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. 12, 1985
Filed:
Feb. 03, 1982
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G01P / ; G01P / ;
U.S. Cl.
CPC ...
324174 ; 310156 ;
Abstract
A disk type motor speed detecting device is made up of a doughnut shaped plate high in magnetic permeability secured to the inner surface of the lower plate of the body, a coil wound on a small portion of the doughnut shaped plate; a doughnut shaped magnet with S and N poles one of which has a magnetization angle of more than 180.degree., a disk-shaped yoke secured to the magnet, and a rotary shaft adapted to rotate the magnet relative to the doughnut shaped plate.