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).
Alternative materials, like aluminium foil and oiled silk, for use in condensers.
| Identifier | Morton\M1.5\ img007 | |
| Date | 16th January 1921 | |
| Contd. -2- EFC2/T6.1.21. require to be made up into a form suitable for fitting in the distributor. We are specifying aluminium foil as an alternative to tin foil. We are sending you also a sample of oiled silk of .002" thickness, obtained from The Ioco Rubber & Waterproofing Company Ltd., and this, alternatively with the .002" paper, sample of which we have already stated that we are sending you, is proposed as dielectric for the condensers of the dimensions called for in your recent advance print. It is claimed that this material (oiled silk) has a dielectric strength of 2,000 volts, i.e. 1,000 volts per mil. The ready interleaved ribbon which we propose obtaining for the purpose will have this material as its dielectric. We do not think we have yet reported to you the fact that the foil in the U.S.A. Bosch condenser is aluminium. EFC. | ||