Teaching aid for teaching numbers

Details Teaching aid for teaching numbers Teaching aid for teaching numbers

1974-11-15

1976-05-25

Grieb, William H.

40130D, G09B 1902, G09F 1304

Patent

active

039583449

ABSTRACT:
An educational device has a board divided into a plurality of individual spaces on each of which respective preferably raised numbers are located. Two switches are mounted in the board adjacent each number, and closure of one of the respective switches activates an electric circuit to illuminate that number, while closure of the other of the respective switches activates a second electric circuit to produce an audible indication. The numbers may be in one or more colors, and space is provided adjacent each number on which a student may write that number. Moreover, a respective set of one or more sockets is formed in the board adjacent each number to receive one or more pegs, and the number of sockets in each set corresponds to the actual number to which it is adjacent.

REFERENCES:
patent: 1228391 (1917-06-01), Barr et al.
patent: 1536449 (1925-05-01), Muller
patent: 2050805 (1936-08-01), Pumar
patent: 2304893 (1942-12-01), Dickson
patent: 2498578 (1950-02-01), Reinnagel
patent: 2512837 (1950-06-01), Pescatori
patent: 3077677 (1963-02-01), Malkin et al.
patent: 3353284 (1967-11-01), Hursh et al.
patent: 3357116 (1967-12-01), Bazacos
patent: 3381394 (1968-05-01), Munro
patent: 3404475 (1968-10-01), Coad
patent: 3811205 (1974-05-01), Pitzler

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