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).
Patent claims for an internal combustion engine design, specifically concerning the piston and combustion chamber.
| Identifier | ExFiles\Box 147\2\ scan0183 | |
| Date | 20th January 1940 guessed | |
| masking effect is maintained during the initial stage of the movement of the piston from top dead centre. Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is :- 1. An internal combustion engine with a cylinder of the said type and with a protuberance on the piston crown , which at top dead centre lies within the combustion chamber and masks the mixturelying in the space between other parts of the piston crown and the said projecting portions of the cylinder head from the mixture in the combustion chamber. 2. An internal combustion engine as claimed in Claim No. 1 in which the walls of the combustion chamber where these spring from the said projecting portions of the head and the walls of the said protuberance adjacent to such last mentioned walls are both normal or sub- stantially normal to the said projecting portions of the head. 3. An internal combustion engine as claimed in Claim 2 8. | ||