Power saver circuit for audio/visual signal unit
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United States of America Patent
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Feb 12, 1985
Issued Date -
N/A
app pub date -
Mar 21, 1984
filing date -
May 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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