Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,110 pages of information and 233,634 images on early companies, their products and the people who designed and built them.
of Grosvenor Place, London, SW1. Telephone: Sloane 5629. Telegraphic Address: "Trollair, Knights"
1937 British Industries Fair Advert as part of Incandescent Furnace Group. Designers and Manufacturers of Continuous Conveyor and Batch Type Ovens for all Industrial Finishes and Drying Processes. (Engineering/Metals/Quarry, Roads and Mining/Transport Section - Stand Nos. D.327 and D.226)
1952 Patent - An improved apparatus for filtering dust from gases.
1955 Patent - Improvements in air or gas heaters with heat storage means.