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).
Continued report on issues with a copper electrode, detailing loosening problems and potential material solutions.
| Identifier | ExFiles\Box 79\1\ scan0136 | |
| Date | 13th September 1918 | |
| Contd. -2- EH2/LG13.9.18. let into the copper electrode, after a number of hours it works loose. We have tried, and find that we can weld a 95% nickel alloy very successfully to a sopper pin. This alloy is the same as the "Bosch" use on their plugs so that it should give good results. The other point we have had trouble with is that the outside insulation is made up of mica washers, it means that a good tension has to be put on the copper pin to compress these washers solid and to hold them in place. We find that the copper pins stretch and let these washers come loose. We hope to overcome this by using a different insulating marerial for the outside; the insulation there does not have extreme conditions. EH. | ||