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 electrical leakage on a coated coil-case placed in a heated silica oven.
| Identifier | ExFiles\Box 45\4\ Scan303 | |
| Date | 29th June 1920 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 2. coating on the inside surface of the coil-case under test. The other side of the transformer supply was connected to a tin-foil coating on the outside of the coil-case. The case was placed inside a silica oven, electrically heated and provided with a thermometer. Thus on applying the a.c. voltage from the transformer, any leakage in the material under test, was allowed to pass in one direction only by the valve and show on the d.c. instrument. The tests were made by placing (Cont'd) Signed This Sheet must be filed on completion of the work. | ||