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 material test using a trembler coil apparatus, with temperature varied and results recorded at 20° intervals.
| Identifier | ExFiles\Box 39\3\ Scan308 | |
| Date | 1st December 1924 | |
| RR 238 (150 BKS.) 109 461-B 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To___________________________19__ Order No._________________ Customer's No. 2 with the trembler coil apparatus, the test pieces being in the oven, a flat plate below and a cylindrical block of 1 3/4" dia. above, forming the electrodes. For each piece the temperature was gradually raised to 100°C and then lowered again whilst readings were taken at 20° intervals. The results are expressed in micro-mhos per mil thickness of the material for the particular electrodes used. The last sample broke down when taking the second 80° reading. Signed_________________ (Cont-d) This Sheet must be filed on completion of the work. | ||