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Publication numberUS907203 A
Publication typeGrant
Publication dateDec 22, 1908
Filing dateSep 20, 1907
Priority dateSep 20, 1907
Publication numberUS 907203 A, US 907203A, US-A-907203, US907203 A, US907203A
InventorsWillis Walker
Original AssigneeWillis Walker
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 907203 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




" 907,203. Patented Dec; 22,1908.




N 0. 907,208. Specification of Letters Patent. PatentedDec. 22, 1908.

Application filed September 20, 1907. Serial N 0. 393,854.

In assembling the several parts difiiculty will at first be experienced in determinin the contour of the middle or basic portion 0 the figure to be produced. This difliculty is increased because only two forms of blocks are employed, to wit, triangular blocks 9 and trapezoidal blocks 8. In order to assemble the several blocks one member 8 and one member 9 are assembled so as to form a rectangle, after which one of the trapezoidal sections 8 is placed against each side of the rectangle and with its diagonal face 10 outermost. Triangular spaces will thus be formed at the corners of the middle rectangular figure and these spaces will be of the same proportions as the triangular blocks 9 which can thus be seated therein and the hypotenuse of each of the blocks 9 will thus aline with the diagonal face 10 of one of the adjoining blocks 8. When the blocks are not in use the two sets can be assembled in pairs so as to form rectangles of uniform proportions and which can be superposed as indigated in Fig. 1 and placed within a suitable What is claimed is:

A puzzle comprising a cube consisting of five layers of blocks each layer comprising a trapezoidal block and a right angle triangular block, the smaller base of the triangular block being of the same length as the smallest side of the trapezoidal block, said blocks being designed when assembled in a predetermined manner to constitute a square hav ing an area five times greater than the area of one face of the cube, the thickness of each blcijck being one-fifth of the thickness of the on e.

To all whom it may concern: I

Be it known that I, WILLIs WALKER, a citizen of the United States, residing at Sedalia, in the county of Douglas and State of Colorado, have invented a new and useful Puzzle, of which the following is a specification.

This invention relates to puzzles and more particularly to geometrical devices of this character made up of a plurality of angular blocks of different contours designed, if assembled in a particular manner, to constitute a cube capable of fitting snugly within a suitable retaining case when not in use. The blocks, however, are so shaped that when they are separated they can, by the proper placing thereof, be assembled to form a single rectangular figure of the thickness of I one block. This arrangement of the blocks, I however, will be found extremely diflicult by persons inexperienced in the use thereof.

VVit-h these and other objects in view the invention consists of certain novel features of construction and combinations of parts which will be hereinafter more fully described and pointed out in the claim.

In the accompanying drawings is shown the preferred form of the invention.

In said drawings: Figure 1 is a perspective view showing the blocks assembled to form a cube. Fig. 2 is a perspective view of one set of blocks spaced apart. Fig. 3 is a plan view showin the blocks assembled to form a rectangular figure.

By referring to the drawings it will be noted that the puzzle consists of preferably five sets of blocks each setconsisting of a right-angle-triangular member 9 and a trapezoidal member 8 so assembled that when the hypotenuse 7 of the member 9 is placed against the diagonal face 10 of the member 8 a perfect rectangular figure will be formed. The smaller base of each member 9 is of the same size as the smallest side of the trapezoidal block.

f my own, I have hereto afiixed my signature in the presence of two witnesses.



In testimony that I claim the foregoing as

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2738594 *Dec 12, 1951Mar 20, 1956Swingle Donald MToy blocks
US2885207 *Dec 11, 1951May 5, 1959Arthur WormserGeometrical puzzle game
US3637217 *Feb 13, 1970Jan 25, 1972Kent ShermanPuzzle with pieces in the form of subdivided rhombuses
US3647218 *Feb 24, 1970Mar 7, 1972Foley Charles FPan puzzles
US4522404 *Jun 14, 1984Jun 11, 1985Vincenzo Di GregorioSubdivided block components reassemblable into three dimensional figures
US4573683 *Nov 30, 1984Mar 4, 1986Lamle Stewart MEducational puzzle cube
US4753622 *Oct 5, 1987Jun 28, 1988Yoshitsugu NakamaBuilding block kit
US9162139 *Jan 20, 2011Oct 20, 2015Mordechai LandoCube puzzle
US20050206079 *May 19, 2003Sep 22, 2005Marijn Van HerelGame for promoting the spatial perceptibility
US20060076732 *Oct 13, 2004Apr 13, 2006Jean-Hwa ChiouMulti-functional geometric puzzle system
US20090020947 *Jul 17, 2007Jan 22, 2009Albers John HEight piece dissection puzzle
US20120306153 *Jan 20, 2011Dec 6, 2012Mordechai LandoCube puzzle
Cooperative ClassificationA63F9/10