Power saver circuit for audio/visual signal unit

Details Power saver circuit for audio/visual signal unit Power saver circuit for audio/visual signal unit

1984-03-21

1985-02-12

Groody, James J.

Communications: electrical

Systems

Plural

340331, 340384E, G08B 2700

Patent

active

044994532

ABSTRACT:
A combined audio and visual signal unit with the audio and visual components actuated alternately and powered over a single cable pair in such a manner that only one of the audio and visual components is drawing power from the power supply at any given instant. Thus, the power supply is never called upon to provide more energy than that drawn by the one of the components having the greater power requirement. This is particularly advantageous when several combined audio and visual signal units are coupled in parallel on one cable pair. Typically, the signal unit may comprise a horn and a strobe light for a fire alarm signalling system.

REFERENCES:
patent: 4101880 (1978-07-01), Haus
patent: 4115758 (1978-09-01), Luteran
patent: 4274084 (1981-06-01), Haus
patent: 4276542 (1981-06-01), Russ

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