A Simple and Effective Silencer.
Page 62
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A LTHOUGH it is a component that is often very much out of sight, the silencer is one which the designer and riser cannot afford cad to have out of mind. It must obviously be efficient in quietening the exhaust note and, at the same time, there must he no appreciable backpressure within the speed range of the engine to which it is fitted. These two important points, together with others, have been taken into consideration, when designing the Priceless patent silencer, the maker of which is Thos. Price, Ltd., Barnwell Works, Blake Street, Bolton. The shell of this silencer resembles that of the majority of other designs, but the interior baffles differ very widely from the flat-plate-type generally employed. The exhaust gases coming from the engine first impinge upon a cone with holes around its base; this is styled a cutting cone. Next is a suction cone; this has no holes at the base but the point is cut off, which causes the gases passing through the, orifice to exert an extractor effect upon those passing through the previous cutting cone. The other cones in the silencer are arranged in the same order, that is, a cutting cone and suction cone alternately. The gas flow is kept steady and there are no small orifices to become choked with carbon. We are told that this design of silencer is fitted to many Garner, Guy and Halley vehicles.