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US 4,156,839 AGranted
Spark plug tester
OwnerTorakichi Nakagawainventor
Life of this patent
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Abstract
A novel spark plug tester for testing the sparking voltage of a spark plug in an internal combustion engine for an automobile and other vehicles which is actuated with generation of proper pulsatile sparking voltage, said tester having an electrical circuit capable of checking the actuation of the plug to prevent erroneous indication.
Claims5
A spark plug tester comprising;
- a D-C high voltage generator;
- a series circuit including a high voltage resistant capacitor and a low impedance element connected with low voltage side of said capacitor, said circuit being connected at its one end to the output of the D-C high voltage generator through a resistor, and connected in parallel to a spark plug to be tested;
- an indicator showing a pulsatile voltage of relaxation oscillation generated across said series circuit;
- a rectifying circuit connected across said low impedance element;
- and
- a display device connected to the output of said rectifying circuit.
3 more elements
Dependencies are inferred from the claim text.