| 摘要 |
<p>A transducer core comprises a magnetic core superposed and integrally joined with a supporting composite body. The magnetic core has poles defining at least one nonmagnetic gap therebetween. The composite body has a nonmagnetic front portion spanning the nonmagnetic gap of the superposed magnetic core and a contiguous magnetic back portion. The superposed magnetic core and composite body are provided with overlapping grooves forming a window adapted to receive transducer windings. According to the preferred method of manufacturing the magnetic transducer of the invention, two complementary blocks of magnetic material are bonded together at confronting surfaces thereof to define a nonmagnetic gap therebetween. Prior to bonding, the confronting surface of one of the blocks is grooved along one of its dimensions. The resulting magnetic block is sliced in the plane of the groove to form a plurality of individual magnetic cores. A second magnetic block is provided with a longitudinal groove extending into the block from an upper surface thereof. A nonmagnetic block is bonded to the upper surface of the second magnetic block. The resulting composite block is sliced in the plane of the longitudinal groove to form a plurality of composite bodies of a size corresponding to the magnetic cores. Each magnetic core is superposed with a composite body and bonded thereto with the nonmagnetic gap adjacent to and spanned by the nonmagnetic block portion and with the respective grooves overlapping to form a window. The exposed planar surface of the superposed magnetic core is lapped until its width is reduced to correspond to a desired record track width. The transducer core is provided with a transducer winding passing through the window formed by the overlapping grooves.</p> |
