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).
Instructions for a temperature test of paper condensers treated with paraffin wax.
| Identifier | ExFiles\Box 52\3\ Scan182 | |
| Date | 18th July 1924 | |
| RR 238 (100 BKS) (SH57. 29-6-20.) MP 224388 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E E C Order No. PC 74 Customer's No. X 4430 Temperature Test of Paper Condensers. Treated with Paraffin Wax. Seven paper dielectric condensers, treated in various ways, but chiefly with paraffin wax, have been tested in a similar manner to the varnished paper condensers. The condensers were tested in two groups of four and three respectively, details of them being as follows:- Group 1. No 1312. Made up with untreated white paper, and the whole impregnated with commercial paraffin wax. No 1576. Made up with untreated white paper and impregnated with paraffin wax of melting point 140 F. {Mr Friese} No 1590. Standard condenser (but not baked) impregnated with commercial cont'd Signed This Sheet must be filed on completion of the work. | ||