Patent specification for a sparking plug, noting the design has been abandoned.
| Identifier | ExFiles\Box 162\3\ img168 | |
| Date | 19th February 1940 | |
| Elec. 6000 To NW. {N. Walker - Patents} Rm {William Robotham - Chief Engineer} /RC. {R. Childs} 9/ML.19.2.40. re Patent Specification for Sparking Plug. Herewith Photostat of specification No: 16256/39. also copy of 500148 which you kindly obtained for our perusal. We find that this scheme has been abandoned by at least one firm for an improved scheme employing a special compensating washer. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} | ||
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).