IMPROVEMENTS IN BOILERS FOR HOT WATER HEATING APPARATUS ALSO APPLICABLE TO STEAM BOILERS to be as follows:
Year: 1884

page_text: I, JOHN CORBETT, of Corporation Road, Carlisle, in the county of Cumberland,
Hot Water Engineer do hereby declare the nature of the said invention for
"IMPROVEMENTS IN BOILERS FOR HOT WATER HEATING APPARATUS ALSO APPLICABLE
TO STEAM BOILERS to be as follows:-
"
This invention relates to improvements in the fire bars and fire doors of boilers
for hot water heating apparatus and of steam boilers the object of the invention
being to facilitate the heating or increase the heating power of such boilers to
prevent the accumulation of clinkers and to afford facility for readily taking out a
defective bar when necessary and replacing it without disturbing the remainder of
the bars. The invention is more particularly applicable to boilers for hot water
heating apparatus.
In carrying out my invention I form the back of the boiler with an extended
deep water space and the front of the boiler is provided with a water chamber
having a moveable lid fixed to the said chamber by means of screw bolts and
nuts. A series of wrought iron hydraulic tubes forming the tire bars are screwed
into the extended water space at the back of the boiler and are connected to the
water chamber at the front of the boiler by means of hollow shoulder nuts.
The fire doors are constructed so that they can slide on the bevelled dead plate
which is extended forwards for this purpose and fitted to the water chamber the
ash pit door being below the same.
By my improvements I obtain a great increase of heating power as the supply
and return water is continually flowing through the tubular bars which are exposed
to the most intense heat of the fire.
There is also the advantage of cleanliness as the fire bars will not become red
hot, thereby preventing accumulation of clinkers or dross which on ordinary
fire bars is so difficult to remove and prevents the free combustion of the fuel.
I also effect considerable economy as the fuel is thoroughly consumed the fire
bars will not get out of shape and will last very much longer than ordinary bars,
and they are arranged in such a manner that should a bar become defective it can

page_text: be taken out and replaced by a new one without disturbing the rest of the bars,
the boiler or the brick work and at a very moderate cost.
When the boiler is banked up with fuel to last during the night the tubular fire
bars will still receive heat from the fire, whereas in existing boilers the dend fuel
placed on the top of the fire prevents this thus causing a loss of heat in the
circulating pipes, which heat it is most important they should have, especially at
night time when frost is severe.

page_text: COMPLETE SPECIFICATION.
I JOHN CORBETT of Corporation Road, Carlisle, in the county of Cumberland,
Hot Water Engineer do hereby declare the nature of the said invention for
"IMPROVEMENTS IN BOILERS FOR HOT WATER HEATING APPARATUS ALSO APPLICABLE
TO STEAM BOILERS and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
31
This invention relates to improvements in the fire bars and fire doors of boilers
for hot water heating apparatus and of steam boilers the object of the invention
being to facilitate the heating or increase the heating power of such boilers, to
prevent the accumulation of clinkers and to afford facility for readily taking out a
defective bar when necessary, and replacing it without disturbing the remainder of
the bars. The invention is more particularly applicable to boilers for hot water
heating apparatus.
In carrying out my invention I form the back of the boiler with an extended
deep water space and the front of the boiler is provided with a water chamber
having a moveable lid or cover fixed to the said chamber by means of screw set
bolts. A series of wrought iron hydraulic tubes forming the fire bars are screwed
into the extended water space at the back of the boiler and are connected to the
water chamber at the front of the boiler by means of hollow shoulder nuts.
The fire doors are preferably constructed so that they can slide on or against the
bevelled dead plate which is extended forwards for this purpose and fitted to the
water chamber, the ash pit door being below the same.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 represents a
longitudinal section of a boiler for hot water heating apparatus constructed
according to my invention and figure 2 is a horizontal section on line A, B of
figure 1. Similar letters in both the figures represent similar parts.
a, b, and c represent the boiler of ordinary construction, except that the back
part c, thereof is extended downwards as shown in figure 1, thereby forming an
extended water space; d, is the water chamber which I provide at the front of the
boiler and e, is the moveable cover thereof fixed to the chamber d, by screw set
bolts f; g, g, g, are the hydraulic tubes forming the fire bars which tubes g, are
screwed at ht, into the extended water space at the back c, of the boiler and pass
into the water chamber d, to which they are connected by means of hollow
shoulder nuts i, so as to form a communication between the chamber d and the
back c, of the boiler; i, j, are the inlets to the chamber d, to which inlets the flow
pipes returning from the various parts of the building are attached; k; is a pipe at
the top of the boiler to which pipe the flow pipes are attached for conveying tho
hot water to the various parts of the building; l, is the dead plate which is
extended forwards from the furnace as shown over the water chamber d, to which
it is fitted; m, m, are the fire doors which are preferably constructed as shewn Bo
that they can slide on or against the dead plate l; n, figure 1 shews one of the
ash pit doors constructed in a similar manner; o, is the flue of the boiler.

page_text: By this construction the heated water in the boiler a, b, c, will be caused to flow
out through the exit pipe k, at the top of the boiler and after passing to the
various parts of the building to be heated will return in a cool state through the
inlets,j, into the chamber d, and will thence pass through the hollow fire
bars g, g, and will thereby become heated to a great extent before again entering
the boiler at h.
By my improvements I obtain a great increase of heating power as the supply
and return water is continually flowing through the tubular bars g which aro
exposed to the most intense heat of the fire.
There is also the advantage of cleanliness as the fire bars g will not become red
hot thereby preventing accumulation of clinkers or dross which on ordinary
fire bars is so difficult to remove and prevents the free combustion of the fuel.
I also effect considerable economy; as the fuel is thoroughly consumed the fire
bars will not get out of shape and will last very much longer than ordinary bars
and, by being fitted in the manner shown and described, a bar can, should it become
defective, be taken out and replaced by a new one without disturbing the rest of
the bars, the boiler or the brickwork and at a very, moderate cost.
1
1
When the boiler is banked up with fuel to last during the night the tubular fire
bars will still receive heat from the fire, whereas in existing boilers the dead fuel
placed on the top of the fire prevents this, thus causing a loss of heat in the
circulating pipes, which heat it is most important they should have, especially at
night time when frost is severe.
Although I have described my improved arrangement of waterway bars as
applied to a boiler for hot water heating apparatus it will be obvious that it is
equally applicable to other kinds of boilers.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that what I claim is
1. The combination with a boiler extending downwardly at the back, of a series
of tubular fire bars forming communication between the said extension and a water
chamber at the front of the boiler the whole being arranged substantially as and
for the purposes herein before described.
2. The improved boiler for hot water heating apparatus hereinbefore described
and represented in the accompanying drawing.