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).
Request to send an official order to Armstrong Patents Co. for a pair of zero clearance pistons and a sealing piece.
| Identifier | ExFiles\Box 152\2\ scan0218 | |
| Date | 6th July 1940 | |
| 12 98 I.E.S. from Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham} o.{Mr Oldham} G/JWA. Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham}3/JMS.6.7.40. Will you please send an official order to the Armstrong Patents Co. for a pair of zero clearance pistons and an .002" interference sealing piece to suit a D.A.S. 12 size damper. o/n.16628. Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham} | ||