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. discussing the design constraints and modifications for incorporating a fused seal into an existing instrument.
| Identifier | ExFiles\Box 61\3\ scan0097 | |
| Date | 11th September 1930 | |
| x4038. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. TELEPHONE: SHEPHERDS BUSH 3321. (4 LINES) TELEGRAMS: "ASSEMBLAGE, LONDON" PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. H.M. 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}2/MJ. 11th September 1930. Messrs. Rolls-Royce Ltd., Experimental Department, Derby. Dear Sirs, For attention of Mr. Robotham. We are in receipt of yours of September 8th, and have been carefully going into the points which you raise therein. 1. We know you will realise the necessity with which we were faced at the introduction of the fused seal, viz., that its incorporation should come within the existing overalls of the former instrument, and the retention of the length of scale, factors of safety at the top of the glass etc. Further, we have found it highly advisable to make the fuse of the seals to the flexible metallic tube of a certain minimum length, and in addition the bend in the flexible metallic tube must not be closer to the fused seal than it now is. This has given us only just room to get the taper portion of the seal, the seal itself, and | ||