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).
The unsatisfactory results of bench tests for two sets of tungsten contact points for magnetos.
| Identifier | WestWitteringFiles\F\January1921\ Scan37 | |
| Date | 25th January 1921 | |
| To R.{Sir Henry Royce} from EFC. c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Ds. c. to PN.{Mr Northey} c. to By.{R.W. Bailey - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to EWT. for R.R. Inc. ORIGINAL 41 EFC2/T25.1.21. X.2894 - TUNGSTEN CONTACT POINTS FOR MAGNETOS. We have experimentally tried two sets of tungsten points on magnetos, one lot were obtained from the Independent Lamp & Wire Co. already welded to the screws suitable for Bosch magneto - these we tried on a U.S.A. Bosch magneto. The other lot were fitted by the L.P.S. Co., in this country to the screws of a standard Watford magneto. Both these sets have been run on the bench, but in both cases they have not been at all satisfactory. The failures appear to start by an unusual amount of flashing taking place at the contact. EFC. R.R. 285A (100 D) (S.H 798, 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 | ||