Improvements in Hot-water Boilers.
Year: 1894

page_text: Date of Application, 10th Oct., 1894
Complete Specification Left, 10th July, 1895-Accepted, 10th Aug., 1895
Improvements in Hot-water Boilers.
I, JAMES KEITII, Assoc. M. Inst. C.E. of 57 Holborn Viaduct, in the City of
London, Gas, Hydraulic, Heating and Ventilating Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention has for its object the construction of hot water boilers for heating
and circulating water with a large area of heating surface in proportion to the
grate area whilst providing for increased circulation and convenient access for
removal of deposit in the bottom and other parts of the boiler.
The improved boiler which may be made in a piece in cast iron but which is
preferably made of wrought iron is composed of an inner and an outer shell forming
a water jacket enclosing a fire grate and combustion chamber the shell parts being
welded or riveted together when made of wrought iron. The boiler proper is of
dome-topped cylindrical shape and stands vertically over a hollow base piece
constituting an ash box an annular brick lined ring being interposed between the
fire grate on the base and the boiler. The firing doorway and an outlet for the fire
gases are formed preferably in the dome and on opposite sides near the upper end
of the boiler, and a clinker door in the brick lined ring forming the fire place.
Extending across the combustion chamber is a water tube or two or more such
tubes connecting opposite sides of the water jacket; and being in or directly over
the fire the tube or tubes absorb a large amount of the heat and facilitate internal
combustion.
Flow and return pipes are connected to flanges at the top and bottom
respectively of the boiler, and openings, closed by suitable doors, are formed in the
outer shell opposite the water tube or tubes, around the lower part, and in the top
of the boiler to give access for cleaning out sediment deposited on the heating
surfaces and any matter that may accumulate in the lower part of the boiler.
Dated thie 9th day of October 1894
COMPLETE SPECIFICATION.
Improvements in Hot-water Boilers.
1, JAMES KEITH, Assoc. M. Inst. C.E., of 57 Holborn Viaduct, in the City of
London, Gas, Hydraulic, Heating and Ventilating 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 the construction of hot water boilers for heating
and circulating water with a large area of heating surface in proportion to the
grate area whilst providing for increased circulation and convenient access for
removal of deposit in the bottom and other parts of the boiler.
The invention is illustrated by the accompanying drawings,
Figure 1 being a vertical section of the boiler, Figure 2 a horizontal section of
same on the line -y and Figure 3 a plan of Figure 1.

page_text: Figure 4 is a part vertical section, and Figure 5 a front elevation of the improved.
boiler, whilst Figure 6 is a section similar to Figure 2, but shewing a modification
of the boiler.
The improved boiler which may be made in a piece in cast iron but which is
preferably inade of wrought iron is composed of an inner and' an outer shell A
and B respectively forming a water jacket C enclosing a fire grate C' and
combustion chamber D the shell parts being welded or rivetted together when
made of wrought iron. The boiler proper is of dome-topped cylindrical shape and
stands vertically over a hollow base piece E constituting an ash box, an annular
brick-lined ring F being interposed between the fire grate on the base and the
boiler. The firing doorway G and an outlet G' for the fire gases are formed
preferably in the dome H and on opposite sides near the upper end of the boiler,
and a clinker door I in the brick-lined ring forming the fire place. Extending
across the combustion chamber D is a water tube J as shewn at Figure 2' or two or
more such tubes J as shewn at Figure 6 connecting opposite sides of the water
jacket C and being in or directly over the fire the tube or tubes J absorb a large
amount of the heat and facilitate internal circulation.
Flow pipes K and return pipes L are connected to flanges M, N, at the top and
botton respectively of the boiler, and openings ○ closed by suitable doors are.
formed in the outer shell opposite the water tube or tubes J, and around the lower
part, and at P in the top of the boiler to give access for cleaning out sediment
deposited on the heating surfaces and any matter that may accumulate in the lower
part of boiler..
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 :-
A. hot water, boiler constructed substantially as hereinbefore described with
reference to the drawings annexed.
CTI 1008
efcrence to the drawings annexed.
Dated this 9th day of July 1995,
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 St. Vincent Street, Glasgow, Agent for the Applicant.