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of Tyburn Road, Erdington, Birmingham 24. Telephone: East 1121. Telegraphic Address: "Ether, Birmingham". (1937), Temperature measurement and control apparatus for industry.
1923 Business established
1937 Listed Exhibitor - British Industries Fair. Temperature Measuring Instruments, including Indicating Pyrometers, Temperature Recorders, Automatic Temperature Controllers for Gas, Oil, Electric Furnaces. Molten-Metal Pyrometers. Surface Contact Pyrometers. Optical Radiation Pyrometers. Moving Coil Galvanometers. Thermometers. (Stand Nos. Ca.709 and Ca.608)
1945 Advert. Pyrometers.
1964 Name changed to Ether Controls Ltd
1964 The name of J. Langham Thompson Ltd was changed to Ether Langham Thompson Ltd
1968 Patent - Improvements in or relating to Adjustable Valves.
1968 Name of Ether Langham Thompson Ltd was changed to Ether Engineering Ltd
1970 Name of Ether Engineering Ltd changed to Pye Dynamics Ltd
At some point formation of Pye Ether Ltd