Importance

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Abstract

An engine life counter electrically connected to an engine restart switch through a power source of an engine. The counter includes a mechanical type counter having a coil; a quartz crystal oscillating at a stable frequency; a frequency demultiplier having an output terminal and a reset input terminal. The frequency demultiplier is connected to the quartz crystal to produce a standard frequency output. A stabilizing circuit is connected between the power source and the reset input terminal to stabilize and filter power from the power source. A transistor circuit is connected to an input of the coil and the output terminal of the frequency demultiplier for producing a series of pulses in cooperation with the frequency demultiplier. The pulses magnetize the coil at predetermined intervals. When the restart switch is actuated to start the engine an output from the output terminal of the frequency demultiplier produces a first pulse through the transistor circuit after 32 seconds to magnetize the coil and thereafter produces a pulse through the transistor circuit which magnetizes the coil every 36 seconds until the engine is switched off. The first pulse thereby increases the accuracy of the counter when the engine is restarted.

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First Claim