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History of the manufacturer  

Leeds & Northrup; Philadelphia

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Name: Leeds & Northrup; Philadelphia    (USA)  
Abbreviation: leedsnorth
Products: Model types Others

Leeds & Northrup Company; Philadelphia, Pennsylvania.

Hersteller von Galvanometern, Potentiometern, Brücken und anderen Präzisionsgeräten für Laboratorien.

Founded: 1899
Production: 1899 -
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.
More Infos can be found at

This manufacturer was suggested by Alexander Kusdas.

Some models:
Country Year Name 1st Tube Notes
USA  60 Wheatstone Bridge 5430-AM-1   Wheatstonesche Messbrücke, speziell für die Messung und Fehlerortung an Fernmeldeleitungen... 
USA  30 Multiple Range Potentiometer Indicator   Leeds & Northrup Multiple Range Potentiometer Indicator. 
USA  16 Ayrton Universal Shunt 2164   Western Electric - 1916 Electrical Supply Year Book: 'Model 2164 - Ayrton Universal S... 
USA  55 Voltage Divider 100000 ohms Cat. No. 4395    
USA  15 Battery Charger   Device for charging storage batteries.  Unit contained in a 5 gallon salt glazed c... 
USA  26 4258     The Kohlrausch Slide Wire, no. 4258, cost $100.00 in 1926. It has "end coils tha... 
USA  70 Amplifier 101133 12BH7  Most probably just for switching purpose. No AF. 
USA  30 Galvanometer 2370    
USA  50 5430 A , Test set I-49   Portable Wheatstone bridge, with internal batteries or optional external battery.  No... 
USA  20 Galvanometer No 81    
USA  65 Wheatstone Bridge 5305 Type S-2   Wheatstonesche Messbrücke, speziell für die Messung und Fehlerortung an Fernmeldeleitun... 
USA  30 Potentiometer K2   Potentiometer type K2.  Bakelite case with wooden base. Measuring instrument used ... 


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