Letter from S. Smith & Sons regarding the dispatch and testing of a miniature Automatic Jet Control unit.
| Identifier | ExFiles\Box 123\1\ scan0115 | |
| Date | 13th August 1938 | |
| 108 1038 CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY BY APPOINTMENT TO HIS MAJESTY THE KING TELEPHONE: GLADSTONE 3333 (20 LINES) TELEGRAMS: SPEEDOFAC, PHONE, LONDON. CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. S. Smith & Sons (Motor Accessories) Ltd CRICKLEWOOD WORKS LONDON, N.W.2 BRANCHES AT PARIS MILAN SYDNEY WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES SHOWROOMS & DEPOTS 179-185 GT PORTLAND ST LONDON, W.1. 26-33, COX ST LIVERY ST BIRMINGHAM 14a JACKSONS ROW DEANSGATE MANCHESTER 21, DRURY STREET GLASGOW DUBLIN & BELFAST Please quote our reference: S.10 13th August 1938. Messrs. Rolls-Royce Limited, DERBY. Dear Sirs, For the attention of Mr. C.T. Salt. Confirming our telephone conversation this morning concerning the miniature Automatic Jet Control, which we are today despatching under separate cover marked for your attention, this unit was placed on test and at 18" of vacuum gave a lift of 5m/m. this representing half its total stroke. When the water in contact with the outer casing reaches a temperature of 50°C, the centre spindle commences to move and the opening is progressive until a temperature of 74°C. is reached when the unit is then fully open, or in other words, the centre spindle is fully extended to its total stroke of 10m/m. As mentioned to you over the 'phone we are also sending you one clamping ring with four holes drilled to enable you to clamp the unit to your casting. It is essential that the casting should have a small register in order that our rubber sealing ring will make a water-tight seal, the principle being exactly the same as that of our larger unit with which you are already familiar. Yours faithfully, For S. SMITH & SONS (MOTOR ACCESSORIES) LIMITED. A.W. Perkins. To avoid delay all envelopes should be addressed to the firm. | ||
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).