Multiplication study device

Details Multiplication study device Multiplication study device

1979-11-28

1981-03-31

Oechsle, Anton O.

Education and demonstration

Mathematics

Arithmetic

434209, 434348, G09B 300

Patent

active

042584779

ABSTRACT:
A multiplication study device for teaching a student multiplication skills by operation of push-buttons mounted in a box-shaped case. The push-buttons are each provided with a semi-transparent see-through surface which permits the appearance therethrough of an answer to a multiplication problem when the push-button is depressed so as to come into contact with a projecting member disposed therebelow. A plurality of the push-buttons are mounted in the case, and the case includes a rear cover for mounting the projecting members. A common resilient member in the form of a urethane plate is employed for normally urging the push-buttons in an upward direction.

REFERENCES:
patent: 1673659 (1928-06-01), Anderson
patent: 3572719 (1971-03-01), Span
Advertisement "Merry Multiplier," Parade Magazine Suppl., May 18, 1969, p. 12.

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