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Directions for operating leed & northrup test set No 5430-AM -1
Leeds & Northrup, was founded in 1899, in Philadelphia, Pennsylvania, by Morris E. Leeds. Originally known as Morris E. Leeds & Company and produced electrical measuring instruments for laboratory and testing use. The new firm made galvanometers, potentiometers, bridges, and other laboratory-type equipment of high quality. In 1903, Mr. Leeds took Dr. Edwin F. Northrup into partnership and the business was incorporated under the name of Leeds & Northrup.
Leeds & Northrup was acquired in 1978 by General Signal Corporation of Stanford, Connecticut. In 1980, the name of the division was changed from Expendable Devices to Leeds & Northrup Metallurgical Products. In 1995, General Signal sold the Metallurgical Products division to Heraeus Holding, GmbH of Hanau, Germany.