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:
Jul. 20, 1993
Filed:
Sep. 18, 1990
Herbert F Gee, Vergennes, VT (US);
James R Parkinson, Vergennes, VT (US);
Simmonds Precision Products, Inc., Akron, OH (US);
Abstract
A composite torque transmitting power shaft is provided with built-in discrete sensible ferromagnetic elements. The composite shaft is formed of a non-ferromagnetic material so that the sensible elements, disposed interiorly of the shaft, can be sensed by a sensor element positioned outside of the shaft. Two groups of sensible elements are movable with respect to each other as the shaft twists under the application of torque. The elements can be sensed to provide an indication of the speed, torque or horsepower transmitted by the shaft. Further, the frequency and amplitude of torsional oscillations caused by pulsating power source or load characteristics can also be measured.