AN IMPROVED SPARK ARRESTER FOR LOCOMOTIVE AND OTHER ENGINES
Year: 1874

page_text: LETTERS PATENT to Frederick John Cheesbrough, of the Office for
Patents, 15, Water Street, Liverpool, in the County of Lancaster,
Consulting Engineer, for the Invention of "AN IMPROVED SPARK
ARRESTER FOR LOCOMOTIVE AND OTHER ENGINES."-A communication
from abroad by Abrahm Baschwitz, of Nakel, in the Empire of
Germany.
Sealed the 26th June 1874, and dated the 29th April 1874.
PROVISIONAL SPECIFICATION left by the said Frederick John
Cheesbrough at the Office of the Commissioners of Patents, with
his Petition, on the 29th April 1874.
I, FREDERICK JOHN CHEESBROUGH, of the Office for Patents, 15,
Water Street, Liverpool, in the County of Lancaster, Consulting Engineer,
do hereby declare the nature of the said Invention for "AN IMPROVED
SPARK ARRESTER FOR LOCOMOTIVE AND OTHER ENGINES," to be as follows:-
This Invention for an improved spark arrester for locomotives and
other engines consists of a curved extension flue, which is carried up

page_text: from the smoke box of the boiler, and laterally enlarged at the top, and
returning in a contracted proportion to an additional box or chamber
added to and at the end of the ordinary smoke box, which box or
chamber may be termed the sub-treasury box or ashes receptacle.
By
preference the chimney or discharge pipe from the flue is made double.
In constructing an apparatus according to this Invention the exterior
plate of the smoke flue rises vertically from the mouth thereof to about
the usual height of locomotive smoke pipes, and then curves round and
descends in a slightly inclined inward direction to the front, entering the
before-mentioned sub-treasury box or ashes receptacle in a contracted
form.
What may be termed the interior plate of the smoke flue occupies a
parallel position to that of the exterior plate before mentioned until it
terminates at a point near the top, where it joins two smoke pipes or
chimneys, and where the enclosed portion of the flue terminates, and
the full and partial combustion is discharged into the remaining inwardly
open portion of the flue. The products of combustion are driven forward
with great velocity by the exhaust steam from the engines, and pass up
the flue and down the inner surface of the inclined front side of the
external plate before mentioned, so that all the cinders, dust, and ashes
contained therein will fall into the sub-treasury box or ashes receptacle,
and the gaseous portion of the products of combustion pass upwards
through the smoke pipe or pipes fitted at the top of the flue. Each
smoke pipe is fitted with a screen where it opens into and joins the fluc.
To prevent the return of cinders, ashes, and other particles from the
receptacle box or before reaching it there is placed a perforated pipe or
screen running into the box from near the screen under the smoke pipe.
The sub-treasury box or ashes receptacle is fitted with pipes leading to
the fire-box, so that the contents of the box can be conducted back to
the fire again by a blast or exhaust or by mechanical means. The
receptacle box is also fitted with suitable doors to enable the contents to
be removed therefrom, and a suitable man-hole is fitted in the side of the
smoke flue to be used when requisite.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Frederick John Cheesbrough in the Great Seal Patent
Office on the 24th October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
JOHN CHEESBROUGH, of the Office for Patents, 15, Water Street, Liver-
pool, in the County of Lancaster, Consulting Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of April, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Frederick John Cheesbrough, Her special
licence that I, the said Frederick John Cheesbrough, my executors, admi-
nistrators, and assigns, or such others as I, the said Frederick John
Cheesbrough, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "AN IMPROVED SPARK ARRESTER FOR LOCOMOTIVE AND OTHER ENGINES," a
communication to me from abroad by Abrahm Baschwitz, of Nakel, in
the Empire of Germany, upon the condition (amongst others) that I, the
said Frederick John Cheesbrough, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Frederick John Cheesbrough, do
hereby declare the nature of the said 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 for an improved spark arrester for locomotives and
other engines consists of a curved extension flue, which is carried up
from the smoke box of the boiler and laterally enlarœed at the ton and

page_text: returning in a contracted proportion to an additional box or chamber
added to and at the end of the ordinary smoke box, which box or chamber
may be termed the sub-treasury box or ashes receptacle. By preference
the chimney or discharge pipe from the flue is made double.
In constructing an apparatus according to this Invention the exterior
plate of the smoke flue rises vertically from the mouth thereof to about
the usual height of locomotive smoke pipes, and then curves round and
descends in a slightly inclined inward direction to the front, entering the
before-mentioned sub-treasury box or ashes receptacle in a contracted
form.
What may be termed the interior plate of the smoke flue occupies a
parallel position to that of the exterior plate before mentioned until it.
terminates at a point near the top, where it joins two smoke pipes or
chimneys, and where the enclosed portion of the flue terminates, and the
full and partial combustion is discharged into the remaining inwardly
open portion of the flue. The products of combustion are driven forward
with great velocity by the exhaust steam from the engines, and pass up.
the flue and down the inner surface of the inclined front side of the
external plate before mentioned, so that all the cinders, dust, and ashes
contained therein will fall into the sub-treasury box or ashes receptacle,
and the gaseous portion of the products of combustion pass upwards
through the smoke pipe or pipes fitted at the top of the flue. Each
smoke pipe is fitted with a screen where it opens into and joins the flue..
To prevent the return of cinders, ashes, and other particles from the
receptacle box or before reaching it there is placed a perforated pipe or
screen running into the box from near the screen under the smoke pipe.
The sub-treasury box or ashes receptacle is fitted with pipes leading to
the fire-box, so that the contents of the box can be conducted back to
the fire again by a blast or exhaust or by mechanical means. The
receptacle box is also fitted with suitable doors to enable the contents to
be removed therefrom, and a suitable man-hole is fitted in the side of the
smoke flue to be used when requisite.
The before-going being the nature, object, and purposes of this
Invention I will now proceed to describe more in detail how the same
may be put into practical operation, reference being had to the accom-
panying Drawings, which form part of this Specification. Like letters
denote similar parts,

page_text: Figure 1 is an elevation of the end of a locomotive fitted with this
Invention; Figure 2 is a front view of same.
An improved spark arrester according to this Invention consists of the
extension flue E, which is carried up from the smoke box A, and is
laterally enlarged at the top, forming the chamber B. This flue returns
in a contracted proportion to an additional box or chamber C added to
and at the end of the ordinary smoke box A, which box or chamber C
may be termed the sub-treasury box or ashes receptacle. By preference
the chimney or discharge pipe D is made double, as shown at D, D¹,
Figure 2. The exterior plate E¹ of the flue E rises vertically from the
_mouth thereof to about the usual height of locomotive smoke pipes, and
then curves round and descends in a slightly inclined inward direction
to the front, entering the sub-treasury box C. The interior plate G of
the flue E occupies a parallel position to that of the plate E¹ until it
terminates at the point H, where the inwardly closed portion terminates
and discharges the full and partial combustion, so that the products of
combustion, namely, all cinders, dust, and ashes being driven forward with
great force by the exhaust steam will pass down the flue F into the
box C, and the gaseous portions will pass upwards through the screen L,
and discharge through the smoke pipe D. To prevent the return of
cinders, ashes, and other particles from the box C there is fitted a
perforated pipe or screen I, which extends from a point near the screen L
to the sub-treasury box C. M is a door into the sub-treasury box C.
N is the ordinary door into the smoke box of the locomotive; P, blast
pipe for exhaust steam; R is a pipe leading from sub-treasury box C to
the furnace of the engine. This pipe R may in some instances be led
through the boiler. Through this pipe R the ashes and other matter
may be conducted back from the box C to the fire by a blast or exhaust
or mechanical means, as will be understood.
Having now described and ascertained the nature, object, and purposes
of this Invention, and shown how the same may be put into operation, I
would have it understood that the same is not confined to any particular
dimension, nor to the particular shape as shown, as the same may be
considerably altered, but what I claim as the Invention communicated
to me by my foreign correspondent is, the combination of the smoke
flue E with the laterally enlarged central chamber B, and the discharge
pipes D, D¹, insuring an increased draught, together with the flue F,
perforated pipe or screen I, and the sub-treasury box C, and the pipe R

page_text: leading from the sub-treasury box C to the fire-box, whether through
the boiler or under the engine, substantially as described and for the
purposes set forth.
In witness whereof, I, the said Frederick John Cheesbrough, have
hereunto set my hand and seal, this Twenty-second day of October,
in the
year of our Lord One thousand eight hundred and seventy-
four.
FREDERICK JOHN (L.S.) CHEESBROUGH.