IMPROVEMENTS IN STONE AND ORE CRUSHERS
Year: 1885

page_text: [Communicated from abroad by Daniel Brennan, junior, Contractor and
Inventor, of the Town of Bayonne, in the County of Hudson, State of New
Jersey, and Gilbert Grey Young, Merchant, of the City of Brooklyn, in the
County of Kings, State of New York, both in the United States of America.]
"
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
STONE AND ORE CRUSHERS (a communication to me from abroad by Daniel
Brennan Jr, Contractor and Inventor, of the Town of Bayonne in the County of
Hudson, State of New Jersey and Gilbert Grey Young, Merchant, of the City of
Brooklyn in the County of Kings, State of New York, both in the United States
of America) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The object of this invention is to improve the construction of stone and ore
crushers in such a manner that they can be made of greater capacity than has
heretofore been practicable without too much increasing their weight And as the
notion or thrust of the lower ends of the movable jaws in stone and ore crushers
should not exceed a fixed amount proportioned to the size of the uniform product
required, for the reason that however close the jaws inay approach each other on
the forward or crushing stroke, the size of the product will depend upon the
distance to which the movable jaws recede, and the uniformity of the product will
depend upon the said distance being kept always the same, consequently a further
object of the invention is to provide stone and ore crushers constructed in such a
manner that the lower ends of the movable jaws can be readily adjusted to have
more or less movement, independent of the movement of the said jaws at their
upper ends and when adjusted will be prevented from exceeding the fixed limit,
thereby adapting them to reduce the material more uniformly and to a smaller size
than such machines heretofore made..
A further object of the invention is to provide efficient and reliable means for
lubricating and for controlling and regulating the various parts of the machines.
The invention relates to a stone and ore crusher constructed with the ends of the
frame hollow whereby great strength is obtained without too much weight.
i

page_text: The frame is constructed with a head block provided with flanges against which
the shaft that carries the movable jaw is held by U bolts whereby the said movable
jaw will be firmly supported, and held against upward thrust and rearward
pressure The movable jaw is made in two parts hinged to each other near their
upper ends and provided with mechanism to regulate the movement of the lower
end of the forward part independent of the movement of its upper end. The
adjustable forward part of the movable jaw is made with a slot and a transverse
perforation at each end to adapt the said part to be reversed as it becomes worn-
The upper end of the rear part of the movable jaw has a forwardly projecting
curved shoulder formed upon it, against which the upper end of the forward part
of the said jaw is held by a hook bolt and a spring, whereby the said forward part
of the jaw will be hinged to the said rear part, will be firmly supported against
upward thrust, and will have a slight yield when its lower part is subjected to
undue strain-Upon the forward side of the rear part of the movable jaw is formed
a projection which fits into a corresponding recess in the rear side of the forward
part of the jaw, to strengthen the connection between the two parts-The lower
end of the forward part of the movable jaw is connected with the frame by a cam
or cams having a toothed section and provided with a coiled spring or springs
arranged to turn the said cam or cams forward, an adjustable pawl whereby the
movement of the said lower end of the forward part of the movable jaw will be
limited The adjustable pawl is provided with an eye bolt having a screw sleeve
locked in place by a jam-nut, whereby the said pawl will be held from being swung
back by the pressure of the spring.
With the lower rear part of the sides of the frame is connected an oil chamber
having inlet and outlet pipes and provided with bearings to receive the intermediate
bearings of the eccentric shaft, whereby the said eccentric shaft can be kept
lubricated and cool-The eccentric shaft is made with spirally arranged eccentrics
and with bearings between the adjacent eccentrics whereby the pressure upon the
shaft will be distributed and the said shaft firinly supported-The end bearings for
the eccentric shaft are provided with annular grooves to receive packing to prevent
the oil from escaping around the said shaft.
With the lower forward parts of the sides of the frame is connected a foot block
provided with flanges having bearings to receive the cam shaft whereby the said
cam shaft will be firmly supported-The front end of the frame is provided with
recessed projections to receive the bolts that fasten the recessed ends of the
stationary jaws, whereby the said jaws will be securely held in place and can be
readily reversed-The thrust bar is made with a forked lower end to receive
an eccentric, and recesses in its upper end to receive the toggle bearings-Between
the rear part of the movable jaw, and the thrust bar is interposed a toggle bar
having an apertured middle part whereby the said toggle bar will break if exposed
to undue pressure, to prevent injury to the machine-Between the thrust bar and
the back block is interposed a strong toggle bar of ordinary construction-Between
the lower end of the back block and the set screws of the supporting bars is
interposed a spring whereby the said back block will be held to its seat and kept
from injuring the said set screws by its movements.
Between the upper ends of the back blocks and their respective bearings are
interposed lining pieces by the replacing of which by others of different thicknesses,
the angles of the toggles and the amount of movement of the rear parts and of the
upper ends of the forward parts of the movable jaw may be varied-Between the
projecting lower ends of the wedges, and the jaw rods and their springs are
interposed elbow levers pivoted to a shaft attached to the machine frame, whereby
the said springs will be kept at the same tension-With the worms and worm shaft
and the wedge screws and their supporting web are connected perforated worm
wheels, nuts having perforated flanges and locking pins, and a stay bar and its
standards and screw bolts, whereby the wedges can be adjusted together or
separately-Between the thrust bar and the back block bearing is interposed a

page_text: spring to hold the said thrust bar in place, should the toggle bar break as will be
hereinafter fully described.
Reference is to be had to the accompanying drawings forming part of this
Specification in which.
Figure 1 is a side elevation of one of the improved stone and ore crushers, the
eccentric shaft being shown in section.
Figure 2 is a sectional side elevation of the same.
Figure 3 is a front elevation of a part of the same.
Figure 4 is a rear elevation of a part of the same.
Figure 5 is a plan view of the same.
Figure 6 is a sectional elevation of the rear part of the frame.
Figure 7 represents the under side of the head block, the sides of the frame being
shown in section.
Figure 8 is a sectional plan view of the lower part of the frame.
Figures 9 to 24.inclusive are views of various parts of the machine in detail.
A, represents the sides of the frame of the machine. B, is the front end of the
frame, which has a projection C, upon the forward part of its top and bottom-In
the projections C, at suitable distances apart are formed holes to receive the bolts D,
that fasten the ends of the stationary jaws E, to the said end B.-In the
projections, C, are formed recesses F, to receive the nuts of the bolts, D, and in the
ends of the jaws, E, are formed recesses, G. to receive the heads of the said bolts.
Both ends of the jaws E. are made alike, so that the said jaws can be reversed
when they become worn at one end.
The front end B, and the rear end H, of the frame have cavities, I, formed in
them in casting to obtain greater strength with the same amount of metal-The
cavities I after passing through the sides of the frame become larger, as shown in
Figure 2 and in dotted lines in Figure 1.
With the inner side of the top of the rear end H, is connected by an inclined
web J. the bearing K, for the back block L-The bearing K, is also connected with
the sides A, of the frame-The bearing Kis further strengthened by flanges M,
formed upon the inner side of the end H, between the back blocks Las shown in
Figure 6-With the flanges M and the sides A, of the frame is connected 'the
supporting bar N, through which are formed screw holes to receive the set screws O,
for the purpose hereinafter described.
The forward middle parts of the sides A, are extended upward and to them are
secured the ends of the head block P, upon the lower side of which are formed
flanges Q, having half bearings in their lower edges for the jaw shaft R, to rest
against to strengthen the said shaft against the pressure of the jaws-The shaft R,
is drawn and held against the bearings in the flanges Q by the U-bolts, S, the
bends of which pass around the said shaft and their arms pass through the said
flanges Q, and the head block P as shown in Figures 2 and 3 and are secured in
place by nuts T, screwed upon their ends.
The rear parts of the sides, A, of the frame are extended downward and to them
is secured a trough, U, see Figures 1, 4, 5 and 8, to form an oil and water chamber
for lubricating and cooling the eccentrics V of the shaft W, the end journals of
which revolve in bearings attached to the said sides A-To the front and rear
walls of the chamber U are attached bearings X in which revolve the journals Y,
see Figures 5 and 9 formed. upon the shaft W. between the adjacent eccentric or
cranks V so that the said shaft will be firmly supported against downward pressure―
The water is introduced into one end of the trough U near its bottom through a
pipe Z, secured in a hole in the lower part of the side A, of the frame; and escapes
through a pipe a the inner end of which extends nearly to the bottom of the said
trough U and which passes through the side of the trough at such a height that
the eccentrics V and the journals Y of the shaft W will always be in contact with
the oil poured upon the surface of the water passing through the trough U, and will
thus be kept, lubricated With this construction the arrangement of the discharge
pipe a prevents the oil from escaping so that a stream of water can be made to pass

page_text: constantly through the trough U to keep the oil and with it the eccentrics V. and
journals Y cool.
In the end bearings formed in the sides A of the frame for the eccentric shaft W,
are formed grooves b see Figure 8 to receive packing rings placed upon the end
journals of the said shaft to keep the oil from escaping around the said journals.
The forward parts of the sides A, are extended, downward and to them are
attached the ends of a foot bar or block c which is strengthened by a flange d along
its inner edge, and is provided with webs or bars e to serve as bearings for the
cam shaft the ends of which rest in bearings in the sides, A of the frame. g are
cheek or wear plates which are placed in recesses in the sides A at the outer edges
of the outer jaws E, and j. k as shown in figure 2-The wearing faces of the
jaws E, j may have the shape shown in Figure 5, or any other suitable shape.
The movable jaws are each made in two parts j, k,-The upper end of the
forward part j is hinged to the part k near its upper end by the pin 7 passing
through the said part ; and the hook bolt m hooked upon the said pin, and passing
through the part k nearly at right angles therewith, where it is secured in place by
nuts n see figures 2 and 5-A washer o and a spring p of rubber or other suitable
material are interposed between the nuts n and the jaw k to allow the said hook
bolt and jaw to have a slight movement and thus prevent undue strain should the
movable jaw come too close to or touch the stationary jaw-With this construction
the hook bolt m can be withdrawn in a direction over the front end B. of the frame,
so that the forward part j of the movable jaw, can be removed or reversed without
taking out the rear part k―The ends of the parts j are slotted to receive the hook
bolts m and in the rear sides of the said parts just below the pins are formed
rounded recesses 9 to receive correspondingly shaped projections r formed upon the
forward sides of the rear parts k-The upper end of the rear part of the movable
jaw is slotted to receive the flange Q and U,-bolts S; it is perforated to receive the
shaft R and is extended forward to form a shoulder 8 to receive the thrust of the
part of the said movable jaw.
The shoulders is concaved and the upper end of the part j is correspondingly
rounded so that the two parts will move easily upon each other.
In the lower part of the rear side of the part k of the movable jaw is formed a
recess to serve as a seat for the bearing h of the toggle bar t the middle part of
which is enlarged and has an opening u formed through it so that the said bar will
break if subjected to an undue pressure and thus prevent the other parts of the
machine from being broken-Toggle barst of different lengths are provided, so
that if the other adjustments should become exhausted from the wear of the parts,
a longer toggle bar can be put in-The rear ends of the toggle bars t rest in
bearings placed in recesses in the forward upper part of the thrust bar v (as
shown in Figure 2.) the lower end of which is forked as shown in Figures 2 and 11
to receive and ride upon the eccentric V of shaft W, where it will be held in place
by its own weight and the downward pressure upon it, no strap or cap being
required.
Upon the opposite sides of the upper part of each thrust bar v are formed hubs
or projections w so that the thrust bar can be easily fitted to work inside the frame
and against each other without being too tight and a recess is formed in the rear
side of the upper end of the thrust bar to receive a bearing a Figure 2 for the
toggle bar y The toggle bearings h¹ x are held down to their seats by a disc =
placed upon the upper end of the thrust bar and secured in place by an eye
screw 1 that passes through it and into a screw hole in the upper end of the said
thrust bar v. With this construction the toggle bearings can be readily removed
and changed when desired.
To the eye screw 1 is attached the end of a spiral spring 2 the other end of
which is attached to a screw 3 inserted in a screw hole in the lower part of the
forward side of the back block bearing K-The spring 2 is designed to hold the
thrust barv in place, and prevent it from breaking the machine in case the toggle
bart should break,

page_text: To the lower end of the back block L is secured by screws or other suitable
means the upwardly curved middle part of a spring 7, the end parts of which rests
upon the upper ends of the set screws, O, herein before described--The spring 7,
holds the back block L, up against the bearing K, and prevents the set screws O,
from being injured by the movements of the back block L, when the wedge 8, is
adjusted-The set screws O, enable the wear to be taken up so that the spring 7,
will always hold the back block L, closely against the bearing K,-Between the
upper ends of the back blocks L, and their bearings K, are interposed lining pieces ¿
by the replacing of which by others of different thicknesses the angles of the
toggles and the amount of movement of the rear parts, and of the upper ends of the
forward parts of the movable jaws may be varied.
A wedge 8 (see Figure 2) is inserted narrow end upward between the back
block L, and the inclined inner surface of the rear end H, of the frame.
The upper end of the wedge 8 is provided with a screw bolt 9 which passes up
through holes in the inclined web J, and through holes in a stay bar 10 resting on
hollow standards 11 and secured in place by screw bolts 12 passing through the
said stay bar and hollow standards and screwing into the frame of the machine.
Upon the bolts 9 between the web J, and the stay bar 10 are placed the loose
worm wheels 13 and the nuts 14, the latter having outwardly projecting flanges 15
formed around their lower parts which are perforated to receive the pins 16-The
pins 16 after passing through the flanges 15 enter corresponding holes in the worm
wheels 13 so that the nuts 14 will be turned to raise and lower the wedges 8 by
turning the worm wheels 13 and so that by removing the pins 16 the nuts 14 can
be turned with a wrench to adjust each wedge 8 separately as the unequal wear of
the jaws may require-The nuts 14 when turned in the direction to lower the
wedges 8 are held in place against the upward pressure by the stay bar 10-The teeth
of all the worm wheels 13 mesh into the threads of worms 17 attached to a shaft 18
which revolves in bearings attached to the frame of the machine, and is provided,
at one end with a hand wheel 19 so that it can be readily turned to raise or lower
all the wedges 8 at one operation-The forward part of the lower end of each
wedge 8 is extended downward and rests upon the upper side of the long arm of an
elbow lever 20 (see figure 2) which is pivoted at its angle, to a shaft 21 carried on
bearings 22 attached to the lower part of the rear end, H, of the frame-The
lever 20 is strengthened by webs, as shown in Figures 1. 2. 22 and 23, and is
arranged with its short arm projecting downward having two holes formed through
it, through which pass the rear ends of the jaw rods 23 24 to which are secured by
nuts 26 springs 27 of rubber or other suitable material-The rods 23. 24 pass
forward upon the opposite sides of the thrust bar v and their forward ends are
attached respectively to the rear sides of the lower ends of the rear and forward
parts k, j, of the movable jaw, and with their springs are designed to draw the said
jaws h, j, back after making a stroke-The levers 20 are so proportioned and placed
that a movement of the wedges 8 causes a corresponding movement of their shorter
and longer arms, so as to keep the springs 27 at the same tension at every part of
the travel of the said wedges, thus avoiding the necessity of stopping the machine
and regulating the tension of the springs every time the wedges 8 are adjusted―
The tension of the springs 27 can be adjusted separately as required from the
unequal wear of the jaws, by means of the nuts 26.
The forward part of the movable jaw is thrust forward towards the stationary
jaw E, to crush intervening material by the forward movement of the rear part k
of said movable jaw which rear part is forced forward by the toggle bar t operated
by the thrust bar and the eccentric V, of shaft W,-As the parts j k after making
a stroke are drawn back by the rods 24, 23, and the springs 27 the rear part k can
follow the toggle bar t to the end of its movement, as the thrust bar v decends, but
the rearward movement of the lower end of the forward part j, is arrested and
limited by the said lower end coming in contact with the cam 4 carried by the
shaft f, which passes through the said cam and through the sides A, of the frame,
and is kept from turning in the said frame by keys ō-The cam 4 which is free to

page_text: turn upon the shaft f, is provided with a toothed segment 6 formed upon, 'or
attached to it, and is connected with the shaft f, by a spring 25 coiled around and
secured at its inner end to the said shaft by a screw bolt-The outer end of the
spring 25 is secured to the cam 4 by a screw bolt, and the said spring is coiled in
such a manner as to revolve the said cam 4 when released, forward or in such
a direction as to bring its longer radius towards the forward part j of the movable
jaw and thus lessen the rearward movement of the said part j-The cam 4 is held
from being turned by the spring 25 by the pawl 28 which engages with the teeth
of the segment G-The screw threaded shank of the pawl 28 passes through
a transverse perforation in the flattened middle part of the pin 29 and through the
eye of the eye bolt 30 and has nuts 31 screwed upon it upon the opposite sides of
the said pin and eye bolt, to secure the said pawl adjustably in place--The pin 29
is placed in a transverse perforation in the slotted lower end of the forward part j
of the movable jaw-With this construction by adjusting the nuts 31 the distance
to which the engaging end of the pawl 28 enters the spaces between the teeth of
the of the toothed segment 6, can be regulated, and consequently the amount
of movement allowed to the lower end of the forward part of the movable jaw
can be limited-Upon the eye bolt 30 is screwed a sleeve 32 to serve as an
adjustable extension to the said eye bolt and which is secured in place when
adjusted, by the jam nut 33 also screwed upon the said eye bolt-The extension
screw sleeve 32 of the eye bolt 30 is designed to abut against the forward part j of
the movable jaw, and prevent the pawl 28 from turning the pin 29 and swinging
back under the pressure of the spring 25.-With this construction by adjusting the
screw sleeve 32 the pawl 28 can be adjusted to enter and work squarely in the
space between any two adjacent teeth of the toothed segment 6.
In using the machine the spring 25 is wound up, the lower end of the forward
part of the movable jaw is brought into contact with the cam 4, and the pawl 28
is so adjusted as to mesh into the spaces between the teeth of the segment û for
a depth equal to the maximum amount of movement to which it is desired to limit
the lower end of the forward part j of the movable jaw-The movable jaw is then
moved forward by operating the toggle bar t to the end of its forward swing and if
it does not approach close enough to the stationary jaw E, for the work required, the
said movable jaw is adjusted forward by raising the wedges 8-In case, during this
operation, the lower end of the forward part j of the movable jaw should be moved
forward for a distance greater than the depth to which the pawl 28 enters the space
.between the teeth of the segment 6, the said segment and the cam 4 will be released
and will be revolved forward by the spring 25 until a tooth of a part of the said
segment 6 having sufficient length of radius for the purpose, catches upon the said
pawl 28 which brings forward a part of the cam 4 having a sufficient length of
radius to limit the movement of the lower end of the forward part j of the movable
jaw to the amount fixed by the previous adjustment of the said pawl 28-Any
subsequent setting forward of the jaw j, k, to take up wear, or to crush the material
finer will be followed by a like action of the cam 4 toothed segment 6 and pawl 28
so that the movement of the lower end of the forward part j of the movable jaw
will continue to be limited automatically as herein before described-If desired the
coiled springs 25 can be replaced by cords and weights, as a mechanical equivalent-
The teeth of the cam segments 6 and the engaging ends of the pawls, 28 can be made
finer or coarser according as the machine is to be used for finer or coarser crushing.
It will be observed that the limiting of the rearward movement of the lower end
of the forward part of the movable jaw does not affect the rearward movement of
the lower end of the rear part of the said jaw, or the rearward movement of the
upper ends of the two parts, so that the said upper ends of the two parts will have
a sufficient movement to crush the large pieces as they enter the machine.
It will be also observed that by removing the cam 4 or securing it in such a position
that its shortest radius will be towards the part of the jaw, the said part j will.
always rest squarely against the part k and the lower ends of the two parts will
have exactly the same movement as if the said, two parts formed a solid jaw...

page_text: Machines constructed as herein described can be made so large that a cart or car
load of stone or ore can be dumped into the space between the stationary and
movable jaws, so as to avoid laborious hand feeding.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1st In a stone and ore crusher, the ends B, H, of the frame having cavities I,
transverse to the length of the frame extending therethrough, the said cavities
increasing in diameter after passing through the sides of the frame, substantially as
set forth.
2nd In a stone and ore crusher, the combination with the sides A of the frame,
the shaft R and the movable jaws k, j, of the head block P, having bearing flanges Q.
and the U-bolts, S, substantially as herein shown and described, whereby the said
movable jaws will be firmly supported, and held against upward thrust and rearward
pressure, as set forth.
3rd In a stone and ore crusher, the combination with the parts j. k, of the movable
jaw hinged together, of mechanism for regulating the rearward movement of the
lower end of the forward part of the said jaw, substantially as herein shown and
described.
4th In a stone and ore crusher, the forward part j, of the movable jaw made
substantially as herein shown and described with a slot and transverse perforation
in each end to adapt the said part to be reversed as it becomes worn, as set forth.
5th In a stone and ore crusher, the combination with the rear part k of the
movable jaw provided with a projection having its lower side recessed, of the
forward part j, of the said movable jaw hinged to the said rear part under its
projection, substantially as and for the purpose set forth.
6th In a stone and ore crusher, the combination with the rear part k, of the
movable jaw having curved shoulders 8, and the forward part j, having slotted
upper end, of the pin, the hook bolt m, and the spring p, substantially as herein
shown and described whereby the said forward part of the jaw will be hinged to
the rear part, will be firmly supported against upward thrust and rearward pressure,
and will have a slight yield when the lower part is subjected to undue strain, as
set forth.
7th In a stone and ore crusher, the combination with the rear part k, of the
movable jaw having projection 7, of the forward part, j, having recess q, sub-
stantially as herein shown and described, to strengthen the connection between the
said parts of the jaw as set forth.
8th In a stone and ore crusher, the combination with the parts, jk, of the
movable jaw hinged together, of the rods 23, 24, the springs 27, and supporting
bearings therefor, substantially as shown aud described, whereby the lower ends
of the two parts of the said movable jaw will be drawn back independently as
set forth.
9th In a stone and ore crusher, the combination with the frame, and the forward
part of a movable jaw of a ratcheted and a spring-actuated cam and pawl connection
between the said fraine and the said lower end of the forward part, substantially as
herein shown and described.
10th The combination with the frame and the forward part j, of the movable
jaw of a stone and ore crusher, of a cam 4 having toothed segment 6, the spring 25
and the adjustable pawl 28, substantially as herein shown and described, whereby
the movement of the said lower end of the forward part of the movable jaw will
be limited as set forth.
11th The combination with the frame, the lower end of the forward part j, of the
movable jaw of a stone and ore crusher, a cam 4, having toothed segment 6, the
spring 25, and the adjustable pawl 28, of the eye bolt, 30, the screw sleeve 32, and
the jam nut 33, substantially as herein shown and described, whereby the said

page_text: pawl will be held from being swung back by the pressure of the said spring as set
forth.
12th In a stone and ore crusher, the combination with the sides, A, of the frame,.
and the eccentric shaft W, having intermediate bearings, Y, of the oil chamber U
having inlet and outlet pipes Z, a, and the bearings X, substantially as herein.
shown and described, whereby the said eccentric shaft can be kept lubricated and
cool, and will be firmly supported, as set forth.
13th In a stone and ore crusher, the eccentric shaft, W, made substantially as
herein shown and described with spirally arranged eccentrics, V, and with bearings Y
between the adjacent eccentrics whereby the pressure will be distributed and the
said shaft firmly supported, as set forth.
14th In a stone and ore crusher, the combination with the sides A, of the frame
and the cam shaft, f, of the foot block c, having flange, d, and a series of bearings, e,
substantially as herein shown and described whereby the said shaft will be firmly.
supported as set forth.
15th In a stone and ore crusher, the combination with the front end B, of the
frame, having recessed projections, C, and the stationary jaw E, having recesses G,
in their ends, of the bolts D, substantially as herein shown and described, whereby
the said jaws will be securely held in place and can be readily reversed as set
forth.
16th In a stone and ore crusher, the combination with the rear part, k, of the
movable jaw and the thrust bar v, of the toggle bar t, having apertured middle part
substantially as herein shown and described whereby the said toggle bar will break
if exposed to undue pressure to prevent injury to the machine as set forth.
17th In a stone and ore crusher the combination with the back block, L, the
supporting bar, N, and the set screws O, of the spring 7 substantially as herein
shown and described, whereby the said back block will be held to its seat, and kept
from injuring the said set screws, as set forth.
18th In a stone and ore crusher, the combination with the rear end H, of the
frame, the wedges 8, having projecting lower ends, the jaw rods 23, 24, and the
springs 27, of the elbow levers 20, and the supporting shaft 21, substantially as
herein shown and described whereby the said springs will be held at the same
tension as set forth.
19th In a stone and ore crusher the combination with the worms 17, and worm
shaft 18, the inclined web J. and the wedge screws 9, of the perforated worm
wheels 13, the nuts 14, having perforated flanges 15, the locking pins 16 the stay
bar 10, and its standards 11, and screw bolts 12, substantially as herein shown and
described, whereby the wedges can be adjusted together or separately as set forth.
20th In a stone and ore crusher, the combination with the thrust bar v, and the
back block bearing K, of the spring 2 substantially as herein shown and described,
whereby the said thrust bar will be held in place should the toggle bar break, as
set forth.