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:
Dec. 15, 1992
Filed:
Dec. 18, 1990
Applicant:
Inventors:
Assignee:
Fiat Auto S.p.A., Turin, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G05B / ;
U.S. Cl.
CPC ...
3241 / ; 3241 / ; 318636 ;
Abstract
The device measures the number of revolutions completed by the shaft of a permanent magnet electric motor in a period of time during which it is set in motion by the effect of its connection to a respective electrical supply source, essentially by means of calculation of the integral of the counter-electromotive force which the motor develops in the aforementioned period of time.