Improvements in Screening Coals or other Minerals.
Year: 1895

page_text: This print is in accordance with the Original Specification as it stands
after Amendment (under Section 11 of the Patents, &c., Act, 1883), as
required by the decision of the Chief Examiner of the 12th day of May,
1807
Date of Application, 27th Dec., 1895
Complete Specification Left, 26th Sept., 1896-Accepted, 12th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in Screening Coals or other Minerals.
I, FREDERICK BERKLEY, of Lumley Thicks, in the County of Durham,
Mining Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an automatic appliance, which I will call a "shutter,"
for controlling the delivery of coals, or other minerals from the tub or wagon over
the screens with the object of effecting more efficient separation by preventing the
rush of the larger coal, carrying with it over the screens a portion of small. It is
applicable to revolving "tipplers" delivering either from the side or end of the tub,
or may be arranged for the old form of "kick-ups" but I will describe it as for
revolving side" tipplers" making a complete revolution.
66
"
The shutter" is so mounted upon the upper fixed screen that "cam "-shaped
fittings on the "tippler" frame in revolving, act upon such mechanism as will
automatically cause the "shutter "to close and open at proper intervals to arrest
and then gradually to allow the coal to pass under it and close again. This
mechanism may be levers the tail ends of which, fitted with rollers, are pressed
down by the cams which cause them to turn on their fulcrums and gradually
raise and open the "shutter," attached to the opposite ends of the levers and
extending across the whole width of the screen bars, allowing the medium sized
coal to pass under it onto the "jigging" screen. As the "tippler" continues to
revolve the "shutter" is further raised until it is full open, when the large coal can
pass under it, and remains open; meanwhile the "small" has to a great extent
passed direct through the screen bars clear of the large and medium coal. The
commencement of the next revolution of the "tippler" by the action of the "
shaped fittings sets free the tail ends of the levers, and the "shutter" falls and
closes on the screen bars before the coals begin to leave the tub in the "tippler."
As applied to end revolving "tipplers," constructed and acting as in Cook and
Younger's Patent No. 4584 of 1892, the mechanism will be so arranged, with
slight modifications, as to effect the same automatic operation of the shutter as
also when applied to the old form of "kick-ups" which upset and discharge the tub
and return with it empty but do not make on entire revolution. As a further
protection against breakage of coal, in being discharged from the tub onto the
screen, propose to fit upon the "tippler "a sloping shelf or spout down which the
coal will run when the tub is upset instead of falling in a mass.
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cam
"
In connection with revolving 'tipplers" I employ an improved system of
frictional gear by which the usual counter shaft is dispensed with, by driving from
the driven sheave direct to the sheave which revolves the "tippler" on its circular
path by the intervention of a friction sheave which moves into and out of gear with

page_text: the other two by a lever handle, and this action may also be automatically effected
by the "tippler" itself as it reaches in its revolution the proper position.
Dated this 27th day of December 1895.
For the Applicant,
W. LLOYD WISE,
6 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
COMPLETE SPECIFICATION (AMENDED).
Improvements in Screening Coals or other Minerals.
I, FREDERICK BERKLEY, of Lumley Thicks, in the County of Durham,
Mining 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:-
This invention relates to an automatic appliance of the kind in which a "shutter,"
for controlling the delivery of coals, or other minerals from the tub or wagon over
the screens is operated from a kick-up through the media of cams and levers with
the object of effecting more efficient separation by preventing the rush of the larger
coal, carrying with it over the screens a portion of small. It is applicable to re-
volvinge "tipplers" delivering either from the side or end of the tub, but I will
describe it as for revolving side "tipplers" making a complete revolution.
"
"
The shutter" is so mounted upon the upper fixed screen than " cam shaped
fittings on the "tippler" frame in revolving, act upon such mechanism as will
automatically cause the "shutter" to close and open at proper intervals to arrest
and then gradually to allow the coal to pass under it and close again. This
mechanism may be levers the tail ends of which, fitted with rollers, are pressed
down by the cams" which cause them to turn on their fulcrums and gradually
raise and open the "shutter," attached to the opposite ends of the levers and
extending across the whole width of the screen bars, allowing the medium sized coal
to pass under it on to the "jigging" screen. As the "tippler" continues to revolve
the "shutter" is further raised until it is full open, when the large coal can pass
under it, and remains open, meanwhile the "small has to a great extent passed
direct through the screen bars clear of the large and medium coal. The commence-
ment of the next revolution of the "tippler" by the action of the "cam "-shaped
fittings, sets free the tail ends of the levers, and the "shutter "falls and closes on
the screen bars before the coals begin to leave the tub in the "tippler." As applied
to end revolving "tipplers," constructed and acting as in Cook and Younger's
Patent No. 4584 of 1892, the mechanism will be so arranged, with slight
modifications, as to effect the same automatic operation of the shutter. As a further
protection against breakage of coal, in being discharged from the tub onto the screen,
I propose to fit upon the "tippler "a sloping shelf or spout down which the coal will
run when the tub is upset instead of falling in a mass.
"
In connection with revolving "tipplers I employ an improved system of
frictional gear by which the usual counter shaft is dispensed with, by driving
from the driven sheave direct to the sheaves which revolve the "tippler" on its
circular path, by the intervention of friction sheaves which move into and
out of gear with the other two by a lever handle, and this action may also be
automatically effected by the "tippler" itself as it reaches in its revolution the
proper position.
DESCRIPTION OR DRAWINGS

page_text: is specially adapted though, with slight modifications of the mechanism, the invention
may be applied equally to end "tipplers" making a complete revolution (such as
Cook and Younger's Patent No. 4584 of 1892) as before mentioned.
Fig. 1 (Sheet 1) is a sectional side elevation through the line X-X on Fig. 2
the tub having moved with the "tippler" through about 45 degrees from the
vertical. Fig. 2 is an end elevation, without the tub being shewn in the "tippler"
frame. Fig. 3 (Sheet 2) is a sectional side elevation in which the tub has moved
through one half of a revolution and is completely discharged, the "shutter"
having now been partially raised to the position shewn.
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The same letters indicate similar parts on all the figs.
The "
tippler" frame consists of a pair of circular rims A braced together by
transverse and diagonal braces B B₁ and by girders B2 which carry the rails C on
which the tub wheels run, guarded by angle bars C¹. The transverse and diagonal
braces B B¹ with the girders B2 and the rails C and guard angle bars C¹ form a
cage in which the tub is enclosed and kept in position whilst revolving with the
tippler" frame. The two circular rins A revolve upon and by the operation of
two pairs of sheaves -D mounted on brackets D¹ on the timber frames E. The
driving shaft F, which runs constantly in one direction without need for a counter
shaft, has keyed on it a pair of sheaves F¹ with which a pair of idle sheaves G,
mounted on a shaft G¹ connected with the hand lever G2 are engaged also engaging
with the sheaves D when the "tippler" is to be revolved as shewn on Fig. 1. The
arrows indicate the directions in which the driving sheaves F¹ the idle sheaves G,
and the carrying sheaves D revolve when operating the "tippler" frame.
When the full tub has entered into the "tippler" and is standing upright the
shutter H, on the levers H¹ mounted upon fulcrums H² fixed to the sides of the
upper fixed screen J, is raised as shewn by dotted lines om Fig. 1, and is kept so by
the cam shaped straps K (carried by outriggers K¹ on. the tippler" frame)
pressing down the tail ends of the levers H¹ in which are small friction rollers H³.
The man in charge now by lifting the outer end of the hand lever G2 disengages
the tappet G3 from a hole G4 in the periphery of one of the circular rims A and by
so doing forces the idle sheaves G into contact with the sheaves D which carry the
tippler which now revolves in the direction of the arrow, as shown on Fig. 1,
and the tappet G³ now running upon the periphery of the circular rim A the
revolution of the "tippler" continues automatically until the empty tub is again
upright when the tappet G3 falls into the hole G and the lever G2 throws the idle
sheaves G out of driving contract with the sheaves D and the "tippler" remains
stationary until the empty tub is run out and is replaced by a full tub.
60
When the revolution of the "tippler" commences the cam shaped straps K,
revolving with it, release gradually the tail ends of the levers H¹ and the shutter H
falls into the position shewn in full lines on Figs. 1 and 2 (Sheet 1). The "tippler"
continuing to revolve the tub begins to discharge and to prevent the coal falling in
a mass a spout L is preferably attached to the "tippler" to cause it to fall
gradually onto the upper fixed screen J. The "tippler "having completed half a
revolution is now in the position shewn on Fig. 3 (Sheet 2) having completely
discharged itself meanwhile the action of the cams K has gradually raised the
shutter by stages until it is in the position shewn and it is gradually further raised
as the "tippler" continues to revolve, as indicated by the dotted centre lines, until
the empty tub is again upright and ready for leaving the "tippler" when the cam
shaped straps have opened the shutter to its full extent it falling into the position
shewn on Figs. 1 and 2 (Sheet 1) in full lines when the next revolution commences
and the contents of the next full tub are treated in the same manner.
Thus the process of screening may be briefly described as follows:-
When the tub commences to discharge, the coal in the first instance has its fall
broken by the inclined spout 1 and reaches the fixed screen J without breakage
and the shutter H is yet closed so as to retain the coal and prevent large and small
sweeping down together onto the "jigging' or shaking screen M. The tub
revolving in the "tippler" now continues to discharge more of its contents until it
32

page_text: is completely empty meanwhile the shutter has been gradually raised by the cam
shaped strips allowing, 1st the coal larger than will pass through the bars of the
fixed screen J to pass onto the "jigging" screen M and, continuing to be raised,
will, 2nd allow the still larger coal to pass under it and so on by grades till
finally, being opened to its full extent, the largest coal will pass under onto the
"jigging" screen or screens where the usual séparation into grades of sizes
takes place, apart from the small coal which has practically been separated on
the upper fixed screen, and thus the larger grades of coal are delivered free from
small.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the saine is to be performed I declare that I do not claim
broadly or apart from the construction and arrangement illustrated by my drawings
and herein above described with reference thereto the operating of a shutter from a
kick up through the media of a cam or cams and a lever or levers. Furthermore, I
am aware of Archer's patent No. 16924 of 1891 and do not claim anything described
or claimed in his specification, but what I claim is :-
1st. The improvements in screening coals or other minerals, consisting in fitting
to the upper or fixed screen an automatic appliance, which I call a "shutter,"
actuated through the cam shaped straps K in the manner described by the revolution
of the " tippler," which being closed will temporarily arrest the coal or other
minerals as the tub discharges, except such small pieces as can pass through the bars
of the upper screen, and then gradually opening will first allow the pieces of a certain
size to pass under onto the shaking screen then those of larger sizes until, when fully
opened the largest pieces can also pass, preferably combined with a sloping shelf or
spout upon the "tippler," flame with the objects hereinbefore set forth constructed
and operating substantially as described and illustrated by the accompanying drawings,
as applied to a revolving "tippler" discharging from the side of the tub, or in a
modified form to discharge from the end of the tub.
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2nd. The method of mounting revolving "tipplers" upon friction sheaves rotated
direct from a driven shaft, with frictional driving sheaves always running in one
direction by the intervention of idle sheaves which being put into frictional driving
contact will automatically revolve the tippler" and at the proper position will
automatically bring it to rest with the objects hereinbefore set forth, constructed,
and operating substantially, as described and illustrated by the accompanying
drawings.
Dated this 96th day of Santambou 100e