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 proposing a patented system for identifying terminal wires using marked rubber sleeves.
| Identifier | ExFiles\Box 168b\2\ img072 | |
| Date | 18th March 1922 | |
| X 802 BANKERS: ROYAL BANK OF SCOTLAND PURE FRUIT EXTRACTS. PURE FRUIT ESSENCES. ESSENTIAL OILS, COLOURS, ETC. TELEPHONE: DOUGLAS 3264. TELEGRAMS: 'MULGABILL' GLASGOW. CODES: A.B.C. 5TH EDITION BENTLEY'S W. Caig Mitchell & Co. EXPORT & IMPORT MERCHANTS 231 Sauchiehall Street, Glasgow, 18th March, 1922. In reply please quote Your reference Messrs. Rolls-Royce, Ltd., Nightingale Road, Derby. Dear Sirs, Having patented an improvement for the purpose of identification of terminal wires of the lighting and starting system of a car, I should be glad to know if you are interested. The raison d'etre of this system is to avoid damage to the battery, dynamo, etc. by eliminating the possibility of wrong connections being made during adjustment and repairs and by simplifying the work of the electrician. The system takes the form of small rubber sleeves, two to each wire and drawn over the end of the wire, fitting snugly round the insulation. These sleeves have letters and figures thereon giving an indication of the terminal from which the wire emanates and to which it is attached at the other end. They are also specially marked to indicate whether the wire is negative or positive. If you are interested I shall be grateful if you will let me have a copy of your wiring diagram along with small samples of the wire used when I could supply you with suitable samples. Thanking you in anticipation, I am, Yours faithfully, W. Caig Mitchell | ||