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).
Newspaper clipping detailing a pinned piston ring design and a custom wire tool for removal.
| Identifier | ExFiles\Box 16\1\ Scan123 | |
| Date | 21th September 1912 | |
| R.R. 235a (150 H) (S.A. 501. 19-2-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0850. [Newspaper Clipping] The Autocar. 347 PISTON RINGS. 21st Sept. 1912 [18599.]—I enclose sketch (fig. 1) of another type of ring than those referred to in Mr. Simpson's article of September 7th (p. 437), which, after many years' experience, I consider much better than any other. Fig. 1. PIN 1/8" DIA. The pins fitted in the piston not only prevent the rings turning, but help to prevent loss of compression. The rings can also be very easily removed by means of wire pliers bent as shown in fig. 2, thereby avoiding risk of breakage and saving much time and annoyance. Fig. 2. STEEL WIRE Another point of interest is the clearance necessary at the butt ends to avoid loss of compression on the one hand and risk of seizing on the other. An excellent rule is to allow .001 for every inch in diameter of the piston. A.{Mr Adams} ALBRECHT. [Handwritten Note] CNH1. [Watermark] DICKINSON & SONS 1804 MADE AT CROXLEY | ||