Improvements in Apparatus for Reducing the Noise of the Exhaust of Internal Combustion Engines,
Year: 1898

page_text: Improvements in Apparatus for Reducing the Noise of the Exhaust of
Internal Combustion Engines,
We, WILLIAM JOHN CROSSLEY, of Crossley Brothers Limited, Openshaw, Man-
chester, and JAMES ATKINSON, of The Woodlands, Marple, Cheshire, Engineers,
do hereby declare the nature of this invention to be as follows:-
The exhaust gases from internal combustion engines frequently make con-
siderable noise and the means usually taken to reduce this noise, if efficient in
so doing, commonly cause back pressure on the engine which interferes to some
extent with its satisfactory working. Our invention is for an improved means
of reducing this noise, without interfering to such an extent with the free outlet
of the exhaust.
We construct our improved silencer in the following manner:-
The exhaust pipe at any desired distance from the engine passes into a circular
casting forming a base for the silencer. On this base is placed a section consist-
ing of a circular casting the lower part of which is partially closed in by a more
or less pendent bottoni having a hole in its centre say twice the area of the
exhaust pipe, or preferably larger. The pendent bottom dips slightly below the
upper edge of a saucer shaped casting larger in diameter than the hole in the
pendent bottom. The saucer shaped casting may be suspended below the pendent
bottom and held up to it by bolts.
A second section may be placed on the top of the first section, and as many
more as may be required to give the desired amount of quietness to the exhaust.
Finally a plain cover with an enlarged outlet pipe is placed on the top. In
some instances the top cover may be specially formed to prevent water being
blown out with the exhaust.
In action the exhaust passes round the outer edge of the saucer shaped casting
of the lowest section, then inwards and upwards through the hole in its pendent
bottom and so on through all the sections till it finally passes out at the top.
This action alone has considerable effect in reducing the noise of the exhaust, but
to obtain the best result the saucer shaped castings are kept partly filled with
water, some of this water may pass away as steam.
Dated this 21st day of December 1898.
Improvements in Apparatus for Reducing the Noise of the Exhaust of
Internal Combustion Engines.
We, WILLIAM JOHN CROSSLEY, of Crossley Brothers, Limited, Openshaw, Man-
chester, and JAMES ATKINSON, of The Woodlands, Marple, Cheshire, Engineers,
[Price 8d.1

page_text: do hereby declare the nature of this invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the fol-
lowing statement:-
The exhaust gases from internal combustion engines frequently make con-
siderable noise and the means usually taken to reduce this noise, if efficient in
so doing, commonly cause back pressure on the engine which interferes to some
extent with its satisfactory working. Our invention is for an improved means
of reducing this noise, without interfering to such an extent with the free outlet
of the exhaust.
To enable the construction of our improved silencer to be clearly understood
we append a sheet of drawings in which Fig. 1 is a vertical section through the
silencer and Fig. 2 is a plan.
The exhaust pipe at any desired distance from the engine passes into a circular
casting A forming a base for the silencer. On this base is placed a section con-
sisting of a circular casting B the lower part of which is partially closed in by
a more or less pendent bottom C having a hole in its centre say twice the area
of the exhaust pipe, or preferably larger. The pendent bottom C dips slightly
below the upper edge of a saucer shaped casting D larger in diameter than the
hole in the pendent bottom C. The saucer shaped casting D may be suspended
below the pendent bottom C and held up to it by bolts as shown.
A second section may be placed on the top of the first section, and as many
more as may be required to give the desired amount of quietness to the exhaust.
Finally a plain cover E with an enlarged outlet pipe is placed on the top.
In some instances the top cover may be specially formed to prevent water being
blown out with the exhaust, as shown.
In action the exhaust passes round the outer edge of the saucer shaped casting 1)
of the lowest section, then inwards and upwards through the hole in its pendent
bottom C and so on through all the sections till it finally passes out at the top.
This action alone has considerable effect in reducing the noise of the exhaust,
but to obtain the best result the saucer shaped castings are kept partly filled with
water, some of this water may pass away as steam.
In some instances the top of the silencer may be left open without the cover E
or enlarged outlet pipe F.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
-
1. The general arrangement and construction of exhaust quieteners for internal
combustion motors consisting of any desired number of sections placed one above
the other and having a suitable base a section being the saucer shaped casting D
placed below the circular casting B with its pendent bottom C as described and
illustrated.
1
100
1
1000