YELLOW RAYS.

Waikato Times, Volume 111, Issue 18653, 3 June 1932, Page 2

YELLOW RAYS.

PERFORM INTRICATE TABK. A device to make the yellow light from glowing metal perform an intricate piece of work is in use at the works of Messrs Stewarts and Lloyds, Ltd., at Halesowen, near. Birmingham, says a London paper. It consists of a photo-electric cell in front of which is a filter of gases. Yellow light passing through the filler actuates the photo-electric cell which In its turn causes various mechanical devices to act. At Messrs Stewarts and Lloyds several tube mills have been jilted with this control. In the mills while hot sheets of metal pass through mechanism which shapes thorn inlo tubes. They then go under a shuttle)’ weighing lour tons for a finishing process. A man used lo operate Ihc shutter by a lever. Now the light from the tube falls upon the cell, which causes the shutter lo work and at the same time counts each ‘tube as it passes. Mr J. LL Kramer, an engineer, who devised lliis application of light rays for Lie General Electric Company, of Birmingham, said lo a reporter: “-Next monlh 1 am going to try an experiment with .an infra-red ray which is distinct from I his yellow ray at a lunatic asylum. The authorities want some means of giving the inmates a certain amount of liberty yet keeping them under control. “Wo are going lo fit up an equipment in I lie ground so .that whenever anyone passes a certain point the ray will ring an alarm bell."