July 7, 1916.

THE COLLIERY GUARDIAN.

37

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

6944 (1915). New or Improved Mode of and Apparatus
for Extracting Water from Coal. C. Burnett, of 17, Camden-
crescent, Bath.—This is an improvement on patent No.
3837/12, in which cold drying rolls are provided to which
suitable pressure is applied, and between which the coal is
passed for extracting or partially extracting the moisture,
the object being to render more effective the drying of the
coal, being especially fine coal for coking. The improve-
ments comprise rolls which are suitably heated, and through
which the coal is passed, means being furnished whereby the
coal is fed to the heated rolls under pressure, which pressure
extracts a considerable quantity of the liquid from the coal
before being passed between the heated rolls. Means are
also included whereby the coal, after having the surplus part
of the moisture or the major part of the liquid extracted
therefrom and before being passed between the heated rolls
is passed through a heated chamber or member. The
drawing is a longitudinal section. A cylindrical member A
is provided, near one extremity of which is a feeding hopper
a1 for the fine wet coal. In the cylinder is a screw B, the
spindle b1 of which extends axially along the cylinder and
is mounted in suitable bearings at each end. The outer edge
b2 of the radial flange of the screw is in very close proximity
to the interior surface of the cylinder, which is perforated at
a4 round the lower half so as to permit of the escape of
water from the coal. Preferably a ball thrust bearing, b3,
is furnished only at that extremity of the screw spindle b1,
which receives the thrust from the action of the screw, the
other spindle extremity being carried in a bearing a3 within
the delivery end of the cylinder and supported by radial
arms a4. At the delivery end of A, a tapering chamber D
is secured, the inlet end d1 secured to the cylinder being of
the same vertical width internally as said cylinder, while the
other or delivery end d2 of said tapered chamber is about
half the width vertically, but advantageously increases in
lateral width from the cylinder A. Attached to its delivery
end is a flat feeding nozzle E, also tapering vertically and
widening out laterally to about equal to the length of a pair
of pressure rollers F, F1, between which the nozzle delivers
the coal. /The chamber D is preferably steam jacketed at
d3. A hinged lid d4 is provided on the heated chamber to
relieve the pressure should the coal be fed too fast, thereby
avoiding undue strain on the screw B, and also ensuring a
more uniform feed to the rolls F F1. The pair of rolls F F1
are mounted one over the other, the upper roll F1 being
pressed by suitable means upon the lower roll F. The rolls
F F1 are hollow and are internally heated. The bottom roll
F is preferably of larger diameter than the upper roll F1,
thereby forming a convenient shelf for receiving and feeding

the material to the rolls. The coal, after passing through
the heated rolls F F1 may be delivered by a shute P direct
into a hopper or receptacle or on to a conveyor of any suitable
type. In operation the wet fine coal is delivered from the
hopper a1 to the cylinder A and the revolving screw B carries
the coal forward under pressure to the chamber D, the water
pressed from the coal escaping through the apertures a4 in
the cylinder A and being caught in a suitable contrivance.
The coal in passing through D is partially dried, and is
delivered in the comparatively dry condition between the
rolls F F1 under considerable pressure and heat, the heat
materially assisting the drying by evaporation. After
passing between the rolls F F the coal is delivered to
hoppers, conveyors, or the like. (Seven claims.)

7169 (1915). Apparatus for Feeding Pulverised or Finely-
divided Fuel. J. A. Law, of 29, Southampton-buildings,
London, W.C. (a communication from abroad by the Quigley
Furnace and Foundry Company, of Springfield, Mass.,
U.S.A.—Consists of improvements in apparatus for feeding
finely-divided fuel, such as pulverised coal, to furnaces, and
it has for object, inter alia, the widening of the scope of
control of the quantity of fuel which can be fed to a furnace
through one inlet opening. Fig. 1 is a plan, a portion of the
furnace wall being shown in cross section ; fig. 2 is a vertical,
longitudinal section corresponding to the line 2—2 of fig. 1;

a*

LZL

Ir



and fig. 3 is a vertical cross section corresponding to the
line 3—3 of fig. 1. A fuel discharge conduit 3, adapted to
deliver a current of air carrying finely-divided fuel in
suspension, extends through an opening 2 in a portion of the
furnace wall 1. This conduit has a cylindrical portion 16 of
comparatively large diameter, and connected to the discbarge
end of the conduit by a tapering portion 17. The inlet end
of 16 has an end wall or cover 23 with a central opening for
the supplemental air conduit 4, which is preferably arranged
concentrically with the fuel discharge conduit, and has a
tapered nozzle 24, which extends through 16. The discharge
conduit is provided with a water jacket, a portion 19 of

which is shown. Two fuel controllers 5, 5, are separately
connected to the conduit 3 by delivery pipes 14, 14, which
extend to inlet openings in the cylindrical wall of 16, and are
adapted to deliver into the annular mixing chamber 15, which
is formed by the wall of 16 and the wall of the supplemental
conduit 24, in a direction substantially tangential to the said
walls. The fuel controllers, 5, 5, which are supplied with
fuel by separate hoppers, 6, 6, are constructed as follows :—
Electric motors 7, 7, drive conveyor screws 9, 9 through
gearing contained in the housings 8, 8. These conveyors
force out regulated quantities of pulverised fuel from the
bottom of each hopper into the vertical compartments 12, 12,
through which the pulverised fuel falls. Compressed air
supply tubes 13, 13 enter the controllers at one side of 12, 12,
and currents of air which are forced therethrough pass out
by the fuel delivery tubes 14, 14 arranged opposite to the
tubes 13, 13, carrying with them part of the finely-divided
fuel, the surplus falling to the bottom of the compartments
12, 12, from which it is returned to the conveyors 9, 9 by the
return conveyors 10, 10 driven from the screws 9 by means of
gearing 11, 11. (Four claims.)

7547 (1915). Apparatus for Supporting Stretchers on
Vehicles Used in Mines. G. W. Payne, of 13, Taff-street,
Treherbert, Glamorgan.—Relates to apparatus for fixing on
a coal tram or other like vehicle used in mines, for the

purpose of carrying a stretcher, so that when an injured
person is placed upon a stretcher
conveyed to the surface with-
out being removed from the
stretcher or vehicle; and con-
sists of an attachment, for an
ordinary coal tram, adapted
to extend upwardly from the
sides thereof, and to which
suspending straps or springs are
fastened so that the stretcher
will be carried above the upper
edges of the tram. The straps
may be of leather, rubber,
webbing, or the like. Fig. 1 is
an end view of the apparatus
fitted with springs A, and fig. 2
is a plan. The attachment con-
sists of an iron or steel bar B,

shaped to admit of its being
hooked on to sides of a coal tram
D, and having loops G to receive
straps or springs A. The oppo-
site loops G, in the tops of the
holders B, may be linked to-
gether by means of suspenders,
which form the supports upon
which stretcher C is placed. The
distance between the suspenders
is such as to form an adequate
base for the stretcher C. When
springs A are used instead of
straps, the stretcher C will be
supported on four hooks E, one
attached to each spring A. Two
of the springs A are suspended
from each of the upward
members B. The springs A
form an elastic support for the

the said person may be

G,

B-i

B

B

stretcher C. The whole apparatus when not in use may
be detached and stored in some convenient place where the
stretcher 0 is kept. (One claim.)

figs. 1 to 3, one end of the pick

Jfy Z	Jig t	Fig 3

16289 (1915). Improvements in the Chains of Coal-cutting
Machines for Carrying the Picks or Cutters. P. J.
McDermott and H. N. Wood, both of Sun-buildings,
Collingwood - street, Newcastle-on-Tyne.—Consists of improve-
ments in the chains of coal-cutting machines for carrying the
picks or cutteis of the kind wherein the pick boxes are
secured to the respective chain links by means of pins and
lugs, so that a pick box can be turned on or removed from its
chain link for the insertion or removal of a pick. The box is
shaped to bear against the lugs of the link so that little stress
comes on the pins during working. Fig. 1 is a plan view, the
pick box being hinged and the pick inclined; figs. 2 and 3
are side views; fig. 4 is a plan view of a chain link provided
with a draw out pick box, the pick being at right angles to
the chain. Fig. 5 is a side view, and fig. 6 ta section on line
A—A of fig. 4. In
box b is hinged to
the chain link a, and
the other end is pro-
vided with a lug g
which fits in between
two lugs h on the
link. A pin j is
passed through the
three lugs h g h to
hold the box and link
together. The hinge
lug e is half the
thickness of the
box, and is pro-
vided with a pin d
integral with or
fixed in it which fits
in a lug f of the
same thickness on
the link. The pin d
in the lug e is in-
serted in the link
lug f before the box
is turned down, to
bring the lug g in
the other end be-

Jfyf J Jig J Jig 6

tween the lugs h on the link, c indicates the pick. Instead
of a hinge joint, each end of the box may have a single lug
g (figs. 5, 6) to fit between two lugs h on the link, so that the
box can be easily inserted or withdrawn, a jin j being put
through each set of lugs to keep the box and link together.
In both cases the base of the box bears on the link, as at k,
and the box is shaped to bear against the lugs on the link, so
that little stress comes on the pins j or d during working.
In both types of box the pick passes through the box, and its
inner end rests against the link, or the pick may project a
short distance into the link. The pick is put through the
box from the back. Some of the picks project outwards at
right angles to the chain, as in figs. 4 to 6, and some are more
or less inclined, as in figs. 1 to 3, on either side. This latter
result is obtained by inclining the face of the link on which
the base of the box bears as shown in figs. 2 and 3. ‘ (Five
claims.)

8902 (1915). Improvements in Apparatus for Forming
Boreholes in Soft and Loose Sand, etc. A. Hanssens, of 2,

Avenue Desire-Dehors, Havre, France.—Relates to improved
apparatus for forming boreholes in soft or loose sand or other
loose and soft water pressure bearing strata in any direc-
tion under all conditions of working. In the drawing a is
the borehole which extends into a bed or layer of sand a1; b
is the head tube of the said borehole, and it is rigidly
anchored to the surface rock in the usual manner, b2 is a
series of pipe lengths connected to the head tube b and pro-
vided at its upper end with a stuffing box b3 through which
the boring rods or tubes c pass. A branch b4 is formed on
one of the aforesaid pipe lengths, and is connected through
a check or non-return valve b5 with a column or head of

water or other

fluid b6 which is
adapted to create
a hydrostatic pres-
sure in the bore-
hole which is suf-
ficient to with-
stand the
pressure of the
sand a1 and avoid
the harmful
action thereof on
the borehole. The
valve bB will
maintain th^
hydrostatic pres-
sure in the bore-
hole a, and will
prevent the liquid
rising into the
column. Liquid
cement or any
other fluid may
be injected into
the borehole
under pressure if
it is desired to
congeal or con-
solidate the soil
surrounding the same. In this case also the valve bs would
prevent the liquid rising into the column b*. A valve d is
provided between the stuffing box b3 and the head tube b
of the borehole for cutting off communication between the
members when the boring rods or tubes c are withdrawn
from the borehole. Water or other fluid is continuously
supplied to the column b6 so as to make up for the leakage
or wastage through the walls of the borehole and the flow of
liquid carrying the mud or debris out of the said hole during
the boring operation. The fluid passes down the borehole
around the boring tube c and carries the mud or debris up
through the said tube to the upper end thereof, where it is
discharged through a suitable valve not shown. The water
may be also supplied to the borehole dn the opposite direction,
and in this case the boring tube c would be directly con-
nected to the column b6, and the mud or debris would be
discharged through a lateral valved branch provided on the
head tube or piping of the borehole. The non-return valve
would then be placed on the boring tube itself. (Two
claims.)

100331. Improvements in Miners' Picks. T. G. Jones,
of 14, Heath-terrace, Ynishir, Rhondda; E. G. Cross,
of 18, Bailey-street, Wattstown, and D. J. Jones, of 38,
Heath-terrace, Ynishir, Rhondda, Wales.—Relates to miners’

picks, wherein the end of the heft is held in a socket having
tapering sides by wedges inserted in such socket, and con-
sists essentially in providing an arrangement of wedges
which are automatically tightened up to grip the helve end
in its box and hold it securely in position by the fixing of
the blade in its socket. Fig. 1 is a sectional elevation;
fig. 2 is an end elevation; and fig. 3 is a cross section
through line A B, fig. 1. The helve box a is of any suitable
size or thickness to suit the pick to be used. The box is of
cast or malleable steel or iron, or wrought iron, and is
slotted at the ends as at b, c, and d. The slot b receives the

blade, and forms the blade socket. The parts c of the slot
b form the feather socket, and those marked d are for set
pins e employed to keep the wedges f, figs. 1 and 3, herein-
after more fully described, in position inside the box a. The
helve end of the box a is formed with parallel sides, but has
its ends tapered downwards from the feather socket c. g is
the helve, and is of a parallel form throughout. The wedges
f, serve to hold

the helve g in posd-	?.

tion in the box a	a

and are tapered
on both sides, the
surface on one side
of the wedges con-
forming to that of
the inner surface
of the ends of the
box a, whilst that
of the other side
of the wedges is of
a form to corre-
spond with the
shape of the helve.
When the wedges /
are in positions in
the box a they form
walls to adapt the
box for the recep-
tion of the end of

the helve. The
wedges f are first
placed in the helve
end of the box a
and held loosely
therein by means of
the set pins e. The
box a is then held

upright with its blade end downwards, which will cause the
wedges f to drop into the feather socket c. The depth to
which they will enter the feather socket is determined by the
slots d in which the set pins e of the wedges f work. The
helve g, which is parallel, is then inserted in the box a as
far as it will go. The blade, together with its key or keys
(if any) is then placed in the blade socket b. The thin end
of the feather h (fig. 1) is next inserted in the feather socket
c, and driven with a hammer or mallet until it is fixed quite
firmly. This drives the wedges f, projecting out towards the
helve end of the box a, the sides of which latter close the
wedges securely on the helve, i is a wedge which may be
made use of in conjunction with the feather h to hold the
blade in its socket. To release the helve, it is simply neces-
sary to knock out the feather h, take out the blade and stamp