Improved Apparatus for Use in Riddling, Screening, or Sorting Coal and other Minerals.
Year: 1898

page_text: Date of Application, 29th Oct., 1898
Complete Specification Left, 31st July, 1899-Accepted, 23rd Sept., 1899
PROVISIONAL SPECIFICATION.
Improved Apparatus for Use in Riddling, Screening, or Sorting
Coal and other Minerals.
I, EDWARD BROWNFIELD WAIN, Norton-in-the-Moors, Stoke-on-Trent, Stafford-
shire, Civil and Mining Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to improved apparatus or screens for use in
riddling, sifting or sorting coal and other minerals, the objects of my said inven-
tion being to simplify the construction of such screens, reduce friction whilst in
use, facilitate repairs, to reduce vibration of their supporting frame, and to screen
coal with minimum of breakage.
In carrying this invention into practice I make a square or rectangular framing
of suitable size preferably of or from iron or steel having a channel-shaped, a
girder shaped or other suitable cross-section, or such framing may be made of
any suitable wood.
At a suitable distance from one end of such framing to the top surface of each
of its sides and opposite to each other I bolt or otherwise rigidly fix a suitable
metallic bearing for supporting the ends of a wrought-iron or steel shaft of suit-
able size, on such shaft at a suitable distance from each of its ends I mount a
suitable metallic excentric having similar rods of suitable size and length, such
excentric rods being pivottally connected to a pin or projection at or near to
the lower ends of suitable metallic cranks, arms or levers keyed or fastened on
or near to the ends of a wrought-iron, steel or like suitable shaft supported in
suitable bearings attached or fixed to the top surface or sides of the said framing
at a suitable distance from such excentric shaft bearings, in such cranks, arms or
levers at a suitable distance from the said lower pins or projections I loosely fit
one end of a metallic shaft of suitable size parallel to the said crank or lever-
shaft and so that is passes through suitable bearings attached or fixed to the
under surface of each side of the metallic frame of a suitable inclined screen with-
in such framing, each side of the lower end of the frame of such screen between
such framing being supported on a metallic or wood roller fixed on or to a
metallic shaft supported at each of its ends by a suitable bearing fixed to the
sides of the said framing, and near to the upper ends of such arms or levers I
support the ends of a suitable metallic shaft passing through suitable bearings
attached or fixed to the under surface of each side of the metallic frame of a
suitable inclined screen at a suitable distance above the said lower screen, each
side of the lower end of the framing of such upper screen being supported on a
metallic or wood roller fixed on or to a metallic shaft supported at each of its
ends by a suitable bearing fixed to the top side of the framing of such apparatus,
the higher end only of each sieve or screen being pivotted to the crank-pins or.
cranks enables such screens to be raised on such pivots for facilitating repairs
thereto.
Each sieve or screen I make with or of two or more lengths or perforated

page_text: metallic plates, crossed-bars or lattice-work, each plate or length having a different
sized mesh and fixed or pivotally connected at their higher end to their framing so
that their lower ends are capable of being lowered or raised so as to alter and
adjust the inclination of such plates.
When the excentric or driving shaft is rotated or set in motion, coal is de-
livered on to the top end of the upper screen of such appliances preferably by a
side tippler or conveying-belt to ensure a constant feed, the jolting motion trans-
mitted to such screens by the excentrics and cranks or levers causing such coal
to travel down such upper inclined screen, all coal that may pass through its
meshes falling on to the inclined screen below and the residue from the lower
end of such upper screen on to a picking-band or on to a shute. If the lower
screen has three perforated or latticed plates of different sized mesh then the coal
or mineral passing through same will form into heaps of three different sizes, or
fall into three different receptacles placed in position to receive same, or such
coal may fall from such lower screen on to an inclined metallic "nut screen
below same, or the larger coal or mineral may fall from the lower end of such
lower screen on to a nut-screen having one or more suitable metallic eye-
bearings attached to its underside near to its upper end, through which bearings
a steel or like suitable metallic shaft passes so as to pivotally connect such screen
to such shaft, the ends of such shaft being supported in suitable bearings, the lower
end of such nut screen resting upon one or more suitable metallic or wood
star-wheels, longitudinally grooved, fluted or toothed wheels or rollers fixed or
mounted on a suitable metallic rod or shaft supported at its ends in suitable
bearings so as to retain such nut screen at a suitable inclination.
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As such star-wheel, fluted-roller or toothed-wheels and its or their shaft are
rotated by any suitable means an agitating or shaking motion will be imparted to
such nut screen or sieve causing coal or mineral to pass through its meshes
and form a heap beneath same, or fall into any suitable receptacle, the residue
falling from the lower end of such screen and forming a heap or into any suitable
receptacle.
JOHN NEWTON,
Longport, Stoke-on-Trent, Staffs.,
Agent for Applicant.
Improved Apparatus for Use in Riddling, Screening, or Sorting
Coal and other Minerals.
I, EDWARD BROWNFIELD WAIN, Norton-in-the-Moors, Stoke-on-Trent, Stafford-
shire, Civil and 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 my invention has reference to improved apparatus or arrangement of screens
for use in riddling, sifting or sorting coal and other minerals or materials, the
object of my said invention being to simplify the construction of such apparatus
or screens, to facilitate repairs, to reduce vibration of their supporting frame, to
reduce friction whilst in use, and with a low expenditure of power to screen coal,
minerals or materials with a minimum of breakage.
In carrying this invention into practice I construct and erect a square or rect-
angular framing of suitable size to ensure the true working in parallel of the
various parts of such apparatus or screens of or from any suitable wood, or from

page_text: roller iron or steel having a channel shaped, a girder shaped or other suitable
transverse section.
At a suitable distance from one end of such framing to the top surface of each of
its sides and opposite to each other I bolt or otherwise rigidly fix a suitable
metallic bearing for supporting a wrought-iron or steel shaft of suitable size
which may be cranked horizontally and transversely to such framing, a suitable
metallic crank may be keyed or fixed on or to each end of such shaft, or a suitable
metallic excentric may be keyed or fixed on such shaft at a suitable distance from
each of its ends having metallic rods of suitable size and length, such excentric
or connecting rods being pivotally connected to a metallic pin or projection at or
near to the lower ends of suitably shaped metallic cranks or levers keyed or
fastened on or near to the ends of a wrought-iron or steel or like suitable shaft
supported in suitable bearings bolted or otherwise fixed to the top sides or surface
of the said framing at a suitable distance from such excentric or crank-shaft
bearings, or so as to work loose on such shaft between suitable metallic collars
fixed thereon, or on pins, journals, projections or hangers attached to the said
framing which act as a fulcrum, in such cranks or levers at a suitable distance
from the said lower pins or projections I loosely fit one end of a wrought-iron or
other suitable metallic shaft of suitable size parallel to the said crank or lever
shaft so that it passes through or bears upon suitable bearings attached or fixed
to the under surface of each side of the framing of a suitable inclined metallic or
other screen within such framing, each side of the lower end of the frame of
such screen between such framing being supported by or bearing upon metallic
or wood rollers of suitable size keyed or fixed on a suitable metallic shaft sup-
ported at its ends by a suitable bearing fixed to the sides of the said framing, and
near to the upper ends of such levers I support the ends of a similar screen in
like manner with or by means of similar rollers beneath its lower end, the higher
end only of each sieve or screen being pivotted to the crank-pins or roller bars
enables such screens to be raised on such pivots for facilitating repairs thereto.
In order that my said invention may be more readily understood and explained
in detail I have hereunto annexed a sheet of drawings on which letters of reference

page_text: such screw-framing resting or bearing upon metallic or wood revolvable rollers p.
mounted on a metallic shaft q supported by bearings fixed to the framing b.
The screens or sieves i, o I make of any suitable length and width of or from
two or more lengths of perforated metallic plates, crossed or parallel metallic
bars or rods, or lattice work metallic plates, bars or rods and pivottally connect
each plate or length at its higher end to their framing so that their lower ends
are capable of being raised to enable their inclination to be altered or adjusted.
When the excentric or driving shaft a is rotated or set in motion coal is
delivered on to the higher end of the upper screen o of such appliances preferably
by a side tippler or conveying belt to ensure a constant feed, the reciprocating
motion transmitted to such inclined screen by the excentrics c, cranks or levers
causing coal thereon to slide or travel down upon the plates of such upper screen,
all coal which may pass through its meshes falling on to the inclined screen i
below where it is further separated by the reciprocating motion of such lower
screen into two or more sizes according to the perforated or lattice work screen-
plates used, the residue or larger coal falling from the lower end of the upper
Ecreen on to a picking-band, a schute," or into a suitable receptacle.
The upper and lower screens being of similar construction and moving alter-
nately in opposite directions are balanced to a great extent, so that the power
required to drive such screen or apparatus is considerably reduced; but when
it is required to produce two sizes only of coal or other mineral or material either
of the two sieves may be dispensed with, and by adjusting the angle of the rock-
ing-shaft levers and the position of the rollers a wave like or intermittent forward
motion is obtained which effectually separates the smaller from the larger par-
ticles by allowing the small particles to fall through the mesh of the screen used.
When I construct a lighter or single screen one inclined screen only and its
framing is used carried or bearing on rollers at its lower end and supported at
its upper end on or by levers or hangers s pivottally attached to opposite sides of
the sieve or screen framing as in the case of a double screen, the levers being
pivottally supported at or to some part of such framing, the motion in this case
may be imparted to such screen by a single excentric t or crank on a suitable
iron or steel shaft u supported by suitable bearings, and pivottally connected
with the screen or sieve at a position in or near the centre and in line with the
levers or hangers at its upper end.
When it is required to produce three or more sizes the mesh of the screens is
arranged with the smaller apertures at the higher end of such inclined screen;
but in the case of the double-screen first described the larger apertures are upper-
most of the two screens and the smaller mesh in the lower screen.
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If the lower screen has perforated or lattice plates of different sized mesh then
the coal or mineral passing through same will form into heaps of different sizes,
or fall into different receptacles placed in position to receive same, or on to pick-
ing or conveying belts, or such small coal may fall on to an inclined metallic
"nut-screen having one or more metallic bearings w attached to its under
surface near to its upper end, through which bearing or bearings a steel or like
suitable metallic shaft passes so as to pivotally connect such screen to such
shaft, and the ends of such shaft supported by suitable bearings, the lower end of
such nut screen resting or bearing on one or more metallic or wood star-
wheels y, longitudinally grooved wheels, longitudinally fluted wheels or toothed
wheels or rollers fixed or mounted on a suitable metallic rod or shaft supported
at its end by suitable bearings so as to retain such
nut screen at a suitable
inclination, by lowering or raising such shaft with its grooved, fluted or star
wheel or wheels in its bearings it will be readily understood that the inclination of
such screen can be altered as desired.
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As such star-wheel, fluted-roller or toothed-wheel y and its or their shaft z
are rotated by any suitable means an agitating or shaking motion will be imparted
to such nut screen or sieve v causing the smaller particles of coal or other
mineral or material to pass through its meshes and form a heap beneath such
"
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page_text: screen, or fall into any suitable receptacle placed in position to receive same, the
residue or larger particles falling from the lower end of such screen to form a
heap or into any suitable receptacle, the fluted roller serving to steady the fall
of the "nuts" from such screen and minimising their breakage.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is:―
1st. The construction and arrangement of a double screen, or two screens at
any suitable inclination one above the other at a suitable distance apart pivottally
connected at their upper or higher end to a lever at each of their sides, and sup-.
ported at their lower ends upon or by means of a transverse roller or rollers
mounted on a shaft beneath such lower ends so that such screens may be readily
raised at their lower ends, each screen having two or more perforated or lattice
work plates or parallel bars or rods of the same or different mesh or any suitable
distance apart pivottally connected at their upper ends to their side framing or
framework so that their lower or free ends may be raised to adjust their inclination
or to facilitate repairs, and so that the lower end of the higher plates shall over-
lap the higher end of the following or lower plates, such screens being driven by
a reciprocating motion by means of an excentric or excentrics, a crank or cranks
mounted on a suitable shaft, or by means of a cranked shaft supported by suitable
bearings at a suitable distance from their highest end for the purpose of screen-
ing, sorting or riddling coal, minerals or other material as herein substantially
described and set forth.
2. The construction and arrangement of a single screen suspended at any suit-
able angle by a suitable lever or levers so that its lower end rests or bears upon a
suitable transverse roller or rollers mounted on a horizontal shaft, the perforated
plate or plates of which screen being the same or of a different mesh are pivottally
connected at its or their upper end to its or their side framing so as to enable
same to be raised at its or their lower end to adjust its or their inclination or to
facilitate repairs, such screen being driven by reciprocating motion imparted
thereto by an excentric, excentrics, by a crank or cranks, or by a cranked shaft
mounted in suitable bearings at a suitable distance from its higher end for the
purpose of screening, sorting or riddling coal, minerals or other material as herein
substantially described and set forth.
3. The construction use and combination with a single or double screen here-
inbefore described and claimed, of a screen of suitable size and mesh (herein before
described as a "nut screen") having a suitable bearing or bearings fixed or
attached to its higher end or to its underside pivottally mounted on a suitable rod
or shaft supported by suitable bearings, and its lower end resting or bearing
upon a suitable star-wheel, or a longitudinally fluted or longitudinally grooved
roller or rollers keyed or fixed on a suitable rotatable transverse horizontal shaft
supported by suitable bearings, which shaft when rotated with its star-wheel,
fluted or grooved roller or rollers imparts an agitating or shaking motion to such
screen as herein substantially described and set forth.
Dated this 29th day of July
1899.
JOHN NEWTON,
Longport, Stoke-on-Trent, Staffs.,
Agent for Applicant.
JOHN NEWTON,
Longport, Stoke-on-Trent, Staffs.,
Agent for Applicant.