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 AC-Sphinx Sparking Plug Co. Ltd. concerning speedometer work and Sinterkorund spark plug development.
| Identifier | ExFiles\Box 165\2\ img076 | |
| Date | 30th April 1937 | |
| 6071 AC-SPHINX SPARKING PLUG CO. LTD. DIRECTORS: N.F. Stockbridge, W.O.Kennington, C.J.Bartlett. Telegrams: SPHINX. DUNSTABLE. DUNSTABLE, BEDS. ENGLAND. Telephone: DUNSTABLE 360. Our Ref. NFS/GEB. Your Ref. Rm{William Robotham - Chief Engineer}/Wst.19/AP. 30th April, 1937. Messrs. Rolls-Royce Limited, Derby. For the Attention of Mr. H.E. West. Dear Mr. West, Many thanks for your letter of the 29th instant. We will hold up work on the Rolls-Royce Speedometer instrument until we hear from you on the Bentley jobs. With regard to the Sinterkorund Plug position, we are busily working on some alternative designs in the matter of electrode shapes etc., and the development seems very promising. As soon as we are sufficiently far forward and I think any useful purpose would be served, I will try and let you have a set of plugs for test. Would you agree to test these further samples on single cylinder units (in which case I will send you two or three plugs); or do you want these further tests to take place on a multi-cylinder engine, and if so, what is the minimum number of plugs you would require? Yours faithfully, N.F. STOCKBRIDGE, Managing Director. AC Air Cleaners . AC Clocks . AC Fuel Pumps . AC Oil Filters . AC Oil Gauges . AC Plugs . AC Speedometers . AC Windscreen Wipers. | ||