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).
Design details for a gear wheel, pin connections, and bonnet fasteners, referencing associated sketches.
| Identifier | ExFiles\Box 25\1\ Scan100 | |
| Date | 6th January 1927 guessed | |
| contd :- -2- SEE ORIGINAL FOR SKETCHES - figs. 4 and 5. In designing the details I think face control if possible is better, otherwise pin has to be strong cantilever. Clearance should be arranged where-ever possible without decreasing the efficiency, and these should be ample. The gear wheel has a large dia. boss. 2 cuts are milled for ends of sliders; afterwards plain holes are bored for headless pins, which are just pushed in, and the whole runs between faces which prevent these pins coming out. Centre pin may be slightly shouldered but features of the bonnet may imprison this in the same way. I am anxiously awaiting the report of a trial of the new bonnet fasteners because this is simple when one realises that it should effectively pull in the bonnet as well as hold it down. Naturally a pin can be used instead of hook or lip shewn in fig.3. This would be more like a small edition of the spring pot shewn in fig.4. In all cases ample clearance is needed (vertically). A pin was my first idea. I send you most of my thoughts but I hope you will do something better. You will see I have avoided some of the less robust construction. SKETCHES. R.{Sir Henry Royce} | ||