Electret bistable system
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United States of America Patent
Stats
-
May 27, 1980
Grant Date -
N/A
app pub date -
Jan 3, 1978
filing date -
Jan 4, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to electret bistable systems comprising two fixed electrodes forming a capacitor. A sheet of electret material is inserted for creating holding forces in two rest positions of a moving element located in the capacitor gap. In accordance with the invention, the electret sheet is separated from the corresponding fixed electrode by a layer of dielectric which can be an air gap. As a variant, the charge density of the electret sheet may be concentrated in islands for reducing the holding forces.
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