Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1987-06-09
1989-02-14
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record medium
In container
360 60, G11B 2302, G11B 1504, G11B 1904
Patent
active
048050610
ABSTRACT:
A write protect mechanism is disclosed for a cartridge of the type having top and bottom plates and an information recording medium interposed therebetween. The write protect mechanism comprises a button visible through an aperture in one of the plates and slideably moveable in the aperture between a write protect position and a write enabled position. In the write protect position, an interfacing recording device is actuated to prevent recording so that information previously recorded on the disk will not be inadvertently erased. In the write enabled position, the recording device is actuated to record information on the disk. The button further has a flag adapted to extend into a gap in a rear peripheral wall joining the top and bottom plates to visibly indicate that the button is in the write protect position and that information can not be recorded on the medium. When the flag is retracted, this visibly indicates that recording, if not prevented, could inadvertently erase previously recorded information.
REFERENCES:
patent: 4041537 (1977-08-01), Kishi
patent: 4507692 (1985-03-01), Sasaki
patent: 4536812 (1985-08-01), Oishi et al.
Champagne Patrick J.
Rowden David L.
Monteith Dennis P.
Verbatim Corp.
Wolff John H.
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