Proximity switch
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United States of America Patent
Stats
-
Apr 12, 1983
Grant Date -
N/A
app pub date -
May 27, 1981
filing date -
May 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The proximity switch has a capacitive sensor which comprises a metallic support mounted on a printed circuit board and supporting, on a surface parallel to said board but facing away from it, a layer made of electrically conductive foam material. The latter nestles against a cover plate made of glass which provides the dielectric of a capacitive sensor actuatable by the stray field of the mains. When this alternating stray field is concentrated by a part of a human body brought into the vicinity of the sensor, the latter will actuate an electronic switch connected to it.
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Family
International Classification(s)
Cited Art Landscape
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