Modular computer teaching device

Details Modular computer teaching device Modular computer teaching device

1975-09-30

1976-11-30

Grieb, William H.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

46 25, 46 43, 273111, 273118D, G09B 1902

Patent

active

039940764

ABSTRACT:
A cube is provided with four side walls, and an open bottom and top. Mounted within the cube is a flip-flop unit made up of three wings, one wing being longer than the other two so that when a marble is dropped in the cube, the flip-flop unit will rotate until the longer wing is in contact with one of the side walls. A plurality of each such cubes are provided in order to teach adding and subtracting in the binary system and to perform many other functions.

REFERENCES:
patent: 555288 (1896-02-01), Keiser
patent: 2132757 (1938-10-01), Paulson
patent: 3006082 (1961-10-01), Libbey
patent: 3331143 (1967-07-01), Weisbecker
patent: 3390471 (1968-07-01), Godfrey
patent: 3403459 (1968-10-01), Divilbiss

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