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:
Nov. 23, 1976
Filed:
Mar. 31, 1975
Applicant:
Inventors:
John H Conrad, Brosserd, CA;
Joseph P Seemann, Ste. Julienne, CA;
Assignee:
Unican Security Systems, Ltd., Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60Q / ; B60Q / ;
U.S. Cl.
CPC ...
307 / ; 307141 ; 315 82 ; 3171 / ; 3171 / ;
Abstract
In a vehicle having an ignition switch, headlights and a storage battery, a relay has its winding in series with the battery and the collector-emitter circuit of a transistor and has normally open contacts in a headlight energizing circuit. A resistance-capacitance time delay circuit, connected with the ignition switch, controls bias of the transistor. Hence the transistor conducts whenever the ignition switch is 'on' and for a short time after it is turned off; and while it conducts, the relay contacts are closed and the lights are energized.