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 British Insulated Cables Ltd. offering a specification for a 3-core L.T. cable.
| Identifier | ExFiles\Box 168b\2\ img273 | |
| Date | 4th December 1934 | |
| xlane. TELEGRAMS: LIMITED, HELSBY. TELEPHONE No 66. WORKS: PRESCOT AND HELSBY. REGISTERED B TRADE MARK HEAD OFFICE: PRESCOT, LANCS. TELEGRAMS: 'INSULATOR, PRESCOT'. TELEPHONE No 6571 PRESCOT. TEN LINES - PRIVATE BRANCH EXCHANGE. British Insulated Cables Ltd. Makers of B.I. CABLES HELSBY, NEAR WARRINGTON. Manufactures: Messrs. Rolls-Royce, Ltd., DERBY. PLEASE ADDRESS THE COMPANY AND REFER TO EAB/FJ. 4th. December, 1934. [Left Margin Product List:] ALUMINIUM. SHEETS & SECTIONS. BOXES. JOINT, SERVICE & NETWORK. CABLES. FOR ALL ELECTRICAL PURPOSES. COMMUTATOR BARS. Ref. Ha/Wst 2/MA. 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, RUBBER COVERED, TROLLEY. WIRING SYSTEMS. WST Dear Sirs, We thank you for your letter of the 29th. ult., and have carefully noted your remarks. We have assumed that you require the overall diameter of the 3-core L.T. cable equal to that of Uniplug Metal braided Cable, and with this in mind we offer cable to the following specification - 3-core cable each conductor 23/.0076" tinned copper wires insulated with vulcanised rubber to .136" dia, cores distinguishable, twisted together, wormed circular with cotton, taped with 2 varnished cambric tapes each applied with ½ overlap, braided with 36 swg. tinned copper wires overall. Should this not meet with your approval please let us know and we will endeavour to put forward a cable to meet your wishes. Yours faithfully, British Insulated Cables Limited HH. b. a.{Mr Adams} Bayles Works Manager Helsby. | ||