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. 16, 1982
Filed:
Aug. 27, 1979
Perry D Laffoon, Yukon, OK (US);
John A Shannon, Oklahoma City, OK (US);
Other;
Abstract
An electrical receptacle is connected to the alternator of an automotive vehicle to permit connection thereto of a power tool. A switching circuit senses the presence of an electric current through the tool to actuate relays in the switching circuit to cause the alternator to operate in a high voltage mode wherein the alternator provides power at a voltage level suitable for operating the tool at such times that the engine of the vehicle is operating. A unidirectional current path is provided between the battery of the vehicle and the receptacle to enable operation of the switching circuit at such times that the engine is not operating while isolating the battery from electrical power generated by the alternator in the high voltage mode of operation thereof. A first starting relay is actuated by closure of a set of normally open contacts of a relay in the switching circuit to supply power to the ignition system of the vehicle engine from the battery when the switching circuit is caused to operate by connecting a power tool to the receptacle and switching the power tool on at such times that the engine of the vehicle is not operating. A second starting relay is actuated by closure of another set of normally open contacts of a relay in the switching circuit to supply power to the starter motor of the vehicle engine so that the engine can be started by means of a power tool connected to the receptacle.