IMPROVEMENTS IN TUBULAR STEAM BOILERS, AND FIRE-PLACES OR FURNACES USED THERE- WITH
Year: 1858

page_text: LETTERS PATENT to Daniel Evans, of Chobham Cottages, New Town,
Stratford, in the County of Essex, for the Invention of "IMPROVEMENTS
IN TUBULAR STEAM BOILERS, AND FIRE-PLACES OR FURNACES USED THERE-
WITH."
Sealed the 12th May 1859, and dated the 20th November 1858.
PROVISIONAL SPECIFICATION left by the said Daniel Evans at the
Office of the Commissioners of Patents, with his Petition, on the
20th November 1858.
I, DANIEL EVANS, of Chobham Cottages, New Town, Stratford, in the
County of Essex, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN TUBULAR STEAM BOILERS, AND FIRE-PLACES OR FURNACES USED THERE-
WITH," to be as follows:-
This Invention has for its object improvements in tubular steam boilers, and
fire-places or furnaces used therewith. For these purposes, in constructing
a tubular steam boiler, I form across the fire-box a horizontal or somewhat
inclined water chamber or compartment, open to the sides of the fire-box, and
also to the body of the boiler. Through this water chamber or compartment
of the boiler numerous tubes pass, the ends of which are respectively fixed in
the upper and lower plates of the compartment. The upper surface of the

page_text: compartment is to receive the fuel, and, in fact, forms the surface on which
the fuel is to be burned, which, however, is not new; but in my present
arrangement or construction of boiler, the draft is caused to pass down
through the fuel and down through the tubes into a chamber below, and
thence the heat and products of combustion pass through numerous horizontal
inclined or upright tubes through the body of the boiler into the chimney.
In order to heat water in a separate tank, or in the tender of a locomotive
engine, an arrangement of hollow or tubular fire bars and apparatus is used
and combined together in the following manner :-In the fire-box of a loco-
motive or other steam boiler is applied a rectangular frame, the four sides of
which are formed of, tubes, and across such frame there is another tube, but
in a higher plane than that in which the frame is placed. This upper tube is
connected at its ends to two sides of the rectangular frame, and from it the
outlet pipe proceeds, the inlet pipe being connected at one or two of the angles
of the rectangular frame. The central tube and two of the side tubes of the
frame are connected together by numerous smaller tubes, which are fixed
parallel to each other, and form the fire-bars, which incline from their inner
ends to their outer ends, where they are fixed to the two sides of the rectan
gular frame.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Daniel Evans in the Great Seal Patent Office on the 20th
May 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DANIEL
EVANS, of Chobham Cottages, New Town, Stratford, in the County of Essex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of November, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Daniel Evans, Her special licence that I, the said Daniel Evans,
my executors, administrators, and assigns, or such others as I, the said
Daniel Evans, 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

page_text: TUBULAR STEAM BOILERS, AND FIRE-PLACES OR FURNACES USED THEREWITH," upon
the condition (amongst others) that I, the said Daniel Evans, 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 Daniel Evans, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
This Invention has for its object improvements. in tubular, steam boilers, and
fire-places or furnaces used therewith. For these purposes, in constructing a
tubular steam boiler, I form across the fire-box a horizontal or somewhat
inclined water chamber or compartment, open to the sides of the fire-box, and
also to the body of the boiler. Through this water chamber or compartment
of the boiler numerous tubes pass, the ends of which are respectively fixed in
the upper and lower plates of the compartment. The upper surface of the
compartment is to receive the fuel, and in fact forms the surface on which the
fuel is to be burned, which, however, is not new; but in my present arrange-
ment or construction of boiler, the draft is caused to pass down through the
fuel, and down through the tubes into a chamber below, and thence the heat
and products of combustion pass through numerous horizontal inclined or
upright tubes through the body of the boiler into the chimney. In order to
heat water in a separate tank, or in the tender of a locomotive engine, an
arrangement of hollow or tubular fire-bars and apparatus is used and combined
together in the following manner :-In the fire-box of a locomotive or other
steam boiler is applied a rectangular frame, the four sides of which are formed
of tubes, and across such frame there is another tube, but in a higher plane
than that in which the frame is placed; this upper tube is connected at its
ends to two sides of the rectangular frame, and from it the outlet pipe proceeds,
the inlet pipe being connected at one or two of the angles of the rectangular
frame. The central tube and two of the side tubes of the frame are connected
together by numerous smaller tubes, which are fixed parallel to each other,
and form the fire-bars, which incline from their inner ends to their outer ends,
where they are fixed to the two sides of the rectangular frame.
Having thus stated, the nature of my said. Invention, I will proceed more
fully to describe the manner of performing the same.

page_text: DESCRIPTION OF THE DRAWING.
Figure 1 shows a longitudinal section of a steam boiler arranged or com-
bined according to my Invention; Figure 2 is a plan thereof; Figures 3, 4,
5, and 6 show two end views and two sections.
a, a, a, is a water chamber in
communication with the water spaces of the boiler. The boiler shown is one
that is suitable for a locomotive or fixed steam engine, but it will be evident
that in carrying out this part of my Invention, the form of the boiler used may
be greatly varied. Through the water chamber are numerous tubes, suitable
for the passage of air and products of combustion. I would here state that the
construction of the water chamber a, a, with its numerous passages, is similar
to what is described in the Specification of a previous Patent granted to me,
and the peculiarity, of the present Invention consists in so arranging the
perforated water chamber in combination with a steam boiler, that in place of
the draft being, as formerly described by me, up through the passages in the
water chamber, and up through the fuel placed thereon, the draft shall be
downward through the fuel, and thence down through the numerous passages
formed through the water chamber, and thence through the tubular flues b, b,
to the chimney c. I would remark that in place of the water chamber a, a,
being all in one, it may be composed of several parts, parallel to each other,
leaving a small or narrow space between the neighbouring parts, so that the
fuel may rest thereon, and the products of combustion pass down through
such narrow spaces, and in order that sufficient passages may be provided,
then each such narrower water space is to be constructed with tubular
passages through the water spaces, as above described, when using only one
water space a, a. Figure 7 shows a section of part of the fire-box of a
locomotive steam engine boiler, having a grating of hollow fire bars arranged
in such manner as to have water circulated to and from a tank of the tender,
and so to heat the water, and at the same time to keep the hollow fire-bars
cool; and it is preferred that the frame of hollow fire-bars should be supported
by and capable of moving on necks or axes at one end, in order, when desired,
to tilt off the fuel from the fire-bars. This arrangement consists of a hollow
rectangular frame A, A, and a raised tube B; between the sides of the rectan-
gular frame A and the tube B; there are numerous tubes a, a; hence, when
water is supplied to the one side of the rectangular frame A, the water will
pass through the tubes a into the larger tube B, thence through the other
tubes a into the opposite side A; the passage of the water from one side A to
the other side A is prevented by partitions in the end parts of the frame A.
Figure 8 shows a plan, and Figure 9 a section, of a modification of this

page_text: apparatus, wherein the pipe B is omitted, and the pipes a, a, pass directly
from the front side of the frame A to the rear side of the frame A, as is clearly
shown by the Drawing. c, c, are the necks or axes, on which the frame of
hollow bars A, a, turn; d is the inlet pipe, and e the outlet pipe.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the details herein described; but what I claim is,―
First, the constructing of steam boilers and fire-places with a downward
draft, as herein described.
And, secondly, I claim the constructing of apparatus, and applying the same
to a steam boiler for circulating and heating water, as herein described.
In witness whereof, I, the said Daniel Evans, have hereunto set my hand
and seal, this Nineteenth day of May, in the year of our Lord One
thousand eight hundred and fifty-nine.
DANIEL EVANS. (L.S.)