Dwell measuring apparatus

Details Dwell measuring apparatus Dwell measuring apparatus

1977-04-21

1978-05-30

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 1342

Patent

active

040925846

ABSTRACT:
The disclosure describes an improved apparatus for measuring the dwell of an engine ignition system employing points which close to conduct current through a coil and which open to generate an ignition signal. The apparatus enables the pointer of a meter to move upscale for increasing dwell, thereby simplifying the reading of the meter. A shaping circuit shapes the ignition signal to form a charging pulse which stores energy in a charging capacitor. When the points are closed, the energy stored in the capacitor is transmitted through the meter by a switching circuit so that the pointer advances away from its zero position as the dwell of the ignition system increases.

REFERENCES:
patent: 2056416 (1936-10-01), Allen
patent: 3543143 (1970-11-01), Wanninger
patent: 3693073 (1972-09-01), Colette

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