Rotating memory accessing mechanism

Details Rotating memory accessing mechanism Rotating memory accessing mechanism

G - Physics

11

B

352/21.33

G11B 5/52 (2006.01) G11B 5/54 (2006.01) G11B 5/55 (2006.01)

Patent

CA 1055154

ROTATING MEMORY ACCESSING MECHANISM Abstract of the Disclosure A system for recording and reproducing data streams in continuous or segmented form on a rotating buffer memory comprises a pair of head accessing mechanisms that are alternately shifted from track to track in synchronism with the rotation of the disk, such that one head is always available for data transfer. The mechanism provides high speed, but stable, shifting between tracks, by a cam arrangement driven by a stepping motor and in turn controlling the head accessing mechanism. The cam comprises a low mass, low inertia disk having a peripheral cam surface with a periodic progression of alternating dwell and ramp portions spaced in accordance with the stepping motor increments. Flexural members urge support devices for the head mechanisms in a direction to maintain cam followers in engagement with the cam surface and insure precise head positioning while filtering out vibrations and eliminating resonances induced by the stepping motor and associated system.

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