Improvements in and connected with Swinging and Shaking Shoots. and Screens.
Year: 1892

page_text: Date of Application, 10th Aug., 1892
Complete Specification Left, 8th May, 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by HEINRICH SCHÜCTERMANN and CARL JOSEF
KREMER, of Dortmund, in the Empire of Germany, Engineers.]
Improvements in and connected with Swinging and Shaking Shoots.
and Screens.
I, HENRY HARINGTON Leigh, Assoc. M. Inst. C.E., Fel. Ch. Inst. P.A.,.
practising as Phillips & Leigh, at No. 22, Southampton Buildings, Chancery
Lane, in the County of Middlesex, Engineer and Patent Agent, do hereby declare
the nature of this invention to be as follows:-
This invention relates to improvements in and connected with swinging and
shaking shoots and screens and its object is to make improved provision for
receiving the coal or other material as directly as practicable from the tip so as to
minimise the percentage of broken coal for screening the coal automatically, for
the processes of picking and sorting being carried out easily and effectually during
the time that the said screening is being carried out, and for the removal of the
small coal.
In carrying the invention into effect, there is provided a shoot the head of which
stands underneath the centre of the tip and as near to it as is or may be convenient.
This head receives a constant elliptical or analogous movement through suitable
mechanism. This movement may be continued throughout the shoot to its foot or
may be caused to gradually merge into an oscillatory one therein by suspending it.
from a freely swinging arm.
I
The path of the mixed material fresh and raw from the pit, is delivered from the
tip, not smash down on to the shoot-head, but an intermediate conducting shoot is.
provided of a straight or curved shape in elevation. Its curves are set out in such
a way that as the material leaves the tip it contacts with the intermediate shoot
without shock, and slides down it, the motion of ejection from the tip gradually merging
into one of sliding down the intermediate shoot, and the direction of the slide gradually
merging into the normal plaue of the shoot. The shoot itself has its surface made.
with suitable perforations, in fact its surface is that of a screen. As the material is
shaken down the latter, it is picked and sorted under the most convenient circum--
stances which it is practicable to provide. A travelling belt or carrier is provided
under the screen which receives all the small coal which drops from the latter.
Dated this 6th day of August 1892.
HENRY H. LEIGH,
Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in and connected with Swinging and Shaking Shoots:
and Screens.
I, HENRY HARINGTON LEIGH, Assoc. M. Inst. C.E., Fel. Ch. Inst. P.A.,.
practising as Phillips & Leigh, at No. 22, Southampton Buildings, Chancery
Lane, in the County of Middlesex, Engineer and Patent Agent, 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 :-
This invention relates to improvements in and connected with swinging and
shaking shoots and screens, and its object is to make improved provision for
receiving the coal or other material as directly as practicable from the tip so as to
minimise the percentage of broken coal, for screening the coal automatically, for
ID 7 I

page_text: the processes of picking and sorting being carried out easily and effectually during
the time that the said screening is being carried out, and for the removal of the
small coal.
In order that the invention and the best means of carrying it into practical effect
may be thoroughly understood, I will now describe it and them in detail, referring
in so doing to the accompanying drawings which are to be taken as part of this
Specification and read therewith.
Fig. 1 is a sectional longitudinal elevation.
Fig. 2 is a plan omitting the tip.
1
The tip a is of the circular type described in my previous Patent No. 12187
1891.
is the fixed intermediate conducting shoot. Its function is to receive the
contents of the tip from the latter as it is revolved and to deliver them on to the
head of the screen c below; and the object of the present invention with respect
to this shoot is to provide for the large coal reaching the screen c without being
broken on the way.
The shoot bis fixed at only a short distance outside the arc
through which the adjacent edge of the waggon passes during the process of tipping.
The upper portion of it is vertical but the remainder of it follows the said arc for
about a sixth of the circle, when it slopes downwards in a plane more or less
parallel with that of the head of the screen c next described.
c is a combined swinging shoot and screen. It is a shoot in virtue of its
inclination, the angle of which with the horizontal is less than that of its head c
which latter occupies a position immediately under the bottom of the shoot 6 and
as close to it as practicable. When the screen c is at rest, the centre of its head c
is under the edge of the shoot b. The large stuff will therefore get on to the latter
from the waggon with a minimum amount of bumping, and slide down it. By the
time that it reaches the screen head, it will be moving in a direction almost parallel
with the slope thereof, in other words the motion of ejection from the waggon is
gradually merged into one of sliding down the intermediate shoot b, and the
direction of the slide into the normal plane of the screen c.
The swinging motion of the screen c is provided for by means of eccentric
sheaves d which are rotated by any suitable means within straps d' which are made
fast to the top end of the screen. The opposite or lower end is hung from links d
pivotted at fixed points d'.
Any suitable collector or shoot or other device for receiving and disposing of
the small stuff which drops through the screen may be provided under the latter.
e is a travelling belt upon which the large stuff is delivered from the tail of the
screen and where the hand picking is conducted or continued.
Having now particularly described and ascertained the nature of the said inveu-
tion and in what manner the same is to be performed, I declare that what I
claim is,
The combination of a swinging combined shoot and screen with a travelling belt
adapted to provide for the more convenient conduct of the process of hand picking
the stuff dealt with, as set forth.
Dated this 8th day of M. 1902
H. H. LEIGH,
Chartered Patent Agent.