240

THE COLLIERY GUARDIAN

July 30, 191d.

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

9057 (1914). Improvements in and Relating to Elastic
Fluid Turbines. J. Gray, of 83, Cannon-street, London,
E.C. (A communication from Mr. Charles G. Curtis, of
2, Rector-street, New York, U.S.A.)—Relates to that type
of steam turbine which has a drum stage, and is particularly
designed to secure as high an efficiency as possible, and at
the same time to avoid any excess of thrust on the drum
head and *any excessive end thrust on the shaft. The invention
relates particularly to turbines of the type in which a drum
stage is employed, and in which leakage fluid is used to
produce an end thrust, and then utilised in the working
passages nearer to the exhaust. It comprises a baffl sleeve
composed of segmental sections free to expand circumferen-
tially. When cold there are spaces between the segments
and the heat of the fluid, steam, for example, causes the



segments to expand until the spaces are closed. The seg-
ments are attached to a fixed part of the turbine, a
diaphragm, for example, and co-operate with a flange on
the forward end of the drum. Preferably the segments of
the baffle sleeve are provided with circumferential ribs, and
composed of softer metal than the flange on the drum, so
that the ribs will wear away in the event of their coming
into contact with the flange. The baffle sleeve is utilised
in a turbine, of the type above referred to, to permit leakage
of steam, for example, at the inlet end of the drum stage,
this leakage steam being allowed to exert an end thrust, and
then expanded in the working passage of the drum stage
nearer to the exhaust. The accompanying drawing is a
longitudinal section of the upper half of an elastic fluid
turbine embodying the invention employing two wheel stages
and a drum stage. (Three claims.)

11658 (1914). Improved Hydraulic Briquetting Machine.
0. Korte, of 10, Avenue-crescent, Harehills-avenue, Leeds,
Yorkshire.—Relates to mechanism for use in the production
of briquettes by compressing granulated substances (such as
turnings, borings, and the like of metal) into the form of
said briquetttes, and particularly to that type or class
wherein hydraulic pressure is made use of. The accompany-
ing drawing is a side elevation of sufficient of a press or
hydraulic briquetting machine to illustrate the invention,
only one-half of the machine being shown, since the other
half is of identical construction and 'arrangement. Assuming
that the feed barrel lib is filled with granulated substances
as borings or the like, and that .it has been turned down so
as to supply the cavity 11 with the desired quantity of said
substance, then water is admitted to the left side of the
piston 3, at which time it will force the piston 3 outwardly
from the left to right, so that the pressing tool 7 is thereby
carried forward to force the granulated substances into the
mould 7 a, where they are compressed and a briquette is
formed. The desired pressure having been reached for
compressing said briquette, a reversal in the direction of the
flow of the water within the cylinder 2 is effected, and
pressure water is admitted to said cylinder 2, so that similar
pressing operations are effected by the piston 3 moving in
the opposite direction, and actuating the pressing tool on the
opposite or left side thereof through the medium of the

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piston rod 3b, at which time a briquette will have been
compressed on the other side of the machine. During the
receding movements of the pressing tool 7 the press block 6
will have been rotated through the desired space by its
several connections from the crosshead 8, in order that said
block 6 will be moved from covering the outer end of the
mould 7a, on which an open space in the periphery of said
press block 6 will be brought opposite said mould 7a. The
pressing tool 7 will then recommence to move forward, but
at this time it will not have been supplied with granulated
substance through the cavity 11 for the reason that at such
time the rotary motion of the feed barrel 11b will have
carried it only half a revolution, thus bringing its measur-
ing cavity from its lowest, or delivery, position, to its
highest, or receiving, position, where it is supplied with the
granulated substances; hence the forward motion of the
pressing tool 7 at this time has the effect of only dislodging
the pressed briquette from the mould 7. The next return
movement of the pressing tool 7, which is brought about by
a reversal in the direction of actions of the pressure water
in the cylinder 2, has the effect of bringing a blank part of
the press block 6 opposite the end of the mould 7a, and at
the same time it will have operated, the feed barrel lib
through its next half revolution, thus supplying granulated
substances to the cavity 11 ready for the next advancing
movement of the tool 7 to re-commence the same cycle of
operations. (Five claims.)

16212 (1914). Improvements in Means for Connecting
the Drill Rod, Core Barrel, and Sediment Tube of Rotary
Boring Apparatus. A. McNamara, of Farm Zuuafontein
No. 369, Pretoria District, Transvaal, South Africa.—Has
reference to means for connecting the drill rod to the core
barrel and sediment tube of rotary boring apparatus. By
means of the invention, a single tube is divided into two
compartments—the one serving as the core barrel, and the

other as the sediment tube—without cutting it. By
obviating the necessity for joints and screw threads in the
tube at the connection, the core barrel and tube are rendered
more serviceable and much stronger than at present. The
plug is utilised for making the connection between the drill
rod and tube. The core barrel and sediment tubes can be
made from ordinary tubing anywhere (the only tool required
being a ratchet or other simple type of drill), and the



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improved connection can be placed in any desired position
in the tubing so that the space allowed for the core barrel
and sediment tube respectively can be made to best suit
requirements. Pig. 1 is a sectional elevation of the con-
nection; and fig. 2 is a sectional plan of fig. 1 on the line
x—x. (Six claims.)

18837 (1914). Improvements Relating to Coal and other
Delivery Wagons. J. Batkin, of 17, Wilton-road, Spark-
hill, Birmingham.—The object is to provide in a simple and
economical manner for the sale of coal in small quantities
from a loaded lorry, and to render such sale independent of
the honesty of the carter. The invention comprises the
arrangement in conjunction with a scales or weighing

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machine, which is mounted in permanent combination with
a vehicle, of a detachable weighing receptacle, and the
adaptation of the said receptacle and of means in conjunc-
tion with the vehicle, so that the receptacle cannot be with-
drawn from the scales unless a pre-determined weight of
material is charged into it. Fig. 1 is a part sectional side
elevation; and fig. 2 an end elevation, showing diagram-
matically a weighing apparatus in conjunction with a
lorry. (Four claims.)

19544 (1914). Improvements in or Relating to Rope Clips
for Haulage Purposes. G. Bates, of 6, Butt’s-street,
Armley, Leeds, Yorkshire. Has reference to that type of
haulage clip having a pivoted jaw grip, in which the jaws
are closed by a wedge-shaped frame engaging the sides of
the jaws. According to the invention, a pair of jaws is
provided, whose upper ends are hinged together upon a
common stud, to which is also hinged a short toothed rack
extending upward above the said jaws, and the latter, with
their toothed rack, are passed within a box-like casing with
the rack uppermost, while the casing is provided with a
pivoted hand lever formed with a toothed segment meshed
with the rack attached to the jaws. The jaws and their
rack are made vertically slidable in the casing, the arrange-
ment being such that on the harl l-ver being operated, the
jaws are caused to travel out by w«y of the lower open end
of the casing and back to within the casing, according to
the direction of movement of the hand lever. Between the
hinged jaws is interposed a spring, which tends to force

the said jaws apart, while the inner side walls of the casing
are bell-mouthed or bevelled outwardly in such a manner
as to allow the jaws to open through the medium of their
spring when slidden downward, and be caused to close when
raised to within the casing. The gripping portions of the
jaws extend below the open end of the casing, and assuming
a rope is to be gripped, the hand lever is raised on its pivot,
when the toothed segment and rack lower the jaws, which
then assume an open position by reason of the side walls of

the casing allowing the spring to force them apart, while on
the jaws being passed on to the haulage rope, the hand
lever is depressed and the jaws raised, through the medium
of the segment and rack, when the bevelled side walls of
the casing cause the hinged jaws to close upon each other
and grip the rope. The amount of grip imparted to the
jaws is in proportion to the depression of the hand lever; and
in order to hold the hand lever in the down position, it is
formed with a toothed rack, with which engages a pavl
pivoted on the casing. Figs. 1,2, and 3 are respectively a
sectional side elevation, a part sectional end elevation, and
a plan view, of the improved clip. (Four claims.)

19831 (1914). An Improved Haulage Clip for Coal or
other Hutches or Corves. I). Galbraith, of 23, Glebe-street,
Campbeltown, Argyllshire.—Relates to cam action clips for
use in connection with the haulage of coal or other hutches
or corves. The clip which is adapted, as usual, for use in
connection with the haulage rope, is secured to a draw bar
of the hutch, and then secured to the haulage rope. The
clip is provided with a catch controlled by a cam arrangement
of such a nature that when the catch is operated to grip the

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haulage rope, the pull of the latter will automatically tend
to tighten the grip. To effect this, it is preferable to
arrange for the pull of the rope to turn a nipper wheel, and
also a cam in such manner as to cause the catch to auto-
matically tighten its grip of the rope. Fig. 1 is a side
elevation of the clip; fig. 2 is a vertical cross section
through the clip; fig. 3 is a view showing the interior part
of the clip, with the parts in the non-gripping position;
fig. 4 shows the same parts in the gripping position; fig. 5
is a reverse view of the front part a1. (Three claims.)

20342 (1914). An Improved System of and Means for
Signalling Electrically, Especially for Use in Coal Mines
and the like. H. Green, of Greenheys House, Little Hulton,
near Bolton; and W. de M. Landon, of Green Bank, West
Timperley, Cheshire.—Relates to and consists of a new or
improved arrangement of electric bells or indicators chiefly
for use in coal mines and the like, for enabling the men in
charge of the corves or wagons to signal from one to another
from any point when a wagon is being sent along the track.
The invention has for its object to provide a single main line
circuit of low voltage and normally completed, in combina-
tion with a series of local bell or like circuits, the connec-
tions being such that on pulling the main line wire at any
point the main circuit is broken and the local circuits are
all completed, thus giving the desired signal. Fig. 1 illus-
trates an example of the improved arrangement of electric
signalling appliances suitable for signalling at three points
or stations; fig. 2 illustrates, to a larger scale, one of the
indicators ; fig. 3 illustrates a longitudinal section of a device
forming part of the improved appliances called an
“ interrupter ”; fig. 4 illustrates a modified construction of
“ interrupter.” Upon 'a signal requiring to be given, the
operator, by pulling the line wire between an interrupter -and
an indicator, separates the bolt k from the bolt i in the
interrupter, and thereby breaks the main circuit. In thus
breaking the main circuit, the armature c1 of each relay
magnet, under the pull of the spring c2, completes the local

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bell circuit. For the purpose of distinguishing the signals
intended for the different stations, the main circuit is broken
and made one, two, or more times in succession. The
current for the bell circuit will not require to be more than
6 volts, while that for the relay circuit also need not be
more than 6 volts; therefore, in breaking the circuit by
means of the interrupters, the spark, if any, owing to the
high resistance of the magnet coils and small E.M.F. used,
will be quite insufficient to ignite an explosive gas. Each
indicator will preferably have a push button n for breaking
the main circuit at the signalling station. Whilst the
contact between the bolts i, k is made and broken within the
tube h, which affords a certain amount of protection, the
breaking of the circuit may be effected within a gastight
interrupter, such interrupter, for example, taking the form
of a pivoted box o, containing mercury (see fig. 4). To the
insulated terminals o1, o2, on the opposite ends of the box
are connected the sections of the line wire g. Normally the
box remains horizontal, and thus causes the mercury to