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).
Recommendation to use Tungsten-Copper alloy for switch contacts due to its low resistance and non-oxidizing properties.
| Identifier | ExFiles\Box 142\3\ scan0319 | |
| Date | 19th August 1937 guessed | |
| -3- We consider the performance of the switch to be very satisfactory, but would recommend that the contacts be tipped with a Tungsten-Copper alloy such as Elmet "L" which is manufactured by the Compound Electro Metals Ltd. London. This alloy has the advantage of a permanent low contact resistance, a high welding point and a surface which does not oxidize. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||