IMPROVEMENTS IN HOT BLAST APPARATUS FOR SMELTING AND OTHER LIKE PURPOSES
Year: 1874

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of "IMPROVEMENTS IN HOT BLAST APPARATUS FOR
SMELTING AND OTHER LIKE PURPOSES." -A communication from abroad
by Henry Essex, of Meadville, Pennsylvania, United States of
America.
Sealed the 25th September 1874, and dated the 30th June 1874.
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition, on
the 30th June 1874.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN HOT BLAST APPARATUS
FOR SMELTING AND OTHER LIKE PURPOSES," a communication, to be as
follows:-
The object of my Invention is to furnish an apparatus for producing

page_text: and supplying a hot air blast for cupolas, blast furnaces, or other places
where a hot blast is necessary for smelting or other purposes. And the
nature of the said Invention consists in an air heating and forcing
vessel, or two or more of such vessels provided with suitable openings
for the entrance of cold air, for the exit of waste hot air, and for the
exit of hot air under pressure toward the place where the blast is
required.
and supplying a hot air blast for cupolas, blast furnaces, or other places
where a hot blast is necessary for smelting or other purposes. And the
nature of the said Invention consists in an air heating and forcing
vessel, or two or more of such vessels provided with suitable openings
for the entrance of cold air, for the exit of waste hot air, and for the
exit of hot air under pressure toward the place where the blast is
required.
It also consists in the construction and combination of parts as herein-
after more fully set forth.
I employ a brick furnace of any suitable construction and elevated so
as to have an open space underneath the bottom thereof. Through the
furnace I extend a vessel or vessels of cylindrical or other suitable form.
These vessels may be made of any material suitable for the purpose and
of any size desired and placed in any position, but preferably vertically,
as shown. The said vessels may extend above and below the furnace
and have a cold air inlet at the bottom and an outlet at the top for
waste hot air. A pipe leads from the said vessel to the place where the
hot air blast is desired, said pipe being provided with a check valve.
The said openings are provided with tight-fitting valves of any suitable
construction and connected by a rod to be operated together. When
these valves are opened the waste hot air in the said vessel rushes out
at the top and the cold air passes in at the bottom to replace it. The
valves are then closed when the air in the vessel will expand by the
heat and a part thereof force its way through the pipe to the cupola,
furnace, or other place where the blast is desired.
Any number of the heating vessels may be used together to produce
the desired blast. If the air is not hot enough after it comes from the
said heating vessels it may be passed on its way to the blast furnace
through a heating furnace or furnaces. The air in the said vessel may
be stirred by means of a fan or fans revolved inside of the said vessel
for the purpose of facilitating the heating of the air.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 24th December 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of June, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors
give and grant unto me, the said William Robert Lake, Her special
licence that I, the said William Robert Lake, my executors, adminis-
trators, and assigns, or such others as I, the said William Robert Lake,
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, excrcise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
HOT BLAST APPARATUS FOR SMELTING AND OTHER LIKE PURPOSES," a communi-
cation to me from abroad by Henry Essex, of Meadville, Pennsylvania,
United States of America, upon the condition (amongst others) that I,
the said William Robert Lake, 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 In-
vention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Scal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Robert Lake, 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, reference being had to the accompanying
Drawing forming a part of this Specification:-
The object of my Invention is to furnish an apparatus for producing
and supplying a hot air blast for cupolas, blast furnaces, or other places
where a hot blast is necessary for smelting or other purposes. And the
nature of my Invention consists in one or more air heating and forcing

page_text: vessels, each provided with suitable openings for the entrance of cold
air, for the exit of waste hot air, and for the exit of hot air under
Figure 1 is a plan of my Invention, and Figure 2 is a central vertical
section of the same through the line x, x, Figure 1.
A represents a brick furnace of any suitable construction and
elevated so as to have an open space underneath the bottom thereof.
Through the furnace A passes one or more vessels B of cylindrical or
other suitable form. These vessels may be made of any material
suitable for the purpose and of any size desired and placed in any
position, but are preferably vertical, as shown. The vessel B shown in
the Drawing extends above and below the furnace and has a cold air
inlet C at the bottom and an outlet D at the top for waste hot air.
G represents a pipe leading from the vessel B to the place where the hot
blast is desired, said pipe being provided with a check valve a. The
openings C and D are provided with tight-fitting valves E, E, of any
suitable construction and connected by a rod 6 so as to be operated
together.
I do not confine myself to one inlet and one outlet for each vessel B
as it may be provided with any desired number, each opening however
being provided with a valve.
When the valves E, E, are opened the waste hot air in the vessel B
rushes out at the top and the cold air passes in at the bottom to replace
it. The valves are then closed when the air in the vessel will expand
by the heat and a part thereof will force its way through the pipe G to
the cupola, furnace, or other place where the blast is desired.
Any number of the heating vessels may be used together to produce
the desired blast. If the air is not hot enough after it comes from the
heating vessels it may be passed on its way to the blast furnace through a
heating furnace or furnaces. The air in the vessel B may be stirred by
mcans of a fan or fans revolved inside of said vessel for the purpose of
facilitating the heating of the air.

page_text: Having thus fully described the said Invention as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim,-
First. One or more air heating and forcing vessels B arranged within
a furnace, and each provided with openings for the entrance of cold air,
for the exit of waste hot air, and for the exit of hot air under pressure, as
herein set forth.
Second. The combination with the air heating vessel B having
openings C, D, of the valves E, E, and the pipe G with check valve a,
all constructed substantially as and for the purposes herein set forth.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Twenty-fourth day of December,
in the year of our Lord One thousand eight hundred and seventy-
four.
Witness,
HY. JA. NOONĘ.
WM. ROBT. LAKE. (L.S.)