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 concerning issues with security bolts and valve plates on tyres.
| Identifier | ExFiles\Box 45\1\ Scan275 | |
| Date | 26th July 1922 | |
| X 4050 TELEGRAMS: "DUNLOPS BIRMINGHAM." TELEPHONE No.: ERDINGTON 261 (PTE. BR.{T. E. Bellringer - Repair Manager} EX.) EXTENSION............ BY APPOINTMENT. DUNLOP RUBBER CO LTD FOUNDERS OF THE PNEUMATIC TYRE INDUSTRY. STATION: CASTLE BROMWICH (MID. RY.). GOODS: TO DUNLOP SIDINGS, CASTLE BROMWICH. ROUTE: TYBURN ROAD FROM STEELHOUSE LANE. To FORT DUNLOP WORKS, CAR 63. REGISTERED OFFICES: DUNLOP HOUSE, 1, ALBANY STREET, LONDON, N.W. 1. ALL COMMUNICATIONS TO BE ADDRESSED TO THE FIRM. FORT DUNLOP, ERDINGTON, BIRMINGHAM. PLEASE QUOTE REFERENCE. Service Manager. WB.{Mr Brazier/Mr Bell}GG.24-287. 26th July. 1922. Dict. 25th. Messrs. Rolls-Royce Ltd. Nightingale Rd, DERBY. For the attention of Mr. Harvey Bailey. Dear Sir, We are now confirming the writer's conversation with you on the subject of security bolts and valve plates. As informed you, occasional complaints are received from Rolls Royce owners of Cord Covers blowing off the rims, and as we know that the cause of such occurrences can only be due to a lack of inflation pressure allowing at some critical stage, the bead to lose its hold in the clinch of the rim, we have found that this is caused by the use of the conventional type of security bolts. The beads of Cord Tyres being necessarily larger, and of a different design from those of Canvas Tyres, do not allow the ordinary security bolt to come down into place. As a result of this the inflated tube is forced into the space which is left underneath the | ||