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).
Letter from Lodge Sparking Plug Co. Ltd. regarding the inspection tolerance for plug projection.
| Identifier | ExFiles\Box 79\1\ scan0145 | |
| Date | 26th September 1918 | |
| Page 2. L.S.P.Co. Ltd. Date 26/9/18. extremely strict about this projecting point, but we agreed between us that the projection should not exceed 1/64", as this was the dimension that we could work to conveniently. Every plug, before it goes to you, is guaged here, and you will quite understand that when the projection measures 1/64", the plug might be passed by our testers and rejected by yours. Would you therefore kind instruct your inspectors not to reject plugs in which the projection measures 1/64"? Trusting this meets with your approval, We beg to remain, Yours faithfully, THE LODGE SPARKING PLUG CO. LTD. Alex M Lodge DIRECTOR Enc. (Advice Note). ENCLOSURE Nº 817 | ||