Power loss alarm system

Details Power loss alarm system Power loss alarm system

1975-06-02

1976-09-07

Caldwell, John W.

Communications: electrical

Systems

Call station

340253C, G08B 2100

Patent

active

039797414

ABSTRACT:
A power loss alarm system in which an electric power supply is connected to a relay so that the relay is energized while the power supply is on. If the power supply fails, or if the voltage is reduced below a certain minimum amount, the relay is de-energized and an alarm signal is activated. The alarm signal is connected to second source of electric power, a battery, for example, so that power loss in the power circuit will not prevent actuation of the alarm. The system includes a selector switch having an "OFF" position, an "ON" or "RETURN" position in which the system is checked and is also operative to sound the alarm when power returns to the system, and a "LOSS" position in which the system is operative to indicate the occurrence of loss of power.

REFERENCES:
patent: 2814795 (1957-11-01), Spooner
patent: 3384886 (1968-05-01), Serra

Affiliated with

Also associated with

Rating

Power loss alarm system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power loss alarm system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power loss alarm system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2175959