Improvements in Self-stoking Apparatus for Steam Boiler Furnaces.
Year: 1898

page_text: Date of Application, 8th June, 1898
Complete Specification Left, 9th Nov, 1898-Accepted, 7th Jan., 1899
PROVISIONAL SPECIFICATION.
Improvements in Self-stoking Apparatus for Steam Boiler Furnaces.
I, PERCY GRATRIX BALDWIN, of Clark Bridge Mills, Halifax, in the County of
York, Worsted Spinner, do hereby declare the nature of this invention to be as
follows.
-
My improvements consist in a new arrangement and combination of mechanism
comprising a self-acting stoker for feeding or supplying small coal to the furnaces
of steam boilers, the mechanism I employ for this purpose consists of any form
of hopper for receiving the fuel At or near the bottom of this hopper, is a hori-
zontal shaft provided with one or more recesses, pockets, or buckets made to rotate,
in doing which, the buckets are filled with small coal, and dropped into a small
hopper or on to a plate arranged under each bucket, which coal is blown or forced
into the furnace by a jet of steam; the distance which the coal 18 thrown into
the furnace being determined or regulated by the valve admitting the steam.
The jet or jets of steam may be employed in combination with other forms of
mechanism for throwing fuel into the furnace.
Instead of blowing or forcing the coal into the furnace by a jet of steam, the
said coal may be forced by a jet of cold or hot air under pressure
By means of my invention small coal can be used for "stoking" thus effecting
a saving in cost whilst at the same time the smoke arising from the coal is
consumed
Dated this 7th day of June 1898.
Improvements in Self-stoking Apparatus for Steam Boiler Furnaces.
I, PERCY GRATRIX BALDWIN, of Clark Bridge Mills, Halifax, in the County of
York, Woisted Spinner, do hereby declare the nature of this invention and in what
manner the same 18 to be performed, to be particularly described and ascertained
in and by the following statement.-
My improvements consist in a new arrangement and combination of mechanism
comprising a self-acting stoker for feeding or supplying small coal to the furnaces
of steam boilers; the mechanism I emplov for this purpose consists of any form
of hopper for receiving the fuel Within this hopper, 18 a horizontal shaft, carry-
ing bosses provided with one or more recesses, pockets, or buckets made to rotate,
PR11

page_text: in doing which, the buckets are filled with small coal, and dropped into a small
hoppe o outo a plate arranged under the buckets, which coal is blown or forced
into the furnace by a jet of steam, the distance which the coal is thrown into the
furnace being determined or regulated by the valve admitting the steam
In order that my improvements may be more fully understood, I will make
icference to the accompanying sheet of drawings illustrative thereof, wherein
Fig 118 front elevation of portion of a one or two flued steam boiler having
my improvements applied thereto, and Fig 2 is a section of same taken through
the line a, b Fig. 4 is section through line c, d, of Fig. 2 Fig 5 is plan
view of Fig 4, and Fig 6 another plan view of Fig 4 having the plate A removed
B represents the front of a steam boiler, C the flue provided with grate bars D,
and a furnace door I, all arranged in the ordinary manner. Fis an ordinary
form of hopper for receiving the fuel, and G 18 a box on chamber through which
passes a horizontal shaft H caused to rotate intermittingly by ratchet wheel I and
catch or pawl J connected to a lever L which lever is operated by rod M from
any suitable source, whereby intermittent motion is imparted to the horizontal
shaft H Upon the shaft H are mounted any suitable number of bosses N pro-
vided with recesses of pockets e as shewn in detail Fig 3. These bosses N are
fixed upon the shaft H, and the said pockets e are equidistant from each other, so
that they deliver the coal at regular intervals and times apart, and they can be
made to empty themselves sooner or later according to the speed of the shaft H,
such speed of said shaft being determined by the number of teeth taken up in the
ratchet wheel I by pawl J
The fuel which is preferably small, is supplied to the hopper by the workman
or in any other suitable manner, the said fuel resting upon the upper plate A,
and as the shaft H evolves, the pockets in the bosses N become filled with fuel,
and in their 1otalv motion, the fuel falls out of the said pockets, the said small
particles of fuel in the descent are blown on forced 1ight away from the bottom
of the chamber Ginto the furnace by means of a jet of steam passing through
the nozzle f, such steam coming from the boiler and regulated by the valve 0.
It will therefore be seen that fuel is received from the hopper by the pockets in
the bosses, and that the fuel falling from the pockets of the bosses, is blown into
the furnace, dropping upon the giate bars in about equal amounts or proportions;
consequently the fuel is spread equally on the bars in small quantities, by which
means the fire 18 hept bright and incandescent, the smoke arising therefrom being
consumed by the hot gases from the fire.
In order that the fuel may tall opposite the jets of steam, there are placed in the
chamber Gangular plates P, which guide the fuel opposite the steam 18suing from
the jets
The distance which the fuel is thrown into the furnace can be regulated by the
amount of and pressure of steam issuing from the pets, which is controlled by
the valve O.
The jet or jets of steam, may be employed in combination with other forms of
mechanism for throwing fuel into the furnace, and instead of employing steam
for that purpose, a jet of cold or hot an under pressure, may be used
R are
peepholes for the purpose of looking into the furnace
By means of my invention small particles of coal can be used for stoking, thus
effecting a saving in the cost of coal, whilst at the same time the smoke arising
therefiom is consumed
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
claim is
1. In a steam boiler furnace, the employment of evolving pockets in com-
bination with a hopper for supplying fuel to the furnaces, arranged and operating
substantially in the manner here shewn and described
2. In a steam boileı furnace the employment of evolving pockets and honner

page_text: in combination with one or more jets of steam, arranged in the manner herein
shewn and described and for purposes set forth.
3. In a steam boiler furnace the employment of revolving pockets and hopper
in combination with one or more jets of cold air or hot air under pressure, arranged
in the manner herein shewn and described and for purposes set forth.
TASKER & CROSSLEY,
Patent Agents, Halifax.