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:
Jun. 09, 1981
Filed:
Feb. 26, 1979
Applicant:
Inventors:
Frank S Buchwald, Beachwood, OH (US);
Richard C Maher, Painesville, OH (US);
Jerome E Buchina, Eastlake, OH (US);
Assignee:
Towmotor Corporation, Mentor, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310242 ; 310245 ;
Abstract
A brush wear indicator includes a first contactor and a second contractor movable relative to the first contactor from an open position to a closed position to connect an electrical circuit to an indicator. The second contactor is maintained in the open position against the resiliency of a leaf spring by a coil spring which urges a brush toward a commutator in response to wear to the brush. When the brush wears away to a preselected length the coil spring will have moved to a position at which the leaf spring is free to bias the second contactor to the closed position.