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 Adamant Engineering Company regarding the supply and specifications of Marles steering gear components for a Bentley car.
| Identifier | ExFiles\Box 28\2\ Scan204 | |
| Date | 16th June 1933 | |
| Y409/1 Telegrams: "ADAMANT, Phone, Luton." CONTRACTORS TO H.M. ADMIRALTY, WAR OFFICE & AIR MINISTRY. Telephone: LUTON 1818 (2 LINES). ADAMANT ENGINEERING COMPANY, LIMITED (Incorporating J.{Mr Johnson W.M.} C. THREADGOLD & SONS. Established 1878.) Engineers and Founders. SPECIALISTS in the DESIGN and MANUFACTURE of HIGH PRECISION TOOLS, JIGS, FIXTURES, etc. SPECIAL MACHINES, SPECIAL MACHINE TOOLS, and ACCURATE PRODUCTION WORK. SOLE MANUFACTURERS and SALES AGENTS for the MARLES and MARLES-WELLER STEERING GEARS. Directors: S. CARLTON SMITH, A.M.I.MECH.E., M.I.P.E. ENGR. LT.-COMMANDER F.{Mr Friese} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} MATRAVERS, R.N., M.A. (CANTAB), A.M.I.MECH.E., A.M.I.A.E., M.I.P.E. O.{Mr Oldham} CARLTON SMITH, M.A. (CANTAB), F.I.S.A., M.I.P.E., Secretary. ALFRED SLATTER, M.I.E.E. J.{Mr Johnson W.M.} W. HAZEL, F.I.S.A. Your Ref: Rm.{William Robotham - Chief Engineer}7/KT. Our Ref: FGM/AGS/CE. Head Offices, Works and Design Dept.: DALLOW ROAD, LUTON. 16th. June, 1933. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, For the attention of Mr. Robotham. We are duly in receipt of your favor of the 15th instant, reference as above, contents of which we have carefully considered. We note that the drop arm for the Marles-Weller Gear is to be despatched to us on Saturday, and as regards the Gear, we hope to complete this on Tuesday or Wednesday of next week, so that it should be well in time for fitting on the Bentley car which it is proposed to send to France. We duly note that the matter of Controls is now cleared up. As regards the Marles Gear for the Bentley Car, we would put forward our L.7 Gear also, as shewn on the drawing GA.2325, copy of which we enclose herewith. We would draw your attention to the fact that this Gear is based on a total maximum rockershaft movement of 65°, as against the 75° of the Marles-Weller Gear, so that it will be necessary to fit a longer drop arm to the Marles Gear than to the Marles-Weller Gear to get the same fore and aft movement of the drag link. On the other hand the gear ratio in the box of the Marles Gear is such that 3 1/4 turns of the wheel are required to give the 65° movement of the rockershaft, that is to say a gear ratio of 18 to 1. - 1 - | ||