From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter from H. M. Hobson Ltd. regarding an investigation into fading liquid in gauges believed to be caused by sunlight exposure.
| Identifier | ExFiles\Box 61\3\ scan0184 | |
| Date | 21th May 1931 | |
| 4038 TELEPHONE: SHEPHERDS BUSH 3321. (4 LINES). TELEGRAMS "ASSEMBLAGE, LONDON" CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} HOBSON, LTD. (ESTABLISHED 1903) 47-55, THE VALE, ACTON, LONDON, W. 3. MANUFACTURERS OF Hobson Motor Accessories. Claudel-Hobson Carburetters. Hobson-Perfect Window Regulators. Hobson K-S Petrol Telegages. Hobson Sparking Plugs. WORKS: - LONDON AND WOLVERHAMPTON. 21st May 1931 ENCLO. OUR REF. TPS/MW YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}2/KT. Messrs.Rolls-Royce,Ltd., Expl.Dept. Derby. For the attention of W.A.Robotham,Esq., Dear Sirs, We beg to acknowledge receipt of your letter of the 19th inst., and we thank you very much for having assisted us by collecting faded liquid from a number of gauges. We must confess that at the moment of writing we are still completely mystified as to the date at which any change was made in the liquid, the fading of which, from the valuable information which you have given us, is obviously in some way connected with exposure to sunlight. We have instituted here two separate series of tests for fading, one by the Paint & Colour Manufacturers Research Association, and another by experts in the manufacture of quartz and ultra-violet ray producing lamps, so that in a | ||