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:
Nov. 27, 1990
Filed:
Jul. 24, 1989
Joel Choisnet, La Frette/Seine, FR;
Thomson-CSF, Puteaux, FR;
Abstract
The disclosed sensor has a sleeve which forms a section of an engine shaft. Pairs of plane electrodes, parallel to the axis of the shaft, are arranged in the sleeve. The two electrodes of one and the same pair are respectivley soldily joined to the ends of the sleeve, and form a capacitor the inter-electrode space of which varies when an engine torque causes a torsion of the sleeve. The variations in the capacitances of the capacitors are measured by an electronic circuit borne by a plane internal to the sleeve of the sensor. A rotating transformer provides for the supply to the electronic circuit and the transfer of output signals from this circuit to an operating device external the sensor. The disclosed device can be applied to the measurement of torque transmitted bya helicopter engine shaft.