| 摘要 |
<p>A device for reading printed characters formed of elements separated by spaces of first and second kinds in accordance with a character code. The device includes a read head arranged for relative motion with respect to the elements of a character, and is characterized by being insensitive to the speed at which the character elements move past the read head. The read head includes three element detectors physically spaced such that the first and second detectors are separated by a first kind of space, and the first and third detectors are separated by a distance equal to the second kind of space. Suitable circuitry is connected to the detectors for identifying the two kinds of space. The first kind of space is identified when the first and second detectors simultaneously detect character elements, and the second kind of space is identified when the first and third detectors simultaneously detect character elements.</p> |
