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 The British Thermostat Co. Ltd. regarding a manufacturing and testing difficulty with Bentley Thermostats and the new jig created to resolve it.
| Identifier | ExFiles\Box 156\2\ scan0130 | |
| Date | 24th September 1938 | |
| Telephone: SUNBURY-ON-THAMES 456 (6 LINES) Telegrams & Cables: THERMOSTAT, SUNBURY-ON-THAMES. Code: BENTLEY'S THE BRITISH THERMOSTAT CO., LTD. Makers of Scientific Instruments. DIRECTORS: COL. N. HUDSON. J.{Mr Johnson W.M.} E.{Mr Elliott - Chief Engineer} SHERLOCK MANAGING. W.F.P. MARTIN-HURST L.S. SWINNERTON DYER. F.{Mr Friese} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} POPLETT. TEDDINGTON WORKS. Windmill Road, Sunbury-on-Thames, Middlesex. Handwritten: FW 1328 Your Ref: Rm{William Robotham - Chief Engineer}/Std.14/MH{M. Huckerby}: WMH/GN: September 24th, 1938. Handwritten: h/w Rm{William Robotham - Chief Engineer}/802. Messrs. Rolls-Royce Ltd. DERBY. Dear Sirs, For the attention of Mr.Steadman. We thank you for your letter of September 22nd. The writer has personally investigated the method of manufacture in connection with the Bentley Thermostats, and has made certain modifications. It appears that a difficulty of which he was unaware presented itself when he gave instructions that your own casting was to be used for temperature testing these units. This was due to the inability of the operator to get at the nut on the spindle to lock it up in the correct position when the unit was in the casting. We have, therefore, made an open frame jig having dimensions identical with your own castings, and this should once and for all settle the matter. Six units have been made up on the new jig, and the temperature operation is absolutely spot on. We would like to apologise for the fact that this difficulty was not noticed before as we appreciate that certain modifications were made to the bellows unit to enable us to assemble and test it in our customary manner. We take this opportunity of referring to the | ||