Locking puzzle

Claim 2

A puzzle comprising an arrangement of elongate blocks each being square and equal in cross section and having the same length, said blocks being provided with suitably located rabbets so as to permit interlocking thereof into an assembled puzzle, two of said blocks being adapted to receive a pair of locking members such that in a first orientation of said assembled puzzle said two blocks and said locking members retain said puzzle in an assembled, locked position and in a second rotated orientation said locking members allows said two blocks to unlock thereby permitting disassembly of said puzzle.

Claim 3

A locking puzzle comprising an arrangement of fourteen elongate, parallelepiped blocks, each block being of the same length and having the same square cross section, twelve of said blocks each having at least two parallel sided recesses therein said recesses extending laterally and having a length equal to the width and a depth equal to one half the width, said twelve blocks adapted to be arranged in an interlocking assembled mode, said remaining two blocks having means cooperating with a pair of locking blocks such that in a first orientation of said assembled puzzle said two blocks and said locking blocks maintain said puzzle locked in an assembled mode and in a second rotated orientation said locking blocks allow said two blocks to unlock thereby permitting disassembly of said puzzle.

Claim 4

A locking puzzle comprising an arrangement of fourteen elongate, parallelepiped blocks, each block being of the same length and having the same square cross section, twelve of said blocks each having at least two parallel sided recesses therein said recesses extending laterally and having a length equal to the width and a depth equal to one half the width, said twelve blocks adapted to be arranged in an interlocking assembled mode, said remaining two blocks having means cooperating with a pair of locking blocks such that in a first orientation of said assembled puzzle said two blocks and said locking blocks maintain said puzzle locked in an assembled mode and in a second rotated orientation said locking blocks allow said two blocks to unlock thereby permitting disassembly of said puzzle.

Claim 5

A locking puzzle comprising fourteen elongate, parallelepiped blocks, each block being the same length and having equal square cross section, twelve of said blocks having at least two rabbets on one or more sides, said blocks adapted to be assembled in an interlocking manner, said remaining two blocks being adapted to receive a pair of locking blocks therebetween so that said two blocks complete said puzzle whereby in a first orientation of said puzzle said two blocks and said locking blocks retain said puzzle in a locked assembled mode and in a second rotated orientation said locking blocks unlock said two blocks thereby permitting disassembly of said puzzle.

Claim 6

A locking puzzle comprising fourteen elongate, parallelepiped blocks, each block being the same length and having equal square cross section, twelve of said blocks having at least two rabbets on one or more sides, said blocks adapted to be assembled in an interlocking manner, said remaining two blocks being adapted to receive a pair of locking blocks therebetween so that said two blocks complete said puzzle whereby in a first orientation of said puzzle said two blocks and said locking blocks retain said puzzle in a locked assembled mode and in a second rotated orientation said locking blocks unlock said two blocks thereby permitting disassembly of said puzzle.

Claim 7

A locking puzzle according to claim 1, wherein a first of said two blocks has a pair of rabbets on one face adapted to interlock in said puzzle and the opposite face having centrally disposed a single rabbet with a first deep section and a second shallow section and the second of said two blocks having a centrally disposed rabbet on one face with a first deep section and a second shallow section, said shallow section in said first block being longer than said shallow section in said second block, said locking blocks being configured to fit into each of said first deep sections so that when said two blocks are assembled with said rabbets facing each other in one orientation said two blocks are prevented from sliding longitudinally while in a rotated orientation said two blocks are free to slide longitudinally.

Claim 8

A locking puzzle according to claim 4 wherein the thickness of said locking block is substantially equal to the depth of said deep sections in said first and second blocks.