US 5,708,370 A · Depth sensor which detects grinding depth by means of change and resistance of resistor also ground during grinding

Abstract

A depth sensor for detecting a depth, when grinding the magnetic head in order to set the depth of the magnetic head to a predetermined length including an analog sensor having a resistor whose resistance changed continuously by being ground together with the magnetic head when grinding the magnetic head in a depth direction and for detecting the depth from said continuously changed resistance, and a digital sensor having a resistor whose resistance is changed non-continuously by being ground together with the magnetic head when grinding the magnetic head in the depth direction and for detecting the depth from the non-continuously changed resistance.

Claims8

Dependent claims

A depth sensor for detecting a depth, when grinding a magnetic head in order to set the depth of the magnetic head to a predetermined length, comprising:

an analog sensor having a resistor whose resistance is changed continuously by being ground together with the magnetic head when grinding the magnetic head in a depth direction and for detecting the depth from said continuously changed resistance;
and
a digital sensor having a resistor whose resistance is changed non-continuously by being ground together with the magnetic head when grinding the magnetic head in the depth direction and for detecting the depth from said non-continuously changed resistance.

Dependencies are inferred from the claim text.

Facts

Application

08/638,182Filed 26 Apr 1996

Priority

JP 7-10639428 Apr 1995

Granted

13 Jan 1998

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G11B 5/398
Using magnetic thin film layers or their effects, the films being part of integrated structures: specially shaped layers
G01N 17/00
Investigating resistance of materials to the weather, to corrosion, or to light
G01N 27/041
By investigating resistance: of a solid body
G11B 5/1871
Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap…:…

Depth sensor which detects grinding depth by means of change and resistance of resistor also ground during grinding

Life of this patent

Depth sensor which detects grinding depth by means of change and resistance of resistor also ground during grinding

Life of this patent

Abstract

Claims8