Battery operated transmitter circuit

Communications: electrical – Systems – Call station

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Details

340411, G08B 2100, G08B 2900, G08B 100

Patent

active

040568156

ABSTRACT:
A battery operated code producing wireless RF alarm detection circuit is designed to continuously monitor the condition of the battery and periodically determine the operational integrity of the detection circuit as well as communicate distinct codes indicative of the operational integrity of the detection circuit and alarm conditions. A local receiver circuit responds to the RF transmitted codes from one or more alarm detection circuits.

REFERENCES:
patent: 1497194 (1924-06-01), Norden et al.
patent: 3441858 (1969-04-01), Grahan
patent: 3848231 (1974-11-01), Wootton
patent: 3882476 (1975-05-01), Lofgren

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