| 摘要 |
PURPOSE:To obtain stable current superimposing characteristic by fixing a drum type core winding a coil to the terminal block where a female screw is provided at the center aperture, and engaging a screw type permanent magnet to said female screw moving forward or backward against the core. CONSTITUTION:A coil 11 is wound around the circumference of a drum type core 12, the one end thereof is fixed by bonding to a terminal block 14 where a female screw 17 is formed at the center and a lead wire 15 of coil 11 is connected to a terminal pin 16 provided at the rear surface of terminal block 14. Next, a screw type permanent magnet 13 is engaged with the female screw 17 of terminal block 14 and this is placed near to or far from the lower part of core 12 along the female screw 17. As described above, fluctuation of core 12 can be absorbed making unnecessary adjustment of number of turns of coil 11 only by moving the magnet and the characteristic is matched to the center value. Thereby a linearity coil having uniform characteristic can be obtained. |
