Audible signal device

Details Audible signal device Audible signal device

1978-04-24

1980-04-22

Pitts, Harold I.

Communications: electrical

Audible indication

Diaphragm

340392, 340402, G10K 912

Patent

active

041997522

ABSTRACT:
An improved electromagnetic audible signal device has a coil and an associated magnetic core. A flexible striker arm carrying a movable magnetic contact is positioned above the core. A multiconvoluted diaphragm is located above the movable contact and the striker arm. The contact periodically impacts against this diaphragm generating an audible signal. The invention includes a spring and screw arrangement for linearly adjusting the gap between the core and striker arm. The same spring also serves to restore vibrational mechanical energy to the system which would normally be lost to the housing.

REFERENCES:
patent: 2561355 (1951-07-01), Fish
patent: 2722681 (1955-11-01), Hersh
patent: 3298020 (1967-01-01), Maun
patent: 3345525 (1967-10-01), MacBlane
patent: 3516088 (1970-06-01), Allport
patent: 3518667 (1970-06-01), Hanna
patent: 3522601 (1970-08-01), Dolter
patent: 3525992 (1970-08-01), West
patent: 3530463 (1970-09-01), Spadini
patent: 3550118 (1970-12-01), Jenkins
patent: 3653039 (1972-03-01), Hoare
patent: 3656155 (1972-04-01), Parkes
patent: 3784944 (1974-01-01), Schantz
patent: 4050066 (1977-09-01), Yanagisawa
patent: 4065733 (1977-12-01), Shigemori
patent: 4097861 (1978-06-01), Pariza

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