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 Wiggin & Company advising on the unsuitability of Brightray wire and recommending oxidised Ferry wire for resistances.
| Identifier | ExFiles\Box 167\3\ img085 | |
| Date | 27th August 1937 | |
| MONEL NOTES A series of publications for those engaged in the Power, Chemical and Process Industries Sent Free on request Y13 OUR REF. FT/EB/224 6110? CHILDS FOUNDED 1835 Wiggin & Company, Limited. Incorporating the business formerly carried on by Monel-Weir Limited Wiggin Street, Birmingham, 16. 27th August 1937. RMR/RC{R. Childs} Messrs. Rolls-Royce Limited, DERBY. Dear Sirs, We thank you for your letter of the 26th inst., and would advise you that Brightray wire is unsuitable for close wound resistances in view of the fact that the oxide coating is not definitely insulating. We would suggest, therefore, that you consider using our oxidised Ferry, which is extremely suitable for work of this nature, and have arranged to send you (marked for the attention of Mr.R.M.Child) a sample reel of 33 s.w.g., which will carry .8 amps. without attaining a temperature of 300°C. We have pleasure in enclosing a copy of our ELECTRICAL RESISTANCE BOOKLET, which we trust you will find of interest. Yours faithfully, FOR HENRY WIGGIN & COMPANY LIMITED, TECHNICAL SERVICE DEPARTMENT. All Contracts and/or Orders are subject to Sellers' Standard Conditions of Sale (overleaf) and, unless otherwise stated, are accepted by Sellers at prices ruling at time of receipt; all quotations are liable to alteration accordingly. | ||