Browse Prior Art Database

Disk Memory

IP.com Disclosure Number: IPCOM000094926D
Original Publication Date: 1965-Jul-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Ruder, DJ: AUTHOR

Abstract

In this disk storage. a groove and pin arrangement mechanically guides a head along a recording surface and provides selective switching between adjacent tracks.

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Disk Memory

In this disk storage. a groove and pin arrangement mechanically guides a head along a recording surface and provides selective switching between adjacent tracks.

Magnetic recording tracks 10 comprise approximately concentric circles. Similar concentric grooves 11 are placed towards the center a specified distance from each track 10. Mounting 12 is arranged on stationary arm 13 and is adapted to freely slide longitudinally along it. Recording head 14 is fixedly attached to mount 12 as is guide pin 15 which is fixed a predetermined distance from head 14. Pin 15 rides in grooves 11 and thus controls the position of mount 12 along arm 13 so as to guide head 14.

Additional grooves 16 interconnect grooves 11. Pin 15, having an oblong cross-section, is controlled by solenoid 17 so that it is rotated slightly in either direction to deflect pin 15 into a groove 16. Thus, the apparatus allows switching of head 14 between tracks 10 without stepping motors or hydraulic addressing.

Alternatively, pin 13 can be deflected by a piezoelectric crystal, This can be electrically controlled to move pin 13 to one side of a track 11 or to twist pin 13 causing it to move into a groove 16. Pin 13 can also be deflected by grooves. the edges of which are permanently magnetized in opposite polarities. Pin 13 is then temporarily magnetized in either direction to attract it to one side of the track or another. Further, a magnetostrictive device can be controlled to twist or move p...