Mathematical puzzle
United States Patent 2202078

My invention relates to puzzles, and more particularly to those involving mathematical values or problems, and my main object is to provide a puzzle of this kind which combines mental development with amusement. A further object of the invention is to provide a mathematical puzzle which utilizes...

Bartelt, Joseph R.
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Bartelt, Joseph R.
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International Classes:
A63F3/04; A63F3/02
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My invention relates to puzzles, and more particularly to those involving mathematical values or problems, and my main object is to provide a puzzle of this kind which combines mental development with amusement.

A further object of the invention is to provide a mathematical puzzle which utilizes the fundamental principles of mathematics, such as addition, subtraction, etc.

Another object of the invention is to materialize the puzzle in the form of a chart similar to a checker or cross-word puzzle.

An additional object of the invention is to make the puzzle available in various forms and suitable for game use.

With the above objects in view, and any others which may suggest themselves from the description to follow, a better understanding of the invention may be had by reference to the accompanying drawing, in whichFig. 1 is a plan view of a typical puzzle card showing the puzzle assembled and solved; Fig. 2 is a similar view, showing the puzzle separated and un-solved; Fig. 3 is a perspective view of a counter or tablet usable in one form of the puzzle.

In considering the form of the puzzle illustrated, it may be said that such form utilizes an ordinary card 10 as a base with a separate member 20 applicable thereto. The card is lined as indicated at II with a formation of squares designed to serve five purposes. Thus, the square 12 in the upper corner may carry an origin number from which the figuring for the puzzle commences. The squares 13 appear in alternation and bear the signs of addition, subtraction, etc.

The squares 14 alternate with the squares 13 and are blanks. The squares 15 also alternate with certain of the other squares, but having no function are made solid and raised from the surface 40 of the card. Finally, the alternate squares 18 of the member 20 bear result figures, to which the figuring must lead to solve the puzzle.

Counters or tablets 17 of the type shown in Fig. 3 are preferably employed to solve the puzzle. 45 It is the intention that these counters, carrying various single numbers be placed in the squares 14 in a manner to join with the arithmetical signs in any given vertical or horizontal row to obtain the result in the corresponding square 18. 50 Thus, Fig. 2 shows the proper counters placed to solve the particular puzzle, and it will be evident that a game could be played with two or more of the cards in the manner of lotto, the player who first picks out and places the proper num55 bers being the winner.

It is also possible to make the puzzle without the necessity of using counters or tablets to obtain the solution. The numbers for the squares 14 could be written therein instead. However, the puzzle is intended to be used with different solution numbers in the units 20 from time to time or for different players in case a game is to be played, so the cards are preferably made in, the blank form. Thus, the units 20 could be made with various different numbers, so as to change the solution of the puzzle in as many ways as may be desired. Also, this structure enables the squares 10 to be kept in stock or manufactured in quantities without any changes due to different result markings.

It will be evident from the above description that I have provided a puzzle which is both fascinating and instructive, since it stimulates the mind to be more alert with figures and retain familiarity with the processes of arithmetic, at the same time the puzzle is of a relatively simple nature and presents an appearance familiar in some respects to the average person. Besides, the puzzle is not of a difficult or baffling character, since a sufficient number of result figures are present to facilitate the completion of the respective rows without undue mental strain. Further the puzzle is of an independent nature, requiring no reference to be consulted, as is the case with cross-word puzzles, where a dictionary must often be consulted. In the present instance, any person having an elementary education would be capable of negotiating the solution of the puzzle. While I have illustrated what is thought to be the preferred form of the novel puzzle, it is possible that other variations may be made therein without departing from its principle. Thus, the spaces for number entries could be in the form of openings with small rollers behind them bearing a succession of numbers on their peripheries, the rollers to be turned to expose the desired number through the opening. I desire to consider this and all other variations of the puzzle as coming within the scope and spirit of the ap- 40 pended claims.

I claim: 1. A mathematical puzzle, comprising a board having imposed thereon a plurality of intersecting rows,, each row being defined by spaced and 45 substantially parallel lines, each row being divided into alternate blank spaces and arithmetical signs, said signs indicating computing operations for a separate problem, for each row, said blank spaces being adapted to be filled by numbers com- 50 pleting the terms of said problems, and a separate member applicable to said board and adapted to position a result number for each problem at one end of each row.

2. The structure of claim 1, said board being 55 substantially rectangular in shape and said separate member being L-shaped.