| 摘要 |
1,247,304. Transformers. TAIYO YUDEN K.K. 13 Aug., 1969 [15 Aug., 1968; 17 Oct., 1968], No. 40445/69. Heading H1T. [Also in Division H4] A compensating arrangement for use in compensating for pin-cushion distortion in television receivers comprises an insulated case 15, an open magnetic circuit provided by a flanged ferrite core 5, permanent magnet means 12, 13 providing a biasing flux # longitudinally in the core adjustable by means of screws 17, and two transformers A, B, wound with their primary windings connected in series and secondary windings 10, 11 connectable together in series opposition so that a current passed through the secondary winding can provide in combination with the biasing flux a saturable reactor effect at one of the transformers depending upon the direction of that current. When used to compensate for top and bottom pin-cushion distortion in a television, the vertical deflection current passing through the secondary coil is modified by the horizontal deflection current flowing in the primary by an amount of modification controlled by the magnitude of both currents. Adjustment of the biasing flux allows the amount of compensation with respect to the top and bottom distortion to be varied. In a modification (Fig. 6, not shown), the adjustment of the biasing flux is performed by using a rotatable cylindrical magnet (14) to influence a standing flux (#) set up by the permanent magnets (12, 13). |
