Reliability of platinum-iridium faces versus tungsten for contact points.
| Identifier | Morton\M1.8\ img014 | |
| Date | 1st July 1921 | |
| To R.R. of America Inc. from R. {Sir Henry Royce} -5- R8/G12/7/21 Contd. TUNGSTEN V. {VIENNA} PLATINUM. x2894. x1818. Mr. Hives now points out that the contact points should have platinum-iridium faces instead of tungsten if this would considerably add to the life of these contacts. Our own and the magneto makers find tungsten far less reliable than platinum-iridium faces. We shall continue to report and investigate for our mutual advance, but at the moment it appears that your complaints are clearing up nicely. R. {Sir Henry Royce} | ||
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).