Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,155 pages of information and 233,681 images on early companies, their products and the people who designed and built them.
of 9-13 Newton Road, Leeds, 7. Telephone: Leeds 41036-7. Cables: "Pyrometer, Leeds"
1943 Patent - Improvements in electric voltage measuring instruments. 
1947 British Industries Fair Advert for Instruments: Resistance, Thermo-Electric, Radiation and Optical Pyrometers; Portable and Fixed Indicators; Recorders and Controllers; Voltmeters and Ammeters with Moulded Cases; Resistance elements and Thermocouples and all Associate Equipment. (Scientific and Optical Section - Olympia, Ground Floor, Stand No. A.1106)