公开(公告)号：US3832806A

公开(公告)日：1974-09-03

申请号：US30984372

申请日：1972-12-11

Applicant: INT COMPUTERS LTD

Inventor： WALKER P ,  SCARROTT G

IPC: B24B9/00 ,  B24B19/00 ,  B24B37/00 ,  B24B7/02

CPC classification number: B24B37/048 ,  B24B9/00 ,  B24B19/00 ,  B24B37/00

Abstract: Apparatus is disclosed for simultaneously lapping spaced parallel faces on a workpiece by means of an elongate lapping tool which has a plurality of spaced lapping faces. The lapping faces may be formed as a helical surface on the lapping tool so that rotation of the lapping tool results in the faces on the workpiece being lapped by a number of separate portions of the helical surface and results in the workpiece being moved along the lapping tool so that each face is lapped successively by a number of different portions of the helix.

Abstract translation: 公开了用于通过具有多个间隔的研磨面的细长研磨工具同时研磨工件上的间隔开的平行面的装置。 研磨面可以形成为研磨工具上的螺旋表面，使得研磨工具的旋转导致工件上的表面被螺旋形表面的多个分开的部分研磨，并导致工件沿着研磨移动 工具，使得每个面部被螺旋的多个不同部分依次搭接。

公开(公告)号：US3789158A

公开(公告)日：1974-01-29

申请号：US3789158D

申请日：1971-11-01

Applicant: INT COMPUTERS LTD

Inventor： WALKER P ,  HUMPOLETZ J

IPC: G11B5/105 ,  G11B5/17 ,  G11B5/193 ,  G11B5/31 ,  G11B5/60 ,  G11B5/12

CPC classification number: G11B5/193 ,  G11B5/105 ,  G11B5/17 ,  G11B5/31 ,  G11B5/60

Abstract: A magnetic recording head including a composite element formed by a inner layer of conductive material sandwiched between two layers of readily magnetisable material. A conductive outer layer is disposed over at least a portion of each magnetisable layer, these outer layers being electrically interconnected solely by the inner conductive layer.

Abstract translation: 一种磁记录头，包括由夹在两层易磁化材料之间的导电材料内层形成的复合元件。 导电外层设置在每个可磁化层的至少一部分上，这些外层仅由内部导电层电连接。