Title: Electrostatic position-measuring transducer

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.

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Inventors: Farrand, Robert W. (Weston, CT, US)
Elbling, Joseph (Armonk, NY, US)

Application Number: 541983
Filing Date: 1975-01-17
Publication_date: 1976-06-01
Assignee: Inductosyn Corporation (Valhalla, NY)
Primary Class(es): 324/660 318/662, 324/725
Other Classes:
US Patent Ref:

2799835	Jul, 1957	Tripp et al.	336/129.
3146394	Aug, 1964	Frisch	340/200.
3222668	Dec, 1965	Lippel	340/200.
3238523	Mar, 1966	Masel et al.	340/200.
3702467	Nov, 1972	Melnyk	340/200.
3873916	Mar, 1975	Sterki	324/61.

Other Refs:
Primary Examiner: Caldwell, John W.
Assistant Examiner: Groody, James J.
Attorney: Downing; John L.