Electronic latch circuitry
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United States of America Patent
Stats
-
Nov 22, 1988
Grant Date -
N/A
app pub date -
Mar 9, 1987
filing date -
Mar 9, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A relay coil associated with a pair of contacts connects an electrical source to a load. Actuation of a coil sensing element by a trigger input signal supplies current to the coil. In response to the trigger input signal the load sensing element supplies a latch maintain signal to a switching element which becomes conductive to establish current flow to the load. As long as the load sensing element detects current to the load the switching element remains conductive for a 'latched' state. Interruption of current to the load converts the elements to an 'off' state until another trigger input signal is transmitted to the load sensing element.
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