Applied Motion Study
A Collection Method to industrial Preparedness

CHRONOCYCLEGRAPH DEVICES 89 that might affect the methods used, here also the need for viewing the motion at other angles re- mained. An intensive study of this need and pos- sible means for overcoming it resulted in the in- vention of the motion model. This consists of a wire model that exactly represents the path, speeds and directions of the motion studied. As many cyclegraph records of the operation taken from different angles as are needed are made, the cross-sectioned screen being introduced at those places where the direction of the motion makes a decided change. These cyclegraphs, which are in every case stereochronocyclegraphs, are studied through a stereoscope. Motion models are made by looking at the path as shown through the stereoscope, and bending the wire to conform to this path. The wire model, when completed, is placed in a black box cross-sectioned in white, the cross-sectioning being placed at the same relative places as are the cross-sectioned screens in the original picture. If the photograph taken from the same angle that the original photograph was taken is exactly similar to the original photo- graph, the model is considered a success. Each and every subdivision of a chronocyclegraph has