Latch relay drive circuit
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United States of America Patent
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-
Nov 29, 1983
Grant Date -
N/A
app pub date -
Sep 29, 1982
filing date -
Sep 29, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A latch-relay drive circuit includes a pair of switching devices for separately energizing the set and reset latch-relay coils. To prevent the latch-relay from remaining set once the power fails, an energy storage device, such as a capacitor charged from the power supply, is automatically switched across the reset coil by a switching circuit once the power supply voltage drops below a predetermined voltage thereby automatically resetting the relay.
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