Position detecting device

Details Position detecting device Position detecting device

1991-12-20

1994-05-31

Gellner, Michael L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361296, 324660, G03B 118, H01G 514

Patent

active

053173511

ABSTRACT:
A position detecting device comprises a movable member, a first electrode movable with the movement of the movable member, and a second electrode disposed at a location opposed to the first electrode. The edge of at least one of the first and second electrodes are inclined with respect to the direction of movement of the first electrode, whereby the area over which the first electrode and the second electrode overlap each other is varied by the relative movement of the two electrodes and an electrostatic capacity provided by the two electrodes is also varied to make the detection of the absolute position of the movable member possible and to change a position detection accuracy in accordance with a position of the first electrode.

REFERENCES:
patent: 3221256 (1965-11-01), Walden
patent: 4420754 (1983-12-01), Andermo
patent: 4816859 (1989-03-01), Maruyama et al.
patent: 5136286 (1992-08-01), Veneruso

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