Magnetic recording disk cartridge

Details Magnetic recording disk cartridge Magnetic recording disk cartridge

1983-07-22

1985-07-16

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

G11B 1504

Patent

active

045300178

ABSTRACT:
A magnetic recording disk cartridge is provided with an opening in its casing and a swingable erasing preventing unit inside the casing which can assume an open position in which a probe in the device in which the cartridge is used can enter the opening to detect that the cartridge is in an erasing prohibited condition or a closed position in which the probe is prevented from entering the opening to detect that the cartridge is in an erasing permitted condition. The erasing preventing unit has a detent which holds it in the open position until released by two coordinated actions and a lockarm which holds it in the closed position until pushed with the finger, thus precluding misoperation.

REFERENCES:
patent: 3828363 (1974-08-01), Somers
patent: 3848265 (1974-11-01), Biery et al.
patent: 4044386 (1977-08-01), Sarou et al.
patent: 4320422 (1982-03-01), Rinkleib

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