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).
Instruction note regarding the contact resistance of tungsten contacts.
| Identifier | ExFiles\Box 35\5\ scan 136 | |
| Date | 24th January 1919 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 88212 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Contact Resistance of Tungsten (contd) Order No. Customer's No. 4 Re. The fact that point contacts show less resistance than plane contacts, suggests that a film of oxide, resides on the surface of the metal which in the former case, is pierced. Signed: Francis J Allen This Sheet must be filed on completion of the work. | ||