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 sheet detailing experiments on the contact resistance of tungsten rods.
| Identifier | ExFiles\Box 35\5\ scan 135 | |
| Date | 24th January 1919 | |
| RR.500 (120B) (SP{Mr Spinney} 349 24-1-19) MP 200552 88211 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Contact Resistance of Tungsten (Cont'd) Order No. Customer's No. 3 Re 9 amps. to 10 amps. After these experiments, the faced ends of the rods were discoloured by causing inductive sparking between them for some time, and the above tests repeated. The results, however showed no perceptible deviation from the first tests. All contacts were made under considerable pressure (roughly 5 lbs) Fig 3. Signed (Cont'd) This Sheet must be filed on completion of the work. | ||