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).
On the difficulties and experiments in manufacturing condensers, focusing on sourcing and testing suitable insulating paper.
| Identifier | WestWitteringFiles\H\November1921\ Scan26 | |
| Date | 16th November 1921 | |
| To R.{Sir Henry Royce} from EPC. c.c. to CJ. c.c. to Da.{Bernard Day - Chassis Design} c.c. to Hy.{Tom Haldenby - Plant Engineer} c.c. to Nor. c.c. to Wd.{Mr Wood/Mr Whitehead} ORIGINAL. EFC1/T16.11.21. X.2612 - CONDENSERS. We are doing all we can on condensers as a result of instructions contained in your note Rl/GS1121, but there are certain difficulties, especially on a production basis. We are, for instance, endeavouring to obtain twin paper similar to that used by the American Bosch Co. in their condenser production, which has a combined thickness of .00125". Up to the present, all enquiries for this material in England have only produced offers of single paper, and this only in quantities far too large for experimental purposes. It is possible that condensers might be made with the single paper, though our attempts to make such condensers from paper of quality which we use for insulating the secondaries of the coils have not shown much promise though we are still experimenting. When this paper which is .0015" thick, is subjected to voltage tests, it/almost always possible to find weak points which would be fatal in condensers. The attempts so far have consisted in building up the condenser in plates, as in the case of mica, but we are attempting to make a rolled condenser with strips of this material and with strips of foil of maximum possible length obtainable, which overlap one another at the ends. (upside down text at bottom) R.R. 335A (100 T) (S.E. 798, 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 | ||