Teaching Aid (Patent No: 674697)

Inventor: Schramm, Chris

Location: Edmonton

Comments: N/A

Description:
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A teaching aid comprising a housing having windows therein with mathematical symbols between such windows, a plurality of wheels mounted rotatably in the housing, such wheels each having mathematical integers thereon visible through one of the windows, a plurality of groups of actuating openings in the housing, a plurality of actuating pegs, each insertable in anyone of the openings, actuating mechanisms positioned in the housing below each of the actuating openings and coupled operatively to the wheels whereby pegs inserted in the openings will contact the actuating mechanisms and rotate the wheels.

2. The teaching aid as claimed in Claim 1 where in the number of pegs in each of the groups of openings is indicated in a window and the sum of the number of pegs in the openings and the integers revealed by the windows will be indicated in another window.

3. The teaching aid as claimed in Claims 1 and 2 wherein the actuating mechanism comprises actuating cables wound on the wheels at one end and spring loaded at their opposite ends, slides movable longitudinally by insertion of a peg in an opening and adapted to tighten the actuating cables and rotate the wheels.

Bishop, McKenzie & Co. Barristers & Solicitors
303 Alexandra Building Edmonton, Alberta
Patent Agents of the Applicant