Method and apparatus for timing light calibration

Details Method and apparatus for timing light calibration Method and apparatus for timing light calibration

1976-08-16

1977-12-13

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 15, 324 16S, F02P 1700

Patent

active

040631524

ABSTRACT:
Method and apparatus is disclosed for calibrating a timing light used in conjunction with an engine scope tester. The timing light is fired by an offset circuit in an engine scope tester having a meter indicating the offset amount. The engine scope tester is synchronized to the firing of a simulated No. 1 cylinder spark plug. The light from the timing light is detected by a phototransistor connected to a voltage reference source which amplifies the signal from the phototransistor to a usable level. The output of the voltage reference source is connected back to a vertical deflection circuit of the oscilloscope on the engine scope tester. The calibration marks on the oscilloscope of the engine scope tester are used to calibrate the meter on the engine scope tester indicating the offset to the timing light.

REFERENCES:
patent: 3364418 (1968-01-01), MacCrea
patent: 3573609 (1971-04-01), Vaher
patent: 3697865 (1972-10-01), Smith et al.
patent: 3727124 (1973-04-01), Kahen
patent: 3781656 (1973-12-01), Glew

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