Electrical Controls-Namely, Apparatus for Controlling the Industrial Operations of Installations, Machines, and Motors by Means of an Electric Current, and Soldering Irons

Electric Heating Apparatus in the Nature of Tubular Heaters, Circulation Heaters for Liquid and Gas Heating, Immersion Heaters for Use in Heating Liquids, Duct Heaters, Ion Nitriding Furnaces and Industrial Furnaces