Year: 1888

page_text: Date of Application, 4th May, 1888
Complete Specification Left, 11th Dec., 1888
Complete Specification Accepted, 15th Jan.,
1889
We, WILLIAM FORSTER, of Thorncliffe Lane, Chapeltown near Sheffield, Boiler
Maker, and GEORGE DAWSON, of Thorncliffe near Sheffield, Ironmaster, do hereby
declare the nature of this invention to be as follows:-
This invention relates, more especially to boilers used for heating purposes, as for
instance for heating greenhouses, conservatories, or other places of the like kind by
means of hot water. It has for its object a novel method of constructing such boilers
of wrought iron, so that they are simple, very effective, and easily removeable when
required.
The improved boiler is made of wrought iron plates of suitable thickness and size,
preferably welded together so that the boiler is formed of a single piece. Externally
it is cubical or rectangular in shape, and inside at a short distance from the four outer
sides are arranged parallel plates so as to leave a water space between them all round.
This space is closed in at the bottom edge of the boiler, whilst at the top of the
latter the inner plates do not rise quite to the top but are closed by a flat plate a short
distance below a flat plate which closes the outer side plates.
Through the inner cubical chamber thus formed two parallel midfeathers or water-
spaces are formed extending from the front to the back, their upper ends being
open and communicating with the space below the top of the boiler whilst their
lower ends are closed and extend downward for a part only of the depth of the inner
chamber. Their front and back ends are open to the water spaces between the inner
and outer chambers. An opening is made through the lower edge of the water space
at the front of the boiler.
An opening, preferably rectangular, passes through the space between the tops of
the inner and outer chambers. This opening is at the front of the boiler and com-
municates with the space between the midfeathers, and it serves to supply fuel to the
inner chamber, and two similar smaller openings are made through the space between
the tops of the chambers at the back of the boiler and communicate with the spaces
between the midfeathers and the sides of the inner chamber, and they serve as flues
for the escape of smoke and the products of combustion.

page_text: Over the front opening upon the top of the boiler is fitted a loose cast iron top
having a feed box and door for the supply of fuel, and the two flues at the back of the
boiler top are covered by a casting or box communicating with a chimney and
preferably having doors by which the flues can be cleaned.
The entire boiler is fixed upon a 'cast iron or other stand, which may be made as
ornamental as desired, and a frame and door are provided upon the boiler to the front
opening already described at its lower edge, and an opening and door are also made
in the cast iron stand for the removal of ashes.
The necessary openings for water pipes, and for supplying and drawing off the
water are fixed to the boiler.
Fuel being supplied to the interior of the boiler through the front opening at
the top, is consumed in the inner chamber by air, admitted in regulated quantity,
and heats the water in the external water spaces and midfeathers very quickly
and economically. The fire can be attended to through the door in front and the
ashes can be removed through the lower door in the stand, and the boiler when
welded in one piece as described, is strong, simple, economical and not liable to get
out of order or require repair.
It is evident that the exact shape size and proportions may be varied more or less
according to the conditions and purpose for which the boiler is to be used.
Dated this 4th day of May 1888.
EDWARDS & Co.,
35, Southampton Buildings, London,
Agents for the Applicants.

page_text: Improvements in Boilers.
We, WILLIAM FORSTER, Thorncliffe Lane, Chapeltown near Sheffield, Boiler
Maker, and GEORGE DAWSON, Thorncliffe near Sheffield, Ironmaster do hereby
declare the nature of this invention 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 more especially to boilers used for heating purposes, as for
instance for heating greenhouses, conservatories, or other places of the like kind by
means of hot water.
It has for its object a novel method of constructing such boilers of wrought
iron, so that they are simple, very effective, and easily removable when required.
The accompanying drawings are in illustration of our invention. Figure 1 is a
perspective view of a heating boiler upon a cast iron stand. Figure 2 is a view
shewing a vertical section of the boiler. Figure 3 is a front elevation, figure 4 a plan,
and figure 5 a vertical section. The same letters of reference indicate the same parts
in the several figures.
.
The improved boiler is made of plates of suitable thickness and size, preferably
welded together so that the boiler is formed of a single piece. Externally it is
cubical or rectangular in shape (as shewn in figure 1) and inside at a short distance
from the four outer vertical sides a, b, c, d are arranged parallel plates e, f g h so as
to leave a water space between them all round. This space is closed in at the
bottom edge of the boiler at i, whilst the inner plates do not rise quite to the top
but are closed by a flat plate a short distance below a flat plate n which closes
the outer side plates and forms the top of the boiler. Through the inner cubical
chamber thus formed two parallel vertical midfeathers or water spaces and mare
formed extending from the front to the back, their upper ends being open and com-
municating with the space below the top n of the boiler whilst their lower ends
are closed at o, o, and extend downward for a part only of the depth of the inner
chamber. Their front and back ends are open to the water spaces between the inner
and outer chambers. An opening is made at p through the lower edge of the water
space at the front of the boiler.
An opening preferably rectangular, passes through the spaces between the tops
of the inner and outer chambers.
This opening is at the front of the boiler into the space between the mid-
feathers and m and it serves to supply fuel to the inner chambers. Two similar
smaller openings are made through the space between the tops of the chambers at
the back of the boiler and communicate with the spaces between the midfeathers /
and m and the sides of the inner chamber, and they serve as flues for the escape of
smoke and the products of combustion.
Over the front opening r upon the top of the boiler is fitted a loose cast iron top
(figure 1) hav ng a feed box and door for the supply of fuel, and the two flues s and t

page_text: at the back of the boiler top are covered by a casting or box v (figure 1) commu-
nicating with a chimney w and preferably having doors as shewn by which the flues
can be cleaned.
The entire boiler is fixed upon a cast iron or other stand x which may be made as
ornamental as desired, and a frame and door y are provided upon the boiler to the
front opening p already described at its lower edge, and an opening and door z
are also made in the cast iron stand for the removal of ashes. The necessary
openings for water pipes, and for supplying and drawing off the water are fixed
to the boiler in any desired positions in the usual way, but are not shewn in the
drawings.
Fuel being supplied to the interior of the boiler through the front opening at the
top, is consumed in the inner chamber by air, admitted in regulated quantity, and
heats the water in the external water spaces and midfeathers very quickly and
economically.
The fire can be attended to through the door y in front and the ashes can be
removed through the lower door in the stand, and the boiler when welded in one
-piece as described and shewn, is strong, simple, economical, and not liable to get out
of order or require repair.
It is evident that the exact shape, size and proportions, may be varied more or less
according to the conditions and purpose for which the boiler is to be used, but
having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. The boiler formed of welded plates, and consisting of an external and internal
chamber, one or more hollow midfeathers or partitions, and openings for the supply
of fuel and the escape of smoke and products of combustion, substantially as described
and shewn in the drawings.
2. In combination with the boilers formed as described, the boxes and doors for the
supply of fuel and for giving access to the flues, and the stand carrying the boiler
and provided with openings and doors, substantially as described and shewn in
figure 1.
Dated this 11th day of Decembox 1000