| 摘要 |
<p>For enabling a computer to calculate locations of cuts across an elongated workpiece that will divide it into standardized length finished pieces of optimum economic value, the workpiece is established between parallel, spaced boundaries of an inspection zone, lengthwise parallel to them. From a movable light source a beam is projected down onto the inspection zone that defines a line of illumination extending from one to the other of the boundaries. A manually operable control member, movable parallel to the boundaries, actuates the light source to move the line of illumination lengthwise along a workpiece. An output is produced that has a unique magnitude for each incrementally different position of the line of illumination. When the line of illumination is located at a boundary between unlikequality lengthwise extending portions of the workpiece, actuation of a pushbutton delivers the then-existing output magnitude to the computer as an input.</p> |
