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 further tests conducted on two different sets of tungsten contact points.
| Identifier | ExFiles\Box 35\6\ scan 057 | |
| Date | 13th August 1921 | |
| RR 238 (500 Bks.) (SF 152. 6-11-18.) MP 197880 X.2894. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: E.F.C Order No.: A.B.18. Customer's No.: 1 X.2894. Further Tests of Tungsten Contact Points. Two further sets of tungsten points by the Fansteel Co, have been tested; one (AD) having a condenser with an earthing terminal, and the other (AE) with the points arranged to work with a scrubbing action. With the former set, the battery positive lead was connected directly to the earthing terminal of the condenser, the arrangement being otherwise standard. After 40 hours running, during which there was considerable sparking at the contacts and (Cont'd) Signed This Sheet must be filed on completion of the work. | ||