Dual direction switch
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 23, 1991
Grant Date -
N/A
app pub date -
Oct 31, 1989
filing date -
Oct 31, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezo film switch comprises a cantilever with a pair of layers, including a piezo film layer and a flexible, backing layer laminated thereto. The piezo film layer produces a positive or negative output pulse, depending upon a direction of deflection of the cantilever. Interface circuitry coupled to the piezo film layer is powered by the output pulses and provides 'pseudo contact closures' which emulate the operation of a mechanical switch.
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