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 The L.P.S. Electrical Co regarding the supply and composition of Tungsten Contacts for Contact Breakers.
| Identifier | ExFiles\Box 35\5\ scan 038 | |
| Date | 14th June 1918 | |
| X 2894 Telephone: VICTORIA 7346. Telegrams: ENGINEYOR, SOWEST, LONDON. Codes: A.B.C. 5TH EDITION. LPS Logo TUNGSTEN CONTACTS. INSULATING MATERIALS. TEST CLIPS. THE L.P.S. ELECTRICAL Cº (J.{Mr Johnson W.M.} LERMAN, BRITISH OF RUSSIAN ORIGIN) YOUR REFERENCE EPQ6/T10618. OUR REFERENCE L. 14, Howick Place, Westminster, London, S.W.1. 14th June, 1918. L.P.S. Insulating Sleeving A MOST CONVENIENT AND EFFICIENT INSULATION FOR ALL INTERNAL CONNECTIONS IN ELECTRICAL APPARATUS. IS. Messrs. Rolls-Royce, Ltd., Nightingale Road, DERBY. Dear sirs, We are in receipt of your letter of the 10th instant, and are sorry to hear that you have lost trace of the Contact Breakers to which we fitted Tungsten Contacts. We fortunately have left a pair of the same composition Tungsten Contacts which we fitted before, and we will have these fitted to the Contact Breakers which you have now sent us, within the next few days and return to you. The Contacts which we sent you are not of pure Tungsten but of a special composition, and we have no Wire in stock other than Pure Tungsten Wire. The composition Contacts sent you represent but one of the types which we have under test, and we shall not be in a position to make any Wire or Rod of the same material until we have decided upon the exact composition that is suitable for Magneto service. Pure Tungsten is quite suitable owing to the great heat engendered in the Magneto. | ||