Improvements in Apparatus for Dressing and Loading Coal or other Minerals.
Year: 1891

page_text: Date of Application, 30th Oct., 1891
Complete Specification Left, 2nd Aug., 1892-Accepted, 29th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Dressing and Loading Coal or other
Minerals.
We, WILLIAM OUTTERSON WOOD of South Hetton, in the County of Durham,
Mining Engineer and CUTHBERT BURNETT of Fallowfield, South Hetton,
aforesaid, Engineer do hereby declare the nature of this invention to be as
follows:-
:-
The objects of this invention are mainly to economise labour and minimise the
breakage of coal and other minerals while screening and while loading into railway
trucks.
In the jigging screen we dispense with the usual hopper or shoot and the trap for
regulating the flow or delivery of coal to the screen from the hopper or shoot into
which the tippler delivers the coal and we instead thereof extend the upper part of
the screen bars so as to come directly under the tippler and adjust this upper part
or end to such an angle that at the normal speed required for screening the coals
the latter may pass off on to the lower or main portion of the screen at a suitable
speed to ensure proper screening and to meet the special or particular requirements
of each kind of coal. We much prefer to use bars instead of a plain surface but
we may use the latter or a screen made of perforated plate or a woven screen or any
other analogous arrangement. By this arrangement the man at the present trap is
dispensed with.
We provide the belt with a jib or flexible part at the delivery end. This jib is
adjusted to a suitable angle for conveying the coals into the trucks or waggons
direct without appreciable amount of breakage even in the case of tender coal.
When the waggons or trucks have to be changed it will only be necessary to lift
the jib clear of the tops of the said waggons or trucks and during the interval of
changing the coals will be delivered into a shoot and discharged therefrom_auto-
matically when the jib is lowered into the next truck. The belt drum is driven
from the shaft at the upper end by means of a chain belt and pair of sprocket
wheels or through bevel wheels and shafting as may be preferred.
1001
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Dressing and Loading Coal or other
Minerals.
We, WILLIAM OUTTERSON WOOD of South Hetton in the County of Durham
Mining Engineer and CUTHBERT BURNETT of Fallowfield South Hetton aforesaid
Engineer do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
The objects of this invention are mainly to economise labour and minimise the
breakage of coal and other mineral during the operations of teeming, screening and
delivery of the said coal or other mineral to the railway trucks or wagons or other
receptacles.
In the jigging screen we dispense with the hopper or shoot and the trap for
regulating the flow or delivery of coal to the screen from the hopper .or shoot into

page_text: which the tippler delivers the coal and we instead thereof extend the upper part of
the screen bars so as to come directly under the tippler and adjust this upper part
or end to such an angle that at the normal speed required for screening the coal
the latter may pass off on to the lower or main portion of the screen at a suitable
speed with the minimum amount of breakage to ensure proper screening and to a
meet the special or particular requirements of each kind of coal. We much prefer
to use bars instead of a plain or uninterrupted surface but we may use the latter or
a screen made of perforated plate or a woven screen or other analogous arrange-
ment. By our improved construction the man at the present trap is dispensed with.
The coals are delivered from the jigging screen on to an endless cleaning belt made
of canvas or canvas and rubber or a number of plates pivoted together.
We provide the belt at the delivery end with a jib or jib like flexible part.
This jib is adjustable to a suitable angle for conveying the coal into the trucks or
wagons direct without appreciable amount of breakage even in the case of tender
coal. When the wagons or trucks have to be changed it will only be necessary to
lift the jib clear of the tops of the said wagons or trucks and during the interval of
changing the coals will be delivered into a shoot from which they will be discharged
automatically into the next truck when the jib is lowered. We prefer to drive the
belt drum from the shaft at the upper end by means of a chain belt and pair of
sprocket wheels but other analogous arrangement as say through bevel wheels and
shafting may be used or instead of either we may drive the belt from the drum at
the screen end.
Figure 1 (Sheet 1) of the accompanying drawings is a side view of a form of
apparatus constructed according to our invention and shewing the general arrange-
ment of the complete apparatus including tippler, screen and belt the latter with
flexible jib end.
Figure 2 (Sheet 1) is a plan of same.
Figure 1 (Sheet 2) and Figure 2^ (Sheet 2) are continuations of same.
Figure 3 is a side view of the tippler end or coal receiving end of the apparatus.
Figure 4 is a side view and Figure 5 an end view of the jib or discharge end of
the apparatus.
There are two lines of shafting marked a and a respectively. We show as an
example a tippler T of the form described in the Specification of our Patent
No. 4534 of 1891. It is worked by shaft a the shaft a' being driven from the
shaft a through say belt, chain or toothed gearing. Any other suitable tippler or
other discharging apparatus may be used.
b
.
The jigging screen k and the belt I are driven from shaft a' the screen k by means
of two eccentrics m and the belt preferably by rope gearing the pulley 6 being the
driver and the pulley at outer end of belt the driven one; c is a guide pulley and
da tension pulley which is arranged in suitable sliding bars n' with adjusting
screws n² for securing the necessary tension of rope for driving the belt; suitable
toothed gearing is provided as shown at o o' o² o³ for reducing the speed to meet the
required rate of travel of the belt.
The use
The coals from the tippler T Figure 3 fall on to a teeming plate i (or it might
be a grating but we prefer a plate) which checks the force of the fall and thereby
avoids breaking of the coals. With this plate the coals are gently laid on to the
jigging screen k and the drawback to existing arrangements is overcome.
of the plate is equivalent to the tubs having a high side.
Instead of the tippler
discharging the coals into a hopper with trap as heretofore usual the said tippler in
its rotation passes a portion of the coals over the fixed bars; and the remainder are
deposited on to the upper portion of the screen from whence they are shaken or
jigged on to and over the bars k¹ and on to the belt where they are cleaned and
are carried on over the jib y into the trucks or wagons placed at the end of the jib.
The bars k can be adjusted by the notches * to a suitable angle for securing the
proper delivery or feed to the lower portion of the screen. Where it is required to
make more than one class or size of coal over the screen additional sets of screens
or riddles to suit the various sizes may be used as hitherto.

page_text: In Figure 6 is shown an arrangement for raising the top set of bars k auto-
matically as an alternative arrangement to the fixed bar arrangement. The weight v
at end of lever is not sufficient to support the weight of the coals and hence the
bars & will fall to stop in a horizontal position or lower if desirable. After a portion
of the coals have been jigged off the weight v will overcome the weight of the coals
left and will raise the bars k and so effect a clearance of the coals. The chain
which carries the weight v passes over the segment * of elliptical form so that the
leverage is reduced as the weight v drops.
Figure 7 shows a dumbing arrangement for delivering unscreened coals onto the
cleaning belt. It consists of a plate or plates and for covering the bars of
the jigging screen the plate a being by chains connected to a winch y having a
drum y of two diameters the larger portion for the outer end of the plate and the
smaller for the inner end. For the purpose of covering the fixed bars at the back
of the screen hopper a separate plate is used which is hooked over the top of
back of hopper as shown. The plate r is also hooked or hinged on when in use.
The plate when not in use is raised into the dotted position. Although only
one set of screen bars is shown we in some cases arrange the same in combination
with other bars or riddles so as to produce the several or required kinds of coal
at one operation as is well known.
At the end of the fixed portion of the belt framing p is the shaft f which passes
through the sides of the said belt framing and also through one end of the jib q.
This shaft fis driven by means of the spur wheels o, o¹, 03, 0³, from the shaft g
immediately below and is fitted with two sprocket wheels one on either side of the
belt. e is a friction clutch for starting and stopping the belt as may be required.
At the end of the jib is a drum with its shaft h also provided with two sprocket
wheels and geared by means of chains to those on shaft f. The outer end of
the jib g may be supported by means of a chain or chains with counterweight s
Figs. 4 and 5 to nearly balance same and with winch r as here shown for raising
and lowering the jib q. Instead of a winch a rack and pinion or a cylinder with
piston operated by fluid pressure may be employed to work the jib either direct or
through gearing but the arrangement here shown answers well and is simple.
t Figures 4 and 5 is a shoot or hopper arranged in connection with the jib q and
intended for receiving the coals passed over the belt during the interval of changing
the wagons. The jib is then by the winch r or by other means raised into the
dotted position whereby the shoot t is also swung into the dotted position ready to
receive the coals. a is a pipe provided with steam jet cock and nozzle a³ for
inducing a current or draught in the pipe a² and through the screen bars in order to
withdraw the dust in the case of dusty coals.
Another method is shown in Figure 8 where the jib is lowered to near the tops
of the trucks or wagons in which position it is allowed to remain so long as the"
wagons or trucks if approximately of uniform height are being filled and during the
interval a tray w preferably of wood is rested on the top of the filled and
following empty wagon and the coal deposited hereon is emptied into the latter.
Fig. 9 shows an arrangement of tray or shoot t¹ supported by a chain and
counter weight and guided on curved sliding bars whose radius is described from
centre of shaft f. This tray or shoot is preferably made of flat hempen or steel
rope or other analogous flexible material in combination with a metallic plate to
which the softer material is attached. When in the position as shown the coal.
or other material as it leaves the end of the jib passes in to and over the tray
into the truck, wagon or other receptacle.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
First. The application and use in connection with apparatus for dressing or
cleaning coal or other minerals of jigging screen bars (or a plain or perforated
plate) immediately below the rotary tippler or other coal discharging appliance

page_text: without the employment of the usual hopper and trap and placed adjustably at
such an angle thereto and to the shoot wherein the screen works that the coals
by a suitable jigger speed may pass off along the screen shoot at a convenient rate
with minimum amount of breakage substantially as described and shown.
Second. In a jigger screen shoot the application and use of a teeming plate such
as i for breaking the force of the fall of the coal or other minerals and thus
especially with tender coal preventing the breakage of same substantially as
described and shown.
Third. In combination with appliances as firstly claimed the special arrangement
of detachable dumbing plates such as a ¹ and z for adapting the shoot to the
delivery of coal or other minerals without screening in combination with suitable
means such as a winch with drum of two diameters and chains therefrom to each
end of the plate for raising the same out of the way when not required for
use substantially as described and shown.
Fourth. The application and use in combination with appliances as firstly
claimed of self acting means for adjusting the angle of same substantially as
described and shown.
Fifth. Forming or providing the endless cleaning belt described with a flexible
or jib like discharge end which can be adjusted to the proper angle for the coal
delivery and raised out of the way as required substantially as described and
shown.
Sixth. In combination with a cleaning belt jib end as fifthly claimed a hopper
which when the jib end is raised to make room for an empty wagon to take the
place of a filled one is automatically passed into position to receive the coal and
passed out of the way when the jib is again lowered substantially as described and
shown.
Seventh. In connection with a cleaning belt jib end as fifthly claimed the
application and use of a tray resting on top of filled or following empty truck or
wagon on to which the coal is deposited during the interval of changing the said
trucks or wagons substantially as described and shown.
Eighth. In combination with the flexible jib end a tray or shoot constructed
preferably of flat hempen or steel rope or other analogous material and attached to
a metallic plate the said tray being balanced with counter-weight and arranged to
slide in a curved guide substantially as described and shewn and for the purpose of
preventing breakage of coal as set forth in Specification.
Dated this 2nd day of Angust. 1892
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.