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).
Letter concerning a patented scheme by Monier Grandjean Minguet to improve the vacuum on the Autovac system.
| Identifier | ExFiles\Box 40\4\ Scan023 | |
| Date | 1st June 1921 | |
| 2 M Pks (100 T) (S.H. 79a 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2948 x3579 Hs.{Lord Ernest Hives - Chair} from BY.{R.W. Bailey - Chief Engineer} BY8-P1.6.21. RE AUTOVAC SCHEME. I have just received from Monier Grandjean Minguet a letter, pointing out that they have patented a scheme which apparently consists in a special nipple, by which they claim to double the height of the vacuum on the Autovac system when this is at a minimum under running conditions. I gather from their remarks that the scheme in question would result in giving a reasonable vacuum when the car was running slowly on a steep hill. I am not, of course, accepting their assurances on their face value, but if R, is at all interested in Autovac systems at the moment, I possibly ought to obtain some further information. Kindly let me have any information you have at your disposal. BY, | ||