Changeover mechanism for the magnetic heads or pinch rollers of

Details Changeover mechanism for the magnetic heads or pinch rollers of Changeover mechanism for the magnetic heads or pinch rollers of

1979-11-28

1982-01-05

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 75, 360 961, G11B 554, G11B 2122

Patent

active

043097332

ABSTRACT:
A changeover mechanism for the magnetic heads or pinch rollers comprises a pair of first movable levers, each of which is provided with a lever gear which is engaged with a reel gear and on the surface of which a stopper is mounted, a pair of electromagnetic solenoids, in each of which a movable rod is pulled outward upon receipt of a signal denoting to arrival of the end of a tape for engagement with the stopper of the lever gear to brake the rotation of the lever gear, thereby preventing the rotation of the lever gear itself and effecting the revolution of the lever gear about the reel gear for the drive of the first lever. The changeover mechanism further comprises a pair of second levers which is connected to the first lever, and, at the drive of the first lever, is rotated for engagement with the swingable magnetic head support board or pinch roller support board to rock it, thereby effecting the selective operation of the paired magnetic heads on the paired pinch rollers among themselves. Power required to swing the magnetic head support board or pinch roller support board is supplied by a motor through the reel gear, and the selective operation of the magnetic heads or pinch rollers among themselves is carried out simply by braking the rotation of the first lever upon receipt of a changeover instruction.

REFERENCES:
patent: 3781019 (1973-12-01), Kikuchi
patent: 3810240 (1974-05-01), Nozawa
patent: 4214283 (1980-07-01), Fushimi et al.

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