Method to prevent unauthorized use of cassette tape...

Details Method to prevent unauthorized use of cassette tape... Method to prevent unauthorized use of cassette tape...

E - Fixed Constructions

05

B

340/125, 352/20

E05B 73/00 (2006.01) G08B 13/06 (2006.01) G11B 33/00 (2006.01)

Patent

CA 1085943

ABSTRACT OF THE DISCLOSURE The invention relates to a method and device for preventing unauthorized use of cassette recorders in which a lock cylinder is adapted to provide an opening or locking movement by means of a transmission set to one or a plurality of locking members which cooperate with adjacent surfaces or grip parts in the tape recorder.

265741

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