806

THE COLLIERY GUARDIAN.

April 9, 1914.

has been found that in ordinary cases the temperature is
preferably kept between 40 degs. Cent, and 50 degs. Cent.,
but according to the high or low ammonia content of the
gases the temperature may be varied above or below those
limits. There are many means of attaining this object—
for example, by warming the mass in suspension before
introduction into the purifier, or by warming the purifier
from the exterior, or by conveying the heat to the purifier
by reheating or superheating the already cooled gases or
by a combination of two or more of these means. If the
separation of the tar is effected below the natural dew-point
of the gases for water, it is imperative further to treat the
resulting ammonia-containing condensates in a distilling
column, and to convey the ammonia vapour to the gas
again in so far as it may be desired—for example, to
combine the process with a so-called direct ammonia-
recovery process. In this case the heat of this ammonia-
containing vapour from the distilling column may be used
in a specially economical manner if the vapour is again
mixed with the gas immediately before the purifier or in it.
An exceptionally economical method of working is attained
if the heat contained in the gas is, without further complica-
tion, used to produce the temperature necessary for the
process in the purifier, that is to say, if the separation of
tar is effected in the gas while still warm, and the gases
introduced into the purifier while still warm. In this case
all condensates separating out beyond the purifier are free
from cyanogen, sulpho-cyanide, and sulphuretted hydrogen.
They contain only ammonia, and the waste liquid arising
from the treatment of these condensates therefore may be
allowed to run into river courses without danger. (One
claim.)

12902 (1913). Improved Self-adjusting Back Centre and
Brake for Rock and the like Hand-drilling Machines. J. E.
Brown, 74, Psalter-lane, Sheffield.—Relates to improvements
in the known self-adjusting back centres and brake devices
for regulating the feed action of drilling machines operated
by hand for drilling rock and the like; it consists in

removing the thrust of the claw from the retaining pin to
the back of the claw, and providing an annular groove in
the barrel for the grip of the brake jaws. Fig. 1 is an
elevation of the device with a portion of the barrel; fig. 2
section on line x—x fig. 1; fig. 3 side elevation of fig. 1;
fig. 4 top part of device partly in section, showing the end
of barrel with annular path. (Three claims.)

13794 (1913). Improved Means for Converting Rotary
Movement into Reciprocating Movement for Operating Double-
acting Ram Pumps. H. Dollman, 3, Hillcrest-road, Moseley,
Birmingham.—The invention is comprised in mounting
upon a hollow shaft a pulley or the like, having preferably
formed integral therewith on each face a spiral cam which
upon rotation contacts with two fixed spiral face cams to
impart reciprocating motion to the hollow shaft, said hollow
shaft being mounted on a non-rotating spindle, said spindle
being arranged to reciprocate with the hollow shaft, but not
rotating therewith. Fixed to the ends of the said spindle
are the pump rams which operate within the cylinders of
the pump, thus forming a more effective joint at the glands
of the pump rams and cylinders. More particularly the
part which is to be simultaneously rotated and reciprocated,
and which is supported in suitable bearings, has mounted
on it a pulley or toothed wheel on each of the two faces of
which there is a face cam, preferably semicircular; and
fixed on the opposed faces of two adjacent stationary
parts (between which the pulley or wheel and its face cams
revolve) there are two similar corresponding semicircular
spiral face cams, so arranged that as the pulley or wheel
and cams thereon revolve the spiral-inclined surface of the



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cam on one face of the pulley acts against the spiral face of
the corresponding stationary cam, thereby moving the
pulley or wheel and the shaft or part on which it is mounted
longitudinally in one direction for a certain distance, and
then the spiral cam on the other face of the pulley or wheel
acts against the inclined face of the other fixed spiral cam
and the pulley or wheel with the spindle or part on which
it is mounted are moved in the opposite direction. Thus,
combined rotary and reciprocating movements are imparted
to the pulley or wheel and its cams and the shaft on which
it is mounted. The said shaft on which the pulley or wheel
and its cams are mounted is a hollow shaft adapted to

revolve between collars on a non-rotating shaft, which latter
does not revolve, but has the required reciprocating move-
ment imparted to it by the pulley or wheel and revolving
shaft as aforesaid. Fig. 1 is a front elevation partly in
section of a double-acting ram pump constructed in
accordance with the invention; and fig. 3 is a plan with the
rotary part removed so as the better to show the two
stationary spiral face cams. (Two claims.)

15286 (1913). Improvements in Joining or Bonding the
Junctions of Metallic Sheathing or Armouring of Electric
Conductors. L. Sunderland, of 47, Victoria-street, London,
S.W.—Relates to an improvement on or modification of the
invention described in prior Patent No. 22550 of 1911. The
accompanying drawing shows four two-wire sheathed cables
bonded according to the invention, and in readiness for

joint-box attachment. The eyelets c used for joining the
overlapping ears, lugs or other portions a1 of the metallic
sheathing or armouring a are employed in a similar manner
to the previous invention hereinbefore specified. The top
or bottom thereof (or both top and bottom) are formed with
a cap or cover. Thus, when the eyelet c is placed in position
to secure the flanges a1 of the sheathing a together, such
cap or cover or caps or covers can be turned down on the
top or face of the eyelet c and forced by the punching tool
tightly on to its seating so that it is pressed partly into the
hole in the eyelet c closely to the edge or face of same.
The advantages of the caps or covers are that the metallic
sheathing a at the bond is rendered mechanically stronger
by replacing the circular disc of metal which previously is
removed by punching the holes for the reception of the
eyelets; further, in certain systems where the sheathing is
used as a conductor, additional material is furnished for
conducting the current. (Two claims.)

• 18204 (1913). Improvements in Hand Drilling Machines
for Use in Mines. P. Marrow, Welsby House, Wigan-road,
Standish, near Wigan, Lancashire.— Has reference to
improvements in hand drilling machines for use in mines,
and refers to that type or kind in which the connection
between the screw on which the drill is mounted and the
drill proper is effected by providing a nut or the like, split
or divided longitudinally and made to embrace or surround
the screw in a manner which may be adjustable and which
will then be held within the end of the drill, in such a way
that as long as pressure is applied to the drill by working it
the screw-divided.nut and drill proper will be held firmly
as one, but which may easily be taken to pieces when the
pressure is released. The accompanying drawing is a
horizontal section. The nut a, a1 fits somewhat loosely into
a box b of square shape which forms the end of the drill
proper c remote from the head, the drill itself being hollow
for the greater part of its length in the usual way. The
box b and the barrel of the drill proper c are made of one
piece of meta], and at the point where the box and barrel
meet is a shoulder or ledge within the box b, and when the
parts a a1 of the nut are put in place, they will rest on the
shoulder or ledge and thus remain standing or resting quite
evenly with reference to each other. The nut a al may be
placed either end up into the box b, and it may be put
around the screw on which the drill will be mounted first,
and the whole lot slipped into the box b. (Two claims.)

No. 18204 (1913).

C

No. 22189 (1913).

22189 (1913). Improved Method of and Apparatus for
Draining and Concentrating Coal and other Slimes and
Materials of a like Nature. S. Hunter and the Simon-Carves
By-product Coke Oven Construction and Working Company
Limited, both of 20, Mount-street, Manchester, Lancashire.
—Relates to improvements in that method of and apparatus
for draining and concentrating coal and other slimes and
materials of a like nature involving the return to the
washed material for further filtration thereby of the slime
which has previously been separated from such material.
The slimes from the washed material have their finer com-
ponents separated from them by sieving, and such finer
components only are returned to the washed material for
filtration thereby, instead of the whole of the slimes being
so returned (after suitable draining if desired), as has before
been proposed. Furthermore, the slimes which are so
returned to the washed material according to the invention
are returned to such material while it is passing over its
primary sieve, and not to the material after it has passed
away from such sieve, as has been previous practice.
The accompanying drawing illustrates diagrammatically
apparatus disposed according to the invention. (Four
claims.)

22282 (1913). Improvements in Safety Suspension Mecha-
nism for Mining Cages or the like. E. J. Horsley, of 134,
W argrave-road, Earlestown, Lancashire.—Is particularly
directed to improvements in that type of safety suspension
mechanism in which projections or catches, pivoted on the
cage and operated by springs or the weight of their own
link gear, are adapted, on the breaking of the cage rope, to
be rotated outwardly and engage with the usual transverse
bearers disposed at intervals across the sides of a mine shaft.
According to this invention a pair of pivoted arms on the
cage are adapted, when the cage is supported from the
suspension rope, to take up an oblique position, their ends

clear of the transverse bearers disposed at intervals down
the wall of the shaft. These pivoted arms are connected by
links to a cross piece or the like slidable in a slotted housing
to which the lifting tackle is connected, the limit of vertical
movement of the cross-piece in the housing determining
the engaged or disengaged position of the pivoted arms, these
latter coming into operation on the breakage of the rope either

by the weight of their connecting gear or being assisted by
springs. The invention is shown in the accompanying
drawings, in which fig. 1 is an end view of a mining cage,
the projecting arms being shown in their normal retracted
position. Fig. 2 is a fragmentary view analogous to fig. 1,
but showing the arms in their engaged position. Fig. 4 is
a plan view of the cage suspension mechanism, partly in
section. (Two claims.)

23021 (1913). Improvements in Apparatus for the Resuscita-
tion of Asphyxiated Persons. R. H Davis, 187, Westminster
Bridge-road, London, and L. E. Hill, F.R.S.M.B., Osborne
House, Loughton, Essex.—Relates to that class of apparatus
comprising a mask or the like designed to be applied over
the mouth and nose of the patient, and an air delivery and
suction pump in communication with the said mask, and by
means of which the poisonous air is withdrawn from the
lungs of the patient during the suction stroke of the said
pump, and fresh air or air and oxygen delivered thereto on
the delivery stroke of the pump. Use is made of a mask

ng 2.

which is fitted with a flexible bag or sac in which is inserted
the end of a pair of forceps, the said bag or sac, where the
mask is applied over the face of the patient, being then in a
position to receive the tongue which is pulled out by the
forceps, so as to be lodged therein. The tongue being thus
contained in what is actually a portion of the mask, no
leakage of air can occur around it. A mask made as
described is connected by delivery and suction pipes to the
delivery and suction ends of a pump or like device, which
is preferably of the kind described in Specification of
Application No. 16822 of 1913. Fig. 1 is an elevation of a
mask made according to the invention. Fig. 2 is an elevation
at right angles to fig. 1. (Two claims.)

24707 (1913). Improvements in Mining Machines. A. Dehu,
16, rue Maraichere, Brussels, Belgium, and E. Pestiaux,
Place de FHotel de Ville, Tamines, Belgium.—Relates to
mining machines which comprise a pair of parallel drilling
or boring tools and a shaft provided with picks or cutters
and arranged between and in rear of the tools, the shaft

being geared with the spindle of one or both of the tools
so that when the latter are suitably operated the shaft will
also turn. It consists in improvements according to which
the boring tools and cutter shaft are mounted on a carrier
which is adapted to slide to and fro in guideways formed
on a istationary base member, and means are provided for