WIRE PUZZLE Russian patent published in 1998 - IPC

FIELD: entertaining toys facilitating development of spatial imagination. SUBSTANCE: wire puzzle has members movable one relative to another, two axially aligned rings of different diameter, each carrying two sets of arced members. Ends of arced members are secured to rings so as to provide synchronous rotation of set about related ring. Opposite arced members arranged between rings are connected by flexible sleeves. Geometrical sizes of movable members satisfy the following ratio: , where R is radius of large ring; r is radius of small ring; H is height of arced member of large ring; h is height of arced member of small ring; A is height of attachment unit for attaching arced member to ring; π is angle of 180 deg. EFFECT: simplified construction, wider range of possible spatial transformations and increased entertaining effect. 19 dwg