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Retarding Downward Velocity of Magnetic Disk Cartridge on Machine Loading

IP.com Disclosure Number: IPCOM000081677D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 3 page(s) / 50K

Publishing Venue

IBM

Related People

Hanson, CA: AUTHOR [+2]

Abstract

An overcenter spring 4, positioned between a stationary machine baseplate 13 and a pivotal machine cover 5, is in position to retard the dropping velocity of a magnetic disk cartridge 1 as the cartridge is dropped into the machine, and moves out of contact with cartridge 1 when cover 5 is moved toward baseplate 13 to close the machine.

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Retarding Downward Velocity of Magnetic Disk Cartridge on Machine Loading

An overcenter spring 4, positioned between a stationary machine baseplate 13 and a pivotal machine cover 5, is in position to retard the dropping velocity of a magnetic disk cartridge 1 as the cartridge is dropped into the machine, and moves out of contact with cartridge 1 when cover 5 is moved toward baseplate 13 to close the machine.

Cartridge 1 may be of the type disclosed in U. S. Patent 3,668,658, issued June 6, 1972, and which includes a round flexible magnetic disk 20 disposed within a square envelope 22. Disk 20 has a central opening 24 through it and envelope 22 has larger diameter central openings 26 in its two thicknesses. Reading and writing of data on disk 20 may be accomplished through elongated slots 28 provided in the two thicknesses of envelope 22, and any suitable drive mandrel passing through opening 24 may be used to drive disk 20 on reading or writing, when cover 5 is closed and cartridge 1 is disposed in the machine on registration ledge 3. Cover 5 is pivotally mounted at 6 with respect to baseplate 13 in order to have its closing motion (in direction A). A slot 2 is formed by baseplate 13 and a flange 21 fixed with respect to baseplate 13, for guiding disk assembly 1 onto registration ledge 3 when disk assembly 1 is dropped into slot 2.

Spring 4 is formed with a tab 7 and with reduced width connecting portions 10 and 11. Stud 12 is fixed to spring 7. A screw 30 fixes the end of spring 4 to cover 5, and spring 4 is bent at connecting portions 10 and 11 to be in the form illustrated in Fig. 1, so that when cover 5 is in opened position with respect to baseplate 13, the end of stud 12 is adjacent baseplate 13. Tab 7 rests on and is fixed at point 9 to rib 8 on cover 5, which maintains tab 7 under compression so that it assumes its curved shape shown in Fig. 1. The upper end 32 of spring 4 is bent backwardly with respect to baseplate 13 as shown i...