Piezoelectric switch using piezoceramic bending elements, and in particular a relay utilizing such elements
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United States of America Patent
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Jan 10, 1984
Issued Date -
N/A
app pub date -
Aug 27, 1982
filing date -
Jul 9, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A piezoceramic device has two layers of piezoceramic material bonded together, the layers polarized in opposite directions. The device is used to detect, and indicate, a change of voltage between two conductors and specifically is used between the tip and ring lines of a telephone line having more than one extension, to give a line status indication. A visual, yet non-electrical, readout of one polarity is provided when the bending piezoelectric element moves into a window in the housing wall.
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