330

THE COLLIERY GUARDIAN.

August 7, 1914.

or other means of suspension breaks. Slackening of the
suspension rope or its equivalent does not result in the
device coming into operation. The safety device is designed
so that when it does operate, the pressure brought to bear
on one side of the guide is balanced by an equal pressure

on the opposite side, so that the guides or shaft are in no
way damaged. The accompanying drawing illustrates the
general arrangement of the invention with the electro-
magnetically operated safety device in position n n It
likewise shows the electrical connections, the direction of
the current being indicated by arrows. (Five claims.)

5906 (1914). Improved Device for Preventing Accidents
in Coal and other Mines due to Overwinding. W. Wilson,
of Bathville Cottage, Armadale, West Lothian, Scotland.—
Is a further improvement in or modification of the inven-
tion for which a patent has been granted, No. 1655 of 1913.
According to the present invention a rack is employed which
reciprocates backward and forward, and the movement in
these directions represents the ascent and descent of the
cage in the winding operations. Motion is imparted to the
rack by means of chain and sprocket wheels, giving motion
to an intermediate shaft, which again transmits motion to
a second shaft by means of spur gearing, as well as to a
governor, by means of a belt. This second shaft has a
tooth pinion which gears into the rack. The rack gives
motion to a carriage to which it is fitted. A governor,

Fly 2

actuated by belt on secondary shaft is introduced which,
when engine attains a dangerous speed, raises a lever or tee
piece, which comes in contact with a cam. The said cam
being raised engages with a roller or rollers fitted to the
end of shaft having pawls which operate the sectors carry-
ing the weight at the end of brake lever, as set forth in the
aforesaid former patent. The carriage has mounted upon
it inclined levers which, in the traversing of the rack back-
ward and forward, raise a roller mounted on a rod designed
to actuate the throttle valve. The weight and sectors are
raised and put into the operating position by hand.
Fig. 1 is a side elevation of the improved arrangement
embodying the invention; fig. 2 is a plan of the same.
(Five claims.)

19453 (1913). Improvements in or connected with Gauges
for use in connection with Cutters of Machines for Cutting
Coal and the like. Mavor and Coulson Limited, of 47,
Broad-street, Mile-End, Glasgow, and J. M. Martin, of
Innerhadden, Balmoral Drive, Carmyle, Lanarkshire.—
Machines of the disc type for cutting coal and the like are
provided with a series of peripheral cutters, the series being
composed of groups. In practice it is desirable that the
points of the teeth of each group shall project from the
periphery of the disc to varying extents in some defined
order. For effective cutting it is necessary that the teeth
of each of the groups of the series fitted to a disc should be
in conformity, and it is the object of this invention to pro-
duce a gauge for use in making cutters, or for use in
repairing cutters for disc machines, having groups of cutters
of this description, so that the groups of the whole series
may be made to conform to one another. Fig. 1 is a back
elevation of a group of cutters; fig. 2 is a side elevation;
fig. 3 is a plan, and fig. 4 is an inverted plan of a gauge;
fig. 5 is a side elevation; and fig. 6 is a plan of a modified
form of gauge. A gauge, as illustrated at figs. 2, 3 and 4,
comprises a bed plate E, and, at what will be termed its
foot, a socket F to receive the shank D of a cutter. The
socket F, if the shank is rectangular in cross section, may
consist of two side walls and a foot wall, the base of the
socket being formed by or as an extension of the surface
of the bed plate E. At the head of the bed plate E a tem-
plate G is provided, which is mounted so as to be capable
of endwise adjustment relative to the socket, for which
purpose, in the form of construction illustrated, the
template G is provided with side guides G1, adapted to fit
over the sides of the bed plate E, which are formed straight
and parallel to one another. For fixing the template G

when set in its required position, a bolt H is provided to
extend through a hole in the template and a slot H1 in the
bed plate E. An alternative to this arrangement would be
to form a slot in the template G and a hole in the bed
plate E. A thumb screw nut H2 is provided on the bolt H
for tightening the parts together. For gauging the position
of the teeth of cutters, such, for example, as those of the
group A, B and C, the rim of the template G, which faces
the socket, is formed with recesses, or it might be pro-
vided with markings only, for indicating the correct position
the tooth of the cutter, or the correct positions the teeth of
the cutter, should occupy when the cutter is placed with
its shank D in the socket F. In one form of cutter the
face of the shank D and tooth or teeth are, arranged to lie
in a plane, so that by using a flat bed plate E, the face
of the cutter lies upon the bed plate and, when properly
finished, its tooth, if it is the first of a group, fits into its
respective recess or comes opposite its mark, or its teeth,
if it is either the second or third cutter of a group, fit into
their respective recesses or come opposite their markings.
As cutters of this description are required to be provided
suitable for either direction of rotation of the cutter disc
of the machine, two series of groups of cutters may have

F/G: 6

F/G2

<7* E

F/G 3

to be dealt with, and in order to make the gauge illustrated
at figs. 2, 3 and 4 capable of dealing with either kind, the
bed plate E is made reversible and provided on its under-
side with an auxiliary socket F1. The same template G
may, however, be used when applied to either side of the
bed plate E, provided it is the right way up. The modified
construction illustrated at figs. 5 and 6, consists of a part
comprising a socket F riveted to a bed plate Eand a tem-
plate G having slots G3, which, in conjunction with a fasten-
ing bolt H2 and guide pins G4, serve as guides for the
template in endwise adjustments, and means for fastening
it in position when set. (Nine claims.)

20916 (1913). Improvements in and relating to Means
for Securing Mining Machines and the like. J. Tuck, H.
Smith and S. Sims,, all of Hawks Nest, in the County of
Fayette and State of West Virginia —According to the
invention an improved expansible gripping device is pro-
vided, comprising two pivotally mounted and normally
retracted jaws, having angular grooves therein, and a
plunger having a pyramidal head that engages the angular
grooves in the jaws to expand them when force is exerted
on said plunger. Fig. 1 is a view of the device showing it
in position in a boring in a breast of coal; fig. 2, a view
in elevation of the device, the jaws being shown retracted
and the plunger head extending out of the same; fig. 3,
a longitudinal sectional view of the body of the device; and
fig. 4, an end view, showing the plunger removed, hi use
after a boring has been made in the coal or other mineral,
such as shown at A, the device is inserted in position.
After the device is in position in the boring, the draft
cable 17 is placed in engagement with the hook 16, and the
plunger 13 is pulled outwardly. By the outward movement
of the plunger 13, the head 15 thereon is moved into
engagement with the grooves 9 in the inner sides . of said
blocks 4, and said blocks are swung outwardly against the
resistance of the springs 10 until the teeth 8 thereon engage
the walls of the boring. It will be understood that a con-
tinued pull on the draft cable 17 will serve to spread the
blocks 4 outwardly, so that the device will be held more
firmly in engagement with the walls of the boring; thus
providing an anchorage for the cable 17 connected to the

machine to be held. When it is desired to remove the
device from the boring, the plunger 13 is driven inwardly
by striking the lug 21 with a hammer or other suitable
implement. The springs 10 will then move the blocks 4
toward one another, so that the teeth thereon will be released
from engagement with the walls of the boring. To loosen
the teeth and further facilitate their release, the tubular
member 1 may be driven inwardly by striking the lug 18.
The device may then be removed from the boring by manual
or other power engaging the ring 19. (Two claims.)

22106 (1913). A New or Improved Automatic Controlling
Device for Winding Engines.—J. J. C. Allison, of Lunton,
Butterknowle, Co. Durham, and J. Waller, Woodlands
Colliery, Co. Durham.—Relates to the usual cataract or
dash pot controlling devices used in conjunction with wind-
ing and other similar engines, such a device usually
consisting of two or more hydraulic cylinders, connected
together in such a manner as to complete a closed circuit

for the liquid contained therein, the outflow from each to
the other being controlled by valves of varying descriptions,
operated either mechanically or automatically. The inven-
tion has for its primary object the provision of a device of
the above character, but so constructed as to utilise, not
the difference in levels of the water within the hydraulic
cylinders, but the pressure therein to effect the necessary
control. A further object is to utilise, instead of the com-
plicated and numerous valves hitherto employed, the rams
or plungers as the means for checking the out-flow of fluid
from the cylinders. The invention consists of a device of
the above type, so constructed that when the plungers or
rams have reached a predetermined height in the cylinders,
or when they exceed a certain predetermined rate of travel,
the fluid within such cylinders is compressed, causing the
whole apparatus to be lifted, which movement is utilised for
controlling the admission of steam to the engine or the
brake gear, or both, simultaneously. To this purpose the
invention consists essentially in the provision of two closed
circuits, although further circuits may be added as found
desirable. These two circuits comprise two hydraulic
cylinders, the interiors of which are in communication at
three different points with pipes, one to each cylinder
respectively, but such circuits are in no way in communica-
tion with each other. The usual plungers within these
cylinders are at all points of their travel immersed in fluid,
thereby differentiating the present system from the previous
or known systems at present in use. The three points of
communication above referred to between each cylinder and
its respective pipe are so positioned as to comprise two at
the upper end of the cylinder and one at its base. The
highest situated point of communication is controlled by a
one-way valve, which allows the fluid to pass inwardly,
that is from the pipe to the interior of the cylinder, but
not in the reverse direction. The second point of communi-
cation is partly controlled by an ordinary stop valve, the
control proper being effected by the ram or plunger working
within the cylinder. The stop valve is for regulating the
rate of outflow of the fluid from within the cylinder, and
incidentally the rate of descent or ascent of the cage or
the like. The method employed for regulating the extent
of travel of the cage or the like, consists essentially in the
provision of means whereby the extent of travel of the
plungers within their respective cylinders may be collectively
varied at will. To this end such plungers are suspended
at a point between their connection with the usual
synchronously operating drums, so that they may be raised
or lowered at will within their respective cylinders. Fig. 1
is a side elevation, and fig. 2 a front elevation of a device
constructed in accordance with the invention. The method
of preventing overwinding is as follows :—The drum 12,
which rotates synchronously with the main winding drum

HgI	Rg.2.

on the engine, raises or lowers one of the plungers 7, until
the piston at the end of same reaches the valves 6, when
it is prevented from proceeding further owing to the fluid
behind it becoming entrapped for want of an exit, due to the
pressure of the non-return valves 5 forming a buffer or
cushion, which has the effect of raising the whole apparatus,
comprising the cylinders 1, the pipes 3 and block 2, which
slides up the rods 16 by means of the cross pieces 17,
carrying with it the depending bracket 26, which is
indirectly connected to the throttle and brake gear,
effectually stopping any further movement of the cage. To
enable the device to resume its normal position, the counter-
poise 20 is raised by either of the methods above described,
thus resulting in the lowering of the pulleys 11 with their
housing 13, and with them the plungers 7, so uncovering
the valves 6 and allowing the imprisoned water above same
to escape. To regulate the speed of the cage the valves 6
are partially closed to prevent the water driven before the
piston exhausting at two high a rate, as would be the case
were they wide open. It will thus be seen that the pistons
are constantly being arrested or partially so, in their move-
ments up the cylinders, due to the cushioning effect of the
trapped fluid, thereby lifting the movable part of the device,
and with it the depending portion 26, which being connected
to the engine throttle acts as a governor in keeping the speed
of travel constant. (Six claims.)

The List of New Patents connected with the Coal and
Iron Trade will be found on page 332.

Hull Coal Exports.—The official return of the exports of
coal from Hull for the week ending Tuesday, July 28, 1914,
is as follows :—Abo, 691 tons ; Andorf, 1,663; Alderney, 216;
Arendal, 1,791; Antwerp, 574; Alexandra, 2,490; Amster-
dam, 1,129; Buenos Ayres, 10,590; Bremen, 1,968; Copen-
hagen, 128; Cronstadt, 35,656; Drontheim, 310; Ghent, 905;
Gefle, 2,209; Gothenburg, 1,210; Harlingen, 641; Heligo-
land, 181; Harburg, 2,324; Hamburg, 5,329; Kallundborg,
2,326; Kalmar, 972; Limhamn, 2,037; La Pallice, 1,407;
La Plata, 3,500; Libau, 596; Malmo, 3,018; Nykjobing,
1,626; Newfairwater, 606; Odense, 1,967; Pernau, 4,570;
Pellworm, 81; Riga, 3,113; Rotterdam, 212; Rouen, 5,355;
Reval, 1,701; Stockholm, 798; Stege, 1,153; St. Petersburg,
2,428; Trieste, 505—total, 107,973 tons. Corresponding
week last year—total, 117,113 tons.