| 摘要 |
The apparatus includes at least two magnetic heads (M'1,M'2). The magnetic circuit which closes the flux path has a region (12) common to both two magnetic heads. One pole (P'2) magnetically couples the common region to the air gap (4'1) through an non-magnetic coupling (50). A second pole (P'3) of a second type is separated from the first pole (P'2) by a non-magnetic region (4'2). The common region is coupled to the air gap (4'2) of the second magnetic head (M'2). The thickness of the surface of the non-magnetic region (52) is such that the first pole and the second pole contribute toward the selective operation of either the first head or the second head. <IMAGE> |
