Vehicle speed control circuit tester
US4220912A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1977 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Jul 20, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.