Electrostatic position-measuring transducer

Details Electrostatic position-measuring transducer Electrostatic position-measuring transducer

1975-01-17

1976-06-01

Caldwell, John W.

Communications: electrical

Systems

Call station

317253, 324 61R, 323 93, 318662, G08C 1916

Patent

active

039613186

ABSTRACT:
Two relatively movable, spaced elements having electrostatically coupled sets of uniformly spaced interdigitated electrodes form a precision, high gain linear or angular position-measuring transducer. Coupling electrodes on one element capacitively couple to portions of the electrodes on the other element so that electrical connections to external excitation and detection circuitry need be made to only one of the two elements. The shape and dimensions of the electrodes can be arranged to reduce or eliminate undesired impedance variations, capacitive coupling and unwanted harmonic coupling wave frequency components.

REFERENCES:
patent: 2799835 (1957-07-01), Tripp et al.
patent: 3146394 (1964-08-01), Frisch
patent: 3222668 (1965-12-01), Lippel
patent: 3238523 (1966-03-01), Masel et al.
patent: 3702467 (1972-11-01), Melnyk
patent: 3873916 (1975-03-01), Sterki

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