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.

Date of Patent:
Sep. 02, 1980

Filed:

Jul. 20, 1977
Applicant:
Inventor:

James A Williams, Richmond, IN (US);

Assignee:

Dana Corporation, Toledo, OH (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 51 ; 324 / ;
Abstract

An apparatus for testing the current path integrity and operation of a wiring harness and associated components for a vehicle speed control. The testing instrument is powered from the vehicle power supply and utilizes LEDs to provide a visual indication as to the proper and/or improper operation of the tested circuit. Each LED is connected in series with a current limiting resistor and one or more of the LEDs are connected in series with a blocking diode to protect the LEDs from reverse polarity voltages. Diodes are also connected in parallel with one or more of the LEDs, their series resistors and the blocking diode to limit the forward bias voltages which can develop across the LEDs.


Find Patent Forward Citations

Williams, James. (1980). Vehicle speed control circuit tester (U.S. Patent No. 4220912). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4220912

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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