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Mechanical Embodiment for Low-Cost Implementation of Capacitive Emitter Design Disclosure Number: IPCOM000044232D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05

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Davis, JM Sweat, RH Williams, ER [+details]


Currently available methods of fabricating capacitive emitters are somewhat time-consuming, tedious, and costly. This article presents a new technique for manufacturing this device that will improve the concentricity, flatness, and repeatability of the design at lower cost. Requirements of the Capacitive Emitter The capacitive emitter is a novel design for a rotational position/velocity transducer that functions on the principle of detecting changes in a capacitive field due to the rotation of two parallel components. Proper operation of the device requires that a conductive pattern be formed on the surfaces of two parallel disks oriented concentrically to a central rotating shaft. The two disks must be separated by an air gap of approximately .030 to .060 inch.