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 from Bridgehead Ltd. regarding the performance results and patent status of a new silencer design.
| Identifier | ExFiles\Box 79\2\ scan0098 | |
| Date | 9th February 1921 | |
| R.R. 235A (100 T) (S.H. 159 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 Copy for EFC. X.3382 (filed 9-2-21) BRIDGEHEAD LTD. Engineers, Bankhey Works, BLACKPOOL, Your Ref:- DA{Bernard Day - Chassis Design}19/CB21-1-21. Our Ref:- MG/GF. Dear Sirs, Mr Anderson has forwarded us your letter of January 21st. in reply we would say that the results we have obtained up to the present have held us back from putting the article on to market, and therefore we do not think you are likely to come across one of these silencers. Practical observations have shown increased acceleration and increased power, but we believe that finally these results will be regarded as a side issue, we may say that we have taken out further protections with regard to the patent and we are convinced that the exhaust gases will ultimately be used to control temperature of cylinder Yours faithfully, BRIDGEHEAD LTD. (sgd) M.Gill. Messrs, Rolls-Royce Ltd. Nightingale Road. D E R B Y. | ||