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).
Specifications for insulation testing apparatus including an electrode, test plate, feeler, and oven.
| Identifier | ExFiles\Box 24\2\ Scan056 | |
| Date | 24th January 1919 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 88232 To Order No Customer's No. Re: Apparatus for Insulation Testing (Cont'd) earthed electrode of the stand. This can be 6 or 8 inches long. ③ Test-plate and feeler! Comprising a flat circular plate of about 6" dia rounded at the edges & with recess for earthing. Also a flexible metal strip (say of steel about 10 thou thick) mounted on a reliable insulating handle, for exploring sheet insulation. ④ Oven of about 18" to 2ft cubed, ventilated top and bottom and well lagged with asbestos. Capable of raising the temperature inside to at-least 150°C by means of heating element situated at the bottom. This preferably electric, but alternatively (Cont'd) Signed This Sheet must be filed on completion of the work. | ||