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 operation of Nivex petrol gauges.
| Identifier | ExFiles\Box 44\4\ Scan111 | |
| Date | 13th 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". H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} HOBSON, LTD. (ESTABLISHED 1903) 47-55, ACTON VALE, LONDON, W.3. MANUFACTURERS OF Hobson K-S Petrol Telegage AND MOTOR ACCESSORIES. WORKS: LONDON AND WOLVERHAMPTON. OUR REF. TPS/MW YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/MJ. 13th March 1930. For the attention of W.A.Robotham, Esq., Messrs. Rolls-Royce,Ltd., Expl. Dept. Derby. Dear Sirs, Re Petrol Gauges. In reply to your letter of the 12th inst., we are not quite familiar at the moment with the type of Nivex gauge to which you refer, except that we have always understood that this gauge used a diaphragm or Bourdon tube element for recording the pressure in the dash instrument. This type of gauge, as far as our information goes,has either (1) a hand air pump or (2) a constant air replacement device, working in conjunction with the vacuum feed fuel supply. It is fully realised that if a Bourdon tube can be made at a commercial price, sufficiently sensitive to continue to record the very small pressure differences required, and | ||