Piezoelectric switch using piezoceramic bending elements, and in

Details Piezoelectric switch using piezoceramic bending elements, and in Piezoelectric switch using piezoceramic bending elements, and in

1982-08-27

1984-01-10

Miller, J. D.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

200181, H01H 5700

Patent

active

044255241

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.

REFERENCES:
patent: 2330461 (1943-09-01), Wantz
patent: 3507054 (1970-04-01), Janke
patent: 3777093 (1973-12-01), Sterns et al.

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