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. regarding the calibration of a spark gap.
| Identifier | ExFiles\Box 167\3\ img071 | |
| Date | 17th June 1937 | |
| 6110: TELEGRAMS: "LIMITED, HELSBY." REGISTERED TELEPHONE No 66. WORKS: PRESCOT AND HELSBY. 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 Messrs. Rolls Royce Ltd., DERBY. HELSBY, NEAR WARRINGTON. 17th June, 1937. PLEASE ADDRESS THE COMPANY AND REFER TO HH/FGB. Your Ref. RM{William Robotham - Chief Engineer}/Wst. 4/JH. Dear Sirs, We thank you for yours of the 14th instant and note the spark gap has been calibrated for 10,000 peak. As suggested, we shall take special care in re-checking the gap. Thanking you for your assistance. Yours faithfully, British Insulated Cables Limited. H.{Arthur M. Hanbury - Head Complaints} Higham Chief Electrician. Left Margin Text: Manufactures: ALUMINIUM. SHEETS & SECTIONS. BOXES. JOINT, SERVICE, NETWORK. CABLES. 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. WL. Bottom Left Logo Text: NATIONAL SCHEME FOR DISABLED MEN | ||