Electronic teaching aid

Details Electronic teaching aid Electronic teaching aid

1978-05-10

1980-06-03

Grieb, William H.

G09B 706

Patent

active

042054630

ABSTRACT:
An electronic teaching aid including a circuit board having a plurality of numbered rows for possible questions and a plurality of circles to indicate a plurality of possible answers for the question in each row. A probe is inserted in the circle selected as the answer, and in doing so perforates a covering sheet. If the answer is correct or incorrect the probe completes an electrical circuit, thereby producing an output to light a light, ring a bell, activate a counter, or whatever desired.

REFERENCES:
patent: 2586710 (1952-02-01), Pick
patent: 2943400 (1960-07-01), Griswold
patent: 3057082 (1962-10-01), Wellington et al.
patent: 3106027 (1963-10-01), Thelen
patent: 3141244 (1964-07-01), Smith
patent: 3177595 (1965-04-01), Yonker et al.
patent: 3579864 (1971-05-01), Littwin et al.
patent: 3662078 (1972-05-01), Holiday
patent: 3696524 (1972-10-01), Kranyik et al.

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