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 to Geo. Salter & Co. Ltd. requesting a sample of 6 special helical compression springs.
| Identifier | ExFiles\Box 153\1\ scan0132 | |
| Date | 1st April 1938 | |
| c. Roy.{Sir Henry Royce} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}5/MH.{M. Huckerby} 1300 1st. April 1938. Messrs. Geo. Salter & Co. Ltd., WEST BROMWICH. Dear Sirs, We are urgently in need of some helical compression springs similar to our FW.1570 which you are now supplying to our Production dept. but with a free length of 1.530 ± 0.010 instead of 1.990. as shown on our drawing. We intend to use these springs so that they act as stops when choc-a-bloc. We have fully compressed one of your springs to our FW.1570 and find that its choc-a-bloc length is 1.250 We require the choc-a-bloc length of the special springs to be between 1.250 and 1.240. The ends should be ground square. Will you please send us as soon as possible 6 springs to these particulars. An official order will follow. Will you please let us know whether you can supply springs on a production basis with the choc-a-bloc length to a 0.010 limit. The free length is of less importance and we have specified the wide limit of ±0.010 to assist you as far as possible. Yours faithfully, for ROLLS-ROYCE LTD. | ||