Train length measuring device

摘要: An apparatus and method for measuring the overall length of a series connected moving articles each which may be indeterminate length. The example to described comprises interconnected railroad cars forming train. total train is determined by employing two separated photocells light sources, source normally shining on respective photocell, so that car sequentially breaks lightbeams causing produce electrical outputs. Since distance between known time takes travel from one other easily occurrences output signals photocells, beginning next computed, computations being accumulated indicate