Improvements in the Construction of Steam Boilers for, and the Method of Applying, Forced Draught.
Year: 1893

page_text: Date of Application, 3rd Mar., 1893-Accepted, 22nd Apr.. 1893
COMPLETE SPECIFICATION.
Improvements in the Construction of Steam Boilers for, and the
Method of Applying, Forced Draught.
I, JOHN PARTINGTON, of Water Lane Boiler Works, Thornton Road, Bradford,
in the County of York, Boilermaker, 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:-
My improved method of applying forced draught to horizontal or vertical boilers
is as follows:-Across, and about the middle and front of the furnace, 1 have a
horizontal pipe or water tube, each end being riveted, welded, expanded or screwed
to the inside of the furnace. At any desired distance from the front of the furnace
I have a water pocket or box, riveted, welded, or bolted to the top of the furnace,
the bottom coming down about two thirds and straight across. To the front side
of the water box, I have a row of water tubes, placed horizontally, leading down
and into the front water tube or pipe, the ends that go into the tube or pipe, being
lower than the ends in the water box, for the purpose of circulation.
At the bottom of the water box I build an arch of firebrick for protection. In
place of the water box, I can build an arch, or partition, and place the water
tubes across the furnace, welding, riveting expanding or screwing same in. At the
front end of the furnace I have one, two, or more inlets, below the cross water
pipe, through which I can force a blast of air or a jet of steam. Underneath these
inlets for air or steam, I have a door, which is at the bottom of the furnace, and
through which clinkers or ashes may be withdrawn, or where coal can be thrown
in. At the top of the furnace and above the water tube, I have another door,
which can be closed or kept open at pleasure-through this top door the coal is
thrown in, falling on the top of, and between, the water tubes, into the space below,
filling it up so that when the furnace or fire is lit from the bottom, and the blast
comes in through the openings or nozzles in the front, and underneath the tubes,
the coal is thoroughly ignited from the bottom, giving out great heat, and as fresh
fuel is passed in through the upper door, it meets the heat, and the smoke and
gases generated pass through the fire, owing to the blast, and are burnt or ignited,
thus giving perfect combustion.
The drawings annexed show, in Fig. 1. a sectional view of the front end of a
horizontal boiler furnace the arrangement for a vertical boiler with a horizontal
furnace being the same. A. is the water tube at the front of the boiler, B. is the
water box or pocket, C. are the water tubes connecting the water tube A. and
the pocket B. together-D. is a section of the firebrick arch, E. is the entrance
for the forced draught or steam jet-F. is the bottom coal door-G. is the top
coal door-H. the new coal, and I. the ignited coal.
Fig. 2. shows the water pocket B. shown in section at B. Fig. 1. and also the
horizontal tubes C. and the firebrick arch D.
Fig. 3. shows the water tube across the furnace shown in section at A. Fig. 1.
E. E. are two inlets for air or steam blast. F. is the bottom coal door and G the
top door, J. is the space between the water tubes C. Fig. 1.
Fig. 4 shows the tubes C. across the furnace, with a brick arch K. in place of
the water pocket B. Fig. 1., the inlets for forced draught or blast, E., and position
of coal, being the same as shown in Fig. 1.

page_text: Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved steam boiler for forced draught or blast, or steam jet, substan-
tially as described and shown in drawings.
2. The improved method of applying forced draught or blast or steam jet to
steam boilers substantially as described and shown in drawings.
3. In steam boilers for forced draught or blast, the water tube A. and water
box B., connected together by tubes, substantially as described and shown in
drawings.
4. In steam boilers the position of the inlet, or inlets for the admission of forced
draught or steam jet or blast, as described and shown in drawings.
5. The method substantially as described, of feeding boilers with fresh fuel
through the upper door G., the fuel falling on the top of, and between the water
tubes C.
6. The placing of a firebrick arch underneath the water box B., substantially as
described and shown in drawings.
Dated this 3rd day of March 1893.
E. E. WIGZELL,
Agent for Applicant.