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 for using a Tungsten-Copper alloy (Elmet) for switch contacts.
| Identifier | ExFiles\Box 168a\2\ img350 | |
| Date | 2nd July 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 " " 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}/KC. | ||