Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1988-03-21
1989-07-25
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360128, G11B 554
Patent
active
048519430
ABSTRACT:
An improved head loader is disclosed for use in assembling hard disk drives to permit the placement of magnetic heads over desired tracks of the magnetic disks. The loader includes a main frame, through which is disposed a shaft. The shaft passes through the frame and is secured to a positioning piece which includes an upwardly extending guide pin, and a downwardly extending positioning pin. A guide piece having a plurality of guides is rigidly attached to the frame. In operation, spreading blades pass through the guides and separate the magnetic heads on an actuator arm to permit the movement of the actuator arm to a position over desired areas of the magnetic disks, without the magnetic heads contacting the disks and causing damage. The loader is configured such that a user inserts the positioning pin through concentric holes in the actuator arm, and places a nub which is the remaining portion of the shaft passing through the positioning piece, into another triangular orifice in the uppermost arm comprising the actuator arm. The user first swings the loader into place by pressing against the handle maintaining his grip on the handle and then rotating it. The spreading blades are then forced through the guide over a nylon roller such that they diverge at an angle. The structure of the present invention is such that once properly positioned, the diverging blades contact flexible arms carrying the magnetic heads on the actuator arm. The blades force adjacent flexible arms to come in contact with one another, and thereby spread the magnetic heads. The assembler may then rotate the actuator arm until the magnetic heads are disposed over a desired position on the magnetic disks. By counterrotating the handle, the spreading blades are retracted back into the guides and the loader is returned to its initial position, such that it can be removed from the actuator arm.
REFERENCES:
patent: 3702997 (1972-11-01), Jamieson
patent: 4392165 (1983-07-01), Wright
patent: 4644429 (1987-02-01), Boe
Maxtor
Sniezek Andrew L.
Tupper Robert S.
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