Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1981-07-30
1983-12-06
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record medium
In container
206444, G11B 2504, G11B 582, B65D 8530
Patent
active
044197101
ABSTRACT:
A case for a disc-shaped recording medium is used in a disc-shaped recording medium reproducing apparatus. The reproducing apparatus is provided with a turntable for rotating the disc-shaped recording medium, closing member locking mechanism provided at the innermost part of the disc-shaped recording medium reproducing apparatus, and N detection switches provided at the innermost part of the reproducing apparatus and disposed asymmetrically on the left and right sides with respect to a line which passes through the center of the turntable in the disc insertion direction. The case comprises a jacket for accommodating the disc-shaped recording medium, and a closing member for closing an opening of the jacket and being locked by the locking mechanism and confront the detection switches upon the disc-shaped recording medium being loaded into the reproducing apparatus. The closing member has cutout desired areas symmetrical on the left and right sides each of which consists of N desired sections where cutouts for discrimination are to be formed. The cutout desired sections for discrimination at symmetrical positions on the left and right side are brought into confront the same detection switch out of the N detection switch when the closing member is reversed up and down together with the jacket and the disc-shaped recording medium. One cutout desired section out of the pair of cutout desired sections symmetrical on the left and right sides has a cutout or a non-cutout for discriminating peculiality of a first side of the disc-shaped recording medium, and the other cutout desired section having a cutout or a non-cutout for discriminating peculiality of a second side of the disc-shaped recording medium.
REFERENCES:
patent: 3662360 (1972-05-01), Lambert
patent: 4138703 (1979-02-01), Stave et al.
patent: 4164782 (1979-08-01), Stewart
patent: 4239108 (1980-12-01), Coleman et al.
patent: 4352175 (1982-09-01), Crooks
Abe Ryuzo
Sakurai Masaki
Sugiyama Hiroyuki
Yoshihara Kenji
Yusa Yasuhiro
Bernat Louis
Eddleman Alfred H.
Victor Company of Japan Ltd.
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