| 摘要 |
<p>PURPOSE:To make assembling or repairing easy and simplify operation by providing a transparent sheetlike switch through which various characters, patterns, symbols etc. can be seen, a judging device that converts input signals into output signals and a display circuit. CONSTITUTION:An information sheet 5 on which information is displayed is placed at prescribed position under the transparent switch 6. Then, the position of problem number is depressed from bove the switch 6. An electric circuit is connected to the designated problem and the solution is prepared. The solution of the problem is selected from choices, and prescribed position is depressed fro above the switch 6. By this way, prescribed display, for instance chimes of correct solution, is given in the display circuit 3 according to correctness or error of selected answer. Thus, assembling or repairing is made easy and operation becomes simple.</p> |
