| 摘要 |
An improved input device for use in an electronic calculating machine or any other keyboard signal sender having a plurality of character keys on the keyboard, which permits such machine or instrument to function its own operation without fault or error even when a plurality of keys are operated about at the same time successively in rapid sequence, that is, rolled over. It has been well known that, when contact circuits associated with relevant character keys that has been operated at the same time are completed about at the same time for a certain period of time, the machine or instrument will produce an erroneous result or otherwise malfunction. According to the present invention, to avoid this disadvantage, this input device is interposed between the keyboard and the binary encoding device heretofore generally used.
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