Secrecy-coded cassette

Details Secrecy-coded cassette Secrecy-coded cassette

1981-06-16

1983-09-27

Christian, Leonard D.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

206389, G03B 104, G11B 1532

Patent

active

044064268

ABSTRACT:
A coded cassette for magnetic tape, film and the like, has a clutch mechanism which prevents transport of the record medium unless a complementally-coded key, as a part of the drive mechanism, is engaged therewith for operating the clutch to an unlocked condition.

REFERENCES:
patent: 3422740 (1969-01-01), Nerwin
patent: 3700316 (1972-10-01), Kurechi
patent: 3908930 (1975-09-01), Gresens
patent: 4023194 (1977-05-01), Batter, Jr.
patent: 4339776 (1982-07-01), Langer et al.

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