Ignition system for combustion-powered tool

Details Ignition system for combustion-powered tool Ignition system for combustion-powered tool

B - Operations, Transporting

25

C

B25C 1/12 (2006.01) B25C 1/08 (2006.01) F02P 3/08 (2006.01) F02P 9/00 (2006.01) F02P 11/00 (2006.01) F02P 11/04 (2006.01) F02P 11/06 (2006.01)

Patent

CA 2082181

For a combustion-powered tool, an ignition system is powered by a battery and is arranged so that a sudden discharge of a capacitor, as charged via an oscillator, produces a spark at a spark gap of a spark plug, so that the oscillator is enabled if a trigger switch is closed while a head switch is closed, but not if the trigger switch is closed while the head switch is opened, and if a battery voltage, as monitored, is not less than a reference voltage, and so that a silicon- controlled rectifier, which is arranged to produce a sudden discharge of the capacitor, is switched to a conductive state if the capacitor voltage, as monitored, and is not less than a reference voltage. The head and trigger switches, which are photoelectric, are polled intermittently to determine whether they are closed. Predominantly, solid-state components are used.

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