Disc recording and/or reproducing apparatus including means for

Details Disc recording and/or reproducing apparatus including means for Disc recording and/or reproducing apparatus including means for

1989-09-19

1990-09-25

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360107, 360 9701, 360 86, 360 9904, G11B 552, G11B 2104, G11B 5012, G11B 1700

Patent

active

049597400

ABSTRACT:
A recording and/or reproducing apparatus for recording on and/or reproducing from a recording medium. The apparatus includes a head supported by a head mount movable in the radial direction of the recording medium and a head positioning member for displacing the head mount to position the head with respect to the recording medium. The head positioning member includes a shaft for rotating the recording medium about its axis of rotation and a cam which is rotatable about the shaft, the axis of rotation of the cam and recording medium being coincident and the rotation of the shaft being independent of the rotation of the cam. The cam is made of a material having a coefficient of thermal expansion substantially equal to that of the material of the recording medium.

REFERENCES:
patent: 3720930 (1973-03-01), Elsing
patent: 4164769 (1979-08-01), Kaseta et al.
patent: 4223359 (1980-09-01), Galvagni
patent: 4318144 (1982-03-01), Galvagni
patent: 4396959 (1983-08-01), Harrison et al.
patent: 4516177 (1985-05-01), Moon et al.
patent: 4665456 (1987-05-01), Mikamoto et al.
patent: 4802040 (1989-01-01), Komatsu et al.

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