G - Physics – 09 – B
Patent
G - Physics
09
B
354/215, 35/37
G09B 5/02 (2006.01) G06F 15/02 (2006.01) G09B 19/02 (2006.01)
Patent
CA 1063345
ABSTRACT OF THE DISCLOSURE A mini electronic calculator adapted to assist children in acquiring the rudiments of arithmetic. The keyboard of the calculator is provided with three parallel sets of keys, the upper sat being a row of digit keys for entering a first complete number, and the middle see being a corresponding row of digit keys for entering a second complete number. The lower set includes plus and minus sign function keys and an equal sign key. The calcula- tor display is in a blackboard format ant has three parallel groups of LED display stations, the upper group of which is formed by a row of digit stations for presenting the first complete number entered by actuating the keys in the upper keyboard set. The second group is formed by a lead station for present- ing a plus or minus sign, depending on which function key is actuated, followed by a row of digit stations for presenting the second complete number entered by actuating the keys in the middle set. The third group is separated on the blackboard display from the second group by a permanent summation line and is formed by a load station for presenting the equal sign, followed by a row of digit stations for presenting the result of the computation.
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