Dynamic magnetic information storage or retrieval – Miscellaneous
Patent
1993-11-29
1995-02-21
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Miscellaneous
G11B 2302
Patent
active
053921836
ABSTRACT:
A service cassette for simulating the presence of a conventional video tape cassette within a conventional video cassette recorder, player and camera wherein a retractable extending arm is provided for actuating a sensor that detects the presence and absence of an opaque magnetic video tape wherein the sensor is mounted beyond the frame structure of the service cassette within the video equipment. An extending arm is slidably connected to an end wall of at least one of the end members of a c-shaped frame structure of the service cassette. The slidable connection allows the extending arm to move between a retracted position and an extended position. When in the retracted position, the extending arm does not extend beyond the frame structure of the service cassette and does not actuate the sensor mounted beyond the frame structure of the service cassette within the video equipment. The retracted position provides the service cassette with the same size frame structure as a conventional video tape cassette for the accurate simulation thereof. When in the extended position, the extending arm extends beyond the frame structure of the service cassette to actuate the sensor mounted beyond the frame structure of the service cassette. The sensor may comprise a tension pole that pivots to engage video tape of a video tape cassette, or the sensor may comprise a photodetector that senses whether a beam of light passes through a clear or opaque section of video tape contained in a video tape cassette.
REFERENCES:
patent: 3860350 (1975-01-01), Rogers
patent: 4065801 (1977-12-01), Leaming
patent: 4337909 (1982-07-01), Harja
patent: 4470089 (1984-09-01), Hutchins et al.
patent: 4748526 (1988-05-01), Miyao et al.
patent: 5053906 (1991-10-01), Rayis
Korzuch William R.
Levy Stuart S.
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