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The Universal Book of Mathematics provides the following information about Altekruse puzzle: [2] [3] A symmetrical 12-piece burr puzzle for which a patent was granted to William Altekruse in 1890. The Altekruse family is of Austrian-German origin and, curiously, the name means "old cross" in German, which has led some authors to incorrectly ...
Burr puzzles. A burr puzzle is an interlocking puzzle consisting of notched sticks, combined to make one three-dimensional, usually symmetrical unit. These puzzles are traditionally made of wood, but versions made of plastic or metal can also be found. Quality burr puzzles are usually precision-made for easy sliding and accurate fitting of the ...
Pentangle's first product was a burr puzzle, the Woodchuck puzzle, whose object was to assemble 24 wooden pieces into an octahedral shape. It sold hundreds of thousands of these. [ 1 ] Pentangle eventually made a total of 314 different burr puzzles, and from 1979 made and sold the "Chinese Cross", a compendium of 42 pieces including all the ...
The Chinese wood knot, a notorious interlocking puzzle. In this particular version designed by Bill Cutler, five moves are needed before the first piece can be removed. In an interlocking puzzle, one or more pieces hold the rest together, or the pieces are mutually self-sustaining. The aim is to completely disassemble and then reassemble the ...
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A complex Baguenaudier puzzle. The goal is to free the string. The "mini rope bridge puzzle". The goal is to remove the two rings. (solution shown). Wire-and-string puzzles usually consist of: one piece of string, ribbon or similar, which may form a closed loop or which may have other pieces like balls fixed to its end. one or several pieces of ...
An example dated around that time is a French version of the puzzle called "L'ÉTÉ" produced by N.K. Atlas of Paris. [5] [17] Another example is the wooden version of the puzzle produced by Drueke & Sons, under the name "Pa's T puzzle", dated around the 1940s and here depicted to the right. [18]
A number of different types of wood are used in the creation of yosegi.Both the spindle tree (Euonymus spp.) and Ilex macropoda are used for the colour white; aged wood from the Katsura tree (Cercidiphyllum japonicum) is used for black; Picrasma quassioides, mulberry and the Chinese lacquer tree (Toxicodendron vernicifluum) are used for yellow; the camphor tree (Cinnamomum camphora) and ...