Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1994-06-02
1997-03-11
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9905, 360 9908, 360 9912, 369271, G11B 17028
Patent
active
056107790
ABSTRACT:
A floppy disk drive comprises a shaft connected to a rotary shaft of a motor, a rotating disk fixed on the shaft at a center thereof and having a concaved portion formed in a surface thereof and an aperture formed in the concaved portion so as to be opened to a back of the rotating disk, a plate swingably mounted on the rotating disk at a base end portion thereof by means of a pin within the concaved portion, an engaging pin provided at the other end of the plate so as to project over the surface of the rotating disk, and a spring serving to bias the plate radially outwardly of the rotating disk, wherein a center of the pin is arranged on a substantially straight line which passes through a center of the engaging pin and intersects perpendicularly to a straight line connecting the centers of the shaft and the engaging pin. The floppy disk drive may further comprise a biasing device by which the plate is biased toward one of the surface side and the back side of the rotating disk. The spring may be fitted and fixed in a spring receiving groove formed in the surface of the rotating disk.
REFERENCES:
patent: 4613921 (1986-09-01), Holmes
patent: 4855850 (1989-08-01), Nagaoka et al.
patent: 4873595 (1989-10-01), Taguchi et al.
patent: 4989107 (1991-01-01), Tsukahara
patent: 5121272 (1992-06-01), Maekawa et al.
patent: 5311383 (1994-05-01), Yokouchi
Korzuch William R.
Levy Stuart S.
Matsushita Electric - Industrial Co., Ltd.
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