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:
Aug. 30, 1977
Filed:
Dec. 17, 1975
Mark D Disosway, III, Anderson, IN (US);
Leonard J Sheldrake, Noblesville, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The output signal produced by a two input electrical circuit element of the type which produces opposite polarity output signals upon the application of the same polarity input signal to respective ones of the input terminals is applied to the control electrode of a switching transistor which, when conductive, is effective to complete the energizing circuit of an internal combustion engine cranking motor. An electrical bias signal of a selected polarity is applied to the one of the input terminals of this circuit element which will result in an output signal of the polarity which will trigger the switching transistor conductive through the current carrying electrodes thereof. An engine speed electrical signal of the selected polarity and of a magnitude directly proportional to the speed of an associated cranked internal combustion engine is applied to the other input terminal of this circuit element whereby when the engine speed has reached and exceeds a predetermined magnitude, the output potential signal of the circuit element is of a polarity which will extinguish the switching transistor to interrupt the cranking motor energizing circuit.