The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2002
Filed:
Dec. 09, 1999
Edward Wilson, Great Harwood, GB;
Colin Moore, Kirkham, GB;
British Aerospace Plc, Farnborough, GB;
Abstract
A non-contacting capacitive position transducer comprises a stator substrate carrying two electrically conducting inverted wedge regions whose width varies inversely in a sensing direction. A moveable pick-off is capacitively coupled to both wedges. The wedges are driven with respective distinguishable time varying periodic waveforms, e.g. a sine wave and a cosine wave, and the pick-off voltage at processed to determine the position of the pick-off in the sensing direction. Various configurations of transducer are described, including those of linear, cylindrical and disc form. The pick-off voltage is preferably transferred from the pick-off back to the stator by capacitively coupling the pick-off to a suitably screened pick-off track on the stator.