Buzzer with adjustable volume level

Details Buzzer with adjustable volume level Buzzer with adjustable volume level

1982-07-01

1987-03-31

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Pneumatic-type sound producer

340384R, G01K 108

Patent

active

046546375

ABSTRACT:
A compact electrical buzzer is provided with an adjustment cap which is threadably positioned from the end of the bobbin sleeve which contains the buzzer plunger. The cap has a peripheral skirt which frictionally engages the buzzer housing. The mounting bracket is provided with a saddle-shaped rib on the lower mounting surface which, together with a spaced protrusion, provides a three point mounting on the supporting surface.

REFERENCES:
patent: 2757365 (1956-07-01), Perez
patent: 3518667 (1970-06-01), Hanna
patent: 3522601 (1970-08-01), Dolter
patent: 3533103 (1970-10-01), Hayden
patent: 3537104 (1970-10-01), Dolter
patent: 3618421 (1971-11-01), Pecak
patent: 3927403 (1975-12-01), Schantz
patent: 4005413 (1977-01-01), Berns
patent: 4054870 (1977-10-01), Barber
patent: 4115770 (1978-09-01), Kanazawa
patent: 4163223 (1979-07-01), Sato
patent: 4212001 (1980-07-01), Taira
patent: 4398182 (1983-08-01), Hibell
patent: 4413253 (1983-11-01), Hofer

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