Magnetic head drum apparatus having upper and lower stationary d

Details Magnetic head drum apparatus having upper and lower stationary d Magnetic head drum apparatus having upper and lower stationary d

1992-03-23

1994-05-31

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 84, 36013024, G11B 552, G11B 1561, G11B 2104, G11B 2118

Patent

active

053174666

ABSTRACT:
A magnetic head drum of a helical-scan type for video data recording and reading apparatus comprises upper and lower stationary drums securely mounted on a spindle, an intermediate member rotatably supported on the spindle between the drums, and a motor for rotating the intermediate member. The motor comprises a rotor secured to the intermediate member, a stator secured to the upper drum, and a back yoke connected with the rotor through a back yoke retainer such that the stator is interposed between the rotor and the back yoke. This arrangement of the magnetic head drum contributes to effective damping of an electromagnetic noise of the motor caused due to vibration of the stator and back yoke.

REFERENCES:
patent: 4564876 (1986-01-01), Takashi et al.
patent: 4641214 (1987-02-01), Imanishi et al.
patent: 4875110 (1989-10-01), Kazama et al.
patent: 5119257 (1992-06-01), Itou et al.

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