Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1976-09-07
1978-07-18
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
310 62, 360 97, 346137, G11B 1732, G11B 2504
Patent
active
041019458
ABSTRACT:
A drive spindle assembly for a disc recorder, and particularly one using a rigid disc, having a direct-coupled spindle shaft arrangement which includes a disc-support platform mounted concentrically at one end of the spindle shaft and a DC motor attached to the other end of the spindle shaft, which spaced bearings supporting the shaft medially between the motor and the support platform. Preferably, the motor is of the flat, compact printed circuit-rotor type known as a "pancake" motor, and the disc-support platform preferably incorporates air-impelling vanes on one side and bleed orifices extending through it, so that air is drawn along the spindle assembly to cool it, and then impelled outwardly over both sides of the recording disc to help aerodynamically fly the recording heads on a thin film of air over the surface of the disc.
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patent: 3225338 (1965-12-01), Kelner et al.
patent: 3427483 (1969-02-01), Selitrennikoff
patent: 3643119 (1972-02-01), Lukens
patent: 3740735 (1973-06-01), Gabor
patent: 3864748 (1975-02-01), Herdman et al.
patent: 3882335 (1975-05-01), Fries
patent: 3969767 (1976-08-01), Griffiths et al.
patent: 4019204 (1977-04-01), Griffiths et al.
Eddleman Alfred H.
Sycor, Inc.
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