公开(公告)号：US3921340A

公开(公告)日：1975-11-25

申请号：US45013974

申请日：1974-03-11

Applicant: IBM

Inventor： JOHNSON LARRY A ,  ROBINSON NEIL L ,  STRANG RICHARD H ,  VAIR GARY G

IPC: G11B5/23 ,  G11B5/187 ,  G11B5/39 ,  B24B49/10

CPC classification number: G11B5/39

Abstract: A head is moved toward and rotated against an abrasive while its resistance is monitored by a four-lead bridge. Two leads from the head are connected to two slip rings, and each slip ring has two pairs of brushes, each wire from the bridge going to a different brush pair. Head movement toward the abrasive is terminated when a predetermined head resistance is detected by the bridge.

Abstract translation: 头部被移动并旋转抵靠研磨剂，同时其电阻由四引线桥监测。 来自头部的两根导线连接到两个滑环，每个滑环具有两对刷子，每根电线从桥接到不同的刷子对。 当通过桥梁检测到预定的头部电阻时，朝向磨料的头部移动终止。