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).
Trial of tungsten contacts for contact breakers.
| Identifier | ExFiles\Box 35\5\ scan 002 | |
| Date | 29th January 1917 | |
| R.R. 229 a (400 T.) (S.C. 536. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546 To O.O. from EFC. c. to Hy.{Tom Haldenby - Plant Engineer} c. to Ed.{J. L. Edwards} EFCG/T29117. 29th January 1917. X.2894 - CONTACT BREAKER CONTACTS IN TUNGSTEN. Herewith please receive two contact breakers taken from Watford magnetos. The platinum points of these contact breakers ( and others) have worn completely away in use, and we would like to try Tungsten contacts on these breakers, similar to those offered in a letter from the L.P.S. Electrical Co., copy of which herewith. We should be glad therefore, if you would send these contact breakers to the L.P.S. Electrical Co., and ask them to fit Tungsten contacts. We will then perform tests on the Watford magnetos fitted with these contacts. EFC. MADE AT CROXLEY | ||