Electronic device for use as a teaching aid

Details Electronic device for use as a teaching aid Electronic device for use as a teaching aid

1976-09-24

1978-04-11

Pinkham, Richard C.

35 9C, 35 31C, 35 48A, G09B 500, G09B 706

Patent

active

040831205

ABSTRACT:
A teaching device having a base on which a program card is mounted. The base contains an electrical circuit having a plurality of count indicator lights and a further illuminated indicator. A rotary switch is mounted on the base and has a numeral display disc mounted thereon for displaying one of a series of numbers through a read-out opening in the base which is illuminated by the further illuminated indicator. The rotary switch also controls illumination of the count indicator lights based on the electrical circuit of the program card mounted on the base.

REFERENCES:
patent: 3100352 (1963-08-01), Boissevain
patent: 3491464 (1970-01-01), Gray
patent: 3526971 (1970-09-01), Shipley
patent: 3562922 (1971-02-01), Friedman et al.
patent: 3605286 (1971-09-01), Plumly
patent: 3672071 (1972-06-01), Prola
patent: 3707783 (1973-01-01), Hajduk
patent: 3751825 (1973-08-01), Barrett
patent: 3869810 (1975-03-01), Ronalds
patent: 3902257 (1975-09-01), Hesener

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