Magnetic head with a useable lifetime detection mechanism

Details Magnetic head with a useable lifetime detection mechanism Magnetic head with a useable lifetime detection mechanism

1996-06-12

1998-03-31

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head

Core

360120, 360137, 324262, G11B 5187, G11B 5455

Patent

active

057345350

ABSTRACT:
A magnetic head having a head unit for contacting a magnetic medium comprises at least a pair of magnetic cores which are arranged in the head unit which face each other on sides of a magnetic gap for recording and/or reproducing signals. A spacer is included for maintaining a space between one of the magnetic cores and another member, which may be the other magnetic core or a shield member. The spacer includes a usable life detection device for providing an indication of wear on the head unit which is interrupted when the head unit is worn down to predetermined depth. A device for electrically sensing an interruption of the indication is provided so that a usable lifetime of the head unit can be determined.

REFERENCES:
patent: 4926276 (1990-05-01), Orikasa et al.
patent: 5031064 (1991-07-01), Ashikawa et al.
patent: 5202806 (1993-04-01), Kawase
patent: 5291364 (1994-03-01), Saito
patent: 5363267 (1994-11-01), Fang
patent: 5495371 (1996-02-01), Munemoto et al.

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