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 S. Smith & Sons regarding the pre-compression of bellows on a shutter thermostat.
| Identifier | ExFiles\Box 39\4\ Scan244 | |
| Date | 16th April 1931 | |
| X3499. CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY BY APPOINTMENT TO HIS MAJESTY THE KING THE ENGINEERING AND ALLIED EMPLOYERS' NATIONAL FEDERATION TELEPHONE: NORTHERN 2724-5. TELEGRAMS: SPEEDOFAC, PHONE, LONDON. CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. S.Smith & Sons (Motor Accessories) Ltd BRANCHES AT PARIS MILAN SYDNEY WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES SHOWROOMS 179-185 Gt PORTLAND ST.{Capt. P. R. Strong} LONDON, W.1. also at 122, ALMA ST BIRMINGHAM 14a, JACKSONS ROW DEANSGATE MANCHESTER 19, WEST REGENT ST GLASGOW DUBLIN & BELFAST Head Office and Factories CRICKLEWOOD WORKS LONDON, N.W.2 [Strikethrough: 122, ALMA STREET BIRMINGHAM] 26-33 Cox Street, Livery Street, Birmingham. Please quote our reference: FGE/H Yours.HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/MJ 16 April 1931. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, For attention of Mr. Robotham. We beg to thank you for your letter of the 11th inst. to hand today. We note that the pre-compression of the bellows of the shutter thermostat is an advantage from your point of view, as tending to open the shutter in the event of puncture of the bellows. Whilst we think that a movement of .243" from the extended position may be increased, we do not think it would be possible to obtain a movement of .425", as this would result in the smashing of the bellows. We propose to instruct our Works to compress the bellows as far as it is safely possible to do so during assembly and before exhausting the instrument. We are of the opinion that a movement of .350" will then be possible. We note that you wish to retain the existing standard filling for this instrument, and that you are returning the sample for refilling with standard spirit. Yours faithfully, p.p.S. SMITH & SONS (Motor Accessories) LTD. F S Effad Midland Engineer. | ||