Browse Prior Art Database

Magnetic Recording Disk Track Access Mechanism

IP.com Disclosure Number: IPCOM000082028D
Original Publication Date: 1974-Sep-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Granger, LA: AUTHOR [+2]

Abstract

This track access mechanism accurately locates a read/write head 10 on the surface of a magnetic disk 12, by driving head 10 through a pair of metal bands 14 and 16 from a drive motor 18.

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Magnetic Recording Disk Track Access Mechanism

This track access mechanism accurately locates a read/write head 10 on the surface of a magnetic disk 12, by driving head 10 through a pair of metal bands 14 and 16 from a drive motor 18.

Referring to Fig. 1, head 10 is fixed on carriage 20 that is slideably disposed on fixed guide rods 22. Band 16 extends around lower peripheral surfaces of pulleys 24 and 26 and has its ends fixed to these pulleys. Carriage 20 is fixed with respect to band 16. Band 14 extends around the upper peripheral surfaces of pulleys 28 and 30 and has its ends fixed to these pulleys. Pulleys 26 and 30 are fixed on shaft 32 which is journaled in a stationary part 34. Pulleys 24 and 28 are fixed on shaft 36 driven by motor 18.

Motor 18 is preferably of the stepping type of electric motor and steps shaft 36 and pulleys 24 and 28 in desired rotative steps. Band 16 moves with pulley 24 and moves head 10, through carriage 20, in corresponding steps across the surface of disk 12 so that head 10 registers with corresponding discrete concentric data tracks on disk 12.

The opposite direction of winding of bands 14 and 16 on their respective pulleys and the fastening of the ends of the bands to these pulleys provides a driving connection between motor shaft 36 and carriage 20 without lost motion, and insures a positive controlled movement of head 10 on the surface of magnetic disk 12.

As shown in Fig. 2, wire cables 40 and 42 may be utilized in place of...