Improvements in Exhaust Silencers for Internal Combustion Engines and the like.
Year: 1899

page_text: Improvements in Exhaust Silencers for Internal Combustion Engines
and the like.
I, ARTHUR FREDERICK EVANS, of 11, Brunswick Walk, Cambridge, Engineer,
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
following statement:―
This invention relates to improvements in exhaust silencers for internal com-
bustion engines and the like, and has for its object the provision of an apparatus
for reducing the effects of the intermittent escape of exhaust gases after explosion
in the engine cylinder.
In order to carry out this invention I provide two vessels or chambers of any
size and shape and material as may be convenient. I prefer however to make
the chambers cylindrical in form, and both having the same diameter, the
upper chamber being about 4 times the length of the other chamber.
The outer end of each chamber is closed by a flanged cover plate. Between
the two cylindrical chambers is a perforated plate, and over this perforated plate
is fixed a funnel tapering towards the larger chamber.
A smaller pipe is provided leading through the middle of the smaller cylindrical
chamber and the perforated plate into the funnel aforesaid. This pipe is con-
nected with the exhaust pipe of the engine. Another similar pipe is provided
and led out of the side of the smaller cylindrical chamber for conveying the
reduced or modified spent gas after passing through the apparatus.
In order that this invention may be readily understood reference is made to
the accompanying drawings in which Fig. 1 represents an elevation, partly in
section, of the apparatus, Fig. 2 is a plan of the perforated plate, Fig. 3 a section
plan of the smaller chamber and outlet pipe.
In these several views A is the larger chamber, termed the "buffer" chamber,
B the smaller or outlet-chamber, C the injector funnel, D the perforated division
plate with perforations E, G the discharge pipe leading from the engine cylinder
to the cone of the funnel and H is the outlet pipe, which if preferred may be
provided with a grating J. The chamber B can be filled with coke or other
material (as shewn at K) in order to scour or deodorise the issuing products from
the engine.
The action of this improved apparatus is as follows:-A spent charge issuing
from the cylinder enters the chamber A and increases the pressure therein but
is prevented from escaping from the same until the incoming gases have
5 diminished in velocity sufficient for the gases in it to overcome the injection
action of the funnel C, when they will eventually escape to the atmosphere
through the chamber B and the pipe H.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
0 I claim is:-
1
The provision of an apparatus for silencing the escape of exhaust gases from

page_text: internal combustion engines substantially as and for the purpose herein set
forth and described and illustrated by the accompanying drawings.
2. The application of this invention to any form or kind of internal combus-
tion engine and like machines where it is desirable to silence the escape of the
exhaust from the engine or machine substantially as and for the purpose herein
set forth and described and illustrated by the accompanying drawings.
Dated this 24th day of November 1899.
REGINALD W. BARKER,
Applicant's Agent,. 56, Ludgate Hill, London, E.C.