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. 07, 1982
Filed:
Sep. 03, 1980
Horst Plassmeier, Herford, DE;
Durkoppwerke GmbH, Bielefeld, DE;
Abstract
To test the integrity of a plurality of operating circuits each including a load energizable by an associated driver under the control of a microcomputer, a capacitor charged with unipolar pulsating test voltage is connected to a common terminal of all the operating circuits and concurrently therewith to the input of a trigger element whose threshold equals about half the peak amplitude of that voltage. During one or more brief intervals the microcomputer cuts in the driver of a selected circuit and senses the output voltage of the trigger element to determine whether or not the capacitor is being discharged through that circuit. A display device controlled by the microcomputer indicates the conductive or blocked state of the selected circuit as well as a possible malfunction manifesting itself in a discharge of the capacitor before any driver is turned on.