Improvements in Exhaust Silencers and the like.
Year: 1895

page_text: Date of Application, 6th Feb., 1895_
Complete Specification Left, 30th Oct., 1895-Accepted, 30th Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in Exhaust Silencers and the like.
FELIX HAYES Mr. G. Lewis's Corn Mills Runcorn, Cheshire Expert Miller
and Milling Engineer. .I do hereby declare the nature of this invention to be
as follows:-
This invention relates to explosive engines, viz. gas engines and oil engines it is
also applicable to safety valves of engines (steam) where free vent and a supression
of noise are desirable.
This invention almost entirely supresses the obnoxious noise produced by each
explosion from the exhaust pipe of gas and oil engines. It also provides a free and
necessary outlet for the exploded gas & air.
The construction of this invention (apparatus) is as follows. A horizontal disc
is placed round exhaust pipe of the explosive engine (gas or oil) or round the safety
valve exhaust pipe of a steam engine.
Next to the exhaust pipe a number of vertical brass wires are arranged preferably
forming a circle, these interfere to such an extent with the sound waves as to
localise the metalic noise.
Above and in the centre of this circle of vertical wires a cone is affixed point
downwards and having a number of curved blades at its upper and wider end the
point of this cone splits the blast from the exhaust pipe of engine and the curved
blades or guide blades at the top give the air a rotary notion round a vertical
cylinder and cause a larger number of vibrations each very weak.
The air now revolves until it reaches the bottom of the innermost cylinder which
is suspended six inches above the bottom of the apparatus, where it encounters
more guide blades formed by vertical cuts being made at intervals in the bottom of
the afore mentioned cylinder (sheet iron) and the strips between the cuts being
twisted in such a way as to cause a further rotary action of the air-which ascends
to the top of the next cylinder which is affixed on the bottom of the apparatus and
is six inches from the top of the apparatus.
At the top of this cylinder it encounters more guide blades and then continues
to revolve round the last and outer cylinder till it reaches a free outlet at the
bottom.
A spring safety valve is arranged above the cone in the centre of the top of the
apparatus to prevent damage to apparatus in cases of violent explosions causet
usually through neglect in starting gas engines.
The inner and outer surfaces of the three cylinders, excepting the outside of the
onter cylinder and the outside of the top and bottom of the apparatus are coated
with a heat resisting cement which is sprinkled with sand before setting hard,
which prevents any reflection of the sound.
It condenses the moisture in cold weather.
This apparatus is giving great satisfaction on the exhaust pipe of a 12 h.p. gas
engine.
Dated this 5th day of February 1895.

page_text: Improvements in Exhaust Silencers and the like.
I, FELIX HAYES, late of Canal Roller Mills, Runcorn, Cheshire, now of
4 Pelham Street, Lincoln, 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 explosive engines, viz.: gas engines and oil engines, and
is also applicable to safety valves of engines (steam) where free vent and suppression
of noise are desirable.
This invention almost entirely suppresses the obnoxious noise produced by cach
explosion from the exhaust pipe of gas and oil engines, it also provides a free and
necessary outlet for the exploded gas and air.
The construction of this invention (apparatus) is represented in the annexed
drawings.
Figure 1 vertical section. Figure 2 section in plan through line a, b, of
Figure 1.
A horizontal disc A is placed round exhaust pipe B of explosive engine (gas or
oil) or round the safety valve exhaust pipe of a steam engine. Next to the
exhaust pipe B a number of nearly vertical brass wires C, C, are arranged
preferably forming a circle or open cone or wire cage, and these interfere to such
an extent with the sound waves as to localise the metallic noise. Above and in
the centre of this wire cage C, C, a cone D is affixed point downwards and having
a number of curved blades E, E, at its upper and wider end, the point of this cone
splits the blast from the exhaust pipe of engine, and the curved or guide blades E, E,
at the top give the air a rotary motion round within a vertical cylinder F and
cause a large number of vibrations each very weak; the air now revolves until it
reaches the bottom of the cylinder F which is suspended from the top G to within
about six inches above the bottom of the apparatus where it encounters more guide
blades H, H, formed by vertical cuts being made at intervals in the bottom of
said cylinder F, and the strips between the cuts being twisted in such a way as to
cause a further rotary action of the air which ascends to the top of the next cylinder I
which is affixed on the bottom A of the apparatus and extends to within about six
inches of the top G of the apparatus. At the top of this cylinder the air
encounters more guide blades J, J, and then continues to revolve round the last
and outer cylinder or casing K till it reaches a free outlet L at the bottom.
A spring safety valve may be arranged above the cone in the centre of the top
of the apparatus to prevent damage to apparatus in cases of violent explosions
caused usually through neglect in starting gas engines if such a valve is desired.
The inner and outer surfaces of the cylinders F, I, and the inside of the outer
casing K are preferably coated with a heat resisting cement which is sprinkled
with sand before setting hard to prevent any reflection of the sound. The cement
tends to condense moisture in cold weather.
The blades E, E, on the cone D may in some cases be dispensed with.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The construction of silencing apparatus in the manner described for
application to gas and oil exhaust pipes and to safety valve exhaust pipes of steam
engines.
2. The combination of two cylinders F, I, with blades H, J, wire cage C and
inverted cone D enclosed in outer casing A, G, K, the whole being connected to

page_text: an exhaust pipe to silence the noise of explosion of a gas or oil engine, or that of
the safety valve exhaust pipe of a steam engine as set forth and constructed
substantially as represented in the annexed drawings.
A
1
2008
H. GARDNER,
Patent Agent, 166 Fleet Street, London,
Agent for the said Felix Hayes.