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. 12, 1991
Filed:
Apr. 03, 1989
David E Pastor, Pleasanton, CA (US);
Other;
Abstract
An ignition disabling anti-theft device (16) for a motor vehicle in which circuit switching devices (18 and 20) are used to disable the ignition system (6) of a vehicle every time the vehicle engine is shut off. The ignition sysem (6) can be enabled only by the application of battery voltage from a pre-existing vehicle electrical circuit through a secret switch (10). Further, the anti-theft device only disables the RUN circuit to the vehicle ignition system allowing the engine starter circuit to operate and the engine to start normally either with an unauthorized key or by splicing wires in the ignition circuit. When the starter circuit is deactivated after engine start, the engine will die, simulating an out of tune engine. A bypass switch (8) is provided to allow normal, unprotected operation of the engine ignition system when required.