Tape cassette speed-release clutch

Details Tape cassette speed-release clutch Tape cassette speed-release clutch

1991-12-05

1994-04-19

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

In container

242199, G11B 2308

Patent

active

053051718

ABSTRACT:
A video tape cassette includes in one reel of the cassette a one-way, speed-release clutch. The clutch allows the tape, when inserted into a recording machine, to be moved in a forward direction at recording or playback speed, but not to be moved at "fast forward" speed. This prevents cassette users from skipping over parts of the recording, such as advertisements. Reverse motion of the tape is not affected. The clutch may be of any sort which releases or locks at high rotation rates; one embodiment includes a swinging arm which at high speeds is held out of engagement by centrifugal force thus freeing a tape reel, and at low speeds pushes on a pin to drive the reel. Another embodiment includes a swinging arm which at high speeds is swung into engagement with a stop pin thus locking the tape reel, and at low speeds does not engage the stop pin.

REFERENCES:
patent: 1745738 (1930-02-01), Carter
patent: 4406426 (1983-09-01), Crandall
patent: 4512535 (1985-04-01), Dickson
patent: 4632335 (1986-12-01), Dickson
patent: 4928905 (1990-05-01), Granzotto et al.
patent: 5005099 (1991-04-01), Perryman et al.

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