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:
Aug. 25, 1998
Filed:
Feb. 06, 1997
Stefan Grieser-Schmitz, Wuppertal, DE;
Varity GmbH, Koblenz, DE;
Abstract
A monitoring circuit for detecting a malfunctioning warning lamp circuit includes a first device for monitoring the voltage within the warning lamp circuit and a second device for monitoring the current through the warning lamp circuit. Each of the monitoring devices has an output which is connected to a decision device. The first device generates a first output signal when the monitored voltage is greater than a predetermined voltage and a second output signal when the monitored voltage is less than the predetermined voltage. The second device generates a first output signal when a current flows through the lamp and a second output signal when there is no current flowing through the lamp. The decision device is responsive to the output signals from the monitoring devices to generate a failure signal when the warning lamp circuit malfunctions.