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Flexible Disk Pack Splitter Arm Accessing Mechanism

IP.com Disclosure Number: IPCOM000087616D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

King, FK: AUTHOR [+2]

Abstract

This mechanism includes an access or splitter arm 10 that is constrained to move into a stack of flexible disks 12 held in slightly spaced relation to each other on a vertically disposed drive shaft 14, with the movement of access arm 10 being at an angle a which is less than 90 degrees with respect to the vertical axis 14a of shaft 14 and at a relatively small complementary angle b with respect to the horizontal direction which is, of course, 90 degrees with respect to the vertical axis 14a of shaft 14.

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Flexible Disk Pack Splitter Arm Accessing Mechanism

This mechanism includes an access or splitter arm 10 that is constrained to move into a stack of flexible disks 12 held in slightly spaced relation to each other on a vertically disposed drive shaft 14, with the movement of access arm 10 being at an angle a which is less than 90 degrees with respect to the vertical axis 14a of shaft 14 and at a relatively small complementary angle b with respect to the horizontal direction which is, of course, 90 degrees with respect to the vertical axis 14a of shaft 14.

When flexible disks 12 are mounted on vertical drive shaft 14, each disk 12 droops downwardly from its center to its outer edge at an angle c due to the gravitational field forces and the shape of the disks. The conventional way of accessing a splitter arm 10 into the stack of flexible disks is by moving the arm into and out of the disk pack perpendicularly to the drive shaft 14. Due to the fact that access arm 10 has a relatively thin tip 10a and decreases in thickness to its tip 10a, access arm 10 splits a pair of the disks 12 and enters between them. Magnetic transducer 16 is preferably carried on the lower surface of access arm 10 for a data transferring action with respect to one of the pair of disks 12 between which the access arm 10 moves. However, due to the fact that access arm 10 in conventional disk drives moves perpendicularly to axis 14a rather than closer to the drooping position of disks 12 at their outer edges, tip 10a of the access arm has a plowing action with respect to disks 12, with an undue abrading of disks 12, transducer 16 and access arm 1...