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. 07, 1984
Filed:
Oct. 30, 1981
Applicant:
Inventor:
Alfred Babsch, Ulm-Soflingen, DE;
Assignee:
Mannesmann AG, Duesseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 31 ; 361 75 ; 361101 ;
Abstract
A d.c. motor, particularly a paper-feed drive motor for printers, is monitored and controlled (e.g., for protection against paper jamming) by controlling a motor switch to turn the motor off temporarily when excess current is monitored, but turning it on to probe persistence of the condition. This turn-on will remain short if, indeed, overload current conditions are still present. The circuit includes a bistable multivibrator with input circuit rendering it monostable for normal operating conditions and astable for the overload case.