Year: 1886

page_text: We, JAMES LYONS SAMPSON and JAMES HART, both of the North London Iron
Works, Wenlock Road, London, N. Engineers, do hereby declare the nature of
this invention to be, as follows:―
This invention has reference to furnaces in which solid fuel more or less finely
divided is to be consumed, and particularly to furnaces of the kind in which the
fuel is injected into the combustion chamber by means of a jet or jets of steam
or air.
For the purpose of obtaining a constant and regular feed of fuel we provide
a suitable hopper with a pair of rolls which may or may not be fluted, these rolls
being so arranged that the fuel passes between them on its way to the furnace.
They are provided with a spring or weight or springs or weights tending to keep
the surfaces of the rolls in contact or juxtaposition and are capable of moving
apart sufficiently to allow of the passage of any stone or other foreign substance
that may be placed with the fuel in the hopper. In order that the lateral motion
of the rolls may not interfere with their being constantly driven motion in a rotary
sense is communicated to them by means of a shaft provided with two worms
right and left handed respectively, these worms gearing each into a worm wheel
on the spindle of one of the rolls. For the purpose of injecting the fuel by means
of steam or air into the combustion chamber we use a nozzle of peculiar construc-
tion formed of two plates with an interposed packing piece the thickness of which
corresponds to the depth of nozzle or passage through which the.steam is to issue
in a thin stream. The interposed packing forms a joint between the two plates
and also forms the wall of a cavity between them in communication with the
steam or air supply pipe, as also with the flat exit passage whereby the steam.
escapes. With this arrangement the parts can be readily separated for internal
cleaning and an opening of small size readily adjustable can be obtained, the
adjustment being effected by varying the thickness of the material or packing
interposed between the two plates.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicants.

page_text: EE APPparato
We, JAMES LYONS SAMPSON and JAMES HART, both of the North London Iron
Works, Wenlock Road, London, N. 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 has reference to furnaces in which solid fuel more or less finely
divided is to be consumed, and particularly to furnaces of the kind in which the
fuel is injected into the combustion chamber by means of a jet or jets of steam
or air.
For the purpose of obtaining a constant and regular feed of fuel we provide
a suitable hopper with a pair of rolls which may or may not be fluted, these rolls
being so arranged that the fuel passes between them on its way to the furnace.
They are provided with a spring or weight or springs or weights tending to keep
the surfaces of the rolls in contact or juxtaposition and are capable of moving
apart sufficiently to allow of the passage of any stone or other foreign substance
that may be placed with the fuel in the hopper. In order that the lateral motion
of the rolls may not interfere with their being constantly driven motion in a rotary
sense is communicated to them by means of a shaft provided with two worms
right and left handed respectively, these worms gearing each into a worm wheel on
the spindle of one of the rolls. For the purpose of injecting the fuel by means of
steam or air into the combustion chamber we use a nozzle of peculiar construction
formed of two plates with an interposed packing piece the thickness of which
corresponds to the depth of nozzle or passage through which the steam is to issue
in a thin stream. The interposed packing forms a joint between the two plates
and also forms the wall of a cavity between them in communication with the
steam or air supply pipe, as also with the flat exit passage whereby the steam
escapes. With this arrangement the parts can be readily separated for internal
cleaning and an opening of small size readily adjustable can be obtained, the
adjustment being effected by varying the thickness of the material or packing
interposed between the two plates.
Referring to the accompanying sheet of illustrative drawings,
Fig. 1 shows in elevation a furnace door and frame with this apparatus applied
thereto, the lower hopper or chamber in which the rolls work being shown in
section and the rolls omitted.
Fig. 2 is a plan partly in horizontal section showing the worm shaft working in
bearings carried in brackets attached to the furnace front and the lower hopper
with the rolls and their shafts and the worm wheels, all these being carried by
the furnace door so that on opening the door all is left clear for stoking and
hand-firing.
Fig. 3 is a side view partly in section.
Fig. 4 is a plan with the hoppers and rolls removed.
T
Kision mantle in neation and noble in alstration
Taboo the adinat

page_text: work the worm wheel and shaft whereby it is driven and the portions of the hopper
-or containing chamber whereby the roller bearings are supported and guided.
Fig. 6 is an end view of a roll of suitable form drawn to an enlarged scale.
Fig. 7 is a detached view of a spring for keeping the adjustable roll up to its
work.
Figs. 8 and 9 are views at right angles to one another (the latter partly in
section) of the steam or air passage of the swivelling pipe whereby steam or air is
conducted to the injector.
Fig. 10 is a central longitudinal section of the improved injector.
1 and 2 are hoppers. The hopper 2 is traversed by two parallel shafts 3 and 4
on which are mounted rolls 5 and 6 that may be of any suitable form. Both these
rolls may be adjustable, but in the example illustrated one only is so. They are
driven by worm gear, 7 and 8 being worm wheels respectively on the shaft 3 and
on the shaft 4, and 9 and 10 being respectively right and left hand worms on a
shaft 11 mounted in bearings in brackets 12 fixed to the furnace front. 13 and 14
are the bearings of the shaft 3 of the adjustable roller 5. These bearings as illus-
trated in Fig. 5 are able to slide in openings formed at the respective sides of the
hopper 2. 15 is a sbaft mounted in lugs or brackets 16 upon the hopper 2. 17, 17, are
arins or fingers keyed on the shaft 15 in such position as to bear against the respective
sliding bearings 13 and 14 of the shaft 3. 18 is an arm formed with or fixed upon
the shaft 15 and to which is connected one end of a spring 19, the other end of which
is connected to a lug or bracket 20, but as will be evident the arrangement may be
modified so long as means be provided whereby the arms or fingers 17, 17, will be
caused to press against the movable bearings 13 and 14 so as to keep the roll 5 up
to its work but to admit of its receding from the roll 6, in the event of any stone
or excessively hard foreign substance entering between the rolls. It will be noted
that in the arrangement illustrated, the apparatus is mainly carried by the furnace
door, so that, when it is opened, all will be clear for stoking and hand-firing.
The pulverized fuel descends towards a feed-plate 21 and is projected into the
furnace or combustion chamber by a jet (or jets) of steam or air. In the arrange-
ment shown, a nozzle of peculiar construction is employed as represented in
section in Fig. 10 where 22 is a slot or slit through. which steam or air is to be
projected from a chamber 23, the part 24 of which is in the form of a plate (shown
recessed,) adjustable in relation to the part 25 to which it is attached by bolts 26.
27, 27 are interposed packing pieces, the thickness of which corresponds to the
depth of the nozzle or passage through which the steam or air is to issue in a thin
stream. These interposed packing pieces as already stated form a joint between
the two parts 24 and 25 and also forms a wall to that portion of the cavity situate
between these two parts and which is in communication with the steam or air
supply pipe 28 as also with the flat exit passage 22, whereby the steam or air
escapes.
As will be evident, the size of the exit opening may be readily adjusted by
employing packing pieces of greater or less thickness.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we hereby declare that
what we claim as our invention is,
In apparatus for feeding fuel to furnaces
1. Providing a feeding hopper with a pair of rolls one or both of which is or are
kept up to its or their work by the action of a spring or weight in such a manner
as to admit of lateral movement of one or both rolls to increase their distance
apart, and so allow of the passage of any stone or other foreign substance that may
be placed with the fuel in the hopper the driving being effected by worm gear
from a shaft mounted upon the furnace front, and the arrangement being such
that when the furnace door is open all will be clear for hand-firing and stoking,
substantially as described.

page_text: 2. An injector or nozzle comprising two plates or parts with an interposed
packing piece or pieces, the arrangement being such that the thickness of the inter-
posed packing piece or pieces determines the depth of the passage through which
steam or air flows to project the fuel into the furnace or combustion chamber,
substantially as described.
3. We also claim apparatus substantially as described and shown for feeding fuel
to furnaces.