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:
Mar. 29, 1977
Filed:
Feb. 21, 1975
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318314 ; 318318 ; 318341 ;
Abstract
A first physical quantity derived from a detector coupled to a rotary machine is combined with a first reference physical quantity to produce a rectangular waveform signal with an amplitude which changes in response to the variation in supply voltage. The rectangular waveform signal is converted into a second physical quantity and is compared with a second reference physical quantity derived by the division of a supply voltage to produce control signals for rotating the rotary machine at a predetermined rate.