IMPROVEMENTS IN ROCK AND ORE CRUSHERS AND PULVERIZERS
Year: 1881

page_text: LETTERS PATENT to John Thomson King, of Liverpool, in the County of
Lancaster, Patent Agent for an Invention of "IMPROVEMENTS IN ROCK AND
ORE CRUSHERS AND PULVERIZERS." A communication from abroad by
Charles Forster, of Pittsburgh, Pennsylvania.
PROVISIONAL SPECIFICATION left by the said John Thomson King at the
Office of the Commissioners of Patents on the 26th January 1881.
JOHN THOMSON KING, of Liverpool, in the County of Lancaster, Patent Agent.
"IMPROVEMENTS IN ROCK AND ORE CRUSHERS AND PULVERIZERS." [A com-
munication from abroad by Charles Forster, of Pittsburgh, Pennsylvania.]
The said Invention has particular reference to certain improvements in machines
for crushing rock, ore, and other material, in which one jaw or working face has a
lateral vibration or crushing and grinding motion across the face of the other jaw
or die, and its special objects are, 1st, to improve the construction of the dies for
crushing purposes, and, 2nd, to adapt the machines to not only crush, the material
but to pulverize it after it has been crushed, both operations being performed by
the same jaws or dies as the material is fed through the machine.
The Invention consists, 1st, in forming on the corrugations of the dies a series of
angles extending longitudinally across the faces of the dies, whereby a number of
projections are formed on the moveable die, and a number of angular depressions
on the fixed die, which give the dies a much firmer bite on the material, and
enable them to coush it more easily; 2nd, in forming at the lower part of the dies
a series of longitudinal lips, the lips of one die extending out opposite the plain
portions of the other, by which the material is caught as it descends and given a
final and more efficient crush; 3rd, in arranging the machine for both crushing
and pulverizing by providing it with dies in which the upper part is corrugated
for crushing the material, and in which the fixed die is concave, and the movable
die correspondingly convex at the base for pulverizing the material previously
crushed in the upper part of the dies; 4th, in providing the convex base of the
moveable die with a series of pockets, and serrations or angular crushing and
grinding edges to facilitate the pulverizing of the material, and its delivery from
[Price 8d1

page_text: the dies; and, 5th, in certain improvements in the construction and arrangement
of the machine.
The fixed die is mounted in a frame cast at one end of the bed of the machine,
the die being provided with a pivot bearing on its back which fits into a recess in
the frame, and the base of the die being slightly inclined at the back, and resting
against a taper or wedge bar, by means of which the die may be thrown out or
drawn in to diminish or enlarge the opening between the dies, according to the
size to which the material is to be crushed. After the die has been adjusted it is
firmly locked by two wedges driven between wings on the die and the frame of
the bed. The moveable jaw carrying the moveable die is provided with a pivot
extending down into a seat in the bed, and a hollow semi-circular bearing on the
bed extends up around the pivot and within the jaw to enable the jaw to sustain the
heavy strain upon it in crushing. The jaw is provided with a long arm extending
back over the bed, and resting at its end on a plate on the bed, and a reciprocating
motion is imparted to the arm by suitable power connections, which cause the face
of the moveable die to move or vibrate laterally across the face of the fixed die.
The moveable die is secured in place in the jaw by an upwardly tapering dovetail
connection, being slipped in from below and held in place by a couple of pins
passing over the top of the jaw into recesses or holes in the back of the die.
Where the machine is used for crushing only, the face of the fixed die is arranged
on an incline, and that of the moveable die is about perpendicular, so that there is
a large space between the dies at the top for the reception of the material, which
space gradually diminishes toward the base of the dies, where the crushed material
is discharged. The face of the fixed die is provided with two corrugations, formed
of two hollow parts and a central rib between them, and the face of the moveable
die is provided with two corresponding corrugations formed of two cheeks and a
recess between them opposite the rib. Extending longitudinally across the corru-
gations are a series of angles, there being generally about three angles on each
corrugation, and these angles on the cheeks form projections, and on the hollow
parts form angular depressions, by means of which the dies obtain a firm bite or
hold on the material to crush it. Extending from about the centre of the dies to
their bases are a series of longitudinal lips, which gradually increase in height
toward the base, at which point they extend furthest from the die. The spaces
between are slightly broader than the faces of the lips, and the lips on each die are
opposite the spaces on the other die, the lips on the moveable die breaking joint
with and playing into the spaces on the fixed die when they are set close.
The operation of these dies is as follows:-The lateral vibration of the movable
die across the fixed die causes the cheeks on the movable die to alternately
approach and recede from the hollow parts on the fixed die, the cheek on one side
approaching when that on the other side recedes, so that the operation of crushing
is continuous. The ore or other material is fed at the top of the machine, and is
caught in the angular faces of the dies and crushed between them, the angles on
the faces giving the dies a much stronger bite or hold than where the ordinary
curved dies are used, and enabling them to crush or grind it more easily. As the
material falls between the dies it is caught by the lips and given a final break, the
broken material being tilted or thrown over by the lips, so that no long pieces can
pass without being crushed small enough to pass through the spaces between the
lips, the lips thus serving to crush the material to a more uniform size than the
ordinary dies.
Where the dies are constructed to both crush and pulverize the material they
are mounted in the machine as above described, the fixed die being inclined, and
the moveable die about perpendicular. The upper parts of the dies are formed
with the angular corrugations as above described. Towards the base of the fixed
die the central rib gradually fades away, and thus forms a concave part at the
base, this concave being slightly larger than an are of a circle described from the
pivot of the movable jaw. The base of the movable die extends out so as to form
a convex portion fitting into the concave of the fixed die, the curve of the convex

page_text: being an arc slightly smaller than that of the concave. Across the face of the
convex are a series of tapered pockets, into which the crushed ore falls from the
upper part of the dies, and between and below these pockets are a series of angular
crushing and grinding edges, between which edges the die is cut away to form
clearances, into which the pulverized material falls, being thrown out by the lateral
movement of the die. By forming angles or serrations at the base of the die and
the crushing edges along these serrations the delivering surface of the dies is
increased, so as to enable them to pulverize and deliver more than double the
amount where a straight base is used. To prevent the passage of any unpulverized
material on either side of the movable. die, or the passage of any pulverized
material into the bearings of the jaw to clog it, a false plate is placed within the
bed frame on either side of the movable die, the plate being adjusted by means of
screws against the die face, so as to close the opening on either side of the die.
When the improved crushing and pulverizing dies are employed the operation of
the machine is as follows:-The lateral vibration imparted to the movable die on
the moveable jaw causes the corrugations of this die to alternately approach and
recede from those of the fixed, as described in connection with the other dies.
At the same time the convex base of the movable die vibrates laterally with a
crushing and grinding motion within the concave of the fixed die. The material
to be crushed and pulverized is fed in at the top, and is crushed by the corrugations
as described in connection with the other dies, the material being gradually crushed
still smaller as it sinks between the dies until small enough to fall into the tapered
pockets above the crushing edges on the convex face. As the material is fed from
these pockets it is caught between the face of the fixed die and the grinding edges
of the moveable die, which by a part crushing, part grinding motion, thoroughly
pulverize it, and by the lateral motion of the die throw it out into the clearances
between the edges, from which it drops into the discharge.
The dies are generally formed of cast iron, being cast on a chill or in sand as
desired; but for pulverizing talc, pottery clay, or other materials that would be
injured by any particles of iron ground off the face of the dies, the said dies are
made of burr stone or other hard stone, or of glass, baked clay, or other refractory
material, which if ground off by the operation of crushing will have no deleterious
effect on the material pulverized. As the peculiar grinding motion of the dies has
not so great a wear or strain on them as the direct crush usually employed in
crushers, dies made of these substances will be found to wear well, and prove
satisfactory in machines having the operation above set forth.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Thomson King in the Great Seal Patent Office on the
16th July 1881.
JOHN THOMSON KING, of Liverpool, in the County of Lancaster, Patent Agent.
"IMPROVEMENTS IN ROCK AND ORE CRUSHERS AND PULVERIZERS." A com-
munication from abroad by Charles Forster, of Pittsburgh, Pennsylvania.
The said Invention has particular reference to certain improvements in machines
for crushing rock, ore, and other material, in which one jaw or working face has a
lateral vibration or crushing and grinding motion across the face of the other jaw
or die, and its special objects are, first, to improve the construction of the dies for
crushing purposes, and, second, to adapt the machines to not only crush the
material, but to pulverize it after it has been crushed, both operations being
performed by the same jaws or dies as the material is fed through the machine.
The Invention consists, first, in forming on the corrugations of the dies a series
of angles extending longitudinally across the faces of the dies, whereby a number
of projections are formed on the movable die, and a number of angular depressions
on the fixed die, which give the dies a much firmer bite on the material, and
enable them to crush it more easily; second, in forming at the lower part of the
dies a series of longitudinal lips, the lips of one die extending out opposite the plain
portions of the other, by which the material is caught as it descends, and given a
final and more efficient crush; third, in arranging the machine for both crushing
and pulverizing by providing it with dies, in which the upper part is corrugated
for crushing the material, and in which the fixed die is concave and the movable
die correspondingly convex at the base for pulverizing the material previously
crushed in the upper part of the dies; fourth, in providing the convex base of the
movable die with a series of pockets and serrations or angular crushing and grinding
edges to facilitate the pulverizing of the material and its delivery from the dies;
and, fifth, in certain improvements in the construction and arrangement of the
machine.
The fixed die is mounted in a frame cast at one end of the bed of the machine,
the die being provided with a pivot bearing on its back which fits into a recess in
the frame, and the base of the die being slightly inclined at the back, and resting
against a taper or wedge bar, by means of which the die may be thrown out or
drawn in to diminish or enlarge the opening between the dies, according to the size
to which the material is to be crushed. After the die has been adjusted it is
firmly locked by two wedges driven between wings on the die and the frame of the
bed. The movable jaw carrying the movable die is provided with a pivot extending
down into a seat in the bed, and a hollow semi-circular bearing on the bed extends
up around the pivot and within the jaw to enable the jaw to sustain the heavy strain
upon it in crushing. The jaw is provided with a long arm extending back over
the bed, and resting at its end on a plate on the bed, and a reciprocating motion is
imparted to the arm by suitable power connections, which cause the face of the
movable die to move or vibrate laterally, across the face of the fixed die. The
movable die is secured in place in the jaw by an upwardly tapering dovetail
connection, being slipped in from below and held in place by a couple of pins
passing over the top of the jaw into recesses or holes in the back of the die.
Where the machine is used for crushing only, the face of the fixed die is arranged
on an incline, and that of the movable die is about perpendicular, so that there is a
large space between the dies at the top for the reception of the material, which
space gradually diminishes towards the base of the dies, where the crushed material
is discharged. The face of the fixed die is provided with two corrugations formed

page_text: of two hollow parts, and a central rib between them, and the face of the movable
die is provided with two corresponding corrugations formed of two cheeks and a
recess between them opposite the rib. Extending longitudinally across the corru-
gations are a series of angles, there being generally about three angles on each
corrugation, and these angles on the cheeks form projections, and on the hollow
parts form angular depressions, by means of which the dies obtain a firm bite or
hold on the material to crush it. Extending from about the centre of the dies to
their bases are a series of longitudinal lips, which gradually increase in height
towards the base, at which point they extend furthest from the die. The spaces
between are slightly broader than the faces of the lips, and the lips on each die are
opposite the spaces on the other die, the lips on the movable die breaking joint
with and playing into the spaces on the fixed die when they are set close.
The operation of these dies is as follows:-The lateral vibration of the movable
die across the fixed die causes the cheeks on the movable die to alternately
approach and recede from the hollow parts on the fixed die, the cheek on one side
approaching when that on the other side recedes, so that the operation of crushing
is continuous. The ore or other material is fed at the top of the machine, and is
caught in the angular faces of the dies and crushed between them, the angles on
the faces giving the dies a much stronger bite or hold than where the ordinary
curved dies are used, and enabling them to crush or grind it more easily. As the
material falls between the dies it is caught by the lips and given a final break, the
broken material being tilted or thrown over by the lips, so that no long pieces can
pass without being crushed small enough to pass through the spaces between the
lips, the lips thus serving to crush the material to a more uniform size than the
ordinary dies.
Where the dies are constructed to both crush and pulverize the material they are
mounted in the machine as above described, the fixed die being inclined and the
movable die about perpendicular. The upper parts of the dies are formed with
the angular corrugations as above described. Towards the base of the fixed die the
central rib gradually fades away, and thus forms a concave part at the base, this
concave being slightly larger than an arc of a circle described from the pivot of the
movable jaw. The base of the movable die extends out so as to form a convex
portion, fitting into the concave of the fixed die, the curve of the convex being an
arc slightly smaller than that of the concave. Across the face of the convex are a
series of tapered pockets, into which the crushed ore falls from the upper part of
the dies, and between and below these pockets are a series of angular crushing and
grinding edges, between which edges the die is cut away to form clearances, into which
the pulverized material falls, being thrown out by the lateral movement of the die.
By forming angles or serrations at the base of the die and the crushing edges along
these serrations the delivering surface of the dies is increased, so as to enable them
to pulverize and deliver more than double the amount where a straight base is
used: To prevent the passage of any unpulverized material on either side of the
movable die, or the passage of any pulverized material into the bearings of the
jaw to clog it, a false plate is placed within the bed frame on either side of the
movable die, the plate being adjusted by means of screws against the die face, so as
to close the opening on either side of the die.
When the improved crushing and pulverizing dies are employed the operation
of the machine is as follows:-The lateral vibration imparted to the movable die
on the movable jaw causes the corrugations of this die to alternately approach and
recede from those of the fixed, as described in connection with the other dies. At
the same time the convex base of the movable die vibrates laterally with a
crushing and grinding motion within the concave of the fixed die. The material
to be crushed and pulverized is fed in at the top and is crushed by the corrugations,
as described in connection with the other dies, the material being gradually
crushed still smaller as it sinks between the dies until small enough to fall into
the tapered pockets above the crushing edges on the convex face. As the material
is fed from these pockets it is caught between the face of the fixed die and the

page_text: grinding edges of the movable die, which by a part crushing part grinding motion
thoroughly pulverize it, and by the lateral motion of the die throw it out into
the clearances between the edges from which it drops into the discharge.
The dies are generally formed of cast iron, being cast on a chill or in sand, as
desired; but for pulverizing talc, pottery clay, or other materials that would be
injured by any particles of iron ground off the face of the dies, the said dies are
made of burr stone or other hard stone, or of glass, baked clay, or other refractory
material, which if ground off by the operation of crushing will have no deleterious
effect on the material pulverized. As the peculiar grinding motion of the dies has
not so great a wear or strain on them as the direct "crush" usually employed in
crushers, dies made of these substances will be found to wear well and prove
satisfactory in machines having the operation above set forth.
Fig. 1 is a perspective view of the said improved crushing machine, showing a
pair of dies (either for crushing, or for both crushing and pulverizing) mounted
therein.
Fig. 2 is a longitudinal section of the same, the power connections being broken
away and the dies for both crushing and pulverizing being mounted therein.
Fig. is a perspective view of the fixed die used for both crushing and
pulverizing.
Figs. 3 and 5 are like views of the movable die used for crushing and
pulverizing.
Fig. 6 is a like view of the fixed die used for crushing only, and
Fig. 7 is a like view of the movable die used for crushing only, the base of the
fixed die being shown to illustrate its relative position there with.
Like letters of reference indicate like parts in each.
A represents the bed of the machine, in one end of which the fixed die or jaw B
is secured, and C is the movable die mounted in the jaw D, which is pivotted on
the bed A, and is provided with the long arm D¹ connected at its end with the
power mechanism. The bed A has a seat a formed therein for the reception of
the pivot d of the movable jaw, and at the back of the seat is the hollow semi-
circular bearing a', which extends up into the movable jaw chambered out for its
reception and forms a firm brace for the pivot d of the jaw, enabling it to sustain
the heavy strain upon it during the operation of the machine. The pivot a fitting
within the bearing a¹ into the seat a extends down below the discharge opening
of the dies, and thus prevents the jaw from rising on account of the heavy strain
on the lower part of the jaw. A long bolt passes through the pivot d and bed A
to secure the jaw in the machine. The long arm D¹ extends back over the bed
and its end rests and slides on a guide plate p at the end of the bed, and a
reciprocating motion is imparted to this arm by means of a link and cam wheel
or other suitable power connection.
The fixed die B, whether for crushing only or for crushing and pulverizing, is
secured in the frame A¹ at the front of the bed A, and the movable jaw D with
its die C works within this frame which fits around it, and prevents the passage
of sand into the working parts of the machine. The fixed die B is placed in the
frame A¹ from below, and extending horizontally across its back is a pivot
bearing b which rests in a corresponding recess in the bed frame, and the die is.
held against side motion by the wings 61, 61, fitting against the side of the frame.
The base of the die is provided with a slight horizontal taper e at the back, which
rests against a corresponding wedge or tapered bar f passing laterally through the
frame A', and fitting against the back of the frame, so as to give a solid support
to the die. The taper box f serves to adjust the die B to enlarge or reduce the
opening at the base, the die sliding up on the incline of the wedge and swinging
on its pivot bearing as the wedge is forced in. After the opening is properly
adjusted the die is locked in place by wedges 62 driven from above between the

page_text: wings b¹ and the bed frame, and is thus held perfectly firm against any crushing
strain brought upon it.
The die Č is secured in the movable jaw D by means of the upwardly tapering
dove-tail g, wider at the base than at the top, being slipped into a corresponding
dove-tail in the jaw from below, and secured by a couple of pins h passing over the
top of the jaw into suitable holes in the top of the die. Babbit or similar metal
is then run between the die and jaw, filling the space between them and securing
the die firmly in the jaw. As the die fits into the jaw from below the difficulty
heretofore experienced on account of the die being raised by the strain in crushing
is entirely overcome, and any like strain will only hold the die more firmly in the
jaw. At the base of the die C a hollow semicircular lip i projects downwards, so
as to protect the journal of the jaw D and prevent any pulverized ore from working
into it.
When the machine is used for crushing only, as shown in Figs. 6 and 7, the face
of the fixed die B is arranged on an incline, and that of the movable die C is about
perpendicular, so that there is a large space between the dies at the top for the
reception of the material, which space gradually diminishes towards the base of the
dies where the crushed material is discharged. The face of the fixed die is provided
with two corrugations 1, l, formed of two hollow parts, and a central rib between
them, and the face of the movable die is provided with two corresponding
corrugations r, r, formed of two cheeks and a recess between them opposite the
rib. Extending longitudinally across the corrugations are a series of angles n, n,
there being generally about three angles on each corrugation, and these angles on
the cheeks form projections, and on the hollow parts form angular depressions, by
means of which the dies obtain a firm bite or hold on the material to crush it.
The space between the angles n, n, may be either straight or curved, as desired, the
different shape of angles being fully illustrated in the several Figures. The angles
on the fixed die may be also made to form projections with curved depressions
between them, but this construction is not deemed so efficient. Extending from
about the centre of the dies to their bases are a series of longitudinal lips y which
gradually increase in height toward the base, at which point they extend furthest
from the dies. The spaces z between the lips are slightly broader than the faces of
the lips, and the lips on each die are opposite the spaces on the other die, the lips
on the movable die breaking joint with and playing into the spaces on the fixed
die when they are set close, so that the crushed material must fall through the
spaces between the lips, and must be crushed to a size small enough to fall
through. The lips also serve to turn over or tilt the material by the lateral move-
ment of the dies, so that long pieces are thrown over and caught by the lips and
broken still smaller.
The operation of these dies is as follows:-By means of the arm D' of the jaw D
lateral vibration or motion is imparted to the die C, which causes it to travel
back and forth across the face of the fixed die B, by which the cheeks on the
movable die alternately approach and recede from the hollow parts of the fixed die,
the cheek on one side approaching when that on the other side recedes, so that the
the operation of crushing is continuous in one side or other of the dies. The ore
or other material is fed at the top of the machine, and is caught in the angular
faces of the dies and crushed between them, the angle on the faces giving the dies
a much stronger bite or hold than where the ordinary curved dies are used, and
enabling them to crush or grind it more easily. As the material falls between the
dies it is gradually crushed smaller until caught by the lips y, by which it is given
a final break, the broken material being tilted or thrown over by the lips on the
lateral movement of the dies from side to side, so that no long pieces can pass
through. As the lips break joint and fit between each other the material must be
crushed small enough to pass through the spaces z between the lips, and hence a
more uniform and even size of material is obtained. The crushed material is
permitted to fall from between the dies on either side alternately as they open on
one side when closing to crush on the other.

page_text: '
Where the dies are constructed to both crush and pulverize the material, as
shown in Figs. 2, 3, 4, and 5, they are mounted in the machine as above described,
the fixed die B being inclined, and the movable die C about perpendicular. The
upper parts of the dies are formed with the corrugations and r, and with the
series of angular projections or depressions n extending longitudinally across their
faces as above described. Towards the base of the fixed die the central rib l¹
gradually fades away, and thus forms a concave part m at the base, this concave
being slightly larger than an arc of a circle described from the pivot of the movable
jaw.
The working face of the movable die C is about perpendicular, and the upper
portion of the die is formed with the corrugations r corresponding to the corru-
gations of the die B, the cheeks of the movable die being opposite the hollow
parts of the fixed die. The corrugations on the dies B and C being also formed
with the angles n extending longitudinally across their faces, obtain by these angles
a firm hold on the material, as above set forth.
The base of the die C extends out so as to form the convex portion & fitting into
the concave m on the fixed die, the curve of the convex base being an are slightly
smaller than that of the concave. The lower edge of the convex base of the
movable die is serrated or angular, the serrations extending up into the face of the
die and forming a series of crushing and grinding edges u, and a series of clearances v
between them, the serrated base greatly increasing the delivering surface at the
base of the die, and enabling it to pulverize and deliver over double the amount
where a straight base is used. Above the serrated base, and extending down
between the serrations, are a series of tapered pockets t, in which the crushed
material falls, and from which it is fed to the crushing edges u to be pulverized.
To prevent the passage of any unpulverized material on either side of the movable
die, or the passage of any pulverized material back into the bearings of the jaw to
clog it, a false plate w is placed within the bed frame on either side of the movable
die, extending along and below the die (as shown in dotted lines, Fig. 2), and
secured by bolts w₁ at the top and bottom, by means of which it can be adjusted
against the face of the die so as to close the opening on either side of the die. This
false plate is also used with the dies employed for crushing only.
The dies are generally formed of cast iron, being cast on a chill or in sand, as
desired, but for pulverizing tale, pottery clay, and other material that would be
injured by any particles of iron ground off the face of the dies, the dies are made
of a hard non-metallic substance, such as burr stone or other hard stone, glass,
baked clay, or other refractory material, which, if ground off by the operation of
crushing, will have no deleterious effect on the material crushed. As the peculiar
lateral grinding motion of the dies has not so great a wear or strain on them as the
direct "crush" usually employed in crushing, dies made of these substances will be
found to wear well and prove satisfactory in machines having the operation above
set forth.
When the improved crushing and pulverizing dies are employed, the operation
of the machine is as follows:-The machine having been mounted as above
described, the fixed die B is adjusted according to the fineness to which the ore or
other material is to be reduced. This is accomplished by means of the taper bar f,
which is driven in or drawn out as the opening at the base of the dies is to be
diminished or increased, the die working on its pivot bearing b, and the wedges b³
are then driven into place and hold the fixed die stationary. The opening at the
top of the dies varies according to the size of the crusher, being generally about
four inches across between the dies. A reciprocating motion is imparted to the
long arm D¹ by suitable power connections, which in turn imparts a lateral
vibration or motion to the jaw D and its die C across the face of the die B, and
causes the corrugations at the top of the movable die to alternately approach and
recede from the corrugations of the fixed die, and the convex of the movable die
to travel backwards and forwards with a part crushing and part grinding motion
within the concave of the fixed die. The material to be pulverized is fed into the

page_text: space between the jaws at the top, and the cheeks of the die C crush it against the
face of the die B, the material gradually sinking as the cheeks alternately recede,
and being reduced still smaller as the cheeks advance, and by a crushing and
grinding motion press it against the face of the die B. The angular shape of the
corrugations and r gives the dies a strong bite or hold on the ore and enables
them to break it more easily. As the material sinks to the lower part of the dies
where their faces are close together, it is gradually reduced to small lumps or
particles and then falls into the pockets t, and is fed through the pocket, to the
crushing and grinding edges u, which edges, by the lateral vibration of the die,
partly crush and partly grind the material against the face of the fixed die and
thoroughly pulverize it, the pulverized material being thrown out by the lateral
movement of the die into the clearances v and falling from the machine. During
the operation of the dies, whether in crushing only or in crushing and pulverizing,
the jaw D is prevented from rising by any heavy strain on the lower part of its
working face or die by the pivotted bearing d, which extends below the die and
braces it within the bed. The die C is also prevented from being raised by the
crushing strain, because it is secured in place by a tapered dove-tail fitting in from
below. The hollow semi-circular lip i and false plates to prevent the passage of
any pulverized material into the working parts to clog them.
Having now described and particularized the said Invention, in such manner
that others will be enabled to carry the said improvements into effect I claim,-
1st. In machines for crushing ores and other materials, the combination of a fixed
corrugated die and a laterally movable corrugated die, the said dies being provided
with a series of angles extending longitudinally across the faces of the corrugations,
substantially and for the purposes set forth.
2nd. In machines for crushing ore and other material, the combination of a
fixed corrugated die and a laterally movable corrugated die, the lower part of said
dies being provided with a series of lips extending out from the surface of the
dies, the lips of one die fitting between those of the other, substantially as and for .
the purposes set forth.
3rd. In machines for crushing ores and other material, the combination of a fixed
die and a laterally movable die, the dies being provided with a series of angles
extending longitudinally across their faces, and a series of lips extending out from
the surface of the dies, the lips of one die fitting between those of the other,
substantially as and for the purposes set forth.
4th. In machines for crushing ores and other materials, the combination of a
fixéd die or jaw having its upper part corrugated and its base concave, and a
laterally movable die or jaw, having its upper part corrugated and its base convex,
substantially as and for the purposes set forth.
5th. In machines for crushing ores or other material, the combination of a fixed
die or jaw, having a concave portion at its base, and a laterally movable die or
jaw, having a correspondingly convex portion at its base, substantially as and for
the purposes set forth.
6th. The combination with the fixed die having a concave base and a series of
serrations formed along the convex base, substantially as and for the purposes
set forth.
7th. In combination with the fixed die having a concave base, the laterally
movable die having a convex base, and a series of pockets and serrations formed
along said convex base, substantially as and for the purposes set forth.
8th. The laterally movable die C provided with the hollow semi-circular lip i,
substantially as and for the purposes set forth.
9th. In combination with the laterally movable die C the adjustable false plate w
secured within the bed frame, substantially as and for the purposes set forth.
10th. In combination with the fixed die B baving the pivot bearing b and the
tapered back at the base, the tapered bar and bed frame A', substantially as and
for the purposes set forth.
11th. In combination with the fixed die B having the tapered back at the base,

page_text: the tapered bar f, wedges 62, 62, and bed frame A', substantially as and for the
purposes set forth.
12th. In machines for crushing ores and other materials, the combination of a
fixed die and a movable die, mounted so as to crush the material against the fixed
die, said dies being formed of non-metallic refractory material, substantially as
and for the purposes set forth.
In witness whereof, I, the 'said John Thomson King, have hereunto set my
hand and seal this Fifteenth day of July, in the year of our Lord One
thousand eight hundred and eighty one.
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