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 L.P.S. Electrical Co. advocating for the use of Tungsten over Platinum for electrical contacts.
| Identifier | ExFiles\Box 35\5\ scan 001 | |
| Date | 19th January 1917 | |
| TELEPHONE: REGENT 4346. CODE: A.B.C. 5TH EDITION. WORKS: 1a, FOREST LANE, STRATFORD, LONDON. E.{Mr Elliott - Chief Engineer} TELEGRAMS: "ENGINEYOR, WESTRAND, LONDON." THE L.P.S. ELECTRICAL CO. L.P.S. Insulating Sleeving. A MOST CONVENIENT AND EFFICIENT INSULATION FOR ALL INTERNAL CONNECTIONS IN ELECTRICAL APPARATUS. No. 12. (Insulated) Universal Test Clip. TIME SAVERS IN ANY ELECTRICAL WORK REQUIRING QUICK TEMPORARY CONNECTIONS. Your Ref. Our Ref. L. X. 2894. 18, ADAM STREET, STRAND, LONDON. W.C. 19th January, 1917 Messrs. Rolls, Royce Limited, Nightingale Road, Derby. Dear Sirs, TUNGSTEN CONTACTS. [STAMP: RECEIVED 20 JAN 1917] We beg to call your attention to the use of Tungsten in place of Platinum for Electrical Contacts, and would point out the following considerations:- 1). Tungsten is harder than Platinum, and has a much higher Melting Point, that of Tungsten being 3,000° C. whereas the Melting Point of Platinum is 1,755° C. 2). Tungsten is much cheaper than Platinum, and nearly as cheap as the usual Gold-Silver alloy, used for cheaper Contacts. We supply Contact Rivets made of a solid Tungsten head to which a Steel shank is electrically welded. The shank can be spun down by an ordinary spinning tool. Hoping we may have the pleasure of dealing with your early enquiries, We remain, Yours faithfully, THE L.P.S. ELECTRICAL Co [Handwritten notes:] [Top left:] Mr Mills [Bottom left:] Mr. Mills Kindly order H e12487 e12488 | ||