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 their investigation into suitable Bourdon tube and diaphragm type pressure gauges.
| Identifier | ExFiles\Box 44\4\ Scan117 | |
| Date | 29th March 1930 | |
| X4038 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: CHISWICK 4231 (4 LINES) TELEGRAMS: "ASSEMBLAGE, LONDON" MANUFACTURERS OF Hobson KS Petrol Telegage AND MOTOR ACCESSORIES. WORKS: LONDON AND WOLVERHAMPTON. H.M. HOBSON, LTD. (ESTABLISHED 1903) 47-55, ACTON VALE, LONDON, W.3. OUR REF: TPS/MW YOUR REF: Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/MJ 29th March 1930. For attention of W.A.Robotham, Esq., Messrs.Rolls-Royce,Ltd., Expl. Dept. Derby. Dear Sirs, With reference to your letter of the 12th inst., and our replies thereto of the 13th and 14th, we have been in communication with the manufacturers of the Bourdon tube for pressure gauge purposes, Messrs. The Budenberg Gauge Co. Ltd., who inform us that they are not of the opinion that they could supply a Bourdon tube which would be satisfactory for the purpose of measuring the pressures required on our type of petrol gauge. We are continuing to make enquiries, both here and abroad, with regard to a diaphragm type of unit, which appears all that is left, but from preliminary enquiries which the writer made when he was abroad, we do not think that this type can be in any way as accurate or as consistent as the "U" tube type of unit for measuring the pressures available. We are, however, still | ||