Suicide switch/interrupter with variable volume chamber and puffer action
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United States of America Patent
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Oct 25, 1988
Grant Date -
N/A
app pub date -
Oct 30, 1987
filing date -
Oct 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switch apparatus comprising a fixed tubular contact having an inner end, a movable tubular contact having an inner end and being movable between a closed position wherein the inner ends of the contacts overlap and an open position wherein the inner ends of the contacts are spaced apart, a piston fixed to the movable contact for movement thereiwth, a cylinder slideably receiving the piston and cooperating with the piston to define a variable volume pressure chamber which decreases in volume as the movable contact moves from the closed position to the open position, and a housing fixed to the piston and having an inner surface which cooperates with the piston to define an arc chamber containing the inner end of the movable contact, the housing having therein an aperture through which the fixed contact extends when the movable contact is in the closed position, and the arc chamber communicating with the pressure chamber so that gas is forced from the pressure chamber into the arc chamber when the movable contact moves from the closed position to the open position.
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