Magnetic disc cartridge having improved disc brake

Details Magnetic disc cartridge having improved disc brake Magnetic disc cartridge having improved disc brake

1982-12-20

1987-02-24

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

360 97, 360 99, 206444, G11B 2303, G11B 5012, G11B 5016, B65D 8530

Patent

active

046461922

ABSTRACT:
A disc of a magnetic disc cartridge is braked while the cartridge is outside of a receptacle of a magnetic disc memory unit by a radially extending leaf spring mounted on a wall of the cartridge so it has a free end engaging an aperture in a drive platter. The drive platter has an aperture that is engaged by a drive post of a drive disc connected to the memory drive shaft while the cartridge is inserted in the receptacle. The leaf spring is positioned so that the free end thereof is lifted out of the aperture by a post fixedly mounted on the memory unit to release the brake member while the cartridge is in place in the receptacle.

REFERENCES:
patent: 3643240 (1972-02-01), Raiser
patent: 3786454 (1974-06-01), Lissner et al.
patent: 3843967 (1974-10-01), Mulvany
patent: 3855623 (1974-12-01), Chu et al.
patent: 3864747 (1975-02-01), Pejcha
patent: 4040089 (1977-08-01), Guarracini
patent: 4078246 (1978-03-01), Berthoux et al.
patent: 4252328 (1981-02-01), Raj et al.
patent: 4320430 (1982-03-01), Vogt
patent: 4377830 (1983-03-01), Patel
patent: 4503474 (1985-03-01), Nigam
patent: 4521819 (1985-06-01), Elsing et al.
patent: 4532564 (1985-07-01), Larson et al.
patent: 4550355 (1985-10-01), Larson et al.
Design Ideas (Great Britain), Dec. 1978, p. 13, no author, "Ferromagnetic Fluid Sealing Protects Computer Information".
IBM Technical Disclosure Bulletin, vol. 20, No. 10, Mar. 1978, pp. 4104-4105, "Removable Media Disk File" by Fugate et al.

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