Device for detecting tape end of magnetic recording apparatus

Details Device for detecting tape end of magnetic recording apparatus Device for detecting tape end of magnetic recording apparatus

1980-05-08

1982-08-03

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

242188, 360 745, 360132, G11B 1500

Patent

active

043430244

ABSTRACT:
A video tape cassette of the type wherein a supply reel and a take-up reel are contained therein holds a magnetic video tape having transparent sections of tape at each end connected to a respectively one of the reels. A light-receiving element, or sensor, such as a phototransistor is incorporated into one of the positioning poles which enters into a cooperating opening in the cassette when it is put into position, and a light-emitting element, such as a light emitting diode is provided on the base outside of the cassette so that the end of the tape can be detected by the cooperative action of these two elements to automatically stop the running of the tape. Since the light-receiving element can be incorporated into the existing positioning pole, no additional space is required and the device can be incorporated into already existing video tape recorders. Obviously, the same results can be achieved if the phototransistor and light-emitting diode are interchanged.

REFERENCES:
patent: 3614453 (1971-10-01), Johnson
patent: 3751042 (1973-08-01), Platt
patent: 4091426 (1978-05-01), Umeda
IBM Tech. Disc. Bull., S. D. Roberts, Optimized Tape-Mark Detector, vol. 12, No. 12, May 1970, pp. 2354-2355.

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