Improvements in Hot Water Boilers and the like.
Year: 1893

page_text: Date of Application, 4th Jan., 1893
Complete Specification Left, 4th Oct., 1893—Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Hot Water Boilers and the like.
I, CHARLES Whitfield of Melton Street, Kettering, in the County of
Northampton, Engineer, do hereby declare the nature of my said invention to be as
follows:-
:-
My invention consists of a boiler for supplying hot water, say to a system of hot
water heating apparatus or for supplying hot water for cooking and other purposes
characterised by its rapid heating properties.
In accordance with my invention I construct the boiler with the usual outer shell
and fit it with an inner shell to form a fuel feeding chamber or fire box leaving a
water space between said shells. The lower end of the fuel chamber or fire box
widens out and is fitted with a grate or set of fire bars whilst the upper end passes
up to the top of the boiler and is enclosed by a cover or lid.
From the widened out portion and extending upwards through the water space
aforesaid is a series of tubes or pipes which are arranged around the fuel feeding
chamber and terminate in a suitable smoke box at the top of the boiler leading
into the chimney or flue.
Fuel is supplied to the fuel chamber by removing the cover aforesaid which as it
is consumed gravitates on to the grate below after the manner of a slow combustion
stove, the products of combustion passing up the tubes in the water space to the
smoke box.
I have found that this construction of boiler is very effective for rapidly
heating water for the purposes aforesaid and is equally applicable for generating
steam.
The improved boiler is provided with the usual fittings and in some cases with
a door in the side of the boiler for supplying the fuel.
The peculiar feature of my improved boiler or water heater is the fire box
which forms a combustion chamber for the smoke and also a hopper for storing a
supply of fuel.
Dated this 3rd day of January 1893
JOHN G. WILSON & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Hot Water Boilers and the like.
1, CHARLES WHITFIELD of Melton Street Kettering in the County of
Northampton, Engineer, do hereby declare the nature of my said invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention consists of a boiler for supplying hot water, say to a system of
hot water beating apparatus or for supplying hot water for cooking and other
purposes, characterised by its rapid heating properties.
In accordance with my invention I construct the boiler with the usual outer
shell and fit it with an inner shell to form a fuel feeding chamber and fire box,
leaving a water space between said shells. The lower end of the fuel chamber
widens out and forms a fire box and is fitted with a grate or set of fire bars whilst
the upper end of the fuel chamber passes up to the top of the boiler and is enclosed
by a cover or lid. From the widened out portion of the fuel chamber forming the
fire box before mentioned, a series of tubes ascend encircling the fuel chamber and
pass out through the top of the boiler into a suitable smoke box. The arrangement
LD

page_text: of these tubes in connection with the fuel chamber and fire box forms the special
feature of my invention.
And in order that my said invention shall be the more readily understood and
carried into practical effect, I have hereunto annexed a sheet of drawings and will
now proceed to describe the same with the assistance of the various figures and
letters of reference marked thereon.
Fig. 1 is a vertical section of a circulating hot water boiler constructed in
accordance with my invention. Fig. 2 is a vertical section. Fig. 3 a sectional plan
on line a-b and Fig. 4 a plan of a modification of my improved boiler arranged
as a steam generator.
In Fig. 1. A is the outer shell of the boiler and B the inner shell whereof the
upper portion as far as 1 forms a fuel feeding chamber closed with an air tight
cover X and the lower portion from 1 to 2 the fire box or combustion chamber.
The space between the inner and outer casing forms the water space through which
the circulation water passes having ingress and egress by means of the socketed
nozzles C and D. E, E are a series of tubes encircling the feeding chamber
through which the flame and heated products, of combustion pass to a smoke
box F, F arranged on the top of the boiler. The general combination and arrange-
ment of this boiler and especially the tubes E in combination with the combustion
chamber I find gives a very high heating effect and has many practical advantages.
The fuel is fed into the fuel chamber in a convenient manner from the top by
removing the cover X where it gradually descends onto the fire bars 3 and thus
acts as a self feeding hopper. The combustion on the grate takes place mainly
under the tubes E and the natural angle formed by the fuel as it falls to supply the
loss leaves a combustion space under the tubes as illustrated by the dotted lines
which I find conduces to very efficient heating.
In carrying out my invention in the construction of a steam generator I follow
the same general arrangement of fire box and tubes but by reference, to Figs. 2. 3.
and 4 it will be noticed that I modify the fuel feeding arrangement of Fig. 1 and
by enlarging it form it into a combustion chamber, and fit it with a fire door G for
hand firing in the usual manner. I also provide a door G¹ for cleaning out the
clinker. The top part of the combustion chamber finishes as an up-take H and
the outer shell of the boiler is continued upwards in a like manner and so forms a
steam space. The smoke box F surrounds the steam space and is connected to the
chimney by a side flue F¹. The uptake can be controlled with a damper I so that
on starting the boiler, the products of combustion may pass away, both by the tubes E
and the uptake H but when desirable the whole of the products may be diverted
through the tubes by closing the damper I. A second damper I¹ is also fitted
into the chimney to regulate the working of the boiler. It will be obvious that
what I have described as a combustion chamber in Fig. 2 would act as a fuel
feeding chamber when the damper I is closed but the fuel would be fed in through
the door G. I have found this arrangement of boiler give very good results in
practice and the plan of diverting the products of combustion at will either by the
uptake H for raising of the fire or by the tubes E with the combustion chamber
acting as a feed box for slow and continuous steaming, very convenient. The
boiler is simple in construction, easily inspected and cleaned and easily retubed.
Having thus particularly described and ascertained the nature of my said inven-
tion together with the best method with which I am acquainted for carrying
the same into practical effect, I wish it to be understood that I do not confine
myself to the precise details, relative proportions or dimensions of the several
parts as the same may be considerably varied without departing from the invention,
but what I claim is.-
1st. In a circulating or hot water boiler, forming the upper part and the inner
shell into a self-feeding chamber opening out at its lower end into a combustion
chamber in combination with the tubes E when mounted and operating substantially
as hereinbefore described and illustrated on the accompanying drawing.

page_text: 2nd. In a steam generator the hereinbefore described self-feeding fire box and
combustion chamber in combination with the tubes E, side flue F uptake H,
dampers I and I when mounted and operating substantially as hereinbefore
described and illustrated on the accompanying drawing.
Dated this 3rd day of October 1893.
JOHN G. WILSON & Co.,
Agents.