IMPROVEMENTS IN APPARATUS FOR THE ADMISSION OF AIR TO STEAM BOILER FURNACES
Year: 1875

page_text: LETTERS PATENT to Frederick Lipscombe, of the Strand, in the
County of Middlesex, Water Filter Manufacturer, for the Inven-
tion of "IMPROVEMENTS IN APPARATUS FOR THE ADMISSION OF AIR TO
STEAM BOILER FURNACES."
PROVISIONAL SPECIFICATION left by the said Frederick Lipscombe
at the Office of the Commissioners of Patents, with his Petition,
on the 24th December 1875.
I, FREDERICK Lipscombe, of the Strand, in the County of Middlesex,
Water Filter Manufacturer, do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN APPARATUS FOR THE ADMISSION OF AIR TO
STEAM BOILER FURNACES," to be as follows:-
My Invention consists in forming a channel or inlet through a boiler
or steam generator, this channel being placed between the furnace door
and the furnace bridge, and running more or less horizontally along the

page_text: exterior of the boiler to some spot convenient to the stoker, the furnace
end of the channel being of iron lined with fire-clay or fire-clay mixed
with coke, plumbago, or other substance capable when mixed with fire-
clay of considerably resisting the injurious action of great heat; that
portion of the channel away from the injurious influence of the fire may
be formed of iron, brick, or other suitable material or combination of
materials, the exterior extremity of the channel being fitted with a door,
slide, or valve, or other contrivance by which the supply of air may be
conveniently regulated. By this arrangement the admitted air becomes
effectively commingled with the smoke and unconsumed products
whereby the products of combustion are more completely consumed.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Frederick Lipscombe in the Great Seal Patent
Office on the 24th June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
LIPSCOMBE, of the Strand, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of December, in the
year of our Lord One thousand eight hundred and seventy-five, in the 39th
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Frederick Lipscombe, Her special license that
I, the said Frederick Lipscombe, my executors, administrators, and
assigns, or such others as I, the said Frederick Lipscombe, my exe-
cutors, administrators, or assigns, should at any time agree with,
and no others, from time to time and at all times thercafter 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 “Im-
PROVEMENTS IN APPARATUS FOR THE ADMISSION OF AIR TO STEAM BOILER
FURNACES," upon the condition (amongst others) that 1, the said
Frederick Lipscombe, my executors or administrators, by an instru-
ment in writing under my, hand and seal, 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

page_text: Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Frederick Lipscombe, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the accom-
panying Drawings, and to the letters and figures marked thereon, that
is to say :-
My said Invention consists in forming through a boiler or steam
generator an air channel or inlet situate between the furnace door and
the furnace bridge, and if necessary running more or less horizontally
along the exterior of the boiler to some spot convenient to the stoker.
The furnace end of the channel is of iron lined with fire-clay or fire-clay
mixed with coke, plumbago, or other substance capable when mixed
with fire-clay of considerably resisting the injurious action of great heat,
but that portion of the channel which is away from the injurious
influence of the fire may be formed of iron, brick, or other suitable
material or combination of materials. The exterior extremity of the
channel is fitted with a door, slide, or valve, or other contrivance by
which the supply of air may be conveniently regulated.
And in order that my said Invention may be fully understood, I shall
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings, the
same letters of reference indicating corresponding parts in both the
Figures.
Figure 1 of my Drawings represents a longitudinal section of a portion
of a steam boiler with my Invention applied thereto according to one
modification, and Figure 2 is a similar view illustrating another modi-
fication referring to Figure 1.
A is the shell of the boiler; B is the furnace; C is the fire-bridge,
and D is the fire-door. Through that portion of the boiler A situate
over the furnace B between the fire-bridge C and the fire-door D, I form
a channel E which consists of a metal tube lined or plugged with fire-
clay or other refractory material, either for a portion of its length as
shewn at F in my Drawing, or throughout its entire length if preferred.
The fire-clay body F is formed with a passage or passages a for the

page_text: admittance of air into the furnace, and the exterior extremity of the
tube E is fitted with a slide G for regulating the supply of air to the
tube E. The opening and closing of the slide G may be effected either
by hand or automatically, the rod H with which the slide is provided
being in the latter case connected with the furnace door D by any
ordinary or suitable devices, so as to cause the slide to be opened simul-
taneously with the opening of the furnace door, the slide remaining open
after the closing of the furnace door until it is convenient for the stoker
to close it.
In the modification shewn in Figure 2, the air channel E is continued]
from the boiler to any convenient spot, the slide or other regulating
device being placed at the exterior end G of the prolonged portion E¹.
The Invention may be otherwise modified in its details whilst
retaining the essential features herein-before described. By means of
this arrangement the admitted air becomes thoroughly commingled with
the smoke and unconsumed products, whereby their combustion is more
completely effected.
Having now described and particularly ascertained the nature of my.
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider
to be novel and original, and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is,―
First. The admission of air to a steam boiler furnace by means of a
channel or inlet formed through the boiler, substantially in the manner
herein-before described and illustrated by my Drawings.
Secondly. The application and use to and in the tube forming the
air channel or inlet of fire-clay or other refractory material, substan-
tially as herein-before described.
In witness whereof, I, the said Frederick Lipscombe, have to this
my Specification set my hand and seal, the Twenty-third day a
of June, One thousand eight hundred and seventy-six.
FRED. LIPSCOMBE. (L.S.)