Educational block with replaceable chip

Details Educational block with replaceable chip Educational block with replaceable chip

1975-07-11

1977-01-18

Skogquist, Harland S.

46 26, A63H 3308

Patent

active

040031446

ABSTRACT:
An educational alphabet block formed of a polymeric material and having the configuration of a cube with a square recess on each face for receiving a removable chip. Each face of the block also defines an aperture. The aperture reduces the weight of the block without reducing its strength and also provides a means for inserting rods into the block.
The chip is fabricated of a polymeric material and includes opposed flexible lips about a groove around the perimeter of the chip. The flexible lips facilitate the ease with which chips are inserted and removed from a recess in the face of the block. The groove enables the lip of one chip to be used to remove another chip secured in a recess in the block.
The chip may have appropriate legends such as letters of the alphabet, numerals or scenes printed on one or both faces. Alternatively, the chips may define a central aperture for the insertion of rods into the blocks.
The chips themselves have a thickness substantially twice the depth of the recess on the face of the block in order that a single chip may be used to fasten opposed faces of two blocks together.
The square configuration of the chips prevents the movement of mated faces when secured together.

REFERENCES:
patent: 319764 (1885-06-01), Westcott
patent: 956632 (1910-03-01), Finch
patent: 1314541 (1919-09-01), Seeger
patent: 1682686 (1928-08-01), Rutherford
patent: 1895611 (1933-01-01), Doak
patent: 2202956 (1940-06-01), Lee
patent: 2855206 (1958-10-01), Haviland
patent: 2885822 (1959-05-01), Onanian
patent: 3148477 (1961-09-01), Bjorn
patent: 3205611 (1965-09-01), Onanian
patent: 3488881 (1970-01-01), Holzer
patent: 3491196 (1970-01-01), Stein

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