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 memorandum detailing the markings for different types of sparking points and a proposed test.
| Identifier | WestWitteringFiles\F\January1921\ Scan47 | |
| Date | 28th January 1921 | |
| Contd. -2- EFC6/T28.1.21. The stainless steel sparking points are marked SS{S. Smith} and the rotor marked "Stainless" as with "Silver" above. The nickel-brass points are marked NB and NB is marked on the side of the rotor. The pure nickel points are marked N and the N is placed on the side of the rotor. The Nichrome are marked "NM" and "NM" is placed on the side of the rotor. If, after examination of these Mr. Royce thinks it worth while making a test of any such distributor sparking points in special metals on experimental or test cars, we shall be glad to receive his instructions. (Handwritten) The rotor in all cases was the positive pole of the arc discharge. EFC. | ||