Applied Motion Study
A Collection Method to industrial Preparedness

CHRONOCYCLEGRAPH DEVICES 83 isfactory in enabling the workers to visualise the path of the motion easily. The average engineer, who becomes, through his training and the neces- sities of his work, a good visualiser, even though he is not one by nature, often fails to realise the small capacity for visualisation possessed by the average person. A long experience in teaching in the industries made this fact impressive and led to the invention of the cyclegraph, and, later, the chronocyclegraph method of recording, in order to aid the non-visualising worker to grasp motion economy easily. The device for recording the path of the motion consisted of a small electric light attached to the forefinger or other moving part of the body of the worker. The worker per- formed the operation to be studied, and the path, traversed by his hand was marked by a line of light. An ordinary photographic plate or film was exposed during the time that he performed the work, and recorded the motion path described by the light as a white line, something like a white wire. A stereoscopic camera enabled one to see this line in three dimensions. This line was called a “ cyclegraph,” since it had been de- termined a cycle was the most satisfactory unit