Abstract: An ignition device for starting an internal combustion engine surely, having a starting member arranged on a rotor of a manual starter or a self-starter motor, the starting member being engaged with an actuating member of a piezoelectric element, an output terminal of which is electrically connected to a magneto ignition system.

Abstract: Confirmation of the existance of the proper operating conditions of a power tool is obtained by providing confirmation sensing means for sensing and confirming inspection and verification of the appropriate condition of each one of a plurality of preset operating conditions by the user, a confirmed state judging means for receiving the output of the completed confirmation sensing means and judging what operating conditions have been completely inspected and verified; a confirmation instructing means for informing the user of those operating conditions yet to be inspected and verified in response to the output of the confirmed state judging means; and, switching means for receiving the output of the confirmed state judging means and thereby allowing energization of the igniting circuit of the engine only after confirmation of all the preset operating conditions are completed and met.

Abstract: This invention relates to a contactless ignition circuit for internal combustion engines characterized in that a primary short-circuiting current flowing through the primary winding of an ignition coil is made to flow through a power transistor controlled to be conducted and interrupted by a photoswitching means, the formation is small and simple, the contact is not worn and the life is long.