Children's educational apparatus

Details Children's educational apparatus Children's educational apparatus

1987-07-06

1988-02-16

Grieb, William H.

Education and demonstration

Question or problem eliciting response

Correctness of response indicated to examine by...

434202, G09B 302

Patent

active

047252375

ABSTRACT:
A children's educational apparatus comprising a driving member and a control member. The driving member includes a driving roll and two driven rolls, all which rotate together. A set of cards is set on each of the driven rolls, cards in one set being printed with mathematical questions and cards in the other set being printed with the solutions corresponding to those questions. The control member includes pressing keys on a keyboard, each of which is marked with a number on the upper face thereof and connects to a keying arm. When pressing the keys on which correct members corresponding to solutions of the mathematical questions are marked, the keying arms will be forced to move, thus forcing a pushing element to push the driving roll to rotate, then changing the cards to the next one.

REFERENCES:
patent: 1670480 (1928-05-01), Pressey
patent: 1749226 (1930-03-01), Pressey
patent: 2317107 (1943-04-01), Oesch
patent: 2983054 (1961-05-01), Twyford, Jr.
patent: 4033051 (1977-07-01), Liu

Affiliated with

Also associated with

Rating

Children's educational apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Children's educational apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Children's educational apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2218633