Electric switch with counteracting electro-electro-dynamic forces
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United States of America Patent
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-
Jul 18, 1989
Grant Date -
N/A
app pub date -
Apr 1, 1988
filing date -
Apr 1, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switch has contacts constructed so that an electro-dynamic force is created by the current flowing through the switch which tends to maintain the switch in a closed state. This force counteracts other electro-dynamic forces which tend to open the switch. The contact design is particularly adapted from use in a single pole-double throw switch having a contact arm that is movable between two fixed contacts. The electro-dynamic force compensation exists between the contact arm and whichever one of the fixed contacts the contact arm is against. The fixed contacts also include arc runners so that any arc that develops as the contacts separate eliminates electro-dynamic force which tends to maintain the switch in a closed state.
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