Improvements in Stoking Boilers and Apparatus connected therewith.
Year: 1889

page_text: Late of Application, 17th Sept., 1889
Complete Specification Left. 10th May, 1890-Accepted, 5th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Stoking Boilers and Apparatus connected
therewith.
We GILBERT LITTLE and JOHN JAMES STEVENSON 3 Great Saint Helens E.C.
Engineers, do hereby declare the nature of this invention to be as follows:-
This invention relates to improved means for automatically stoking the hoppers
of mechanical stokers.
Hitherto the stoking has been done by the firemen lifting the coal with shovels
and throwing it from the stoke-hole into the hoppers of the mecbanical stokers.
The object of the present invention is to effect the feeding of the hoppers of the
mechanical stokers by utilizing a spiral worm or other form of screw or band
conveyor. To this end we construct a coal hopper or storage tank in the stoke-hole
or any other suitable place and by means of adjustable outlets and a special shaped
worm trough the supply of coal is allowed to fall from the storage hopper into the
conveyor which carries the coal to an elevator or shoots. The coal as discharged from
the elevators or shoots enters another conveyor which distributes it into the hoppers
of the mechanical stokers; the supply of coal to each hopper being regulated by
means of a circular rack and tooth wheel, instead of an ordinary flat rack and wheel
as hertofore used. This combination of storage hopper, shoots, elevator, conveyors,
circular rack and tooth wheels greatly facilitates the operation to be performed, and
reduces the cost of labour, as the fuel is thereby automatically, yet intermittently or
uniformly fed into the hoppers and furnaces.
Dated this 16th day of September 1889.
GILBERT LITTLE.
JOHN J. STEVENSON.
COMPLETE SPECIFICATION.
Improvements in Stoking Boilers and Apparatus connected
therewith.
We GILBERT LITTLE and JOHN JAMES STEVENSON 1 Metal Exchange Buildings
Leadenhall Street in the County of London Engineers 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 relates to improved means for automatically stoking the hoppers of
mechanical stokers. Hitherto the stoking has been done by the firemen lifting the
coal with shovels and throwing it from the stokehold into the hoppers of the
mechanical stokers. The object of the present invention, is to effect the feeding of
the hoppers of the mechanical stokers, by utilizing a strong spiral worm or other
form of screw or band conveyor. To this end we construct a coal hopper or storage
bin in the stokhold, or any other suitable place, with the bottom wedge-shaped or
inclined. at any suitable angle. In the bottom of the coal hopper or storage bin.
outlets, shutes, doors, or openings are provided through which the coals fall until
arrested by the conveyor. The said outlets, shutes, doors, or openings are arranged
so that the coal as it falls out, slides into the bottom, or side, of the conveyor; and
the tops of the said outlets, shutes, doors, or openings are kept sufficiently low to
prevent the coal from rising over the top of the conveyor casing or trough. This
combination of coal hopper or storage bin with outlets, shutes, doors, or openings,
prevents the weight of the coal in the coal hopper or storage bin from pressing upon
the conveyor. The coal as it falls into the conveyor, is carried to a shute or elevator,

page_text: and passes into another conveyor which distributes into each of the hoppers of the
mechanical stokers, thereby reducing the cost of labour.
In order that our invention may be clearly understood we will describe the same
more fully with reference to the accompanying drawing.
Fig. 1 represents a view looking on the front of the boilers. Fig. 2 shows a plan
of the boilers and coal hopper or storage bin, and Fig. 3 is an end view of the boilers
and coal hopper or storage bin. Fig. 4 shows the outlets, shutes, doors, or openings,
and the conveyor.
In the said Figs. 1. 2. 3 & 4 "a is the coal hopper or storage
bin. "6" the conveyor, and "c" the outlets, shutes, doors, or openings.
"
Having now described the nature and object of our said invention, together with
the manner in which same is to be, or may be carried into practical effect, we wish it
to be understood that we claim as our invention the following viz.,
The combination of the coal hopper or storage bin with inclined bottom, outlets,
shutes, doors, or openings and conveyor, designed to act substantially as and for the
purposes set-forth and indicated.
GILBERT LITTLE.
JOHN STEVENSON.