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).
Report discussing gearbox designs, helical gears, the Salerni coupling, and potential patents.
| Identifier | ExFiles\Box 6\4\ 04-page222 | |
| Date | 11th June 1929 guessed | |
| -3- contd. In conjunction with this scheme the 3rd. speed would probably be single or double helical gears, and the engagement be made by a jaw clutch. As far as we can see this combination would make both a silent third, and easily engaged 3rd, 2nd, and top, and an independent 1st and reverse. It would utilise some of the space between the gears for the Salerni coupling, but the servo drive would have to be put behind the gearbox proper. In conclusion, these two devices are hopeful and promising to solve the gearbox difficulties. They should be covered by patents as far as possible. There is another point in connection with the Salerni coupling, and that is, as we are helping Mr.Salerni by pointing out the imperfections of his scheme, and promising to test a combination which he thinks best, and also in view of the great help it would be to him commercially for us to adopt his coupling, he has very kindly consented to our using it on our English made cars free of royalty should we decide to adopt it. I think an agreement should be drawn up regarding this point. Naturally I have not mentioned the 101 schemes that have been schemed and suggested by ourselves and others, but which have been set aside for the above. Which we consider the best of the attempts to overcome this long standing deficiency. R.{Sir Henry Royce} | ||