Improvements in or relating to Furnaces.
Year: 1898

page_text: Date of Application, 4th May, 1898
Complete Specification Left, 31st Jan., 1899-Accepted, 4th Mar.,
1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Furnaces.
I, WILLIAM DENHAM GRIMSHAW, of Plantation Works, Accrington, in the
County of Lancaster, Calico Printer, do hereby declare the nature of this invention
to be as follows; -
This invention relates to that class of furnace which is provided with an air
pipe extending a certain distance into the furnace and provided at its outer open
end with a steam jet so that jets of air and steam are thrown through perforations
in the said pipe at a suitable angle upon the fire, as protected by myself in 1889
by Patent No. 16,190, and in 1890 by Patent No. 7,625.
The object of the present invention is to prevent the liability of the said per-
forated pipe to become burnt by-careless firing of the furnace, and improve the
steam and air injection in the said furnace.
For this purpose I admit the requisite amount of steam through two jets,
instead of one as before, in each pipe; one jet is at the entrance or air inlet end
of the pipe and the other at the end of a small pipe projecting some distance say
one half or two thirds of the way along inside the pipe both jets being projected
in the same direction inwards, and being preferably central in the air pipe.
This arrangement will not only prevent the pipe from becoming red hot at
any part by keeping up the rush of air better therein but will also cause the
flames and gases from the burning fuel to take a more completely circular or
swirling direction in the furnace thereby increasing the efficiency of the apparatus
for smoke consumption or prevention.
1 1
1000
GEO. DAVIES & SON,
Agents for the Applicant,
4, St. Ann's Square, Manchester.
Improvements in or relating to Furnaces.
I, WILLIAM DENHAM GRIMSHAW, of Plantation Works, Accrington, in the
County of Lancaster, Calico Printer, 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 that class of furnace which is provided with a perforated
air pipe extending a certain distance into the furnace and provided at its outer
open end with a steam jet so that jets of air and steam are thrown through per-

page_text: forations in the said pipe at a suitable angle upon the fire, as protected by myself
in 1889 by Patent No. 16,190, and in 1890 by Patent. No. 7,625.
The object of the present invention is to prevent the liability of the said per-
forated pipe to become burnt by careless firing of the furnace, and improve the
steam and air injection in the said furnace.
The manner in which my said invention is to be performed or carried into
practical effect will be readily understood on reference to the sheet of drawings
hereunto annexed and the following explanation thereof.
Fig. 1 on the drawing is a longitudinal section.
Fig. 2 a longitudinal elevation, and Fig. 3 a transverse section of a perforated
air pipe showing the application thereto of my present improvements. a being
the perforated pipe which has one row of perforations, as shown.
For the purposes of my invention I admit the requisite amount of steam through
two jets b and c, instead of one as before, in each pipe; one jet b is at the entrance
or air inlet end of the pipe and the other c at the end of a small pipe d projecting
some distance say one half or two thirds of the way along inside the pipe a both
jets b and c being projected in the same direction inwards, and being preferably
central in the air pipe a.
This arrangement will not only prevent the pipe a from becoming red hot at
any part by keeping up the rush of air better therein but will also cause the flames
and gases from the burning fuel to take a more completely circular or swirling
direction in the furnace thereby increasing the efficiency of the apparatus for
smoke consumption.
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:
In that class of furnace which is hereinbefore referred to the combination with
the perforated air pipe extending into the furnace of a second or additional steam
jet placed at the end of a small tube projecting some distance (say from one half
to two thirds of the way) along inside the air pipe, both steam jets being projected
in the same direction and being preferably placed centrally in the said air pipe.
Dated this 27th day of January 1899.
GEO. DAVIES & SON,
Agents for the Applicant,
4, St. Ann's Square, Manchester.