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 an investigation into failures of tungsten contact points for battery ignition systems.
| Identifier | ExFiles\Box 35\6\ scan 424 | |
| Date | 15th May 1928 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C. Order No.: WC105 Customer's No.: X2894 Date: 15 - 5 - 1928 Tungsten contact points for Battery Ignition. Owing to a number of failures occurring on production due to the tungsten rivet becoming loose we have been handed a number of battery ignition contact breaker levers as follows:- ① Ten levers with points spun into position by the Tungsten Manufacturing Co. ② Three levers made up by R.H.C. also [strikethrough]with points spun in by[/strikethrough] the T.M.Co. ③ Three levers with points by the L.P.S. Electrical Co. rivetted in position by RHC{R. H. Coverley - Production Engineer}'s dept. ④ Three levers with the tungsten rivets merely soldered into position. Signed: contd This Sheet must be filed on completion of the work. | ||