Manual mathematical calculator

Details Manual mathematical calculator Manual mathematical calculator

G - Physics

06

G

235/30

G06G 3/00 (2006.01) G06G 1/04 (2006.01) G06G 5/00 (2006.01)

Patent

CA 1206455

- 9 - TITLE MANUAL MATHEMATICAL CALCULATOR INVENTOR Werner REXER ABSTRACT A modified abacus which aids children in counting, ad- ding, substracting, multiplying and dividing including squares and square roots of numerals, discloses the utilization of a square matrix of slidable tokens, each token slidable on a track or rod, and preferably with 10 tokens on each track and 10 parallel tracks arranged whereby the square matrix is esta- blished. On one side each of the tokens has indicia or nume- rals, N, where N is defined by the equation: N(a,b) = (10a-10) + b, and also indicia on the other side; N(a,b) = a x b where; a and b are the coordinate positions on the tokens in each matrix. Each token has a lateral width and the cumulative width of all tokens on a common track is less than the length of the track thereby allowing the tokens to move to and fro on command.

450275

Affiliated with

Also associated with

Rating

Manual mathematical calculator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manual mathematical calculator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manual mathematical calculator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1302627