Method and apparatus for improved thermal isolation and stabilit

Details Method and apparatus for improved thermal isolation and stabilit Method and apparatus for improved thermal isolation and stabilit

1988-11-14

1990-12-25

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 3314

Patent

active

049807862

ABSTRACT:
A thermally independent dedicated servo disk drive where the temperature is kept within an acceptable range and temperature gradients that can cause differential thermal expansion are eliminated to minimize off tracking due to differential thermal expansion of thermally sensitive components. A novel isolated "box within a box" architecture is utilized to provide a thermal buffer to external temperature gradients and an inner HDA support structure is coupled to an outer housing with thermally insulative isolators which prevent the conductive transfer of heat from external sources where the outer housing and isolators create a thermal buffer to shield the inner HDA support structure from external heat sources. In addition, certain heat generating components not integrated into the symmetrical thermal "box within a box" design are isolated where possible. Thus, a thermally symmetrical environment is provided in the area of thermally sensitive components that could otherwise degrade tracking during temperature transients.

REFERENCES:
patent: 3577133 (1971-05-01), Garfein et al.
patent: 4367503 (1983-01-01), Treseder
patent: 4553183 (1985-11-01), Brown et al.
patent: 4620248 (1986-10-01), Gitzendanner
patent: 4796121 (1989-01-01), Adamek et al.
patent: 4831476 (1989-05-01), Pisczak
IBM/TDB, vol. 27, No. 11, Apr. 1985, p. 6588, "Seal for a Hermetically Sealed Disk File".

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