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).
Summary of patents for piston-sealing means and aircraft engine cowlings.
| Identifier | ExFiles\Box 147\4\ scan0046 | |
| Date | 15th August 1940 guessed | |
| No. Patentee Title 523,723 Lockwood & Carlisle Ltd. Piston-sealing means and J.{Mr Johnson W.M.} H.{Arthur M. Hanbury - Head Complaints} Carlisle for internal combustion engines Sealing piston rings are formed as an assembly of rings alternatively expansible and non- expansible arranged in a single slot and urged against the upper or lower side of the slot by separate resilient means. 523,724 P. Eberspacher and A.{Mr Adams} Cowlings for air-cooled Eberspacher aircraft engines A cowling ring shaped as a NACA cowling is formed of an inner and outer portion separated by a gap on the outside just behind the lead- ing edge. Air entering the cowling flows back between these two portions and out of the gap. Around the gap is another cowling shaped as a Townsend ring of very small chord. ------------------- | ||