Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1980-10-29
1982-12-07
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360102, G11B 1560
Patent
active
043630472
ABSTRACT:
The present invention relates to a rotary head assembly for a magnetic recording and reproducing device such as VTR. A stationary center shaft is mounted on the side of a stationary cylinder while a rotary sleeve which is fitted over said stationary center shaft for rotation about the axis thereof is disposed on the side of a rotary cylinder. A lubricating oil is injected between the rotary sleeve and the stationary center shaft so that a space between the cylinders may be utilized so as to provide a hydraulic bearing portion. Thus, the rotary head assembly may be made compact in size and to a higher degree of accuracy. In addition, the thrust load carrying point of the hydraulic bearing portion is located on the side of the rotary cylinder, and the portion adjacent to the thrust load carrying point has a sealing arrangement or construction so as to prevent the leakage of lubricating oil and to stabilize the rotation of the rotary cylinder.
REFERENCES:
patent: 3981024 (1976-09-01), Mo et al.
patent: 4031558 (1977-06-01), Kusada
Ichiyanagi Takashi
Maruyama Teruo
Matsushita Electric - Industrial Co., Ltd.
Wolff John H.
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