Magnetic tape cassette

Details Magnetic tape cassette Magnetic tape cassette

1981-09-22

1983-10-11

Gilreath, Stanley N.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242204, G11B 1532

Patent

active

044087330

ABSTRACT:
A magnetic tape cassette in which unwinding of the tape is prevented independent of the type of hub utilized. Each of the two hubs of the tape cassette includes a first cylindrical wall in which is formed a shaft hole adapted to receive a rotary drive shaft of the tape unit with which the cassette is used. A second cylindrical wall is formed coaxially with the first cylindrical wall and the second cylindrical wall has an engaging groove formed in an interior surface thereof. Also provided is a locking device including a crosswise locking member provided on the bottom of the lower half of the cassette case between the two hubs. The locking member includes a straight bar and arm with locking pawls substantially in the form of a cross and a spring member. The locking member is movable back and forth in the longitudinal direction of the straight bar and urged in one direction by the spring so that rotation in at least one direction of the hubs is stopped by engagement of the locking pawls with the engaging grooves.

REFERENCES:
patent: 2206032 (1938-08-01), Foster
patent: 3259331 (1963-08-01), Liddle

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