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).
From EFC to EP requesting a report on the operation of a pair of tungsten contacts.
| Identifier | ExFiles\Box 35\6\ scan 040 | |
| Date | 6th May 1921 | |
| X.2894. EFC2/T6.5.21. To EP.{G. Eric Platford - Chief Quality Engineer} from EFC. X.2894 - TUNGSTEN CONTACTS. Of the four sets of tungsten contacts sent under cover of our EFC3/T3.1.21, two pairs of which were marked "2" and two pairs marked "3", we have received back from you one pair marked "2", one pair marked "3" and a third pair which was for some time on the School Car. Have you any report to give us on the operation of the other pair marked "2",? EFC. | ||