The incorporation of cast iron ends with knife-edged valve seats into shock absorbers.
| Identifier | ExFiles\Box 56\1\ Scan103 | |
| Date | 24th March 1931 | |
| K235. To RHC. {R. H. Coverley - Production Engineer} From Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 7/MJ.24.3.31. X7520. Further to Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 3/KT.23.3.31. We wish to incorporate in these shock absorbers cast iron ends carrying the valves having knife-edged seats. You will recollect we instructed four of these in our Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 2/MJ.12.2.31., to our drawing Hs. {Lord Ernest Hives - Chair} 322. Will you please make half a dozen sets of these ends to go with the pieces mentioned. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).