An Improved Spark Extinguisher and Smoke Consumer.
Year: 1891

page_text: Date of Application, 13th Aug., 1891-Accented, 19th Sept., 1891
UUME 17 DICIFICATION.
An Improved Spark Extinguisher and Smoke Consumer.
We, DAVID ANDERSON of Fair View, Stawell, in the Colony of Victoria,
Gentleman, and JOHN NAYLOR of Dudley, Stawell, as aforesaid 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:-
Our invention is arranged in the smoke box of locomotive or portable engine
boilers or it is arranged in the smoke box or smoke chamber of any kind of boiler
or furnace where a supply of exhaust steam (by preference) is obtainable. It is
constructed as will be hereinafter explained.
The invention consists in the combination and arrangement in a smoke box or
smoke chamber as above stated above the flue or tube line of a horizontal grating
composed of small tubes or tubular bars having fine perforations on their upper
surface from which steam is emitted to extinguish the sparks. These tubes or
tubular bars are preferably arranged to radiate from a central exhaust or waste
steam pipe from an engine cylinder or other source. The perforated tubes or pipes
may be arranged otherwise than radial although we prefer that they are fed from
a central exhaust steam pipe.
The nozzle end of exhaust pipe we make preferably in a separate casting
enlarging it in diameter where the ends of perforated tubes or pipes are screwed
into it such enlargement of bore being of such a form as to cause the steam to be
led into the ends of tubes. Also to provide a blast when the engine is at rest we
connect a small steam pipe to the nozzle to act as a blower.
To assist in the consumption of smoke in locomotives we have a branch pipe that
springs from near the bottom end of exhaust pipe in smoke box and leading out
from its top to the atmosphere, such pipe is furnished with a stop valve in order
that the exhaust through it can be regulated to increase or decrease the blast or
current leaving the smoke box.
In order that our invention may be well understood we will describe it with
reference to the accompanying sheet of drawings,
Figs. 1, 2, and 3, of which shew how we adapt our invention to the smoke box
of a locomotive engine. A being the exhaust or blast pipe and B its nozzle or
upper end secured in position as shewn. C are tubes or pipes screwed into holes
in nozzle and having their upper surface perforated and their outer ends closed.
Nozzle B has a downwardly projecting lip that forms the inner rim of an annular
channel to lead the steam into the pipes or tubes C. D is the blower pipe for
feeding exhaust pipe with steam when the engine is at rest. E is the branch pipe
leading from the exhaust and E' its stop valve.
Fig. 4 shews the form of nozzle we employ in the smoke box of a portable
engine or other smoke box or chamber when a vertical exhaust pipe is not standing
therein. A again being the exhaust, B the nozzle, its inner lip and bannular
channel C perforated tubes and D the blower pipe.
The mode of operation of our invention is as follows:-The unconsumed
particles of fuel or sparks enter the smoke box under our perforated tubular
grating and then ascend by reason of the draught when before reaching the funnel
they have to pass through the upwardly sprayed steam mist issuing from per-
forations of pipes C and consequently the sparks are immediately extinguished.
Also in locomotives by employing a branch exhaust pipe E when the engine is
worked with a high pressure of steam and the exhaust therefrom produces a blast
that is too powerful to allow the smaller particles of fuel to be thoroughly consumed
before leaving the tubes and smoke box then at such times the valve E is opened

page_text: to the desired extent to allow a portion of exhaust steam to escape without passing
through exhaust pipe A of smoke box and thus the draught therein is, lessened.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be, performed we declare that what we
claim is-
:
1. The combination and arrangement in the smoke box of a locomotive engine or
other boiler of a horizontal grating formed of perforated tubes fed with steam from
the nozzle of exhaust or blast pipe all substantially as described and as illustrated
in our drawings.
2. Exhaust nozzle B having within it lip b and annular channel & in combination
with perforated tubes C screwed into and radiating from it and preferably with
blower pipe D all substantially as and for the purposes set forth and arranged as
illustrated in our drawings.
3. Branch exhaust pipe E furnished with valve E¹ in combination with the
exhaust or blast pipe of a locomotive engine substantially as and for the purposes
set forth and arranged as illustrated in Figs. 1 and 2 of our drawings.
Dated this 13th day of August 1891.
D. ANDERSON,
By L. W., per F. B..
J. NAYLOR,
By L. W., per F: B.