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. 13, 1996
Filed:
Aug. 27, 1993
Applicant:
Inventors:
Philip M Anderson, Madison, NJ (US);
John W Curran, Lebonan, NJ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73862324 ; 73800 ;
Abstract
Torque on a rotating or stationary shaft is measured by an apparatus that includes a light source for emitting light along a light path; a reflection grating fixed to the shaft along the light path reflecting and diffracting the light; and a light detector having a plurality of light detecting elements for receiving the reflected and diffracted light. Torque on the shaft produces a change in the grating spacing of the grating, which in turn produces a change of diffraction angle of the reflected light, thereby causing a different element of the light detector to receive the light.