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 Johnson & Phillips Ltd. regarding difficulties in manufacturing a specific cable for replacement order R. 16835.
| Identifier | ExFiles\Box 167\3\ img111 | |
| Date | 21th May 1938 | |
| SPECIALISTS IN THE TRANSMISSION, TRANSFORMATION AND CONTROL OF ELECTRICITY. TELEPHONES: GREENWICH 3244 (10 LINES) GREENWICH 0047 (BUYER ONLY) TELEGRAMS: 'JUNO, CHARLTON-KENT'. ESTABLISHED 1875. CABLES: 'JUNO, LONDON'. CODES: BENTLEY'S, MARCONI AND HAMILTON. NEW STANDARD. JOHNSON & PHILLIPS, LIMITED ELECTRICAL ENGINEERS AND CABLE MAKERS. CHARLTON LONDON, S.E.7. LONDON OFFICES: COLUMBIA HOUSE, ALDWYCH, W.C.2. TELEPHONES: HOLBORN 7676 (8 LINES) TELEGRAMS: 'JUNO, LONDON'. BRANCHES IN BIRMINGHAM, BRADFORD, BRISTOL, CARDIFF, GLASGOW, IPSWICH, LIVERPOOL, MANCHESTER, NEWCASTLE-ON-TYNE, PORTSMOUTH. SYDNEY, MELBOURNE, ONTARIO. WELLINGTON, JOHANNESBURG, DURBAN, NAIROBI, CAIRO, CALCUTTA, BOMBAY, SHANGHAI, MALAYA, GOLD COAST, BURMA, CEYLON, MALTA. YOUR REF. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} 8/JH. OUR REF. SN.{Mr Sanderson} 13886. C.W.C. 21st May, 1938. Messrs. Rolls-Royce Ltd. Nightingale Road, DERBY. Dear Sirs, RE: Your Replacement Order No. R.{Sir Henry Royce} 16835. With reference to your letter of the 17th inst. addressed to our Birmingham Office, we confirm the explanation given you by our Birmingham Representative regarding the extreme difficulty of manufacturing this cable within the prescribed limits of diameter. It will be appreciated that in covering the conductor with a thickness of such an elastic material as this special rubber compound, it is very difficult indeed to ensure that the required thickness of insulation is provided, and at the same time, the maximum diameter of .276" is not exceeded, particularly when it is remembered that the rubber has to be vulcanised after application - a heat-treatment process during which the material is liable to swell. | ||