Improvements in the Construction of Ore Crushing Machinery.
Year: 1898

page_text: Date of Application, 14th Dec., 1898
Camalato Cornifination Loft 14th Sent 1800 Accented 28th Oct. 1899
PROVISIONAL SPECIFICATİON.
Improvements in the Construction of Ore Crushing Machinery.
I, RICHARD RAINSFORD, of 1, Church Court, Old Jewry, in the City and
County of London, Gentleman, do hereby declare the nature of this invention,
(a communication to me from abroad by Francis H. Cook, of Spokane, Washington,
U.S.A., Inventor,) to be as follows:-
:-
This invention relates to improvements in that class of ore crushing machinery
in which an oscillating jaw is arranged opposite to a fixed jaw, and between
which jaws the ore is crushed.
A crusher of the kind aforementioned, constructed in accordance with my
improvements, comprises a suitable frame upon which, a stationary jaw is
vertically mounted and provided with the usual. corrugated surfaces or plates.
A movable jaw is arranged opposite the stationary jaw and is supported by an
eccentrically mounted shaft, which, when rotated by means of a fly-wheel, gives
an oscillatory and reciprocatory movement to said jaw. The shaft is mounted'
in bearings which are adjustable by means of set-screws or by cams which, when
partially rotated, move the bearings, shaft, and jaw towards or from the fixed
jaw. The stationary jaw may also be made adjustable if desired, in which
case the object is effected by means of an ecentrically mounted shaft at its rear,
The upper
the shaft being adjustable by means of a lever and segment rack.
part of the movable jaw is connected to the stationary jaw by means of arms
hinged in the latter and having projecting pins on their sides entering slots or
notches in the upper end of the movable jaw. Walls on each side of the movable
end fixed jaws, form a hopper for the entrance of substance to be crushed.
Two rollers are arranged beneath the jaws, one of which is made adjustable
so as to be capable of being brought towards or removed away from the other
or fixed roller, by being journalled in brasses or bushings slidable in inclined
slots in the bearing-boxes or castings, and made adjustable by means of set-
screws and lock-nuts. Both rollers may be thus made adjustable if desired, the
slots of each bearing converging to those of the other. A spring is preferably
inserted in one of the slots and is compressed when extra hard or uncrushable
substances find their way between the rollers. The compression and power of
the spring is regulated by a set-screw and lock-nut. When one roller is fixed,
it is mounted in blocks, movable horizontally in the bearing or casting, the blocks
being kept in place by hardened steel or other breakable pins which give way when
excessive strain is applied, and thus prevent further damage to the machine.
The rollers are connected to the main shaft by means of a gear-wheel on the
shaft, and an intermediate wheel or wheels. This wheel or wheels is mounted
upon an eccentrically journalled shaft which can be revolved by means of a lever
and segment to permit of adjustment of the intermediate wheel with relation to
the previously adjusted position of the rollers.
1000

page_text: Improvements in the Construction of Ore Crushing Machinery.
I, RICHARD RAINSFORD, of 1, Church Court, Old Jewry, in the City and
County of London, Gentleman, (a communication to me from abroad by Francis
H. Cook, of Spokane, Washington, U.S.A., Inventor,) do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:—
This invention relates to improvements in the construction of that class of ore
crushing machinery in which an oscillating jaw is arranged opposite to a fixed
jaw, and between which jaws the ore is crushed.
The novel features are herein specifically indicated.
In the accompanying drawings, Figure I is a vertical section of the machine.
Fig. 2 is a vertical section on line - Fig. 1. Fig. 3 is a detail section herein-
after referred to, which illustrates the manner of locking the adjustable shaft of
one of the gears. Fig. 4 is a detail perspective view of the aforesaid adjustable
shaft and the pin for locking the same. Fig. 5 is a side view of the machine.
Fig. 6 illustrates means for adjusting the drive shaft. Fig. 7 illustrates means
for adjusting one of the crushing jaws; and Fig. 8 illustrates means for adjust-
ing the rollers hereinafter referred to.
The machine rests on legs bolted to a horizontal base frame 1. The sides of this
frame extend vertically and are provided with journal boxes for the shaft which
extends through the upper end of one of the jaws. The jaw 2, Fig. 1, stands
vertical, and the movable jaw 3 is inclined, so that a hopper space is provided
between them and the parallel sides 4 of the machine for reception of rock or
ore. The vertically extending arm 31 of the movable jaw 3 has a notch or open
slot 5 to adapt it for detachable engagement with a rod connecting the free
ends of parallel arms 6, that are pivoted to the fixed jaw 2 and lie normally
horizontal. By disengaging said pivoted arms 6 the movable jaw 3 may be
thrown back, as shewn by dotted lines Fig. 1, to allow it to be cleaned by means
of a stiff brush. In larger sizes for heavy crushing I prefer to have additional
arms pivoted to the upper ends of the movable jaws, and engaging with the fixed
jaws in similar manner to arms G.
The faces of the jaws 2 and 3 are formed of removable iron plates suitably
corrugated and secured by screw-bolts whose heads engage their bevelled edges.
The movable jaw 3 has a compound motion which is caused by an eccentric 9,
Fig. 1, on the main driving shaft 10 that passes through it. The point of engage-
ment of the jaw-arm 3 with the pivoted arms 6 is the fulcrum of the jaw 3 and
the eccentric 9 moves the latter up and down and its lower end forward and
backward. Thus the lower end of the jaw 3 has practically a rotary movement,
so that the rock or ore is subjected to a rolling and crushing pressure simul-
taneously. The eccentric 9 enables great force to be applied with comparatively
little power, and it will be seen that the fly wheel 11 on the shaft 10 when
rotated toward the stationary jaw causes the jaw 3 to apply the crushing effect
when descending, so that the full benefit of its weight is utilized. It may be
added however that this operation is practically most applicable to comparatively
large pieces of rock or ore and when no crushing rolls are employed. When the
ore is in small pieces and extra fine crushing with rolls is required, the direction
of rotation of the shaft 10 and fly wheel 11 may be reversed, since a better result
may thus be obtained.
The two crushing rolls 7 and 8 are so arranged, Fig. 1, that the rock or ore
crushed by the jaws 2, 3, falls directly into the space between their upper
sections. They rotate inward toward each other. The fixed roller 7 is connected
with the main or driving shaft 10 by gears 12 and 13, and the adjustable roll 8

page_text: is connected with said shaft by gears 131, 14, and 15, Fig. 2-that is to say, a
gear 14 is mounted on journal 17, Figs. 3 and 4 which is held in a socket in
the side of the machine and meshes with a gear 15 on the adjustable roll S and
another gear 131 on the shaft 10. To adapt the gear 14 to be shifted to accomodate
different adjustments or positions of the roll 8, its journal 17 is arranged eccentri-
cally and adapted for adjustment around a centre, as shewn in Fig. 4-that is to
say, the journal 17, Fig. 4, is formed on the end of a short shaft 19, whose larger
cylindrical end is inserted in a socket in the frame, but held somewhat loosely
therein, so that it may be rotated without difficulty when required to shift the
eccentric journal 17. Such shaft 19 has one or more flat side portions 20, and
a cotter pin 21 is inserted down through the frame to engage such flat portion,
and thus hold the shaft fixed in the required adjustment. It is apparent, that
by withdrawing the pin the position of the eccentric 17 may be changed by
rotating the shaft, and then upon replacing the pin it will hold the shaft in the
new position. The shaft may however be adjusted by means of a sector and hand-
lever as indicated in Fig. 5.
The two crushing rolls 7 and 8 are journalled in blocks 211, 22, Fig. 8, arranged
in a metal box-like parallel frame 23, arranged beneath and parallel to the base
frame 1. The shaft of the adjustable roll S is journalled in block 21' that is adapted to
slide in the frame 23 lengthwise thereof, and made adjustable therein by means of
a set screw 24 and lock-nut 25 and threaded in the end of the frame 23. The
block 22 is prevented from sliding by means of a pin 221 which will break if
any exceedingly hard and uncrushable substance enters between the rollers, thus
preventing injury to the latter. For the same purpose I adapt the jaw 2 to
yield by means of a breakable bar 29, Figs. 1 and 2, which is L-shaped in cross
section and bolted to the base of said fixed jaw and to the base proper 1.
bar 29 will sustain normal or ordinary pressure, but if a hammer or like article
comes between the jaws it will break, and thus avoid more serious consequences.
To provide for adjustment of the jaw 2, and thereby for enlarging or diminish-
ing the space between the jaws, U-shaped washers 30 of any desired thickness
may be interposed between said jaw and the bar 29.
The
Another form of adjustment, and means for preventing injury as aforementioned
to the jaws may be employed, and it consists of box-shaped frames 26 and
standards (Figs. 1 and 7) mounted on the base frame 1, and supporting slidable
blocks 27. A rock-shaft 32 is mounted in the blocks and carries two or more
eccentrics 33 which rest against the back of the jaw 2. A hand-lever 34 is
secured to the shaft 32 and a latch thereon engages the segment rack 35. It
will be understood that by means of the lever, the eccentrics will be partially
rotated and the jaw be moved. more or less forward as may be required. The
blocks 27 are prevented from moving rearwardly by pins 36 inserted in the
frames 26, and which will break if undue pressure is occasioned between the
jaws. When this mechanism is employed the jaw 2 is supported by projections 41
which are slidable in frames 42 recessed into the base frame 1.
It is found that to make the jaw 2 adjustable by either of the methods described
is sufficient but if desired the range of adjustability may be extended by
mounting the drive-shaft 10 in bearing blocks 37 (Fig. 6) adjustable in a frame 38
by means of set-screws 39 and lock-nuts 40. This provision is especially useful
as a quick method of adjusting the jaws when the breakable bar 29 is employed;
the adjustment described in connection therewith being not so readily manipu-
lated.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
(1) In a machine for crushing ore comprising a suitable framework having
a crushing jaw mounted thereon, upwardly extending arms on said jaw, a bar
connecting said arms with a movalite crushing iaw. the combination with
th

page_text: first mentioned jaw of supports mounted on the framework and carrying movable
bearing-blocks, a shaft journalled in said blocks, eccentrics upon said shaft a
hand lever and segment rack for operating and adjusting said shaft, eccentrics,
and crushing-jaw, the breakable pins retaining said bearing-blocks in place, and
the means for slidingly supporting said crushing jaw on the framework, all
substantially as and adapted to operate as hereinbefore described.
com-
(2) In a machine for crushing ore, comprising a suitable frame-work, a
crushing jaw mounted thercon by means of a breakable bar extending across
the side frames and secured to said jaw, a bar connecting said jaw with a movable
jaw, an eccentric drive-shaft for operating said movable jaw; the
bination with said mechanism, of means for adjustably mounting said
drive-shaft, consisting of a frame supported on the machine framework and
fitted with movable bearing blocks adjustable by means of set-screws, all sub-
stantially as and for the purposes hereinbefore set forth.
(3) In a machine for crushing ore comprising a suitable frame-work, crushing
mechanism mounted thereon, and rollers rotatably mounted beneath said mech-
anism; the means for adjustable mounting said rollers and resisting undue
strain, said means consisting of a box-like frame supported by the machine
frame-work, bearing blocks slidably mounted in said frame, one pair of blocks
being retained in place by means of pins breakable by undue strain, and the
other pair of blocks adjustable by means of set-screws and lock-nuts all sub-
stantially as and adapted to operate as herein before described.
(4) In a machine for crushing ore, the combination with a fixed jaw, of a break-
able bar arranged horizontally at the base of said jaw, and an operating jaw
adjustable towards and from said fixed jaw, all substantially as hereinbefore
described.
(5) In a machine for crushing ore, the combination with the crushing jaws, of
rolls adjustably mounted beneath said jaws and having gears arranged thereon
to mesh with gears mounted on a shaft eccentrically journalled and capable of
adjustable rotation in its bearings for enabling said gear to be changed or adjusted
to suit the adjustment of said rollers, all substantially as hereinbefore described.
Dated this 14th day of September 1899.
R. RAINSFORD,
Applicant.