Patent ID: 8689756

Claim:
A manually operable device with a combustion engine, comprising a digitally controlled magnetic ignition circuit ( 11 , 40 ) comprising a stop connection ( 18 , 53 , 66 , 79 , 91 , 104 ) assigned to a stop switch ( 80 ), wherein the magnetic ignition circuit ( 11 , 40 ) is embodied for generating and applying at least one voltage pulse, which provides a cleaning effect for the stop switch ( 80 ), to the stop connection ( 18 , 53 , 66 , 79 , 91 , 104 ), and wherein the magnetic ignition circuit ( 11 , 40 ) is embodied for generating a voltage wave series ( 22 ) from half waves ( 31 - 36 ) having a temporally decreasing amplitude, or for generating at least one voltage pulse in a medium voltage range of 12 V to 50 V, characterized in that, if a voltage wave series ( 22 ) having a temporally decreasing amplitude is generated, the magnetic ignition circuit ( 11 , 40 ) is embodied for applying at least one later half wave ( 32 - 36 ) in the voltage wave series ( 32 ), which half wave follows the first half wave ( 31 ) temporally and therefore has a lower amplitude, as a voltage pulse to the stop connection ( 18 , 53 , 66 , 79 , 91 , 104 ), or in that, if at least one voltage pulse in a medium voltage range of 12 V to 50 V is generated, the magnetic ignition circuit ( 11 , 40 ) is embodied for applying the one or more voltage pulses to the stop connection ( 18 , 53 , 66 , 79 , 91 , 104 ), and thereby exerts a cleaning effect on the stop switch ( 80 ).