Improvements in Apparatus for Feeding Fuel to Steam Boiler and other Furnaces.
Year: 1887

page_text: Date of Application, 20th Aug., 1887
Specification Accepted, 18th Oct., 1887
COMPLETE SPECIFICATION.
Improvements in Apparatus for Feeding Fuel to Steam Boiler and
other Furnaces.
I ABRAHAM HENTHORN STOTT of Wykeham Place Middleton Road Oldham in
the County of Lancaster Engineering Architect, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
doscribed and ascertained in and by the following statement :-
This Invention relates to improvements in apparatus for feeding fuel to steam
boiler and other furnaces by hoppers Elevators vertical cone tubes valves and other
mechanical means illustrated by drawings marked from letter A to letter H.
A Plan showing two sets of valves.
B Section longitudinal showing two sets of valves.
showing four valves.
D Section longitudinal.
E Cross section showing two valves.
Elevation showing valves worked by eccentrics.
G Feather edged slide valves half full size.
H. Circular valve half full size.
Such being the nature and object of my said Invention 1 will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect and in order that the same may be clearly understood I
have annexed hereunto four sheets of drawings illustrative thereof and have marked
the same with letters and figures of reference corresponding with those in the follow-
ing explanation thereof. At figure 1 on plans and sections marked A and B there is
shown a large coal receiving hopper fixed level with the road into which carts and
trucks can tip coal and other fuel and from the said large hopper the elevator figure 2
which is composed of iron troughs inside of which is a screw which can be made in
convenient lengths and fixed on a shaft which will work in a foot step of a certain
form shown at Figure 8 on Section B. The said trough and screw will be covered
over from letters a to b so that only a certain quantity of coal can come in contact
with the bottom or taking in end of the said screw at once the screws to be worked
by ropes and groved pullies figure 10. Plan A figure 2 on plan and section A and B

page_text: which carry the coal into the stoking hopper markod figure 3 on Plan A. The coal
is passed on by the valves figure 4 B Section which valves are so arranged to prevent
up draughts from the furnace fires and are worked by eccentrics and groved pullies
by ropes figures 9 Plan A & B.
By keeping the furnace doors as close as possible which can be done with this
arrangement of feeding the supply of air will get into the fire through the bars of
the furnace under side and thereby keep up the steam more regular and the bars
cooler by this arrangement most of the smoke will be consumed and there will be
a saving of both coal and labour.
At Figure 4 are shown the valves one open & one closed which are attached to
cone tubes figure 5 Section B which cone tubes are to be fixed vertical with a slanting
flange conductor at C. inside the cone to conduct the coal on to the hollow ball which
is to spread the coal on the fire figure 6 on Section B at or near the bottom of the
vertical cone tube there is a hollow ball figure 6 Section B which is attached by pipes
figure 7, 7 Section B to the hollow ball which pipes communicate with the water inside
the boiler so that the hollow ball will be filled constantly with water on or about the
level of the furnace flues.
Having now described the nature and object of my said invention together with
the manner in which the same is to be performed or carried into practical effect I wish
it to be understood that I claim as my invention.
Firstly I claim the general arrangement whereby I am enabled to deliver the coal
and fuel from the large hopper into and on to the fires thereby saving the labour of
having to put the coal or fuel in the hopper by hand.
Secondly I claim the screw arrangement through and shaft bearing which form the
Elevator from large hopper to stoking hopper hereinbefore described and illustrated
by which I am enabled thereby to dispense with having to lift the coal by hand
labour.
Thirdly I claim the arrangement of mechanism shown and described for delivering
coal from stoking hopper into cone tubes both single and double delivery shown at
Figure 4 and the slanting flange conductor at C. for conducting the coal on to the
hollow ball figure 6 on Section B.
Fourthly claim the arrangement of mechanism hereinbefore described and
illustrated for the hollow ball spreader and water pipes thereto for spreading the coal
on the fires.
Fifthly I claim the arrangement of the vertical cone tube for feeding in a vertical
way in lieu of horizontal through furnace doors.
Sixthly I claim the improved double feather edged horizontal slide valve for
admitting coal through the vertical feeding.
Dated the 20th day of August 1887
ABRAHAM HENTHORN STOTT.