Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Patent
1974-11-14
1977-03-15
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Tape record
242 5519A, 242200, G11B 2304, G11B 2506, G11B 1500
Patent
active
040127907
ABSTRACT:
A record playback unit for recordings on magnetic tapes disposed both in endless loop formations in cartridges and in reel-to-reel cassettes, wherein both are insertable into a single opening in the playback unit. A transducer and drive wheel assembly for the tape of the cassette is normally positioned to be inserted into the opening in the edge wall of the cassette together with a drive wheel for the tape of the cassette.
When a cartridge is inserted, its upper forward edge is detected by a limit switch, which is not actuated by an inserted cassette. The limit switch controls a solenoid or motor causing the cassette drive and transducer assembly to retract out of the way of the cartridge, to permit the cartridge to be pushed fully into the housing and to engage the cartridge-contained tape with a drive wheel and transducer at the far end of the housing. When a magnetic tape cassette is inserted into the opening and pushed to the far end thereof, it operates a second limit switch which causes the solenoid to advance the cassette drive unit consisting of a rotatable member, which is inserted into the cassette behind the tape, to cooperate with a common drive wheel for both the cassette and cartridge tapes and also engages respective drive means for the reels of the tape in the cassette into engagement with the reel hubs of the cassette. Removal of the cassette from the opening is effected by pulling or pushing on the cassette, which activates a further limit switch or manually closing a further limit switch operating the solenoid to retract the cassette drive unit out of the way of the cassette, so that the cassette may be removed from the housing.
REFERENCES:
patent: 3385534 (1968-05-01), Staar
patent: 3542371 (1970-11-01), Saito
patent: 3561767 (1971-02-01), Negishi
patent: 3593946 (1971-07-01), Shardlow
patent: 3594008 (1971-07-01), Takagi
patent: 3624310 (1971-11-01), Mathey
patent: 3703295 (1972-11-01), Yamamoto
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