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. 24, 1988
Filed:
Mar. 04, 1987
Applicant:
Inventor:
Hermann Rosshirt, Bristol, CT (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318696 ; 318685 ;
Abstract
A two wire control circuit for a bidirection variable speed stepping motor having motor drive logic adjacent to the motor. The control signals are momentary pulses which are superimposed on the supply line. The very short duration pulses are not recognized by the motor, but are used to trigger the sequence of the motor drive logic and through a low pass filter, the same modulated power supply line can power the drive logic.