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 Michigan Tool Company regarding gear design and thread spacing.
| Identifier | ExFiles\Box 85\3\ scan0031 | |
| Date | 2nd November 1934 | |
| MICHIGAN TOOL COMPANY Rolls-Royce Ltd. -2- November 2, 1934. connection with securing accurate thread spacing. This condition is accentuated when the ratio is an even one and consequently, we have wherever possible, used a hunting tooth design in order that the gears may be self-indexing. We have ample experience to demonstrate the quite operation, long life and high efficiency of the Cone type gear. We would like to secure your further comment, however, before proceeding further with the matter. Thanking you for your inquiry, we are Yours very truly, MICHIGAN TOOL CO. J.{Mr Johnson W.M.} C. Drader, Chief Engineer. GRS:B. C:Marbaix. | ||