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 a supplier regarding the ozone resistance testing of an ignition cable.
| Identifier | ExFiles\Box 61\1\ scan0316 | |
| Date | 14th August 1936 | |
| British Insulated Cables Ltd., Makers of B.I. CABLES TELEGRAMS: "LIMITED, HELSBY." TELEPHONE Nº 66. WORKS: PRESCOT AND HELSBY. HEAD OFFICE: PRESCOT, LANCS. TELEGRAMS: "INSULATOR, PRESCOT" TELEPHONE Nº 6571 PRESCOT. TEN LINES - PRIVATE BRANCH EXCHANGE Handwritten Reference: WST 6110 Manufactures: ALUMINIUM. SHEETS & SECTIONS. BOXES. JOINT, SERVICE, NETWORK. CAB. FOR ALL ELECTRICAL PURPOSES. COMMUTATOR BARS. COMPOUNDS. CONDENSERS. STATIC. COPPER. STRANDS & SECTIONS. FLEXIBLES. FUSE BOXES. KNIFE SWITCHES. METERS. OVERHEAD EQUIPMENT. RAILWAY, TRAMWAY, LIGHT & POWER. PAPER PINIONS. PILLARS & KIOSKS. RAIL BONDS. VARNISHES. WELDERS. ELECTRIC. WIRE. ALUMINIUM. COPPER. COTTON COVERED. ENAMELLED. SILK COVERED. FUSE. TROLLEY. WIRING SYSTEMS. Messrs. Rolls-Royce Ltd., DERBY. HELSBY, NEAR WARRINGTON. PLEASE ADDRESS THE COMPANY AND REFER TO WKS/CW. Your ref:- Hs{Lord Ernest Hives - Chair}/Wst.7/MA. 14th August, 1936. Dear Sirs, B.I. 7 m/m Ignition Cable. We have your letter of the 13th inst., and regret to note that according to the results of your laboratory tests, the dielectric on our Ignition Cable is not as resistive to ozone as it was about a year ago. These results are quite contrary to those obtained here, and we shall be obliged if you will let us have details as to your methods of testing. In the meantime we are taking the liberty of having another 12 yard length of 7 mm Ignition Cable sent to you for further testing. Yours faithfully, [Signature] DEPUTY TECHNICAL OFFICER British Insulated Cables Ltd Helsby. near Warrington | ||