Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Patent
1975-12-22
1977-11-08
Kilgore, Robert M.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Tape record
235454, 360 74, G11B 1548, G06K 714, G11B 508
Patent
active
040578399
ABSTRACT:
A drive for a magnetic tape cassette. Edge and corner blocks mounted on a planar frame receive the leading edge of a magnetic tape cassette adjacent the corners thereof and position the cassette with respect to drive spindles which engage tape reels in the cassette and to a transducer located with respect to the blocks. The cassette has a notch offset from the center in the railing edge thereof. In one of two operating positions of the cassette, the notch registers with a switch, so the switch is not actuated. In the other position, the bottom surface of the cassette actuates the switch. A second switch registers with a selectively plugged recess in the trailing edge of the cassette thereby to enable or disable writing operations. A light source, disposed in the frame, transmits light along a first axis toward a detector housing. A prism in the housing intercepts and redirects the light toward a photosensitive detector. The tape interrupts the light beam except when an aperture in the tape passes the detector.
REFERENCES:
patent: 3231861 (1966-01-01), French
patent: 3443109 (1969-05-01), Broom
patent: 3536894 (1970-10-01), Travioli
patent: 3583708 (1971-06-01), Prager
patent: 3584882 (1971-06-01), Krtous
patent: 3619625 (1971-11-01), Wood
patent: 3653601 (1972-04-01), Wrona
patent: 3685171 (1972-08-01), Kosaka
patent: 3925817 (1975-12-01), Althuber
Kilgore Robert M.
MFE Corporation
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