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).
Tests and pricing of iridio-platinum contact points with a reduced platinum content.
| Identifier | WestWitteringFiles\G\September1921\ Scan56 | |
| Date | 14th September 1921 | |
| R.R. 285A (100 T) (S.H. 159, 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 ORIGINAL To R & E.{Mr Elliott - Chief Engineer} from EFC. EFC4/T14.9.21. c. CJ. & PN.{Mr Northey} c. Ey. & Da.{Bernard Day - Chassis Design} c. Rg.{Mr Rowledge} & EP.{G. Eric Platford - Chief Quality Engineer} c. R.R. of America Inc. X.3656 - IRIDIO-PLATINUM CONTACT POINTS WITH A MUCH SMALLER AMOUNT OF PLATINUM THAN STANDARD. Please find attached copy of my assistant's report on some bench tests of iridio-platinum contact points containing a much smaller quantity of platinum than our standard. It is considered that the result of this test is sufficiently satisfactory to warrant putting a pair of these points on one of the experimental cars, which we shall accordingly do. The prices we now pay for standard platinum points are 14/- +12/8 = £1.6.8; cost of fitting, 4½d.{John DeLooze - Company Secretary} The prices quoted for these points, which are of 25% iridio platinum welded to steel studs, are 12/- per pair, or 11/6 per pair in a hundred pair lots. A contact blade and screw fitted with these points by Messrs. W.H. Reynold & Co. Key Hill Drive, Birmingham, were taken to Mr. Royce by Mr. Hives on 14.6.21. Apparently it is generally considered that iridio-platinum gives better service than plain platinum for contact points. The matter of this iridio-platinum was first brought to our notice by Messrs. North & Sons, the contacts for whose magnetos ared done in this way by Messrs. Reynolds. EFC. | ||