| 摘要 |
900,507. Magnetic recording &c. heads. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 12, 1960 [Jan. 15, 1959], No. 1093/60. Class 40 (2). Individual heads are assembled from asymmetrical part-cores 3, 4 to provide a reference surface 6, continuous with the gap 5 by means of which the heads may be stacked in alignment. In Fig. 3, the asymmetry is provided inside the head and provides alignment in two directions with respect to a bar 17 common to the stack. The heads may have fused glass gaps as described in Specification 897,123, the outer surface of the assembled head being ground after assembly. Screening plates may alternate with heads in the stack. |
