Membrane switch with means for preventing contamination of the interior thereof
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United States of America Patent
Stats
-
Feb 3, 1981
Grant Date -
N/A
app pub date -
Apr 23, 1979
filing date -
Apr 23, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane switch has a substrate and a plurality of first conductors formed on the substrate. A flexible membrane having a plurality of second conductors formed thereon is positioned relative to the substrate by a spacer which may be adhesively secured to both membrane and substrate. There are openings in the spacer in register with aligned first and second conductors. The membrane is caused to move toward the substrate through an opening to cause contact between the aligned first and second conductors in response to pressure upon the exterior of the membrane. There are vent passage means interconnecting the spacer openings, which vent passage means may be open to the atmosphere.
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