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Low Cost High Capacity Magnetic Disk Storage File

IP.com Disclosure Number: IPCOM000081208D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 3 page(s) / 119K

Publishing Venue

IBM

Related People

Billings, RA: AUTHOR [+3]

Abstract

This disk storage file comprises outer casings 10 and 11 and a cover 12 with two slots 14 and 16 therein, each of which is arranged to receive a disk assembly 18, so that a reading or writing action may be taken with respect to either one of the disk assemblies, or with respect to both of them simultaneously.

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Low Cost High Capacity Magnetic Disk Storage File

This disk storage file comprises outer casings 10 and 11 and a cover 12 with two slots 14 and 16 therein, each of which is arranged to receive a disk assembly 18, so that a reading or writing action may be taken with respect to either one of the disk assemblies, or with respect to both of them simultaneously.

A disk assembly 18 comprises a magnetic disk 20 disposed within a square envelope 22. Disk 20 is of a thin, flexible material and has a magnetic coating on both sides. Envelope 22 is of a relatively rigid sheet material. Disk 20 and envelope 22 have concentric central openings 24 and 26, and envelope 22 has radially extending slots 28 in its two thicknesses.

Shaft 30, which is rotatably mounted in frame 32 fixed with respect to casings 10 and 11, has disk drive rims 34 and 36 on opposite ends. Shaft 30 is driven from drive motor 38 by pulley 40, which is part of shaft 30, and belt 42. A pair of arms 44 and 46 are swingably mounted on fixed frame 32 and, respectively, carry rotatable collets 48 and 50 adapted to cooperate with drive rims 34 and 36, to grip a disk 20 there-between and to drive the disk. Springs 52 provide yielding connections between collets 48 and 50 and arms 44 and 46. Cams 54 and 56, respectively, cooperate with arms 44 and 46 for moving the respective collets 48 and 50 into disk driving relationship with respect to rims 34 and 36. Cams 54 and 56 are carried on shafts 58 rotatably mounted in casings 10 and 11, and each cam has an actuating lever 60 on its upper end.

A carriage 62 has four read/write heads A, B, C and D fixed thereon and a lead screw 64 driven from a stepper motor 66 extends through carriage 62 for moving carriage 62 vertically. A U-sha...