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 C. Melin & Co. introducing their 'NEO-TUNGSTEN' screw contacts for magnetos and contact breakers.
| Identifier | ExFiles\Box 35\6\ scan 023 | |
| Date | 15th February 1921 | |
| C. MELIN & CO E.{Mr Elliott - Chief Engineer} DURAND. ESTABLISHED IN 1865. HL X. 2894 16 FEB 1921 Telegrams: "REPLETE PHONE, LONDON" Telephone 4010 AVENUE. 7. INDIA STREET, CRUTCHED FRIARS, RECEIVED LONDON, E.C.3. AND AT PARIS. X.2894. TUNGSTEN CONTACTS. RECEIVED 16 FEB 1921 LONDON 15 FEB 1921 Dear Sirs, We have pleasure in making known to you that we are in a position to supply our well-known "NEO-TUNGSTEN" CONTACTS. Many attempts have been made in the past to replace the usual Platinum Contacts by a less costly material, but hitherto these attempts have not been a success. The chief causes of failure to give satisfaction have been the breaking away of the contacts from the screw to which they were attached; a tendency for the tungsten tip to become rapidly oxidized, and lastly that the tungsten tips hitherto used have worn away at the edges after a very short period of service, thus rendering the contact unreliable, and in some cases, useless. These drawbacks to an otherwise desirable substitute have been, after a long period of tests and examinations, entirely overcome. We are now in the position to offer you our new "NEO-TUNGSTEN" Screw Contacts for Magnetos, Contact breakers, and invite you to give these a thorough trial under actual working conditions, in full confidence that the results obtained will amply bear out the claims we make for them. These are, briefly:- (1). The "NEO-TUNGSTEN" is a specially high grade metal, offering in use a minimum of oxidization, scarcely any wear, and a long life. (2). The new process of welding the tip to the screws ensures a perfectly secure joint, and entirely obviates the old fault of the tip breaking away from the contact when the magneto is running. We feel sure that a trial of these "NEO-TUNGSTEN" tips will convince you of their superiority as a substitute for the platinum tips. We shall be pleased to forward to you a sample pair of Screw Contacts for test purposes, should this matter be of interest to you. We are, Dear Sirs, Yours faithfully, for C. MELIN & CO., [Signature] | ||