Improvements in Boilers for Hot Water Heating Apparatus.
Year: 1896

page_text: Date of Application, 7th Feb., 1896-Accepted, 4th Apr.. 1895
COMPLETE SPECIFICATION.
Improvements in Boilers for Hot Water Heating Apparatus.
We, WILLIAM DILWORTH, Hot Water Engineer, and EDGAR CARR, Hot
Water Engineer, both of Charnley Street, Preston, in the County of Lancaster,..
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 improvements in boilers for hot water heating
apparatus the class of boilers to which our invention relates being of the horizontal
multi-tubular type.
In order that the nature of our improvements may be more readily understood.
we append a sheet of drawings of which
Fig. 1 is a cross sectional view
Fig. 2 a longitudinal view partly in section and
Fig. 3 a side view.
In the said drawings a a are water tubes "stemmed" or fastened at each end'
into sockets in the hollow end plates bb. In the arrangement shewn there are four
pairs or sets of such end plates each set being coupled up to two rows of tubes
and the several sets of end plates communicate with each other through syphon
connections c c. We employ a tubulons furnace grate having the water fire bars or
tubes d d fastened at one end into a hollow terminal or end plate e and at the other
end into the terminal plate which is so formed as to admit of the rakes or pokers
inserted through the entrance g for the purpose of cleaning and raking the fire.
The terminal plate e is in communication by means of the syphons (shewn in
broken lines at Fig. 1) with the end plate 6 immediately above it and the terminal
plate has a socket i to receive the return pipe of the hot water circulating system.
The flow pipe enters an upper socket j rising from the curved hollow water plate k
which is in communication with the uppermost of the end plates bb through the
medium of one or more syphons (shewn in broken lines at Fig. 1). The curved
water plate k has a central opening m to allow the products of combustion—which
on their upward passage impinge on the tubes a a-to find their way into a flue or
chimney n.
oo are fuel chambers having suitably formed removable lids or covers p p the
said chambers being preferably in the form shewn by broken lines at Fig. 3 where
it will be observed the opening to the chamber is relatively small but the width of
the chamber is gradually increased downwardly to the length of the fire bars d d..
We arrange the two chambers oo to slope downwardly and inwardly towards the
inner sides of the fire grate (see Fig. 1) the tubes a a decreasing in number and the
end plates 66 decreasing in width from the upper to the lower part of the stack.
of tubes accordingly.
The construction of boiler and fire grate and the arrangement of fuel chambers.
above described allows the fuel to be introduced into the furnace at the sides.
thereof. Thus the central part of the fire does not become smothered by the
ingress of the green fuel but remains at a red heat and serves to consume the sinoke
issuing on each side.
In some cases the upper water plate k may be dispensed with and a plain iron
plate or brick arch substituted in which case the socket ; for the flow pipe would
rise from the topmost of the end plates b b.

page_text: We preferably raise the floor of the fire grate centrally (as shewn at Fig. 1) so
as to obtain increased grate area.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is :-
1. The improved construction of boiler comprising a stack of horizontally
disposed tubes end plates and connections in combination with side fuel chambers
all the said parts being arranged substantially as herein described and shewn in the
drawings.
2. The combination with a boiler constructed as herein described of a tubulous
fire grate constructed and arranged substantially as described and shewn in the
drawings.
For the Applicants,
W. LLOYD WISE,
46 Lincoln's Inn Fields, Londou, W.C., Chartered Patent Agent.