Application of Electronic Control

This paper describes typical applications of electronic control. Motor control including an adjustable-speed drive for direct-current motors and a speed-regulator system are shown. The importance of resistance welding in production of sheet-metal assemblies and the use of ignitron equipment for control of time and current are discussed. Many uses for control using light, including loop, tin-flow, and paper-cutting regulation are described, as well as pinhole detection in steel strip, and general-purpose photoelectric relays. The importance of close co-ordination of design of the electrical and mechanical elements of a complete system is emphasized.