Method to prevent unauthorized use of cassette tape recorders and a device according to the method
OwnerRaymond J. Gottoinventor
Life of this patent
Estimating the term…
Abstract
A method and a device to prevent unauthorized use of cassette tape recorders, comprising of a cassette shaped part, insertable into a cassette tape recorder through the cassette opening, said part being arranged with locking means, thus enabling the part to take up an interlocked relationship with the cassette tape recorder when inserted into same.
Claims19
A device for preventing unauthorized use of a cassette tape recorder comprising a hollow body having a substantially flat rectangular outer casing corresponding in size and shape to a standard tape recorder cassette and locking means associated with said body for locking said body in a cassette opening of a tape recorder by engagement of a part of said locking means with a part of said tape recorder within said cassette opening, said locking means including means defining a lock opening in said casing, a rotary lock cylinder having a keyhole accessible from the exterior of said casing, a movable locking member within said casing having projected and retracted positions with respect to said lock opening and transmission means within said casing connected between said lock cylinder and said locking member for converting rotation of said cylinder into projecting and retracting movements of said locking member with respect to said opening.
A device for preventing unauthorized use of a cassette tape recorder comprising a hollow body having a substantially flat rectangular outer casing corresponding in size and shape to a standard tape recorder cassette and locking means associated with said body for locking said body in a cassette opening of a tape recorder by engagement of a part of said locking means with a part of said tape recorder within said cassette opening, said casing including top and bottom walls and a shallow side wall and said locking means including means defining a lock opening in said side wall, a rotary lock cylinder having a keyhole accessible from the exterior of said casing, a movable locking member within said casing having projected and retracted position with respect to said lock opening and gear transmission means within said body connected between said lock cylinder and said locking member for converting rotation of said cylinder into projecting and retracting movements of said locking member with respect to said opening.
Dependencies are inferred from the claim text.