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:
Jun. 29, 1982
Filed:
Apr. 15, 1980
Keith A Kreft, Mt. Prospect, IL (US);
Sun Electric Corporation, Crystal Lake, IL (US);
Abstract
A voltage divider network comprising three series connected resistors serve to reference a test signal lead connectable to an internal combustion engine, with respect to ground for providing a voltage test signal on an output conductor representative of test data to be retrieved from the engine. Whenever the test signal lead is disconnected from the engine, the voltage divider network provides a non-zero voltage level on the output conductor, having a magnitude lying without a predetermined voltage range of possible test signals. A signal processing circuitry analyzes the test signals for providing a visual analysis display for the operator of the analyzer, and further is responsive to the aforesaid non-zero voltage level for blanking the portion of the visual display which is reserved for displaying analysis data.