Interconnection circuit for a plurality of alarm units

Details Interconnection circuit for a plurality of alarm units Interconnection circuit for a plurality of alarm units

1978-04-03

1980-06-10

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

With particular system function

340533, 340650, 340652, G08B 1710

Patent

active

042075580

ABSTRACT:
Each alarm unit has a sensing circuit which supplies a signal in the presence of a particular problem such as smoke, heat, or equipment failure. The signal energizes an electronic switching device, to couple power to a horn which then produces an alerting tone. The output of the sensing circuit is also coupled by a resistor to electronic switching devices in the other alarm units in the system, so that the occurrence of a problem at one location activates the horn in each alarm unit.

REFERENCES:
patent: 3733596 (1973-05-01), Arima
patent: 3821734 (1974-06-01), Herrliberg et al.
patent: 3909813 (1975-09-01), Scheidweiler et al.
patent: 4141009 (1979-02-01), Fowler

Affiliated with

Also associated with

Rating

Interconnection circuit for a plurality of alarm units does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interconnection circuit for a plurality of alarm units, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interconnection circuit for a plurality of alarm units will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-865887