signal to produce a predominant frequency and by accentuating the predominant frequency. The improvement includes a planar vibration diaphram comprised of a plastic polymer material, a vibrating striking member positioned to strike the vibration diaphram at its center; a bumper comprised of resilient material interposed between the vibrating striking member and the vibration diaphram, and a resonant chamber in spaced relation to the vibration diaphram having a resonant frequency substantially equal to the predominant frequency.

REFERENCES:
patent: 3408645 (1968-10-01), Doggart
patent: 3517390 (1970-06-01), Whitehead
patent: 3656156 (1972-04-01), Berns

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