IMPROVEMENTS IN MACHINES FOR CRUSHING STONE, ORES, AND OTHER HARD SUBSTANCES
Year: 1882

page_text: LETTERS PATENT to George Dalton of Soho Foundry Leeds in the County
"
of York for an Invention of "IMPROVEMENTS IN MACHINES FOR CRUSHING
STONE, ORES, AND OTHER HARD SUBSTANCES Communicated to him from
abroad by Samuel Lowe Marsden of New Haven Connecticut United States
of America
PROVISIONAL SPECIFICATION left by the said George Dalton at the Office
of the Commissioners of Patents on the 27th October 1882.
GEORGE DALTON of Soho Foundry Leeds in the County of York " IMPROVE-
"
MENTS IN MACHINES FOR CRUSHING STONE, ORES AND OTHER HARD SUBSTANCES
a communication to me from Abroad by Samuel Lowe Marsden of New Haven,
Connecticut, United States of America
This Invention relates to that class of crushers styled "jaw crushers" and its
object is to construct a less expensive and more durable and effective machine than
that hitherto produced
According to the said Invention in place of the flat fixed jaw plate in common
use in stone and ore crushers of this class a cylindrical jaw is used which is
preferably constructed in cylindrical sections but may consist of a single casting
and may have either a smooth or a corrugated crushing surface or the surface may
be provided with teeth or studs. This improved jaw has the advantage of
presenting a broader wearing surface than a flat plate in a frame and the said jaw
may when one face is worn be turned to present a fresh or unworn face towards
the opposite jaw and the relative positions of the sections may be changed at will
so that all may be made to sustain an equal amount of wear. Preferably these
sections are cast with a central bore and a surrounding ring of holes. In the bore
of each section is fixed a cross bar by which the sections may be raised or lowered
and in the said holes pins may be inserted for holding the sections in position.
The cylindrical jaw rests on lugs projecting inwards from the sides of the frame
and is held down in place by a key that lying across the top of the upper section
is passed through the slots of the hopper frame plates and through lugs that are
formed on the said plates especially for the reception of the said key

page_text: The improved swinging or moveable jaw plate has a corrugated concave face
whose curve corresponds with that of the fixed cylindrical jaw being in its general
outline equidistant therefrom at every point throughout its width. Hence it will
be seen that a wider crushing surface is afforded by these curved jaws than there
would be by straight or flat jaws of the same breadth and these curved or convex
and concave jaws not only present a more extended crushing surface but they are
also especially adapted because of their curves to the crushing of slabs or plates
of stone or other substance which are apt to pass unbroken or but partially
reduced out from between the ordinary flat jaws. The moveablo jaw plate is
adapted to be fixed in place with either end uppermost and it may have its face
bevelled off at either or both ends if it be desired to enlarge the opening between
the jaws at the top or bottom thereof. The said plate is held in place partly
by studs that project from the swinging jaw and enter inclined plate sockets and
partly by a screw bolt
On the outer faces of the hopper frame plates are lugs that form jaws or sockets:
for securing the hopper in place =
The tozzle lever employed resembles a form that has been hitherto used but it
has been found desirable to substitute for the car in that lever a renewable and
adjustable concave bearing which is set in a corresponding socket made in the
back of the head of the said lever and is made adjustable therein by means of
a set-screw or.screws
The tozzle block is also made vertically adjustable by means of an attached screw
that passes up through the frame and has a nut on its upper end-The said tozzle
block has also a socket in its face in which is adjustably held by a set screw a
-fulcrum-or-bearing-which projects-into-the concavity-of-the-lever-bearing.In
face-also of the tozzle lever is a socket in which is adjustably held_by_a.set-screw a.
tozzle bearing or fulcrum and in the back of the swinging jaw a tozzle bearing or
fulcrum is adjustably held by a set screw in a socket
the

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Dalton in the Great Seal Patent Office on the 27th April
1883.
"
GEORGE DALTON of Soho Foundry Leeds in the County of York "IMPROVE-
MENTS IN MACHINES FOR CRUSHING STONE ORES AND OTHER HARD SUBSTANCES
a communication to me from Abroad by Samuel Lowe Marsden of New Haven
Connecticut United States of America
This Invention relates to that class of crushers styled "jaw crushers" and its
object is to construct a less expensive and more durable and effective machine
than that hitherto produced.
The said Invention consists in the combination of an upright cylindrical jaw with
an opposite concave jaw plate between which the stone is broken and further of
adjustable and renewable lever and toggle bearings or fulcra as hereinafter more
fully described.
And in order that the said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of
reference indicating corresponding parts in all the Figures.
Figure 1 is a sectional side elevation of the improved crusher Figure 2 is a
plan of the same-Figure 3 is a plan of a cylindrical jaw with smooth crushing
surface Figure 4 is a plan of a cylindrical jaw with a corrugated or toothed
crushing surface-Figure 5 is an enlarged rear elevation of an improved adjustable
toggle block carrying an adjustable lever fulcrum and Figure 6 is a side elevation
of the same.
A represents the frame of the machine; B. B, the fly wheels, C. the driving
pulley, D. the crank shaft, E. the pitman, F. the wedge for adjusting the toggle
block, G. the toggle, H the moveable or swinging jaw. I. the fixed jaw and K. the
cheeks all of which parts are well known and understood and hence require no
further description.
According to this Invention instead of the flat fixed jaw plate in common use in
stone and ore crushers of this class a cylindrical jaw is used as shewn at L which is
preferably constructed in Sections L' as indicated clearly in Figure 1. but it may
consist of a single casting and may have a smooth crushing surface as shewn in
Figure 3 or a corrugated crushing surface as shewn in Figure 4 or the surface may be
furnished with projecting teeth or studs if so desired-This cylindrical jaw L. has
the advantage of presenting a broader wearing surface than a flat plate in a frame
of given width and the said jaw L. may, when one face is worn, be turned partly
or wholly around to present a fresh or unworn face toward the opposite jaw and
the relative positions of the Sections L'. may be changed at will so that all may
be made to sustain an equal amount of wear, Hence it will be seen that this
cylindrical jaw L. will endure two or three times more wear than will the ordinary
flat jaw plate which latter also requires to be carefully planed or seated so that it
may fit properly upon its seat while no labor or expense of this character is
requisite for the adjustment of the cylindrical jaw-Thus the advantages of the
improved cylindrical jaw over the common flat jaw plate are clearly manifest-
Preferably the Sections L'. are cast with a central bore a and a surrounding ring of
holes b-In each bore a is fixed a crossbar c by which the Sections L. may be
moved and in the holes b pins as at d may be inserted for holding the Sections L'.
joined and fixed together in position as shown in figure 1 the said pins resting upon
suitable stops-This cylindrical jaw L when in position rests on lugs / that project
1.
i

page_text: inward from the sides of the frame A and is held down in place by a key M. that
(lying across the top of the upper Section L') is passed through the slots g of the
hopper frame plates M. and through the lugs h that are formed on the said
plates M' for the reception of said key M.
The improved swinging or moveable jaw plate N. has a corrugated concave face
whose curve corresponds with that of the jaw L. being in its general outline
equidistant therefrom at every point in any line throughout its width. Hence it
will be seen that a wider crushing surface is afforded by these curved jaws than
there would be by straight or flat jaws in a machine of the same breadth and these
curved or convex and concave jaws not only present a more extended crushing
surface but they are also specially adapted because of their curves to the crushing of
slabs or plates of stone or other substance which are apt to pass unbroken or but
partially reduced out from between the flat jaws of ordinary crushing machines-
The jaw plate N. is adapted to be fixed in place with either end uppermost and it
may have its face bevelled off at either end or at both ends of it be desired to
enlarge the opening between the jaws at the top or bottom thereof-The said
plate N. is held in place partly by the studs that project from the swinging jaw H
and enter the inclined plate sockets and partly by a screw bolt m.
On the outer faces of the hopper frame plates M' are lugs n which form jaws or
sockets for securing the hopper in place which hopper is not shown in the drawing.
O represents the toggle lever whose long horizontal arm is connected to the
crank shaft D by the pitman E-This lever O is in its general features similar to a
form that has hitherto been used but it has been found desirable to substitute for
the ear in that lever a renewable and adjustable concave bearing o which is set in
a corresponding socket o made in the back of the bead of the lever O and is made
adjustable therein by means of one or more set screws.o².
The toggle block P is in this machine also made vertically adjustable by means
of an attached screw p that passes up through the frame A and has a nut p³ on its
upper end-This toggle block P has also a socket 9 in its face in which is
adjustably held by a set screw q' a fulcrum or bearing 9-which-projects-into the
concavity of the lever bearing o-In the face also of the lever o is a socket r in
which is adjustably held by a set screw r¹ a toggle bearing or fulcrum 7 for one
end of the toggle G and in the back of the swinging jaw H a toggle bearing or
fulcrums for the other end of the toggle G is adjustably held by a set screw &¹ in
a socket Hence it will be seen that all of the lever and toggle fulcra or
bearings may be adjusted removed replaced and renewed whenever desired or
when the parts become worn whereby the renewal of more expensive parts of
the machine may be avoided and whereby a more accurate adjustability of the
parts may be had to the line of the greatest strain or pressure.
The wedge F is capable of vertical adjustment by means of the screw f and
nut and is used for adjusting the opening at the mouth of the machine and
also for taking up the wear of the jaw faces and to this in itself alone I lay no
claim. The toggle block P is arranged to give more or less motion to the machine
by raising or lowering the centre of the fulcrum by means of the screw q² and
nut h¹ This toggle block P may be used with such other stone or ore crushing
machines as it is or may be applicable to.
The combined rod spring t and nuts & serve to retract the jaw H after each
forward motion.
Having now described and particularly ascertained the nature of the said
Invention and the manner in which the same is or may be used or carried into
effect I do not broadly claim adjustable or renewable fulcra or bearings in a stone
breaker but what I consider to be novel and original and therefore claim as the
Invention secured to me by the herein before in part recited Letters Patent is.
First In a stone and ore crusher the combination of an upright cylindrical fixed
jaw and an opposite concave swinging jaw plate substantially as hereinbefore
described and illustrated in the accompanying Drawings.
Second-In a stone and ore crusher a fixed-cylindrical jaw constructed in

page_text: sections and provided with suitable devices whereby they may be placed in or
lifted from position and devices whereby they may be united to each other
substantially as herein before described and illustrated in the accompanying
drawings.
Third In a stone and ore crusher as a means for holding the fixed jaw down
in place the combination of the transverse key M. slotted plates M². and lugs h
substantially as herein before described and illustrated in the accompanying
drawings.
Fourth A stone and ore crusher constructed substantially as hereinbefore
described and illustrated in the accompanying drawings containing the following
elements in combination namely a cylindrical jaw an opposite concavo jaw plate
a toggle lever with a socketted head an adjustable socketted toggle block an
adjustable lever and toggle fulcra or bearings all arranged substantially as herein-
before described and illustrated in the accompanying drawings.
Fifth In a stone and ore crusher the combination with the toggle lever O
having the rear head socket o' of the adjustable bearing o substantially as and for
the purpose hereinbefore described and as illustrated in the accompanying
Drawings.
Sixth In a stone and ore crusher the combination with the toggle lever O
having face socket r toggle G and swinging jaw H having rear socket s' of the
adjustable toggle bearings 8 substantially and for the purposes hereinbefore
described and as illustrated in the accompanying drawings.
Seventh-In a stone and ore crusher the combination with the toggle lever O
having a rear head socket o¹; and provided with adjustable bearing o, of the toggle
block P having face socket g and adjustable lever fulcrum q substantially as
herein before described and illustrated in the accoinpanying drawings.
Eighth In stone and ore crushers the employment of the adjustable .toggle
block P for adjusting the motion of the machine substantially as hereinbefore
described and illustrated in the accompanying Drawings.
In witness whereof I the said George Dalton have to this my Specification
set my hand and seal this twenty-sixth day of April, in the year of Our
Lord One thousand eight-hundred and eighty three.