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 testing the properties of various insulation materials like ebonite, vulcanite, and porcelain.
| Identifier | ExFiles\Box 24\2\ Scan052 | |
| Date | 24th January 1919 | |
| R.R. 300 (120B) (SF 349 24-1-19) MP 200552 88228 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 19 To Order No. Customer's No. Re Insulation Testing (cont'd). II Block, includes ebonite, vulcanite and various fibres & proprietary moulded compositions. Also, steatite porcelain &c. (a) Moulded material. (1) Observe finish, whether friction or lacquer. Test mechanical properties, break, drill, cut &c. (2) Heat in oven until change occurs, observe whether softening, cracking, warping &c and temp. Note any permanent effects. (3) Heat moderately & test breakdown. (cont'd) Signed This Sheet must be filed on completion of the work. | ||