Hand-held ignition voltage tester

Electricity: measuring and testing – Internal-combustion engine ignition system or device – Apparatus for coupling a measuring instrument to an ignition...

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324393, 324379, 324 725, G01R 1504

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active

058349391

ABSTRACT:
A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coupling to the spark plug wire. The capacitive probe generates a voltage signal which is representative of the voltage on the spark plug wire. A plurality of voltage level indicators are mounted to the housing to form a bar graph, with each indicator corresponding to a selected voltage level. A measurement circuit is coupled to the power cables and the capacitive probe for activating the voltage level indicators in response to the voltage signal.

REFERENCES:
patent: 3763421 (1973-10-01), Glomski
patent: 4052665 (1977-10-01), Gruenwald
patent: 4090130 (1978-05-01), Willenbecher
patent: 4942362 (1990-07-01), Lance
patent: 5132625 (1992-07-01), Shaland
patent: 5399972 (1995-03-01), Hnat
patent: 5497092 (1996-03-01), Kaszanics
patent: 5612620 (1997-03-01), Heuvel

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