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 tests of insulating papers and enclosing related diagrams and specifications.
| Identifier | ExFiles\Box 61\1\ scan0178 | |
| Date | 11th March 1931 | |
| X6110. EFCA/AD 11th March, 1931. Mr. Symons, Messrs. H.D. Symons & Co.Ltd., Kingston Hill, Surrey. Dear Sir, H.T. D.C. Tests of Insulating Papers or other Insulation. During your visit to our premises a short while ago you had a conversation with the undersigned's assistant Mr. H.E.West on the subject of high pressure leakage tests of insulating papers etc. during which conversation Mr.West showed to you and explained the working of our own apparatus which we use for this purpose. It was further arranged that we would send you general particulars of the arrangement of this apparatus. Accordingly we enclose the following (1) Blue print diagram of connections etc. (2) Blue print diagram of H.T. valve rectifying unit (forming a component portion of (1) ) and (3) Specification of rectifying valve for H.T. D.C. insulating testing or ball gap voltage measurement. | ||