Electronic circuit for telephone paystation coin operated trigger
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United States of America Patent
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Jan 28, 1992
Grant Date -
N/A
app pub date -
Feb 21, 1991
filing date -
Feb 21, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A circuit operated in response to deposit of a coin through a trigger switch to selectively operate one of a plurality of signal generators. When coins are deposited through said coin trigger switch, blocking light from a light source to a light detection means, an associated signal driver activates a selected tone signal generator.
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