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 an electrical contractor advising on the best wire (Nichrome) for heating elements in electric soldering irons.
| Identifier | ExFiles\Box 63\1\ scan0148 | |
| Date | 3rd June 1924 | |
| Telephone No 1035. MEMO FROM Head Office & Works - 77A SIDDALS ROAD, DERBY. BATTERBY & HEFFORD ELECTRICAL ENGINEERS AND CONTRACTORS B&H DERBY YOUR REF. EFC1/T OUR REF. GSB/PJG DERBY M E.{Mr Elliott - Chief Engineer} Fowler Clark. Esq. C/o Messrs Rolls-Royce, Ltd. 3rd. JUNE 1924. SPECIALISTS IN COMPLETE ELECTRIC LIGHTING, POWER AND HEATING INSTALLATIONS : ARMATURE WINDING, ETC : MOTOR STARTER REPAIRS. REPAIRS TO ALL CLASSES OF : HEATING APPLIANCES. : SHAFTING, GEARING AND MILLWRIGHTING IN ALL : : ITS BRANCHES. : : TELEPHONES, BELLS, : : : : MAGNETOS, ETC. : : ELECTRIC SIGNS. : : AGENTS FOR FULLERS : : : : SPARTA BATTERIES : ACCUMULATORS CHARGED. : PROMPT ATTENTION GIVEN : : TO BREAKDOWNS. : : PERSONAL ATTENTION GIVEN TO ALL WORK UNDERTAKEN. Handwritten: X.3035 X.1623. Dear Sir, In answer to your letter of the 2nd. inst., we beg to offer the following information, The best wire we find to use for Electric Soldering Irons for Heating Elements is Nichrome, it strongly resists oxidation and is practically non corrosive, has a melting point of approx. 250 C to 3000 F.{Mr Friese} and has a specific resistance of 660 ohms per circular mil foot and a temperature coefficient of electrical resistivity of .000095 per 1° F.{Mr Friese} Assuring you of our best service at all times, we are, Yours faithfully, BATTERBY & HEFFORD. G.S. Batterby | ||