1140

THE COLLIERY GUARDIAN.

May 30, 1913.

miner’s lamp illustrating an embodiment of the invention.
Whenjthe two gauge cones are placed in position, the ring of
the outer cone A seats itself against the ring C of the lamp
bonnet, and the lateral flange g of the inner gauze cone
ring G seats itself against the inner flange &1 of the outer
gauze cone ring B, and itself forms a seating for the cylin-
drical lamp glass E. The said glass having been put into
position, the screwing up of the lamp-glass holder jH ensures
the effective joints or contacts being made between the
several parts, and it is thus manifest to’anyone that the
parts have been put together properly. If, however, the
inner gauze cone F be accidentally omitted in the putting
together of the parts of the lamp, the channel in the ring B
of the outer gauze cone A will be uncovered, and the lamp
glass E will pass into the said channel and have no seat to
abut against, so that the screwing up of the lamp-glass
holder H will cause the said holder to be ^screwed right
through the lower screwed ring I of the lamp frame. On
the other hand, if the outer gauze cone Al be ^accidentally
omitted, the ring g of the inner gauze cone will have
nothing to support it, and consequently the said inner gauze
oone F will pass loosely into a portion C of the ring of the
bonnet, and so likewise result in the lamp-glass holder H
being screwed right through the ring I of the lamp frame
when screwed up, owing to the lamp glass E having nothing
to seat itself against. Thus it is rendered obvious to any
person puting the lamp parts together that an omission has
been made. (Four claims.)

10929 (1912). Improvements in Machines for Washing or
Separating Coal, Ore and Other Granular and like Materials.
R S. Benson, of " Riverside,” Middleton St. George,
Durham, and Head, Wrightson and Co. Limited, of Tees-
dale Ironworks, Thornaby-on-Tees, Yorkshire.—Relates
particularly to those machines in which the (separation of
the materials of differing specific gravity is effected by
subjecting the material to a conveying {motion operating in
one direction and to a stream of water flowing in the
opposite direction as described in the specifications of prior
Patents No. 21253/1909, No. 24269/1910,: and (22813/1911.
In a machine of the type specified a perforated feed tray

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which is located above the washing trough and has a
’Conveying motion imparted to it in the opposite direction
to the washing trough is combined with a plurality of
water feeds located between the feed tray jand the washing
trough. Fig. 1 is a diagrammatic view in vertical elevation
of the entire machine ; figs. 2 and 4 are broken longitudinal
sections on an enlarged scale, showing parts of the machine;
and fig. 6 is a transverse section on line y y, fig. 2. (Seven
<flaims.)

15792	(1912). Improvements in Weighing Machines*

Henry Pooley and Son Limited and J. Dobson, both of
John Bright-street, Birmingham, Warwickshire. — Has
reference to weighing machines or weighbridges in which
the weight or load is weighed through a'steelyard or the

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like, and such steelyard is balanced; and includes those of
this type of machine in which the weight is transferred
from the weighing levers to the steelyard through a supple-
mentary lever, provided near the weighing mechanism of
the steelyard, or directly to it. The object is to provide
improvements by which the movement and wearing of
the knife edges is generally diminished ; while at the same
time the movement of the steelyard into the position of

equipoise from zero position, is rendered clear. In connec-
tion with the outer end of the steelyard, there is employed
a balancing weight or weighted arm or lever mounted on
knife edges, and connected by a link or like connection with
this end of the steelyard ; and this device, acting on the
steelyard at this leverage from its fulcrum, enables the
balancing weight to be quite small and the whole mechanism
simple ; and it tends rather to relieve the main knife edges
of the weight and wear. The steelyard is preferably arranged
to work on the “ accelerator ” principle, and its movement
is relatively short, say as little as | in. in its total move-
ment to equipoise from zero; but the position of equipoise,
and its movement, is indicated, and its action made plain,
by an indicator arm or finger connected with this mechanism
—say at the end of the weighted balancing lever—which
works over a scale or dial; and this arm or finger may be
horizontal, so that it has the same direction of movement
as the steelyard; but it may be vertically or otherwise
disposed. The accompanying drawing is a side elevation
showing one combination and arrangement of parts. (Three
claims.)

16536 (1912). Improvements in Mining Cartridges. N.
Field, of Akenside Hill, Newcastle-on-Tyne.—Relates to
improvements in mining cartridges in which the case has
an inwardly projecting tube closed at its inner end and
open at its outer end to form an open cavity for insertion
of the detonator, and broadly consists in making the
cartridge case and detonator tube of glass, the tube being
formed in one piece with said case as by blowing, moulding

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or the like. The invention further consists in various
locations or arrangements of said detonator tubes relatively
to the end or side walls of the case, for instance the
detonator tube may be integral with a side wall of the
cartridge case and inclined thereto, or again said tube may
be at one side of the case and integral with the wall and
closed end thereof, the tube being complete on the outside.
The annexed drawings illustrate in section three forms of
construction of the invention. (Three claims.)

17732 (1912). Improvements relating to Regulating and
Reversing Apparatus for Regenerative Gas Furnaces. H.
Kopper, of 81, Bruchstrasse, Millheim-Ruhr, Germany.
Relates to a further modification of the regulating and
reversing apparatus described in Specifications No. 30294 of
1909 and 19372 of 1911. The present improvements are
directed towards the positioning of the parts of the rocking
member relatively to one another as also to the water
inflow and outflow. A further improvement serves for the
utilisation of the variable water supply for the control of
not only the gas valve, but also of the air supply to the



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regenerative fnrnace. This is attained by connecting the
water-supply pipes for the chambers of the gas valve, with
the similarly arranged air valve. The latter has chambers
in which different water levels can be provided by suitably
operating the rocking member in the manner previously
described with reference to the gas valve. This control is
simultaneously effected for both valves, and consequently
only a single reversing member is required where previously
two reversing members had to be used. Figs. 1 and 2 are
vertical and horizontal sections respectively of the
reversing and regulating valves. Fig. 6 is a horizontal
section of the complete regulating and reversing system.
(Six claims.)

23440 (1912). Improvements in Devices for Removing
Excavated Material. E. C. R. Marks, 57 and 58, Lincoln’s-inn
Fields, London, W.C. (a communication from abroad from
Norman Ebbley, of Wallace, Idaho, U.S.A.).—The“ mucker ”
consists of a long shovel-like structure, preferably composed
of sheet steel, which is capable of a to-and-fro motion. In
advancing the mucker shovel, the same is given a quick
forward movement, said movement being very much in the
nature of a man using an ordinary shovel to insert the
shovel under the material. The mucker shovel is then
withdrawn rearward, the movement at first being a slow

movement, which movement, however, is constantly
accelerated. The mucker shovel having’acquired a rapid
rearward movement, it is brought to a sudden stop and the
inertia of the material thereon causes the same to continue



the backward movement after the shovel has stopped, thus
advancing the material towards the rear of the shovel. At
the next forward movement of the shovel, it is given a
sudden or quick impulse forward, and the muck resting
thereon, by reason of its inertia, fails to move forward with
the shovel, thus advancing the muck further to the rear on
the shovel. This operation is continually repeated until
the muck is brought within the sphere of action of any
suitable endless carrier operating in conjunction with the
mucker for withdrawing the muck beyond the rear of the .
device when it may be removed in any suitable manner.
A subsidiary feature consists in providing a power cylinder,
the piston of which operates the muck shovel, a varying
motion being given to the shovel by alternately restricting
and increasing the opening to the exhaust of the cylinder.
The mechanism is shown in the drawings accompanying
Specification 13852, of 1912. Fig. 4 is an enlarged detail
plan view of the muck-shovel operating engine showing a
portion of the shovel attached thereto. (Seven claims.)

23840 (1912). Improvements Relating to Air-compressors.
J. Francois, 10, rue Collard Trouillet, Seraing sur Meuse,
Belgium.—Has for its object a method and means for
enabling air-compressors to furnish, by the variation of the
pressure of the air drawn in, and during the period when
the consumption of the receiver appliance is greatest, a
quantity of air much greater than the normal quantity, so
as to thus maintain the normal pressure in the pressure *
reservoirs. This result is obtained by the aid of a supple-
mentary reservoir, communicating on the one hand with the
reservoir connected with the outlet pipe of the compressor,
and on the other hand with the suction side of the com-
pressor, through the medium of certain valves, operated

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automatically or by hand, so that, when starting, the air
is compressed in both reservoirs simultaneously or succes-
sively (after the maximum pressure has been attained in
the principal reservoir) and the supplementary reservoir
assists the suction of the compressor when the demand for
air is greater, whilst when the pressure rises above the
normal working pressure, the excess of air returns to the
supplementary reservoir, or to the outside air. Fig. 1 shows
diagrammatically one arrangement of connections between
the two reservoirs and the compressor; fig. 4 shows a
second and analogous arrangement; fig. 8 shows a third
arrangement which allows a reduction in the number of
cocks ; fig. 11 shows an arrangement particularly applicable
in case where there are considerable intervals between
periods of consumption of the compressed air. (Five
claims.)

25471 (1912). Improvement in Ore Crushers. E. A. Wall,
of Utah Savings and Trust Building, Salt Lake City, Salt
Salt Lake County, Utah, U.S.A.—This invention relates to
ore crushers of the roll type. The object is to provide
means whereby fragments of rock and mineral orefi ranging
in size from 4 to 12 or more inches in diameter may be
broken into particles of 1 and li inches diameter and smaller
by impact of hammer-like blows imparted from projecting
ribs or bars upon the rotating rolls and by subsequent
pressure between the intermeshing teeth of said rolls. To
accomplish this result there are constructed and mounted in
heavy frames one or more pairs of rolls similar in all respects
to the corrugated crushing rolls patented in Great Britain
March 21, 1911, No. 7051, except that instead of the rounded
ribs there shown the rolls are provided with approximately
square-shouldered, tooth-like ribs, preferably of alternately
differing lengths and widths, as shown on the drawings.
But these inner shorter teeth may be omitted and the other
teeth be spaced a greater or less distance apart, according
to the size to which the rock or ore is to be reduced. If a
coarse product is desired, the teeth should be placed several