Original industrial electrical trade vintage catalog for ARNOLD ENGINEERING COMPANY.  Subsidiary of Allegheny Ludlum Corp. Main office and plant was located at 147 East Ontario Street, Chicago, IL. 

Manufacturers of Permanent Magnets for Industry. Product applications include Radio, Sound and Communications Equipment, loudspeakers, headsets, microphones, hearing aids, telephone ringers, voltage regulators, phonograph pick-ups, generators and meters. Automotive and Aviation Equipment magnetos, tachometers, compasses, voltage regulators, motors, speedometers and generators. Instruments include ammeters, voltmeters, galvanometers, seismographs, flux meters, watt-hour meters, light meters and cardiograph recorders. Has numerous product images with detailed descriptions, uses, applications, specifications, properties and dimensions charts provided. Unbound from a large 1946 postwar industrial product designer catalog, this unique old twenty-four page technical brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your vintage industrial electrical equipment library. (8-46).