774

THE COLLIERY GUARDIAN.

April 9, 1915.

weight 8 at the end of the rocking lever 7 has not time
between the rings to overcome the cataract or dash pot 22,
and therefore the ratchet wheel 16 is not released at second
pull, but the index is carried round from 1 to 2, and from
2 to 3 -oh the dial, the index remaining at numeral 3 until
another signal is given. Whatever the number of rings
registered on the dial, the index remains at that number,
and only returns to zero when the next signal is given. The
dash pot or cataract 22 is an important feature, because by
its means the return of the pointer 20 to zero between each

12

2

±1

20	19JL6

KI J/

of a fairly quick succession of rings is prevented. The pawl
15 on the actuating rod 1 only actuates the ratchet wheel on
the down stroke, while on the up stroke the pawl is returned
to its original position by <a lever portion 28 of the same
coming into contact with -a .stop 29, .and being held there by
a spring 18. On the completion of the do’wn stroke of the
actuating rod 1, the pawl is inclined to the horizontal, its arm
28 having impacted against a second stop 30, which causes
the pawl to catch in the top loop of the spring 18. Under
these conditions the pawl is clear of the ratchet wheel 16 on
the next up stroke, and is again knocked into the position
shown in the drawing by the stop 29 ready to engage with
the ratchet wheel on down stroke; 5 is the pivot on which
the pawl vibrates; 10 is the stirrup mounted freely on the
spindle of the bell hammer lever 11. The tail of this stirrup
is depressed by the descent of the catch pin 9, thus lifting
the lever 11 and striking the gong, but it is tripped on its
axis when the catch pin ascends without lifting the lever 11.
The detent lever 25 projects through a slot in the casing 4
to the outside. This enables the detent to be operated by
hand to release the ratchet wheel 16 if required. (Seven
claims.)

6020 (1914). Improvements in Coke Oven Doors and like
Doors. H. Gourley, of the Wombwell Foundry and Engi-
neering Company Limited, Wombwell, near Barnsley, York-
shire. — Relates to improvements in reinforcing or
strenghening the doors of furnaces, coke ovens, and the like,
which are subjected to great heat, the object being to prevent
the warping or cracking of the cast iron frame of which the
chief part of such doors usually consists. Fig. 1 is a front
elevation, with a portion of the central part removed; fig. 2,

cross -section through same on line x-—x; fig. 3, vertical
section of fig. 1 through the centre. In the application of
the invention, strong bars of wrought iron or mild steel A
are employed, arranged as shown, -and embedded during the
casting process in the back B, or convex side of the door,
the number of such bars being discretionary. An endless or
loop-shaped bar C of like material is arranged -in. position
around the front portion of the door frame, and this is also
embedded within the cast iron frame D during the process
of casting the frame. E is the usual inspection hole. (Two
claims.)

11011 (1914). Improvements in Miners' Flame Safety
Lamps. J. G. Patterson, 49, Reddish-lane, Gorton, near
Manchester.—The object is to construct a lamp in a simple
and efficient manner, iso that the lighting power is improved,
that it is possible to get -a more true .and uniform standard
flame when testing for gas, that the novel means of air
supply to support combustion causes the caps due to the
presence of inflammable gas to be larger and more distinct
than in ordinary lamps burning the same kind of oil, that in
making tests for gas there is less risk of losing the light, and
also that the lamp is safe in explosive mixtures. In the
present invention the aiir is fed to the underside of the lamp
dome or cover, which for all practical purposes forms a closed
chamber, from which the combustion air is directed on to
the flame of the burner. Fig. 1 is a sectional elevation of
an improved miner’s lamp; fig. 2 is a sectional plan view
thereof taken on the line 2—2 of fig. 1; fig. 3 is >a correspond-
ing plan view illustrating -a slightly modified (arrangement of
the air feed; fig. 4 is a sectional side elevation of -a modified
form of base ring provided with an integral dome; fig. 5 is
a sectional side elevation of a base ring fitted with a glass
dome; fig. 6 is a sectional elevation illustrating a modified

form of air feed reflector; and fig. 7 is a sectional plan view
of the -said air feed reflector. As shown, the invention is
applied to a lamp which in its general outline is known as
the bonneted Cla-nny or Marsaut type. The air to support
combustion is as shown by the arrows admitted through holes
a, such holes being covered by a shield or ring c, so as to pre-
vent the air current directly impinging on the two gauzes d
and e. Inside the bonnet b a deflector f may be provided, so
as to direct the air supply to the bottom or inlet part of the
gauzes. In order to convey the air to the flame of the lamp
g, a tube or tubes h are provided, which may be of various
forms as shown. This air tube is carried by or is part of a
horizontal flange i, such flange being a suitable size to rest
on the top of the lamp glass j. In the centre of this flange
a short chimney k is fixed, and this horizontal flange i rests
on the top of the glass j and the air tube, which also acts as
a reflector, extends downwards inside and to the bottom of
the glass. The glass / resits on a base ring or cover I formed
in one with or carrying a dome v, which may also act in the
known ma'nner as a reflector, having a partly circular open-
ing or openings m to allow the air tube or tubes h to pass
through it. In the dome v is an opening n for the wick
flame to pass through. In the constructions shown in figs.

&gr.2.

-u,
A

V,
Fig:?)



1 to 4, the dome v is formed of metal, and is secured to or
formed in one with the cover Z, whereas in the arrangements
shown in fig. 5, this slotted dome or cover v is constructed of
glass or other transparent material, which will not obstruct
the passage of light, as do the metallic domes heretofore
provided. The products of combustion pass upwards
through the chimney k, then through the gauzes d and e,
and through the outlet holes t provided in the bonnet b. On
the aforementioned chimney k the inner horizontal flange of
the deflector f is an easy fit for the gauze e, and it prevents
the escape of any inlet air due to its being carried off by the
products of combustion. Small holes (not shown) may be
provided in the horizontal flange i to admit a small supply
of air down the side of the glass j, and similar small holes
u may be provided in the domed cover. When testing for
gas, the wick flame is partly lowered, -and the lamp put in
the place where it is needed to test; the wick flame is then
lowered until the tip of the flame is just level with the top
of the dome v on the cover I; the distance of the wick tube
from the top of the dome controls the size of the testing
flame, and thus the size of the caps for the same percentage
of gas, this distance being fixed -and the same in all of the
lamps. (Five claims.)

12711 (1914). Improvements Relating to Valve Seats. L.
F. Norrie and J. Hopkinson and Company Limited, both of
Britannia Works, Huddersfield, Yorkshire.—Relates to valve
seats which are inserted in a recess or socket in the valve
body or casing, and has for its object an improved method of
and means for securing such seats in position. According
to the invention, -a recess is formed in the inner cylindrical
wall of the valve seat, extending from the lower edge thereof,
and a corresponding recess is formed in the thoroughfare in
the valve body extending from the socket that receives the
valve seat. The circumferential wall of these recesses may
be cone-shaped or curved in longitudinal section, but in each

case the recess is shallowest -at the edge of the wall in which
it is formed, and the depth increases as the distance from
the edge increases. Within the recesses thus formed a ring
of metal, fibre, or other suitable material is introduced, and
when the seait is in place, this ring is deformed and pressed
outwardly, and caused to conform to the shape of the cir-
cumferential walls of the recesses, that is to say, it is pressed
outwardly to fit close against the coned or curved walls
above described, and in this way the ring is caused to form a
means which prevents the seat from working loose. The
accompanying drawing shows how the said invention may
be conveniently and advantageously carried into practice.
(Three claims.)

13161 (1914). Improvements in Underground Conveyors.
S. Hare, of Howlish Hall, Bishop Auckland, Durham.—
Relates to improvements in underground conveyors for the
transmission of coal to various parts of a mine or pit. Fig. 1
shown herewith is a side elevation of the bogie, whilst
fig. 2 is an end elevation. The invention consists of a
small bogie made of iron or steel, which will carry about
half a tub of coal, the same being drawn along the face by
means of a small hand winch or by a compressed air or small
electric hauling engine. One or more of these bogies can
be operated at the same time. The bogie is built up of
sheet iron or steel plates to form the sides and ends, and is
mounted on ia frame f, having axles g, and wheels h. The
bottom of the bogie is provided with doors d and e, which

are operated by rods i and j, connected to the -slidable bar b
by levers k and I, having slots m and n. Studs o and p
attached, to the slidable bar b operate in the slots m and n,
for opening or closing the doors d -and e of the bogie. The
dotted lines in fig. 2 show the position of the doors d -and e,
slidable bar b, levers k and I, when the doors are opened for
the discharge of material; b1 is the handle to operate the
slidable bar b. One side of the bogie has part of the top cut
away, -as shown at a in fig. 1, for the purpose of allowing
more height in which to fill the coal when the bogie 'is in
thin seams. The coal or other material is discharged by
means of the slidable bar b being lifted and pulled outwards
by the handle b1 from the slot b2 cut in the clip b3, the said
bar b being pivoted to the levers k and I, and the weight of

A

the coal then forces the two bottom doors d .and e, open as
shown by dotted lines in fig. 2. The unloading is done in
the gateway, where the tub is placed under the conveyor;
in other words, the conveyor runs upon rails along the face,
and the rails pass over the top of -the -tub, which is used for
conveying the coal to the surface. An endless rope clutch or
clip is shown at c. This is provided so that one or more
conveyors can be used on each side of the gateway. While
the coal is being filled on to the conveyor or conveyors on
one side of the gateway, the rope is pushed out of the clip,
and the conveyor or conveyors remain stationary whilst
being filled. At the same time, the conveyor or conveyors
on the opposite side of the gateway have been attached to
the rope by means of the clutch or clip, and are being hauled
along in the opposite direction. (Two claims.)

18719 (1914). Improvements in or Relating to Presses-
for the Manufacture of Cakes for Animal Foods or of Coal
Briquettes. F. H. Smulders, of 77, Catharijnesingel,
Utrecht, Holland.—Relates to presses, in which two pistons
move in a moulding chamber. These pistons are operated
from cranks -or eccentrics which have a certain advance with
respect to one another. The operation of the press is
effected approximately at the moment the pistons are in the



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_________________________ 1Z

centre of their stroke, that is, when they are at the least
distance apart, -and move -approximately at the same speed,
and towards the same point through the moulding chamber.
Fig. 1 is a vertical -section through the press ; fig. 2 is a
diagram illustrating the position of the pistons at each point
corresponding to a complete revolution of the driving shaft;
fig. 3 is a vertical section through the supply apparatus.
(Four claims.)

MEW PATENTS. CONNECTED WITH THE
COAL AND IRON TRADES.

Applications for Patents.

4807.. Conveyor rollers. B. Norton.

4809. Mode of, and means for, propping up or supporting
the roofs in mines and the like. A. Downes, W.
A. Machin, and E. Mills.

4814. Apparatus for pneumatic conveying. A. G. Bristow.

4820. Dielectric filling, insulating, or grouting composition.
R. C. Sharp.

4839. Construction of centrifugal fans, exhausters, and -the
like. W. J. Martin.

4847. Turbine nozzles. Akt.-Ges. Brown, Boveri et Cie.

4856.	Process of treating hydrocarbon oil. H. J. C.

Forrester. (New Process Oil Company, U.S.A.)

4857.	Rope grips. J. C. Dou-st and J. H. Lumbers.
4861. Means for purifying water. J. J. L. Smits.

4888.	Furnaces for heating and melting metals. I. Hall.

4889.	Apparatus for washing or sizing substances or

minerals or the like. H. J. Greaves.

4939. Manufacture of fuel from anthracite. E. R. Sutcliffe
-and Pure Goal Briquettes Limited.

4948. Reverberatory furnaces and the like. A. Payne, W.
Smith, senr., W. Smith, junr., J. T. Smith, F.
J. Smith, and S. B. Smith.

4964. Signalling in mines and the like. H. Davis. .

4970. Pit props, railway sleepers, blocks, and other articles.
Coir Tyre Company Limited, and G. D. Rose.

4980. Manufacture of artificial or patent fuel. F. C. Yeo
and T. A. Goskar.

4991. Crucible furnaces. E. Hall.

4999. Electrical welding. W. M. Mordey.

(Continued on page 776.)