AN IMPROVED CIRCULATING BOILER, WHICH MAY BE USED IN CONJUNCTION WITH ANY KIND OF APPARATUS WHERE WATER IS USED FOR WARMING
Year: 1884

page_text: We THOMAS Wood of N° 21 Broadmead in the city and county of Bristol,
dining rooms proprietor, and GEORGE MILTON of Rudgeway House in the parish of
Stapleton and in the county of Gloucester Horticulturist do hereby declare the
nature of our invention for AN IMPROVED CIRCULATING BOILER, WHICH MAY BE
USED IN CONJUNCTION WITH ANY KIND OF APPARATUS WHERE WATER IS USED
FOR WARMING to be as follows:-
This invention relates to improvements in that class of boilers well known as
circulating boilers, which are used for heating the water which circulates through
a system of pipes which may be used for the purpose of warming greenhouses
churches or buildings of any kind, and all other places requiring warmth.
In carrying our invention into practice we use two hollow metal boxes or end
pieces, the one for the front and the other for the back of the boiler, and connect
these two end pieces with each other by a number of horizontal tubes of metal,
securely cemented or otherwise jointed, so that the two end pieces and the
horizontal tubes shall form when properly fitted together, one complete boiler.
The said horizontal tubes are arranged so as to enclose a space suitable for a
furnace or combustion chamber. They are set at varying distances from each
other so that the bottom tubes act as fire bars; the side and upper tubes allow a
free communication between the inside and the outside of the furnace, while
a much wider space is left between the top tubes to allow room for feeding the
furnace with fuel. In the interior of the furnace or combustion chamber, are
several horizontal tubes, running in the same direction and fitted in a similar
manner to those forming the outside of the furnace, which inside tubes are
surrounded by the burning fuel when the boiler is in operation.
The end pieces or hollow boxes are provided with connections made to suit the
system of pipes, which the boiler is required to supply with hot water, the inlets
being near the bottom, and the outlets near the top of the boiler. The front end
piece of the boiler is furnished with openings to give access to the interior of the
furnace, for stoking or tending the fire, which apertures may be closed by hinged
doors when the boiler is in operation. We also provide a blow off cock for
emptying and cleaning the boiler.

page_text: The boiler must be properly encased with brickwork or other suitable material,
in such manner as to allow a free air space underneath the bottom of the tubes,
and spaces at the sides to form flues leading to some convenient uptake.
Our invention will be well understood by reference to the accompanying
drawing, in which Figure 1 is a front view, Figure is an end or back view,
Figure 3 is a cross section, and Figure 4 is a longitudinal section.
We do not confine ourselves to any particular number, dimension or shape of
the tubes, nor to the exact form of the space which they enclose; nor to the
dimensions or shape of the end pieces, but only to the use of a number of
horizontal (or nearly horizontal) tubes arranged in such manner that the outer
ones enclose or surround the fire, and the inner ones are surrounded by the fire
and the whole of which tubes in connection with end pieces form an Improved
Circulating boiler.
.
THOMAS WOOD.
GEORGE MILTON.

page_text: We THOMAS WOOD of N° 21 Broadmead in the city and county of Bristol
dining rooms proprietor, and GEORGE MILTON of Rudgeway House in the parish of
Stapleton and in the county of Gloucester horticulturist, do hereby declare the
nature of our invention for AN IMPROVED CIRCULATING BOILER 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 improvements in that class of boilers well known as
circulating boilers which are used for heating the water which circulates through
a system of pipes. The heat which radiates from these pipes may be used for the
purpose of warming greenhouses, churches, or buildings of any kind and all other
places requiring warmth.
Our invention will be well understood by reference to the accompanying
drawings which shew two forms in which we make our circulating boiler.
Figures 1 and 2 are front views, Figures 3 and 4 are side views, Figures 5 and 6
are cross sections and figures 7 and 8 are longitudinal views or plans in which for
clearness, the bottom and interior tubes only are shown. Figure 9 is an enlarged
horizontal section of one end of an interior tube together with a portion of an end
piece. In these figures the letters used to distinguish the several parts of the
boilers are the same in every view. A is the front end piece or hollow metal box,
B is the back end piece. The outer horizontal tubes are lettered C, and the interior
horizontal tubes are lettered D. The outlets are lettered E, and the inlets F, the
stoke holes G, and the hoppers or boxes into which the fuel is fed are lettered H.
In carrying our invention into practice we use two hollow metal boxes or end
pieces A and B, the one for the front and the other for the back of the boiler, and
connect these two end pieces with each other by a number of horizontal tubes C
and D securely cemented or otherwise jointed so that the two end pieces and the
horizontal tubes form when properly fitted together, one complete boiler.
The exterior horizontal tubes C, are arranged so as to enclose a space suitable
for a furnace or combustion chamber. The bottom tubes act as fire bars, the sido
tubes allow of a free communication between the inside and the outside of the
furnace, while a much wider space is left between the top tubes to allow room for
feeding the furnace with fuel.
In the interior of the furnace or combustion chamber are several horizontal
tubes D running in the same direction and fitted in the same manner as the
tubes C, which interior tubes D are surrounded by the burning fuel when the
boiler is in operation.
The end pieces A and B are provided with inlets F near the bottom and
outlets E near the top, one or more of each being used as may be desired, or as
may the more conveniently suit the system of pipes to which the boiler has to be
connected.
The front end piece is provided with openings or stoke holes G to give access to
the interior of the furnace which apertures may be closed by doors. These doors,
together with covers for the hoppers H; blow off cocks or plugs, and other
necessary but unimportant details are not shown in the drawings.
The boiler when completed and connected with its system of circulating pipes,
must be properly encased with brickwork or other suitable material in such manner
as to allow a free air space underneath the bottom tubes C, and spaces at the sides
to form flues leading to some convenient uptake.

page_text: The action of the boiler when connected with its circulating pipes and properly
fixed is as follows:-On the boiler and pipes being filled with water and the fire
being lit, its heat is communicated to all parts of the boiler with which it comes in
contact but more especially to the horizontal tubes in the interior of the fire. The
products of combustion escape between the horizontal tubes at the sides of the
furnace along the flues formed in the outer casing and thence to the uptake.
The water inside the boiler on being sufliciently heated commences to circulate
through the pipes, the hotter portion flowing from the outlet at the top, through
the circulating pipes in which it becomes cooler again, and returns to the boiler
by the inlet at the bottom; this action continuing as long as the boiler is in
operation.
We do not confine ourselves to any particular number, dimension, or shape of
the tubes, nor to the exact form of the space they enclose. Neither do we restrict
ourselves to the size or shape of the end pieces, nor to the number or size of the
inlets and outlets, but only to the use of horizontal (or nearly horizontal) tubes
aranged in such manner that the outer ones enclose or surround the fire, and the
interior ones are surrounded by the fire, and the whole of which set of tubes in
connection with the two end pieces form an improved circulating boiler.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, We declare that what
we claim is,―
(1) The employment of the interior tubes D, substantially as herein drawn and
described, for the purpose of increasing the efficiency of circulating boilers.
(2) The combination of the interior tubes D, with the exterior tubes C for the
purpose of constructing an improved circulating boiler, substantially as herein
drawn and described.
Dated this 25th day of September 1884.
THOS. WOOD.
GEORGE MILTON.