Apparatus and method for controlling magnetic head surface forma

Details Apparatus and method for controlling magnetic head surface forma Apparatus and method for controlling magnetic head surface forma

1975-08-07

1977-03-29

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51281R, B24B 4900

Patent

active

040141411

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. The number of head rotations is counted and head resistance is monitored by the bridge at predetermined counts. Head movement toward the abrasive is terminated when a predetermined head resistance is detected by the bridge.

REFERENCES:
patent: 3438155 (1969-04-01), Bouvier
patent: 3691695 (1972-09-01), Green

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