642

THE COLLIERY GUARDIAN.

September 24, 1915.

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

35 (1914). Improvements
and like Cutting Machines.

strasse, Nuremberg, Ger-
many.—Relates to im-
provements in rock drill-
ing and other cutting
machines, in which the
movement of the hammer
piston is operated by the
pressure and suction
action of a single-acting
air pump. According to
the invention, an exhaust
valve is arranged in the
hammer cylinder, which
allows the compressed air
to escape immediately
after the hammer piston
has been moved forward.

The accompanying drawing
cylinder, and on the right

in and relating to Rock Drills
A. Berner, of 35, Sulzbacher-

c

shows on the left a hammer
hand a pump cylinder. (Four

claims.)

’s safety lamp, consisting of a

2

-10

•s



10400 (1914). Improvement in and connected with Means
for Detecting the Presence of Injurious Gases in Mines and
like places. The firm Schoeller and Company, of 108.
Morf elderlandstrasse, Frankfurt-on-Main, Germany; and M.
Albrecht, of 100, Gunthersburg Allee, Frankfurt-on-Main.—
Relates to apparatus for indicating changes in the gaseous
conditions of the atmosphere, and employs the arrangement
in combination with a mine
diffusion chamber covered
with a porous plate, and
connected with one limb of
a U-tube filled with liquid,
so that owing to the rise or
fall in pressure produced in
the diffusion chamber by
gaseous changes, the level
of the liquid in the tube is
displaced as in a manometer.
According to this invention,
a thread of liquid is em-
ployed in the tubular system
of so small a mass that it
can only be moved out of
position very slowly by
mechanical shaking; the U-tube is arranged in the path of
the rays of light from the miner’s lamp carrying the
apparatus, and its cross section is so large, in contra-
distinction to a capillary tube which is known in this kind
of instrument, that when an indication is given, the liquid
is readily driven from one limb of the U-tube, and the gas
passing round the bend of the tube bubbles through the liquid,
and gives the appearance of boiling, which is very effective
if coloured liquid is used and viewed by transmitted light.
If this apparatus is used with any care, the liquid will not
run out of the tubular system. However, all risk of this can
be avoided if the tube is formed with traps for retaining the
liquid at the ends, so that the liquid slowly flowing down is
caught in these traps. In the drawing an example of con-
struction of the invention is illustrated, in combination with a
miner’s safety lamp in cross section. (Three claims.)

10776 (1914). Improvements in and relating to Dumping
Receptacles. Fried. Krupp Aktiengesellschaft, of Essen,
Germany.—Relates -to dumping receptacles or self dis-
chargers according to Patent No. 21447/13, and the object
is to so arrange the construction thereof that when the
swinging bottom moves over out of the discharging into the
loading position the whole of the parts which move during
such action are at least approximately in indifferent
equilibrium, in order to reduce to a minimum the expendi-
ture of force necessary to move the bottom. Fig. 1 is a
transverse section through the wagon in the state of being
ready to be loaded; and fig. 2 is a section corresponding to
fig. 1 of the wagon in the discharging position. If the
arrangement be so contrived, as is supposed in the con-
structional example described, that the point q falls in the
above-mentioned longitu-
dinal axis of the bottom,
which is guided approxi-
mately horizontally, the
point q moves approxi-
mately in a horizontal
straight line during the tilt-
ing movement of the
bottom. Consequently, the
common centre of gravity s2
must also move more
approximately in a hori-
zontal straight line, as it
is at an invariable distance
from the point q in a con-
stant direction. The mov-
able system formed by the
bottom and the side wall G

p

CJ

-c*

is therefore situated, in
every position of the
bottom, in approximately
indifferent equilibrium. The
action of the remaining
movable parts on the state
of equilibrium of the entire
movable system, formed by
the parts B, C, G, D, D1,
is only small. Moreover,
this action can be easily
compensated by a trifling
lateral displacement of the
connecting rods D and D1.
Owing to the parallel guid-
ing of the side wall C, it

C
s'-

o <L

”s

can therefore always be ensured with great approximation,
that the entire movable system is approximately in
indifferent equilibrium in every position of the bottom B.
The bottom B can therefore be swung back out of the dis-
charging position in to the loading position without any
great exertion, by pulling on the handles c1. This position
is attained at the instant in which the side wall C (which,
during this movement swings downwards) catches with its
shoes c2 over the supporting columns a2 from above, and is
thereby prevented from swinging further downwards. By
rotating the hand lever H the side wall Cs is then swung
back into its vertical closing position, in which it catches

Vaucouleurs, Paris, France.-

19



under the bottom B by means of its lugs c*, and secures it
against any unintentional opening movement. (Three
claims.

16668 (1914). Improvements in Hydrocarbon Miners'
Lamps. J. Goulet, formerly of 25, rue du Fersil, Brussels,
and now of No. 7, Rue de
Relates to miners’ lamps,
and is an improvement in
or modification of the inven-
tion of prior Letters Patent
No. 28685/10. The object
is to prevent the temperature
of the hydrocarbon reservoir
from being raised consider-
ably under the influence of
the heat produced by the
lamp itself. A further
object is to provide a hydro-
carbon reservoir of such
form that it constitutes the
handle of the lamp for the
purpose of making the lattei
more easy to handle. The
improved lamp comprises a
preferably cylindrical hydro-
carbon reservoir filled with
fluid absorbing materials,
and arranged adjacent to
the lamp proper within
an air jacket, the upper

part of which is connected to the lower part of the bonnet
of the lamp, for the purpose of causing hot air to flow through
said jacket and gently heat the hydrocarbon reservoir, whilst
the hydrocarbon vapours escaping from the reservoir through
an adjustable orifice at the lower end thereof, meet with said
hot air to be mixed with same before reaching the burner
through a pipe connected to the lower end of said air jacket.
The invention is illustrated in the accompanying drawing,
which shows a vertical longitudinal section of the improved
lamp. (Two claims.)

20689 (1914). Winding and Haulage Drum. C.
Davenport, of the Aztec Works, Neepsend, Sheffield, York-
shire. — Relates to an improved winding or haulage drum
which is driven internally by an electric motor of suitable
type, independent of the drum, and whereby an entirely self-
contained and compact hauling device can be produced, to
which it is only necessary to convey current, all the working
elements being located within the drum proper, without
requiring any end standards for the purpose of combining
with the drum for enclosing purposes. The present develop-
ment follows upon the subject matter of a former British

b

_jL

mm

patent, No. 1355/13. The invention consists in the use of a
complete rotatory enveloping drum which revolves as a com-
plete. entity and itself entirely encloses the contained parts,
and is properly supported and divided by a partition or wall
into two separate and distinct compartments, to one of which
is allocated the electric motor, of which no part is in con-
nection with the drum, whilst the other contains the entire
gear only, and in which second compartment the entire gear
can run in oil and be properly isolated from the motor com-
partment. Fig. 1 shows a front view of said electrically-
driven haulage drum, the view being mostly in section; fig. 2
is an end elevation. (Three claims.)

19933 (1914). Improvements in Binding Compounds for
Briquetting and the like. A. C. Evans, of Lucerne House,
Hampton Wick, Middlesex; and P. J. Mitchell, of Caxton
House, Westminster, London, S.W. — According to this
invention, a binding material is produced from coal tar or
mineral oil products without the necessity for prolonged and
complete distillation. Further, a greatly increased yield of
binding material from a given quantity of tar is obtained as
compared with the amount of pitch which the tar would
yield in the ordinary way. The phenols removed in the
earlier distillation are not re-introduced into the product, and
the process also provides means for regulating the ultimate
consistency and binding properties of the finished product.
The starting out material is preferably coal tar in the condi-
tion in which the same is usually obtained from gas works,
except that most of the ammonia may have been removed
from the tar before use. The tar is distilled at a tempera-
ture of 270 degs. in a suitable retort or still. The latter
may be of any convenient type, but should be fitted with a
manhole capable of being hermetically closed, and should
further be provided with a mechanical stirring device. The
heating arrangements consist preferably of a furnace pro-
vided with the usual flues, which should be so arranged that
the heat can be shut off at any desired moment, so as to
allow the contents of the still to cool. The distillation is
carried on until the light oils have been removed, but not to
such a point that the anthracene grease passes over. The

heat is now shut off, and the contents of the still allowed to
cool to a temperature below 250 degs. Cent. This tempera-
ture should be as near 250 degs. Cent, without actually reach-
ing it as possible. Coal dust or hydrocarbon soot, i.e., soot
containing volatile matter, in an impalpable form, is now
gradually added and stirred into the mass. The coal used
should preferably be of high volatile contents, and the amount
added may be varied according to the density and hardness
of the finished product required. For a briquetting material,
from 2| to 15 per cent, of coal or hydrocarbon soot is a
working margin. As soon as the whole of the coal or soot
has been added, the manhole is again closed, and the tempera-
ture raised to a minimum of 270 degs., stirring being con-
tinued the whole time; the contents is kept at that tempera-
ture, or not lower than that temperature, until the added coal
or like material begins to soften and give off its volatile
contents. As soon as this action starts, the heat is imme-
diately shut off, and the material is allowed to cool as rapidly
as possible to a temperature below 100 degs. Cent. At this
stage 0-25 to 1 per cent, of sulphuric acid of a preferred
strength of 170 degs. Twaddle, is gradually added and inti-
mately mixed with the material, and if this operation is
carried out in a second tank the latter should be provided with
suitable stirring or agitating means. After the acid to its
measure has been added and thoroughly stirred in, the hot
mass is run off and allowed to cool and solidify in any suit-
able moulds or other receptacles convenient for the purpose.
(Six claims.)

23084 (1914). Improvements in or relating to Coal and
like Conveyors. S. A. Ward, of Wybourn, Sheffield.—
Relates to coal and like conveyors of the reciprocating trough
type, its object being to provide improved means for con-
necting together the trays or sections forming the trough,
such that the trays may be readily detached from one another
and reconnected when required, as when it is desired to
move the conveyor laterally into a new position. Fig. 1
is an end view, with one side in section, of a tray or section
of a conveyor trough; fig. 2 is a sectional plan of one side
of fig. 1, showing also the end of an adjacent tray; fig. 3
is a side view showing the adjacent ends of two trays con-
nected together; fig. 4 is a sectional plan of fig. 3 at right
angles to the side of the tray; fig. 5 is a similar view but
with the clip removed; and fig. 6 is a similar view to fig. 3
illustrating a slight modification. In carrying out the
invention, straps or the like, 1, 2 are riveted or otherwise
secured to the underside of each tray or section 3 near the
ends thereof. For each tray the strap 1 at one end projects
somewhat beyond the end edge of the tray as shown in
fig. 2, and at the other end the tray 3 extends for a similar
distance beyond the strap 2 at that end. Thus, when the
trays are assembled the end edge of one overlaps the strap
1 of the other, and so dust is prevented from falling through
the tray junctions of the trough. Lugs 4 are formed on or
secured to the straps 1 at their outer edges near their
ends, and the straps 2 are also provided with similarly
situated lugs 5, the lugs being so disposed that when the
trays are assembled the lugs 4 and 5 at the adjacent ends of
trays adjoin one another, their side edges preferably abutting
as shown in figs. 4 and 5.
The other or outer side
edge of each of the lugs
4 is preferably tapered as
shown, the widest part
being at the top. The
lugs 5 may also be
tapered, but preferably
their side edges are
parallel to one another
ing edge of the lug 4
when the parts are
assembled. Clips 6 are
provided adapted to em-
and also to the adjoin-
brace each adjoining pair
of lugs 4, 5, and to fit
their outer side edges,
the conveyor trough being
supported by those clips
6, which are either sus-
pended from above or
supported on rollers or
the like from below.
Tapered lug 4 will be
limited in its downward
movement (relative to

the clip) by the correspondingly tapered side of the clip. The
other lug 5 is preferably not tapered at all, or not so much, in
order that it may be free to descend until the end edge of
the tray to which it is attached rests upon the projecting
strap 1 of the adjacent tray, and so a dust-tight joint between
the trays is obtained. Means are provided for holding the
clips 6 in engagement with the lugs 4 and 5. In the con-
structions illustrated this is effected by dovetailing or
bevelling the outer side edges of the lugs 4 and 5, and the
corresponding fitting parts of the clips, as shown at 7 and 8
respectively. In the construction shown in figs. 1—5 both
side edges of the lugs 4 are tapered, and the lugs 5 are
disposed at a corresponding angle (fig. 5) in order that the
adjoining side edges of the lugs may be parallel when the
trays are assembled. The engaging parts of the clips 6 are
therefore equally tapered and thus it will be appreciated that
the one pattern of clip will equally well fit the pairs of lugs
on both sides of the trays. When, however, the adjoining
side edges of the lugs are parallel with the end of the tray,
as shown in fig. 6, the clips designed for one side of the
conveyor would only fit the other when placed skew-wise,
unless both lugs were equally tapered on their outer side
edges. If desired, the straps 2 may be dispensed with by
forming or securing the lugs 5 to the tray itself, and the
straps 1 may also be replaced by projecting lugs or the like
to support the end of the adjacent tray. As a further
modification, instead of tapering the lugs and clips, the latter
may be provided with other means for engaging the lugs 4,
such as a flange or other projecting part at the lower portion
adapted to come into contact with the lower edge of the
lugs 4 or otherwise to support them. (Four claims.)

22012 (1914). Improvements in Attachments for Rock
Drills for Supplying Water thereto. C. Hansen, of Chiltern
Chambers, 55, Commissioner-street, Johannesburg, Trans-
vaal, South Africa.—The objects are to provide an attach-
ment which will lend itself to the quick and easy disengage-
ment of the water supply pipe from the machine, and so
facilitate the removal of the drill, bit, or steel; to ensure that
a practically watertight joint shall be made between the
water supply pipe and the bit, drill, or steel; to supply means
which shall not be unduly susceptible to the vibration set up
by the rock drill when in operation, and so be worn out
quickly as a result of such vibration, and, if desired, to