Electrical monitoring system

Details Electrical monitoring system Electrical monitoring system

1992-11-19

1995-06-06

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340531, 340505, 34082508, G08B 108

Patent

active

054226260

ABSTRACT:
A system for monitoring a location for the occurrence of a predetermined condition thereat includes a transmitter located at the monitored location for normally transmitting a series of first electrical signals at a first repetition rate and in a first time slot; a sensor at the monitored location for sensing the predetermined condition; and a control circuit effective, upon sensing the predetermined condition, to interrupt the transmission of the first electrical signals and to initiate the transmission of a series of second electrical signals at a second repetition rate and in a second time slot both having a predetermined relation to the first repetition rate and the first time slot of said first electrical signals.

REFERENCES:
patent: 4101872 (1978-07-01), Pappas
patent: 4506386 (1985-03-01), Ichikawa et al.
patent: 5166664 (1992-11-01), Fish

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