IMPROVEMENTS IN STEAM BOILERS
Year: 1866

page_text: LETTERS PATENT to George Davies, of No. 1, Serle Street, Lincoln's Inn,
in the County of Middlesex, and No. 87, St. Vincent Street, in the
City of Glasgow, Civil Engineer and Patent Agent, for the Invention of
"IMPROVEMENTS IN STEAM BOILERS."-A communication from abroad by
William Schaubel, of Philadelphia, Pennsylvania, United States of
America.
Sealed the 26th October 1866, and dated the 1st May 1866.
PROVISIONAL SPECIFICATION left by the said George Davies at the
Office of the Commissioners of Patents, with his Petition, on the
1st May 1866.
I, GEORGE DAVIES, of No. 1, Serle Street, Lincoln's Inn, in the County of
Middlesex, and No. 87, St. Vincent Street, in the City of Glasgow, Civil
Engineer and Patent Agent, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN STEAM BOLLERS," (a communication to me from
abroad by William Schaubel, of Philadelphia, Pennsylvania, United States of
America,) to be as follows:-
This Invention consists principally of a coiled flue arranged within an outer

page_text: casing in connection with a fire chamber in the manner hereafter described,
so as to form a steam boiler which presents an extensive heating surface
within a small compass, and this at less expense as regards 'construction than
the same heating surface can be obtained by any ordinary system of flues and
tubes.
The Invention further consists of certain tubes connected to the fire-box
and arranged in the manner hereafter described for the purpose of equalizing
the combustion of fuel on the grate. The outer casing of the boiler is of a
vertical cylindrical form with a dome-shaped top. The outer casing of the
fire chamber is rectangular in horizontal section with a rounded top, and
projects from one side of and forms part of the outer casing of the boiler.
The fire-door is in the end of the fire chamber furthest form the cylindrical
part of the boiler, and from the reverse end passes a coiled flue winding spirally
inwards to the centre where it communicates with a vertical flue or chimney
which passes upwards through the dome-shaped top of the boiler. There is
a tube underneath the boiler communicating through orifices with the interior
of the same, and provided with a cock at the exterior so that the water in
the boiler can be blown off at pleasure. There are also tubes leading from
the upper part of the fire chamber (near the door) into the coiled flue for
the purpose of maintaining the entire fuel in the grate at an uniform heat
and preventing the accumulation of partially consumed fuel at the front corners
of the fire chambers.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George-Davies in the Great Seal Patent Office on the 1st
November 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
DAVIES, of No. 1, Serle Street, Lincoln's Inn, in the County of Middlesex,
and No. 87, St. Vincent Street, in the City of Glasgow, Civil Engineer and
Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty. Queen Victoria, by Her Letters
Patent, bearing date the First day of May, in the year of our Lord Orie
thousand eight hundred and sixty-six, in the twenty-ninth year of Her reign,
did, for Herself,. Her heirs and successors, give and grant unto me, the said
George Davies, Her special licence that I, the said George Davies, my ex-
ecutors, administrators, and assigns, or such others as I, the said George

page_text: Davies, 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 "IMPROVEMENTS IN
STEAM BOILERS," (a communication to me from abroad by William Schaubel,
of Philadelphia, Pennsylvania, United States of America, upon the condition
(amongst others) that I, the said George Davies, 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 Inven-
tion, 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 George Davies, 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 in writing, and on reference to the accompanying Sheet of Drawings,
that is to say: -
This Invention consists principally of a coiled flue arranged within an outer
casing in connection with a fire chamber in the manner hereafter describod,
so as to form a steam boiler which presents an extensive heating surface
within a small compass, and this at less expense as regards construction than
the same heating surface can be obtained by any ordinary system of flues and
tubes.
The Invention further consists of certain tubes connected to the fire-box,
and arranged in the manner hereafter described, for the purpose of equalizing
the combustion of fuel on the grate. The outer casing of the boiler is of a
vertical cylindrical form with a dome-shaped top. The outer casing of the
fire chamber is rectangular in horizontal section with a rounded top, and
projects from one side of and forms part of the outer casing of the boiler.
The fire-door is in the end of the fire chamber furthest from the cylindrical
part of the boiler, and from the reverse end passes a coiled flue winding spirally
inwards to the centre, where it communicates with a vertical flue or chimney
which passes upwards through the dome-shaped top of the boiler. There is
a tube underneath the boiler communicating through orifices with the interior
of the same, and provided with a cock at the exterior, so that the water in the
boiler can be blown off at pleasure. There are also tubes leading from the
upper part of the fire chamber (near the door) into the coiled flue for the

page_text: purpose of maintaining the entire fuel in the grate at an uniform heat and
preventing the accumulation of partially consumed fuel at the front corners of
the fire chambers.
Such being the nature and object of the said Invention for "Improvements
in Steam Boilers," I will now proceed to describe more in detail the
manner in which the same is to be or may be performed or carried into
practical effect, and in order that the same may be distinctly understood I
have annexed hereunto a Sheet of Drawings illustrative thereof, and have
marked the same with figures and letters of reference corresponding with those
in the following explanation thereof, that is to say:-
Figure 1 is a vertical section of the improved steam boiler; Figure 2, an
end view; Figure 3, a tranverse section on the line 1, 2; Figure 1 and
Figure 4, a sectional plan of the line 3, 4, Figure 1.
The outer casing A of the boiler is of a circular form with a dome-shaped
top;
B is the outer casing of the fire chamber, projecting from and forming
a part of the outer casing A; C is the inner casing of the fire chamber; D, the
fire-door; and E, the grate. The fire chamber communicates with the coiled
flue G, which terminates at and communicates with the chimney H, situated
in the centre of the body of the boiler and passing through its dome-shaped
top. On the outside and on each side of the fire-box is a pipe I, each pipe com-
municating with the fire chamber at a point near the front of the same and
at the opposite end with the coiled flue G. K is a tube situated underneath
the boiler and communicating through orifices with the interior of the same,
a cock being attached to the end of the tube outside this boiler so that the
water in the same can be blown off at pleasure. The coiled tube having both
sides, top and bottom, exposed to the water in the boiler presents an extensive
beating surface in a small compass, and this at much less expense as regards
construction than the same heating surface can be obtained by any of the
ordinary system of flues and tubes. The object of the tubes I, I, is to convey
a portion of the products of combustion upwards from the fire chamber into
the coiled flue, thereby tending to maintain the entire fuel in the grate at
an uniform heat and preventing the accumulation of partially consumed fuel
at the front corners of the fire chambers.
66
Having now described the nature and object of the said Invention for
Improvements in Steam Boilers," together with the manner in which the
same is to be or may be performed or carried into practical effect, I would
remark in conclusion that I claim as the Invention (communicated to me by
the said William Schaubel).

page_text: Firstly, the arrangement substantially as described of the casing A, coiled
flue G, chimney H, and outer and inner casings of the fire-box.
Secondly, the pipes I, I, arranged in respect to the fire-place and coiled flue
substantially as and for the purpose set forth.
In witness whereof, I, the said George Davies, have hereunto set my
hand and seal, this First day of November, in the year of our Lord
One thousand eight hundred and sixty-six.
GEORGE DAVIES. (L.S.)