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. concerning the discolouration of K-S Telegage fluid dye.
| Identifier | ExFiles\Box 61\3\ scan0177 | |
| Date | 9th May 1931 | |
| X. 11038. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS TELEPHONE: SHEPHERDS BUSH 3321. (4 LINES) TELEGRAMS: "ASSEMBLAGE, LONDON." 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. ENCLO. OUR REF. TPS/AML YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}8/KT. 9th May, 1931. For the attention of W.A.Robotham,Esq. Messrs. Rolls-Royce Ltd., Experimental Dept., Derby. Dear Sirs, We are at a loss to understand the cause of the K-S Telegage fluid losing its colour in the latest type gauge heads of which you speak. We should be obliged if you could let us know as to whether the liquid in question originally had the purple coloured dye,or the scarlet coloured dye similar to the sample which we are sending you in bottle under separate cover to-day. This scarlet colour was found to be a faster dye than the purple or violet colour dye, and as far as our experience goes with the scarlet, we have not had any pronounced cases of fading under our observation during the last three to four years, but with the purple dye there were undoubtedly | ||