Low battery indicator

Details Low battery indicator Low battery indicator

1985-05-13

1986-11-11

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 340573, G08B 2100

Patent

active

046225447

ABSTRACT:
An emergency response system in which the low battery condition of a wireless help unit is automatically detected and indicated at a receiver. The help unit provides, as part of the transmitted signal, a signal indication of battery condition. The received signal is decoded and, upon detection of a low battery signal indication, a visual and/or audible output indication denotes this condition. The low battery indication at the receiver remains on until a transmission is received from the help unit when containing a fresh battery replacement.

REFERENCES:
patent: 3909722 (1975-09-01), Bennett, Jr.
patent: 3919640 (1975-11-01), Simciak
patent: 3979657 (1976-09-01), Yorksie
patent: 4242672 (1980-12-01), Gault
patent: 4308430 (1981-12-01), Fahey et al.
patent: 4338493 (1982-07-01), Stennuis et al.
patent: 4471492 (1984-09-01), Mann et al.
patent: 4549169 (1985-10-01), Moura et al.

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