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:
May. 03, 1988
Filed:
Apr. 10, 1987
Applicant:
Inventors:
Thaddeus Schroeder, Rochester Hills, MI (US);
Harry J Bauer, Troy, MI (US);
Jack H Beard, Sterling Heights, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
3403 / ;
Abstract
A magnetic shaft angle encoder uses a gear or toothed wheel for inducing periodic electrical pulses in an inductive pickup. The teeth are evenly spaced and every tooth generates a signal as it passes the pickup. A reference tooth is slightly shorter than the others so that the period of the pulse it generates is shorter than the others and is easily detected to obtain an accurate shaft index position. Since a pulse is produced for every tooth, the pulses provide an excellent means of instantaneous speed sensing.