| 摘要 |
PURPOSE:To output a transfer check signal so accurately only when a plunger transfers, by installing such a detection coil as being varied in conformity with a variation in the number of magnetic flux produced by transfer of the plunger. CONSTITUTION:When a plunger 22 is operated, flux of magnetic force is produced there by means of a coil 24. With this constitution, a detection coil 25 outputs detection voltage commensurated to the number of the magnetic flux. When the plunger 22 transfers and yet input voltage to the coil 24 is varied, there produces a difference between a coefficient of variation in the voltage to be inputted into an input terminal 32a and another coefficient of variation in the voltage to be inputted into a input terminal 32a. Therefore, a circuit 37 produces its output which is outputted from an output terminal 32c as a transfer check signal. |
