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:
Oct. 07, 1980
Filed:
Jan. 29, 1979
Applicant:
Inventor:
Steven W Brooks, Pamona, CA (US);
Assignee:
Spin Physics, Inc., San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318331 ; 318334 ; 318471 ;
Abstract
Apparatus for detecting the speed of an electric motor that forms part of a web transport system employs a bridge circuit adapted to measure the back emf of the motor. Thermally induced changes to the armature resistance of the motor are compensated for by varying the bridge resistances, such changes being identified by comparing the bridge circuit signal output with a reference signal.
Brooks, Steven. (1980). Apparatus for detecting the speed of an electric motor (U.S. Patent No. 4227129). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4227129
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile