Educational toy

Details Educational toy Educational toy

1977-06-02

1978-10-10

Grieb, William H.

G09B 300

Patent

active

041188772

ABSTRACT:
An educational toy comprises in combination a base, a pair of boards and a series of replaceable quiz-and-answer plates. The base has a central spindle. The boards and one of said plates are superimposed over said base. Each board is provided with one groove which is curved in opposite directions between the two boards in such a way that a crossover is formed. A magnet is buried in said crossover. There are various well-designed representations on each plate. An indicator is displaceable over said plate to indicate whether the selected answer is correct or wrong.

REFERENCES:
patent: 126761 (1872-05-01), Unna
patent: 317365 (1885-05-01), Jacobs
patent: 2295452 (1942-09-01), Deaton
patent: 2956807 (1960-10-01), Luchsinger
patent: 3114547 (1963-12-01), Joslyn
patent: 3380176 (1968-04-01), Kling et al.
patent: 3758693 (1973-09-01), Ebert
patent: 3994078 (1976-11-01), Liu

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