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 the design and production of gauges.
| Identifier | ExFiles\Box 44\4\ Scan114 | |
| Date | 14th 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. 14th March 1930. For the attention of W. A.{Mr Adams} Robotham, Esq.. Messrs. Rolls-Royce, Ltd., Experimental Dept. Derby. Dear Sirs, Further to our letter of yesterday's date, the following has occurred to us as having a possible bearing on the general side of the gauge situation, as opposed to its purely engineering side. The abolition of the pressure balance air line is admittedly a great advantage, if the diaphragm or Bourdon tube type of gauge can be made accurate and consistent. It must be remembered that for matching up and appearance, your dials have to be photographically produced from a master, which precludes any question of inconsistent calibration of the instrument necessitating individual dials. | ||