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).
The patented design and performance benefits of the St. Jacques Silencer.
| Identifier | ExFiles\Box 152\3\ scan0161 | |
| Date | 4th May 1934 guessed | |
| THE ST. {Capt. P. R. Strong} JACQUES. SILENCER. INTERNATIONAL CORPORATION LTD. 3, Grosvenor Gardens; London, S.W.1. Phone VICtoria 0926. Patent protection covers :- Silencer into which the exhaust gases are admitted tangentially, and take therein a gyratory and gradually accelerating motion, the silencer being cylindrical with a cone-shaped end. It also covers an internal cone to accelerate the gases; bladed rings to direct the gases tangentially and towards the centre; internal pipe to permit exhaust gases to escape in both directions; exhaust manifold into which the exhaust gases from the engine enter tangentially thus receiving a gyratory motion, and bladed rings to accelerate the gyratory motion; silencer body made of two metals having different vibrational frequencies. Fitting this silencer gives 15% to 25% greater acceleration of the engine, and greater power, while the temperature of the silencer is 25% lower, as compared with standard silencers. | ||