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Browse Prior Art Database

Multiple Head Loading Mechanism

IP.com Disclosure Number: IPCOM000074306D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

George, IC: AUTHOR [+2]

Abstract

The multiple head-loading mechanism shown consists of four parallel rotatable shafts 1, 2, 3 and 4 carrying magnetic head loading springs 5, 6, 7 and 8 which cooperate with the independently suspended recording heads 9, 10, 11 and 12. The four heads are positioned on opposite sides of two recording disks, not shown, and are urged towards the surfaces of the disks by the springs when the loading arms are rotated in the direction of the small curved arrows. The shafts 1, 2, 3 and 4 are linked together by gears, not shown, so that rotation of one shaft produces corresponding rotation in the correct sense of the other shafts. The shafts and heads are supported on a moveable carriage 13 which slides back and forth in actuator 14 to permit the heads to access the various traces on the disks.

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Multiple Head Loading Mechanism

The multiple head-loading mechanism shown consists of four parallel rotatable shafts 1, 2, 3 and 4 carrying magnetic head loading springs 5, 6, 7 and 8 which cooperate with the independently suspended recording heads 9, 10, 11 and 12. The four heads are positioned on opposite sides of two recording disks, not shown, and are urged towards the surfaces of the disks by the springs when the loading arms are rotated in the direction of the small curved arrows.

The shafts 1, 2, 3 and 4 are linked together by gears, not shown, so that rotation of one shaft produces corresponding rotation in the correct sense of the other shafts. The shafts and heads are supported on a moveable carriage 13 which slides back and forth in actuator 14 to permit the heads to access the various traces on the disks.

The loading operation starts with the carriage 13 retracted to the left-hand side of the actuator 14. Electromagnet 15 is energized to hold pivoted lever 16 in its upper position. Lever 16 carries a pin 18 which bears against the under surface of the pivoted cam 19 to support it in its operative position, as shown in the drawing. When the disks are running at the correct speed, carriage 13 starts to move from left to right in actuator 14 and load arm disk 20 on load arm 21 moves along the upper surface of cam 19. Load arm 21 is rigidly attached to shaft 4 which is caused to rotate as disk 20 moves up cam 19. Shafts 1, 2 and 3 also rotate and all four heads assume their loaded positions supported on the air bearings generated between them and the rotating disks. During this loading operation pin 22 on load arm 21 rides up the cam surface 24 of lever 23 which ...