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 Dunlop Rubber Co Ltd discussing modifications to tyre tread patterns to prevent them from picking up grit and stone.
| Identifier | ExFiles\Box 45\1\ Scan165 | |
| Date | 21th December 1920 | |
| X 4050 By Appointment To H.M. The King. DUNLOP RUBBER CO LTD FOUNDERS OF THE PNEUMATIC TYRE INDUSTRY. TELEGRAMS: 'COVERS, BIRMINGHAM' TELEPHONE No. EAST 920 (11 Lines) A.B.C. CODE, 5TH. EDITION, BENTLEY'S CODE. REGISTERED OFFICES: 'DUNLOP HOUSE,' 1, ALBANY STREET, LONDON, N.W.1. EN REPLYING PLEASE QUOTE ON BOTH LETTER AND ENVELOPE. ALL COMMUNICATIONS TO BE ADDRESSED TO THE FIRM. ASTON CROSS, BIRMINGHAM. Development P/H 21st December 1920. [STAMP: RECEIVED 24 DE 1920 ROLLS ROYCE LTD] Messrs. Rolls Royce Ltd., Nightingale Road, DERBY. Dear Sirs, Your Ref HS{Lord Ernest Hives - Chair}/TMW.5/LG. X.4050 We are obliged for your letter of the 20th inst., We quite appreciate the point you call attention to as to the liability of the modified pattern tread to pick up small bits of grit or stone in the circumferential grooves. This in the particular tyres you have is largely due to the fact that the groove is one cut into the rubber tread, and not a moulded one. Immediately we have your definite decision on the subject of the noiselessness of the pattern we shall alter our moulds to produce the pattern properly, and in doing so the groove in question would be moulded of a contour which would minimize this liability to the greatest possible extent. We are quite sure that you need anticipate | ||