Improvements in Hot Water Circulating Boilers for Heating Buildings or Boiling Liquids, and in Furnaces therefor.
Year: 1897

page_text: Date of Application, 26th Apr., 1897
Complete Specification Loft 26th Jan 1805 Accepted 23rd Anr
1898
Date of Application, 26th Apr., 1897
Complete Specification Loft, 26th Jan, 1895. Accepted, 23rd Apr 1898
IIUYIDIONAL DREIFICATION.
Improvements in Hot Water Circulating Boilers for Heating
Buildings or Boiling Liquids, and in Furnaces therefor.
I, ROBERT RENTON GIBBS, of 22, Elgin Drive, Egremont, in the County of
Chester, Engineer, do hereby declare the nature of this invention to be as
follows:
This invention has for its object certain improvements in hot water circulating
boilers for heating buildings or boiling liquids of the kind set forth in the Speci-
fication of my previous Patent, No. 12613, dated July 8th, 1892. My present
invention is a boiler of the kind used for high pressure heating apparatus, and is
in common with my patent aforesaid, a sectional boiler, that is one having its
heating surfaces built up of one or more sections consisting of water tubes bent
into a zig-zag form, which are usually of standard dimensions, just so many
sections being used as the work to be done may require. Furthermore, all joints
are outside the boiler, not under the action of the heat and flame, and where more-
over they can be seen, and are accessible for repairs.
My present invention comprises the following improvements:-
-
1. It has no water or other fire bars, but has instead a slow combustion hearth
formed of fire brick, the sole of the hearth being made up of two layers so that
the wearing or upper surface can be renewed without disturbing the lower one
supporting it;
2. The sections are formed of iron or other metallic tubes having their junctions
outside the furnace away from the action of the heat and flame.
The tubes forming each section are bent in a zig-zag form and are located in
flues in the path of the flames and hot combustion gases.
The arrangement is
such that any or all of the sections or sub-sections can be withdrawn from the front
of the boiler without disturbing the others and without having to take down much
brickwork, the removal of the brickwork necessary to allow the removing of any
section or sub-section having been by the present invention reduced to a minimum;
3. An arrangement or device for keeping the pipes in the boiler always fully
charged with water, consisting of a strong metallic bottle closed at its lower end
(where it communicates with the pipes) by means of a cock, and at the upper end
with a screw or other cap. This water bottle is supplied with water by unscrewing
the cap at the top and filling by hand or otherwise, after which the cap is replaced,
and to insure the pipes not getting empty, all that is necessary is to open the cock
and the water in the bottle will serve as a reserve supply. The pipes are thus
kept charged with water, the cap at top meantime closing the bottle at that point.
This device forms a reverse supply of water for the pipes and prevents the pipes
getting empty accidentally;
4. Preventing damage to the boiler from the connecting pipes being frozen, by
fixing close to the boiler a relief valve, having a disc of lead or other suitable
metal, instead of the usual conical seat, and having the pressure regulated by

page_text: preference, by a spring and screw and secured from foul play by being locked in
any convenient manner.
5. I provide an opening direct from the combustion chamber into the smoke
stack, and also an opening into a flue over the combustion chamber, which returns
towards the front of the furnace, where it descends to a flue below the combustion
chamber which communicates with the smoke stack by an opening at the lower
part. The opening direct from the combustion chamber into the smoke stack is
fitted with a damper so that when first lighting up the fire this damper is opened,
and the smoke can escape direct into the smoke stack until sufficient heat and
draught are developed to draw the products of combustion downwards, when I
close the damper communicating directly with the fire, and the flames and gases
then pass along the upper flue, then descend into the lower flue and so to the
chimney. In these flues are located the water tubes aforesaid in the direct path
of the flames and hot combustion gases, each set of tubes being joined by pipes on
the outside of the boiler. The furnace is also constructed with hollow conduits
through which air is passed if necessary for complete combustion, and after it has
become highly heated by contact with the red hot brickwork of the furnace, I
admit this air preferably at a point where the flames and hot gases pass from the
combustion chamber into the upper flue. Here it meets with the escaping carbonic
oxides and supplies the necessary molecule of oxygen at a temperature sufficiently
high for chemical combination. These conduits pass from the furnace front to the
back, then upwards over the top of the fire, next to the red hot brickwork of the
furnace, and then from front to back again along a conduit to the top over the top
flue, finally delivering the air at a point above indicated. Suitable doors may be
provided for cleaning out the flues and pipes.
Datalabi ouL 1
1 1007
WM. P. THOMPSON & Co.,
Of G, Lord Street, Liverpool, Patent Agents for the Applicant.
Improvements in Hot Water Circulating Boilers for Heating
Buildings or Boiling Liquids, and in Furnaces therefor.
I, ROBERT RENTON GIBBS, of 22, Elgin Drive, Egremont, in the County of
Chester, Engineer, 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 has for its object certain improvements in hot water circulating
boilers for heating buildings or boiling liquids of the kind set forth in the Speci-
fication of my previous Patent, No. 12613, dated July 8th, 1892. My present
invention is a boiler of the kind used for high pressure heating apparatus, and is
in common with my patent aforesaid, a sectional boiler, that is one having its
heating surfaces built up of one or more sections consisting of water tubes bent
into a zigzag form, which are usually of standard dimensions, just so many
sections being used as the work to be done may require. Furthermore, all joints
are outside the boiler, no. under the action of the heat and flame, and where more-
over they can be seen, and are accessible for repairs.
Referring to the accompanying drawings,
Figure 1 is a longitudinal section of a boiler and furnace constructed according
to my invention;
Figure 2 a vertical section thereof, the one half on the left hand side being on

page_text: the line and the other half on the line y-y. Figure 3 a front elevation and
Figure 4 a sectional plan.
Figure 5 is an elevation of a device for keeping the pipes in the boiler always
fully charged with water and Figure 6 a full sized sectional view of an improved
relief valve.
It will be observed that the furnace or combustion chamber A of this boiler has
no water or other fire bars, but has instead a slow combustion hearth formed of
fire brick, the sole B of the hearth being made up of two layers so that the wearing
or upper surface can be renewed without disturbing the lower one supporting it;
The sections of the boiler are formed of iron or other metallic tubes C having
their junctions D outside the furnace away from the action of the heat and flame.
The tubes forming each section are bent in a zig-zag form and are located in
flues hereinafter referred to in the path of the flames and hot combustion gases.
The arrangement being such that any or all of the sections or subsections can be
withdrawn from the front of the boiler without disturbing the others and without
having to take down much brickwork, the removal of the brickwork necessary
to allow the removing of any section or sub-section having been by the present
invention reduced to a minimum;
Figure 5 shows an arrangement or device for keeping the pipes C in the boiler
always fully charged with water, consisting of a strong metallic bottle E closed at
its lower end (where it communicates with the circulating pipe C) by means of a
cock F, and at the upper end with a screw or other cap G. This water bottle is
supplied with water by unscrewing the cap at the top and filling by hand or
otherwise, after which the cap is replaced, and to insure the pipes not getting
empty, all that is necessary is to open the cock F and the water in the bottle will
serve as a reserve supply. The pipes are thus kept charged with water, the cap at
top meantime closing the bottle at that point. This device forms a reserve supply
of water for the pipes and prevents the pipes getting empty accidentally;
In order to prevent damage to the boiler from the connecting pipes being frozen,
I fix close to the boiler a relief valve, such as shown in Figure 6, having a disc H
of lead or other suitable metal, instead of the usual conical seat, and having the
pressure regulated by preference by a spring I and screw J and secured from foul
play by being locked in any convenient manner. In the drawing it is shown
secured by a Yale lock and a lock nut K. At the top of the valve are a series of
holes L for the escape of steam.
Referring to Figures 1 to 4, I provide an opening M direct from the combustion
chamber A into the smoke stack N and also an opening O into the flue P over the
combustion chamber A which flue returns towards the front of the furnace, where
it descends by a passage Q to a flue R below the combustion chamber which flue
communicates with the smoke stack by an opening S at the lower part. The
opening M direct from the combustion chamber into the smoke stack is fitted
with a damper T so that when first lighting up the fire this damper is opened, and
the smoke can escape direct into the smoke stack until sufficient heat and draught
are developed to draw the products of combustion downwards, when I close the
damper communicating directly with the fire, and the flames and gases then pass
as indicated by the arrows along the upper flue P then descend along the passage Q
into the lower flue R and so to the chimney. In these flues are located the water
tubes C aforesaid in the direct path of the flames and hot combustion gases, each
set of tubes being joined by pipes C on the outside of the boiler. The furnace is
also constructed with hollow conduits U through which atmospheric air is passed
if necessary for complete combustion, and after it has become highly heated by
contact with the red hot brickwork of the furnace, is admitted at a point where it
meets the flames and hot gases passing from the combustion chamber A into the
upper flue P as indicated by the feathered arrows. Here it meets with the
escaping carbonic oxide and supplies the necessary oxygen at a temperature suffi-
ciently high for chemical combination. These conduits which are in the form of

page_text: an S pass from the furnace front to the back,-then-upwards, near to the red hot
brickwork-of-the-furnace, and then towards the front of the furnace, again in an
upward direction as at U₁ to the top over the top flue, P finally delivering the
air at a point above indicated. Suitable doors W may be provided for cleaning
out the flues and pipes, X are the inlets for atmospheric air, Y a balanced furnace
door and Z an ordinary damper. The ends of pipes C are connected with the
circulating system.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. The improvement in hot water circulating boilers which consists in the com-
bination of a slow combustion or coking chamber without fire bars a series of
flues containing the water pipes and a hot air supply entering the flues near the
point where the products of slow combustion enter said flues.
2. The arrangement of pipes and flues substantially as herein described whereby
the joints of the pipes are open for inspection the pipes can be withdrawn with the
minimum damage to brick work and the fire can be turned on direct to the chimney
when first lit and the direct passage closed when a sufficient draft is obtained.
3. The arrangement for holding an extra supply of water and thus keeping
the pipes full substantially as set forth in connection with Figure 5.
4th. The arrangement of relief valve substantially as and for the purposes
described in relation to Figure 6.
OF
1
f
1000
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool, Manchester, Birmingham, and London.