Signal activated emergency alarm device

Details Signal activated emergency alarm device Signal activated emergency alarm device

1976-03-08

1977-08-02

Safourek, Benedict V.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325364, 340224, H04B 116

Patent

active

040399575

ABSTRACT:
Associated with a conventional household radio, an alarm circuit activated by the increased voltage of a sustained tone signal such as employed by the Emergency Broadcast System as public warning of an emergency condition.

REFERENCES:
patent: 3122705 (1964-02-01), Craig et al.
patent: 3234468 (1966-02-01), Craig
patent: 3258603 (1966-06-01), Wright et al.
patent: 3328695 (1967-06-01), Ruthenberg
patent: 3706911 (1972-12-01), Wilwerding
patent: 3810137 (1974-05-01), Bacon, Jr. et al.

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