Improvements in Grinding, Crushing, Pulverizing, Disintegrating, and the like Machines.
Year: 1898

page_text: Date of Application, 9th Mar., 1898
Complete Specification Left, 9th Jan., 1899 -Accepted, 11th Feb., 1899
PROVISIONAL SPECIFICATION.
Improvements in Grinding, Crushing, Pulverizing, Disintegrating,
and the like Machines.
We, PHILIP UNWIN ASKIAM, of The Yorkshire Steel and Engineering Works,
WILLIAM WILSON, of 43, Witney Street, and WILLIAM GEORGE SLACK, of 6,
Sheldon Road, all of Sheffield, in the County of York, Engineers, do hereby
declare the nature of our said invention to be as follows:-
Our invention relates to machines for grinding, crushing, pulverizing or dis-
integrating substances in which rollers are driven in the interior of a ring or
cylinder into which the material to be reduced is fed and the object of our pre-
sent invention is to render such machines more durable by making the parts
which are subject to the greatest wear readily reversible and renewable when
worn and also to reduce the number of pieces of which such working parts are
made up.
As at present constructed, the crushing rollers in such machines are carried
by double ended driving arms attached to a driving shaft which is also provided
with stirrers by means of which the material fed into the machine is distributed
to the action of the crushing rolls and also propellers for expelling the ground
material from the machine. These driving arms, stirrers, and propellers are
each secured separately to the driving shaft and are each provided with renew-
able wearing pieces thus constituting a number of working parts made up of
a number of separate pieces.
According to our present invention we construct the driving arms in the form
of two separate discs provided with open ended slots so that when the two discs
are secured to the driving shaft a proper distance apart, two crushing rollers are
placed opposite to each other on either side the driving shaft with their spindles
or gudgeons carried in these slots which form their bearings; as in the course of
time the sides of the slots become worn, instead of providing separate renewable
wearing pieces for each side of each slot we construct them so that one removable
fillet is carried right across the disc on each side of the slots and fitted into suit-
ably formed recesses which are alike on both sides and at both ends so that when
they become worn on the side next the roller spindle or gudgeon these fillets can
be each turned over or reversed or changed from one side of the slot to the other so
as to present fresh wearing surfaces and in this way we lessen the number of
separate pieces and in a proportionate manner the number of bolts or their equiva-
lents. By leaving the ends of these reversible fillets long enough to project
beyond the periphery of the disc, the projecting ends form guards to protect the
corner of the slots and edges of the discs which would otherwise become worn.
When the fillets are thus placed in the recesses in the discs and the stirrer is in
place they cannot fall out even if the bolts were to give way as the boss of the
stirrer arms would keep them in place.
A further improvement we effect by dispensing entirely with the propeller arms
and boss and securing the blades of the propeller to suitably formed lugs in the

page_text: disc or drivers such lugs being solid and part of the body of the disc or driver,
and by forming the lugs at the right angle, the blades can be made compara-
tively flat and straight and easy to secure by bolts, keys, or other equivalents in
position and also easily removable and replaced as required. In this way we dis-
pense with a further number of separate and removable pieces and thereby reduce
the wear and tear and lessen the liability to accident. By placing the propellers
on the discs or drivers it renders it possible to shorten the machine and still
further reduce the liability of the edges of the discs or the ends of the drivers
becoming worn as they travel through the material to be operated upon.
A still further improvement we effect by dispensing with the blocks and adjust-
ment screws by which the roller path or ring is secured to the body of the
machine and cradles and substituting therefor a metallic band or bands which
we pass round the outside of the said path or ring from the cradle or bed plate
on one side of the machine to the cradle or bed plate on the other side of the
machine. The ends of the band or bands we secure by bolts, screws, or other
equivalents and by these means the band or bands may be adjusted to the required
degree of tightness; in this way we are able to employ a path or ring of lighter
section and to dispense with the moveable blocks and adjustment screws and also
the flanges on the body castings which were required to secure the block which
carried the adjustment screws previously referred to.
Dated this 8th day of March 1898.
R. HEBER RADFORD,
Agent for the Applicants.
Improvements in Grinding, Crushing, Pulverizing, Disintegrating,
and the like Machines.
We, PHILIP UNWIN ASKHAM, of The Yorkshire Steel and Engineering Works,
WILLIAM WILSON, late of 43, Witney Street, but now of 20, Rupert Road, and
WILLIAM GEORGE SLACK, of 8, Sheldon Road, all of Sheffield, in the County of
York, Engineers, do hereby declare the nature of our said invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement;
-
Our invention relates to machines for grinding, crushing, pulverizing
or dis-
integrating substances in which rollers are driven in the interior of a ring or
cylinder into which the material to be reduced is fed and the object of our pre-
sent invention is to render such machines more durable by making the parts
which are subject to the greatest wear readily reversible and renewable when
worn and also to reduce the number of pieces of which such working parts are
made up.
As at present constructed, the crushing rollers in such machines are carried
by double ended driving arms attached to a driving shaft which is also provided
with stirrers by means of which the material fed into the machine is distributed
to the action of the crushing rolls and also propellers for expelling the ground
material from the machine. These driving arms, stirrers, and propellers are
each secured separately to the driving shaft, and are each provided with renew-
able wearing pieces, thus constituting a number of working parts made up of
a number of separate pieces.
Our invention will be better understood on reference to the accompanying two
sheets of drawings, in which,

page_text: Fig. 1 is a perspective view of one of our improved driving arms in the form
of a disc with its appurtenant fittings taken from what may be called an outside
view.
1
.
Fig. 2 is a similar illustration from what may be called an inside view.
Fig. 3 is a front elevation of two such discs mounted on the mill shaft, shewing
the crushing rolls in position.
Fig. 4 is an elevation, and
Fig. 5 a plan of one of our improved discs shewing a modification in the form
and mode of securing the fillets.
Fig. 6 is a similar view shewing a further modification in the form and mode
of securing the fillets.
Fig. 7 is an end elevation of the roller path or ring, shewing our improved
method of securing the same to the body of the machine and cradles.
Fig. 8 is a side elevation of the same, and,
Fig. 9 is a section taken through the line A, B, Fig. 7.
The same letters refer to similar parts throughout the several views.
According to our present invention we construct the driving arms in the form of
two separate discs, A, A, provided with open ended slots, B, so that when the two
discs are secured to the driving shaft, C, Fig. 3, a proper distance apart, two crush-
ing rollers, D, D, are placed opposite to each other on either side the driving shaft
with their spindles or gudgeons carried in these slots which form their bearings;
as in the course of time the sides of the slots become worn, instead of providing
separate renewable wearing pieces for each side of each slot we construct them
so that one removable fillet, E, E, is carried right across the disc on each side of
the slots, B, B, (Figs. 1, 2 & 3,), and fitted into suitably formed recesses which
are alike on both sides and at both ends, so that when they become worn on the
side next the roller spindle or gudgeon these fillets can each be turned over or
reversed in their respective recesses bringing fresh surfaces to the wearing side, they
can be then turned end for end (without turning over or reversing) in their
respective recesses bringing another set of wearing surfaces into position and
finally they can be again turned over or reversed in their respective recesses
bringing a fourth set of wearing surfaces into position, or they can be transferred
from one side of the disc to the other without being turned or reversed, they can
then be turned over or reversed in the same position and finally turned end for
end without reversing, and in this way we lessen the number of separate pieces
and in a proportionate manner the number of bolts or their equivalents.
leaving the ends of these reversible fillets long enough to project beyond the peri-
phery of the disc, the projecting ends form guards to protect the corner of the
slots and edges of the discs which would otherwise become worn.
By
When the fillets are thus placed in the recesses in the discs and the stirrer is
in position on the shaft, they cannot fall out, even if the bolts screws, or
rivets J, J, or the keys or cotters, H, H, were to give way, as the boss of the
stirrer arms would occupy the space between A¹, and A², on the shaft, C, Fig. 3,
and Keep the said fillets in place.
The modified method of securing the fillets, E, E, to the disc, A, is effected as
shewn in Figs. 4 & 5, by employing longitudinal cotters or keys, H, H, and by
the introduction of a guard or keep, I. In this arrangement the fillets, E. E,
can be turned end for end and reversed on the same side of the disc, A, or they
can be reversed and placed on the opposite side of the disc, A.
It will also be seen that when the keys or cotters. H, are drawn and the bolts
screws. or rivets J, J, removed, that the fillets E, E, can be drawn through the
keep, I, from either end of the disc.
In the further modification illustrated on Fig. 6, the fillets, E. E, are made
like taner keys driven into the recesses in the disc, A, from either end and
secured by bolts, screws, or pins, J, J.
A further improvement we effect by dispensing entirely with the propeller arms

page_text: and boss, and securing the blades of the propeller, F, to suitably formed lugs, G,
on the discs or drivers, A, such lugs being either detachable or solid so as to
form part of the body of the disc or driver, and by forming the lugs, G, at the
required angle, the blades, F, can be made comparatively flat and straight and
.easy to secure by bolts, keys, or other equivalents, in position, and also easily
removable and replaceable as required. In this way we dispense with a further
number of separate and removable pieces and thereby reduce the wear and tear
and lessen the liability to accident. By placing the propellers; F, on the discs or
drivers it renders it possible to shorten the machine and still further reduce the
liability of the edges of the discs or the ends of the drivers becoming worn as they
travel through the material to be operated upon.
A still further improvement we effect by dispensing with the blocks and adjust-
ment screws by which the roller path or ring, P, is secured to the body of the
machine or cradle, Q, and substituting therefor a metallic hinged band or
bands, R, R, which we pass round the outside of the said path or ring from the
cradle or bed plate on one side of the machine to the cradle or bed plate on the
other side of the machine. The ends of the hinged band or bands we secure by
bolts, screws, S, S, or other equivalents, and by these means the band or
bands, R, R, may be adjusted to the required degree of tightness; in this way we
are able to employ a path or ring, P, of lighter section and to dispense with the
moveable blocks and adjustment screws and also the flanges on the body castings
which were required to secure the block which carried the adjustment screws pre-
viously referred to.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, we declare that what
we claim is: —
1. In grinding, crushing, pulverizing, disintegrating, and the like machines, the
arrangement and combination of parts and appliances comprising the reversible
fillets, E, E, extending right across the driving arms or discs, A, A, suitably
formed, fitted and secured in recesses in the said discs, in the manner and for
the purposes substantially as herein described and illustrated in Figs. 1, 2 & 3.
2. A modified form and arrangement of securing the fillets, E, E, in the
discs, A, A, by means of the keys or cotters, H, H, in combination with the keep
or guard, I, in the manner and for the purposes substantially as herein described
and illustrated in Figs. 4 and 5.
3. The further modification in the form and method of securing the fillets, E, E,
on the disc, A, A, in the manner and for the purposes substantially as herein
described and illustrated in Fig. 6.
4. The method of securing the blades of the propeller, F, to suitably formed
lugs, G, on the discs or drivers, A, such lugs being either detachable or solid so
as to form part of the body of the discs or drivers in the manner and for the
purposes substantially as herein described and illustrated in Figs. 1, 2 and 3.
5. The arrangement and combination of parts and appliances comprising the
hinged band or bands, R, R, with the bolts or screws, S, S, by means of which
the roller path or ring, P, is secured and adjusted to the body of the machine or
cradles, Q, in the manner and for the purposes substantially as herein described
and illustrated in Figs. 7, 8, and 9.
Dated this 7th day of January 1899.
R. HEBER RADFORD,
Agent for the Applicants.