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:
Jan. 10, 1978
Filed:
Jul. 21, 1976
Applicant:
Inventors:
Frans Brouwer, Glencoe, IL (US);
Francis E Ferrari, La Grange Park, IL (US);
Assignee:
Stewart-Warner Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ; H03K / ;
U.S. Cl.
CPC ...
3401 / ; 328109 ; 328138 ; 340251 ;
Abstract
A warning system for detecting a burned out or defective bulb for a motor vehicle is disclosed. A transmitting circuit is connected to detect current flow through the bulb to be monitored. Failure of the bulb to draw current causes the transmitting circuit to produce a series of small voltage pulses on the battery line. These pulses are detected by a receiving circuit which causes an outage indicator light to be illuminated.