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).
Test results and observations on the electrical breakdown of various materials.
| Identifier | ExFiles\Box 24\2\ Scan230 | |
| Date | 26th January 1923 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: E.F.C. Date: Jan 26th 1923 Order No: P.B. 76 (3) Customer's No. X.1109 X.3515 Table Data: 5. Bakelite .044 151.0 100.0 15,100 343 6. Continental " Bakelite .025 124.0 25.0 3,100 124 * 7. Continental " Bakelite .047 146.0 75.0 10,930 233 8. Bakelite .148 179.0 100.0 17,900 121 Handwritten Notes: With the exception of samples 1, 2, & 6, the puncture of the material was accompanied by a distinct snap. In the case of No. 1 (paper) the breakdown took place immediately on the lowest voltage obtainable. The lamps not even lighting up. With No. 2 there was no noise, the breakdown being notified by lamps and voltmeter only. XX No. 6 was not a clear breakdown, a small arc being struck through one of the cracks on a voltage of 3,100. cont'd.{John DeLooze - Company Secretary} Signed This Sheet must be filed on completion of the work. | ||