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).
Inspection of returned sparking plugs and clarification on dimensional tolerances.
| Identifier | ExFiles\Box 79\1\ scan0143 | |
| Date | 30th September 1918 | |
| X 601 Mr. Hives. 30.9.18. Wd{Mr Wood/Mr Whitehead}/EM1/E30918. We attach herewith a letter we have received from, Messrs. The Lodge Sparking Plug Co. Ltd. re Sparking Plugs and in reply to a number of Plugs we have returned to them. We also send you herewith a box containing 12 plugs which have been returned for our inspection. Will you please have the plugs inspected and report as to whether electrodes project more than 1/64th. beyond the diaphragm. These particulars are what, I believe, you have previously agreed to. At the same time we should be glad to know what plus limit we should give to this dimension so that we may instruct the Inspectors and also have a gauge made. Also let us know how much below the diaphragm they may be. | ||