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. 19, 1991
Filed:
Jun. 11, 1990
Greg R Pattock, Spring Lake, MI (US);
Sparton Corporation, Jackson, MI (US);
Abstract
The ignition interlock system prevents movement of the ignition switch of a motor vehicle from the 'Off' position to the 'Lock' position unless the transmission selector is in the 'Park' position. The ignition interlock system includes a locking lever spring biased to lock the reciprocable slide of the ignition switch mechanism when the transmission selector is not in the 'Park' position. The locking lever is unlocked from the reciprocable slide by energization of a solenoid in response to the transmission selector being placed in the 'Park' position with the ignition key inserted in the ignition switch. A control circuit energizes or deenergizes the solenoid in response to input signals representing the transmission selector position and the ignition key in/out position.