Registers – Coded record sensors – Particular sensor structure
Patent
1976-09-07
1977-10-04
Pinkham, Richard C.
Registers
Coded record sensors
Particular sensor structure
35 9B, 35 31R, 35 48R, 235152, G09B 1902, G06F 1516
Patent
active
040516059
ABSTRACT:
An educational calculator is provided with means for generating parameters describing a problem to be solved. The user metally solves a problem and inserts the answer to the problem into the calculator. If the user has answered correctly, the calculator lights a green light and displays the problem with the correct answer. If the user answers incorrectly, the calculator displays an error signal. The user is given a second try to answer the problem and, if he fails again, the correct answer is flashed and a new problem is displayed. The calculator keeps track of the number of problems the user has answered correctly. Means are provided within the calculator to permit the calculator to operate in competition with another identical educational calculator. When a cable is connected between two calculators, the calculators are energized to be in the competition mode and only one of the calculators is energized to be a "master" calculator. The other calculator is designated as the "slave." The type of problem to be solved is generated in the master calculator and is transmitted to the slave. The problem is then dislayed on both calculators and two users compete against each other and against time in solving a number of problems presented by the master calculator. A score is kept by each calculator and is displayed. At the end of a predetermined number of problems, the competition is over and the final score is displayed.
REFERENCES:
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patent: 3673392 (1972-06-01), Holm
patent: 3787988 (1974-01-01), Nakajima et al.
patent: 3934229 (1976-01-01), Cochran et al.
patent: 3944983 (1976-03-01), Gale
patent: 3971925 (1976-07-01), Wenninger
patent: 3974575 (1976-08-01), Duncan
Haines Ralph Warren
Toal Ted William
Higgins Willis E.
Hum Vance Y.
National Semiconductor Corporation
Pinkham Richard C.
Woodward Gail W.
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