The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1977
Filed:
Sep. 07, 1976
Ted William Toal, Sunnyvale, CA (US);
Ralph Warren Haines, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
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.