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).
Letter discussing the challenges of welding Tungsten and returning unused rods and contacts to suppliers.
| Identifier | ExFiles\Box 35\5\ scan 156 | |
| Date | 22th November 1920 | |
| Contd. -2- EFC4/T22.11.20. On looking back over the correspondence in this matter, we notice that some time ago, you stated that the method was to braze a small cheese of Tungsten into a soft iron rivet, whereas now you mention welding as being the only possible method. Mr. Weston was of the opinion that brazing was of no use, and that the only possible method was the welding, If this is the case, then this would perhaps be an explanation of our unsatisfactory results, as we have never yet, so far as we know, tried any Tungsten rivets which have been properly welded in an atmosphere of hydrogen. The Tungsten Manufacturing Co. will, however, carry out such work on the six blades and screws which we have now handed to them and will return these to us in about a week's time for trial. Mr. Weston was of the opinion that the purest possible Tungsten is the best possible material and that the Crecium alloy was only a name given to Tungsten which was less pure. Regarding the rods receivedfrom the Fansteel Co. last winter, we have been unable to use these for contact points, but we are using the long rods .093" dia. by 6" long for distributor sparking points. Therefore, we are returning only what we have left of the rods of .069" dia. (3) and .160" dia. (3), which we cannot use for any purpose. Regarding the contacts and rods from the Independent Lamp & Wire Co. we are returning one rod .109" dia. by 3.00" long, but we still have contacts for Bosch magneto, which will now be tried out. All the Tungsten tacks have been used. Contd | ||