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. 29, 1976
Filed:
Oct. 15, 1974
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01P / ; H02K / ;
U.S. Cl.
CPC ...
324173 ; 310168 ; 310113 ;
Abstract
A speed detector for use with a miniature DC motor is disclosed wherein a device such as coils or Hall generators for detecting the magnitude and direction of leakage flux are placed in opposed relationship with at least one pair of field poles of the DC motor, so that an output signal having a frequency proportional to an integral multiple of the number of slots of the armature may be derived.