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).
Test report on tungsten points from the Independent Lamp and Wire Co. noting defects and sparking.
| Identifier | ExFiles\Box 35\6\ scan 011 | |
| Date | 16th December 1920 | |
| R.R. 136A (100 T) (S.H. 798, 16-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1947 -2- Contd. A pair of tungsten points by the Independent Lamp and Wire Co., which have been run on a car, showed the same defects to a greater degree. These were of smaller diameter than the Liberty points. A fair amount of sparking has occurred at the contacts throughout the above test. Contacts herewith. P.J.A. | ||