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US Patent: 4,506,546
Adapter for Converting Luminosity Signals into Inductive Signals
Gene E. Olson - Kenosha, WI
Christopher B. Stout - Kenosha, WI
Donald D. Grover - Kenosha, WI
Thomas P. Becker - Kenosha, WI

USPTO Classifications:

Tool Categories:

Snap-On Tools Corp. - Kenosha, WI

Not known to have been produced

none listed

Patent Dates:
Applied: Jun. 06, 1983
Granted: Mar. 26, 1985

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Snap-On Tools Company History
Emrich & Dithmar - patent attorneys


The adapter includes a luminosity probe for replacing the glow plug associated with the selected cylinder in a diesel engine, a timer circuit responsive to inception of each electrical signal generated by the luminosity probe to produce a timer signal. The timer signal is differentiated to produce a spike. A pickup loop receives the spike and produces an inductive signal for application to the clip of a spark-ignited-engine timing meter.

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