IMPROVEMENTS IN THE CONSTRUCTION OF SPARK ARRESTORS AND IN THEIR APPLICATION TO THE "and FUNNELS OF THE BOILERS OF PORTABLE LOCOMOTIVE AND OTHER ENGINES in
Year: 1884

page_text: I FRANK GARRETT of Leiston Works in the County of Suffolk Agricultural
Engineer do hereby declare the nature of my said Invention for "IMPROVEMENTS
IN THE CONSTRUCTION OF SPARK ARRESTORS AND IN THEIR APPLICATION TO THE
"and
FUNNELS OF THE BOILERS OF PORTABLE LOCOMOTIVE AND OTHER ENGINES
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :—
My Invention relates to the more convenient and effectual emptying and cleaning
of spark arrestors applied to the funnels of the boilers of portable locomotive and
other engines and consists in the means hereinafter described for affording ready
access to the interior of the spark arrestor and for enabling its contents to be
discharged therefrom into the smoke box.
For these purposes, the spark arrestor is formed or constructed with an open
bottom and applied to the joint between the funnel and the funnel-bottom leading
into the smoke box.
On raising one side of the spark arrestor by opening the said joint ready access
is afforded to the interior through the open bottom of the arrestor and any sparks
or other deposits which may have accumulated in the arrestor will be caused
during the process of cleaning the same, to pass into the smoke box instead of
being discharged outside through apertures as usual.
The arrangement above described is especially valuable when straw is used as
fuel.
In order that my Invention may be fully understood and readily carried into
effect I will proceed to describe it more particularly by the aid of the accompanying
drawings in which are represented my improvements as applied to the spark
arrestor known as "Graham's spark arrestor" in connection with the boiler of a
portable steam engine.
:
DESCRIPTION OF THE DRAWINGS.
Fig 1 is a vertical section shewing the usual application of the "Graham spark
arre-tor" to the funnel of a portable steam engine.
Figures 2 and 3 illustrate the adaptation and application of "Graham's spark
arrestor to the funnel of a portable steam engine under my invention.
"
In the several figures the same letters of reference indicate corresponding parts.
A is the funnel A¹ is the funnel bottom connecting the funnel to the smoke box
of the boiler. B is the spark arrestor which is usually provided with doors C. C.

page_text: shown in Fig: 1 as covering external traps or openings and is also usually applied
as shewn to the upper part of the funnel. The only means for emptying and
cleaning the interior of the spark arrestor when so applied has hitherto been
by external openings and doors. In figures 2 and 3 the spark arrestor B is shown
as being applied to the top half E of the joint E E¹ connecting the funnel A with
the funnel bottom A¹ and as being provided with apparatus for opening and closing
the same as required.
On reference to these figures it will be seen that the inverted cone of the spark
arrestor B is truncated and is open at the bottom which spark arrestor is fixed to
the top half E of the funnel joint E E¹ connecting the funnel A to the funnel
bottom A leading to the smoke box. The apparatus shewn in figures 2 and 3 for
opening and closing the spark arrestor and funnel consists of a toothed quadrant D
connected to the top half E of the funnel joint gearing with a worin F on a
spindle G worked by the handle H but the opening and closing may be effected by
other mechanical means or by hand.
In Fig 3 the spark arrestor is shewn as opened far enough for emptying and
cleaning but the joint E E¹ may be opened further in order to lower the funnel into
the funnel-rest as may be required for travelling.
It will be seen that by means of the above described arrangement of the parts
(especially as shewn in fig: 3) the spark arrestor B can be opened as required so as
to afford ready and complete access to its interior thereby facilitating the scraping
and cleaning of the parts and the emptying into the smoke box of the contents of
the spark arrestor and so avoiding the inconvenience hitherto experienced by
discharging the contents of the spark arrestor through external traps or openings
in the ordinary manner.
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
I claim is:-
The adaptation and application of a spark arrestor to the joint between the
funnel and the funnel bottom in the boilers of portable locomotive and other
engines whereby access is afforded to the interior of the spark arrestor in such a
manner as to admit of its being effectually cleaned and its contents discharged into
the smoke box substantially as and for the purpose described.
Dated this twenty fifth day of November 1884.