Device for detecting irregular operative situations, particularl

Details Device for detecting irregular operative situations, particularl Device for detecting irregular operative situations, particularl

1980-03-18

1982-07-27

Christian, Leonard D.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242199, B65H 5938, G03B 102, G11B 1513

Patent

active

043413641

ABSTRACT:
A device for detecting irregular operative situations, particularly for tape decks, serves to detect the rotational state of one of the two discs only. In fact, the rotational state of only one of the two discs carrying the hub for the tape reels implies tape breaking and for this reason the cassette must be ejected or the transport motor must be deenergized. Two motion detectors 11A and 12A, 11B and 12B for the two discs 13A and 13B have as output a logic level 1 if the corresponding disc is stopped while before it rotated or a logic level 0 if the corresponding disc is stopped while before it was stopped; an exclusive OR gate 15 has an inputs the corresponding outputs of two motion detectors, respectively, and the output of exclusive OR gate 15, being 1 when only one of two discs rotates while the other one is stopped, detects an irregular operative situation.

REFERENCES:
patent: 3730453 (1973-05-01), Hotchkiss et al.
patent: 3879756 (1975-04-01), De Bell et al.
patent: 4114830 (1978-09-01), Hoshi et al.

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