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Патент USA US2410492

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‘ Nov. 5, 1946.
J. w. GARRow
Filed Sept. 21, 19.44‘
5 Shéets-‘Sheet 1
Nov. 5, 1946. ‘
' ,1. w. éARRow ,
' 2,410,492
Filed Sept. 21, 1944
5 Sheets-Sheet 2
JOHN "(GA/7R0 W ,
‘No‘v. 5,1946.
Filed- Sept. 21, 1944. '
5 Sheets-Sheet s
Nov. 5, 1946.
- Filed Sept. 21} 1944
s Sheets-jSheet 4
8w-lu. 1
/ s11 -.
JOHN w GA RR 0 w
Nov. 5, 1946.
_ J. w. GARROW.
Filed Sept. 21. 1944
5 Sheets-sheaf 5 _
JOHN W. GA 880 w
Patented Nov. 5’, 1946
._2,4.10,492‘ .
refs _¥ArE;Nrior-’
2,410,492 '
John_ ‘Willis
Copper Cliff, Ontario,
Canada, assignor to The International Nickel
Company, Inc., NewvYork, N. Y., a corporation 7
of Delaware
Application September 21, 1944, Serial No. 555,126 7'
In. Canada August 3, 1944
3 Claims. (Cl. 198-—_26)
charging grinding mills with ‘grinding medium,
the heavy rods.
handling of
'It is an object of the present invention to pro-_
'vide a ‘motorized device for charging grinding
and, more particularly, to a device for charging
As those skilled in the art know, the comminu
minor accidents result from'manual
The present inventionrelates to devices .ior
rods to rod mills of the “Marcy” type.
medium to rod mills.
tion of ores is carried out in mills such as haml . It is another object of the present invention to ‘
provide a device having a runwayalong which
lnel' mills, ball mills and rod mills.
individual rods are conveyed with sufdcient ve
locity to be discharged into the mill.
It is a further object of the present‘ invention
- mills consist brie?y of a hollow cylindrical body 10
to provide a means whereby the longitudinal or
disposed horizontally and provided withmeans
for rotating the cylindrical body on its horizon
endwise path of travel of the rod is controlled ' and maintained in substantially the same plane.
tal axis, and a grinding charge which consists of
as during its travel on the runway-conveyor dur
rods of suitable material, usually of steel. The
mills vary in length and diameter and, in many 15 ing discharge into the mill until the rod has com- .
The present invention relates particularly to.‘
comminuting devices of the rod mill type. Such
instances, are from 15, 18 ‘to 20 feet in length.‘
The grinding medium is charged into the mill in
pletely entered the mill.‘ .
_ ‘ Other objects and advantages will become ap
parent from the following description taken in
conjunction with the drawings in which-:
inner periphery of. the horizontal cylinder which
is the rod mill body. These rods when charged 20 . Figure 1 illustrates a side elevation er’ a ‘device
are slightly shorter in length than the interior ‘ embodying the principles of the present inven-4
‘length of the rod mill and are usually 2.5% 3
. Figs. 2 ‘and 3 are vertical sections taken at
inches in diameter..
?nest-2 and 3—-3, respectively, of Figure 1;
As might be expected, and as is well known, in
Fig. 4 depicts a section taken on line sip-d of
grinding the ore the rods are reduced in diame 25
vFig. 8 showing certain parts in detail;
ter and at intervals additional rods must be
Fig. 5 is a more detailed View of the rod select
charged into the mill in order .to keep the weight
ing means and operating control in the preferred
of the grinding medium at a predetermined op-,
the form of rods of such length as ‘to rest on the
_ timum. Heretofore, the charging of these grind
ing rods into the rod'mill has been accomplished 30 Fig. 6 is a plan view of the rod ‘feeding device
of my invention; and
generally, and in fact usually, by hand. This in
Fig. 7 is a diagrammatic side elevation of the
volves heavy manual work since each rod weighs!
about 250 pounds and is about 15 feet long. In
many orperations it is customary to charge 25
' rod feeding device of my invention and of the
rod mill showing their relative, positional dispo
rods of such dimensions and weight into each of 35
Generally stated, the machine embodying the
a series of mills at regular intervals.‘ It has been
principles of the present invention provides
found that when a charge of 25 rods is intro
means for moving single rods longitudinally‘
duced manually into a rod mill, a; crew of, nine
along a runway with sumcient velocity to be
men is required who take ?ve minutes to manu
ally charge a normal load of 25 rods and there 4.0 charged into a. rod mill. The machine prefer
ably consists of a rack to hold'the rods, a hori-l
afterrequire a rest period of 3 minutes“ In
zontal rod runway'and conveyor, a rod selector,
other words, the manual charging cycle consists
and a drive and power assembly for a v-belt con-3
of a total 01‘ 8 minutes, or a total of 72 man min- ,
veyor. The whole combination is built as apert
By means of the present device it is possible 45 able unit supported by a steel frame mounted on
to charge the same weight of grinding medium,~
swivel casters. The horizontal runway contains
i. e. 25 rods of about 250 pounds each, with a
crew of three men in’ about 4.2 minutes, ‘a total
of 12.6 man minutes. Thus, the present device
a plurality of grooved rollers in a single line
which carry a V-belt over which the rods move
. to the mill. The V-belt also serves as the driv
has several advantages, among which‘ are they 50 ing means from a motor pulley. The are of con
1. A reduction in, labor of about 80%.
2. An increase in labor e?iciency due to the
tact of the belt with the pulleymay be and gen
erally is increased by ‘the use of a snub-pulley.
Tension is maintained on'the driving belt by
this snub pulley and by means of pivoting the
3. Improved safety practice since frequent 55 mqtqr haselalthough other means known to those
- elimination of extremely heavy manual work.
skilled in theart maybe employed.
when ten- .
sion is maintained were, driving belt by pivot
mg the motor, it is desirable to provide a sup
port upon which the motor may rest in the event
the mill end of the device. Pulley 4 ensures that
the longitudinal or endwise path of travel of the
rod is controlled and maintained in substantially
the same plane as during its travel on the run
way-conveyor while being charged into the mill
that the driving belt breaks. The framework
carrying the belt-driven pulleys extends beyond
so that‘ the rods do not tend to pile up in the
the main supporting framework of the machine
mill like so many Jack straws. ‘Journaled in
beams 5 are shafts 6 upon which belt driven
and this extending framework is preferably a
grooved-pulleys ‘I and 8 are ‘mounted. Grooved
continuation, in the direction of endwise travel
of the rods, of the pulley-carrying framework. 10 pulleys 8 and ‘I are driven by V-belt II which
It is thus in substantially the same plane as the
runway conveyor and, being co-extensive with
the pulley-carrying framework, requires no verti
cal supports. It may thus be adapted to actually
project through the charging port. of the rod mill.
This extending framework carries one or more
rotatably-mounted pulleys which may be grooved
similarly to the belt-driven pulleys or they may
passes over motor pulley ID of the motor 9, to
‘and over pulley 8,‘thence to and over pulley ‘I,
‘around snub pulley 25 and completing (,itscircuit
around pulley ID. The grooved pulleys ‘I and'8 15 have their grooved‘ surfaces in two planes as‘
shown more clearly in Fig. 2 and Fig. 5, and form
a lower groove. for the V-belt in which the angle
of the sides is determined by the particular V- '
belt used in the manner well known in the art.
mounted pulley or pulleys forms an extension 20 ‘Co-extensive with this lower groove. an upper
of the runway conveyor and rotation is imparted
groove is formed having its angular sides at the
same or a different, angle to the angle of the
by the end-wise progress of ‘the conveyed rod.
A similar rotatable pulley is mounted on a brack
lower groove sides. The upper surface of the V
et' vertically above the plane of the runway con
' belt Ii, when in place, forms the base of this
veyor and so disposed that the most outwardly 25 upper groove and this upper surface 'of the V
have a plane ' smooth face.
This rotatably
disposed of the rotatably mounted pulleys in the
belt. Cooperating with the angular sides of the
extending framework acts in fulcrum arrange
ment with the bracketed pulley on the progress
upper groove, forms the horizontal rod runway
and conveyor l2. It is an important feature of
ing rod when the rod has practically completed
the present invention that the rods shall be ade
‘its endwise travel. This feature is explained in 30 quately supported while on this runway and in
' greater detail hereinafter with reference to Fig. _;
its preferred form it shall be such that the rod
‘I of the drawings.
will be in substantially tangential contact with
the angular sides of, the upper groove while rest
The rods are placed on a rod rack in any suit
able manner as, for example, by means of a >
ing on and supported by the outer surface of the
crane. vThe rack preferably is. slightly higher 35 V-belt. The angle of inclination of the sides of
V the upper groove will thus be determined by the
than the runway-conveyor and preferably in
clined towards it. Suitable means ?xed rigidly
need for obtaining this three-ppint contact be-_
at each end of an operating shaft parallel to the
tween the rod being carried and the rod runway
runway are provided to move one rod at a time
vand conveyor I2.
on to the horizontal runway. Means are pro 40 At suitable places along the upper edge of the '
beams 5, rod stops I l'areprovided to prevent
vided to stop the cross movement of the rod as
it rolls from the rack to the runway. ' Means are
‘ ' also provided to raise the mill and of the frame
offthe swivel casters and hold the unit station
ary during charging operations.
The foregoing description describes in a gen
eral way a, machine embodying the principles of
the present invention. For the purpose of giv
ing those skilled in the art a better understand
- discharge of the rods over the side of the ma
chine. A rod rack I4 is disposed in a plane slightly
higher than the top of V.-belt II so that the rods
‘ will roll on to the V-belt.. It is quite essential that
a V-belt of this type be used in order that an
instantaneous velocity shall be applied to the
, rods the instant they roll on to the' belt conveyor
surface I2. This belt also functions or serves the
ing of the invention, a more detailed description 50 purpose of reducing the wear on the grooved
of a specific embodiment of the invention will
now be given in connection with the drawings.
The machine comprises a steel frame I con
structedof suitable material which possesses suf
ficient strength together with lightness. ' Thus,
for example, the frame may be constructed of
angle iron, steel, and the like of suitable thick
ness and width to support the maximum load
to be imposed upon it and to withstand the
stresses to which it is subjected; In order to
provide a mobile device, the frame is mounted
on a suitable number of swivel casters 2.
At a
suitable vertical height a pair of horizontally
disposed beams I are provided which’ serve as
supports for grooved pulleys ‘I and 8 and pulley
8, which may‘begrooved or smooth faced, at the
mill-end of the machine. ' Grooved pulleys ‘I and
l are driven by a V-belt II, as is more fully‘ de-'
pulleys ‘I and 8 which are largely used to guide
the rods along the path into the mill.
In order that one rod at a time shall be dis
charge on to the runway-conveyor l2, a suitable
mechanism,'such as the ‘star wheels I5 mounted
' on operating shaft I6, is provided.
The star
wheels 15 are rigidly mounted‘ on the opposite ends
of shaft l6 and are controlled by a manually
operated lever II at the mill end of the rack
which turns shaft It by engaging a ratchet [8
fixed on the shaft and thereby controls the move
ment of the rods to the runway I2. A brake lever
I9, at the same location as lever l1, and also manu
ally operated. checks the rotation of the star
wheels I5 allowing one rod at a time to be fed
7 to the charging machine. The details of this
star wheel, aswell as its positional disposition in .
relation to the runway conveyor and the rod rack,
are shown in Fig. 5. It will be clearly seen in
scribed hereinafter. When the distance ‘between
the mill end of the conveyor and pulley 8 is great,‘ 70 this view that one of the rods is engaged in one
one or more additional pulley or pulleys 2‘I, ro
of the selector notches 28 of the star wheel i5
and that a selector notch 30 on approximately
tatably mounted and driven‘ only by passage of
the rod thereover, may be installed between pul‘- _ the opposite side of the star wheel is engaged
leys 3 and 8 as shown in Fig. 'I. A depressing
by the semicircular dog‘on brake lever Hi. It will
also be apparent that counter-clockwise rota
pulley I is provided at a suitable distance from
tion ‘of the star wheel-through approximately 72° - '
will remove the selected rod vertically out‘of the
‘ path of gravitational ?ow and will discharge it,
as shown at 29, onto the runway-conveyor 12.
By the same rotation the following selector notch
will select the following rod and, on the opposite
side of the star wheel, the following notch will'be
engaged by the dog on brake lever 19. ‘ It will be‘
apparent that the star wheel, in addition to func
that movement during the rotative rod discharg
ing step.
Fig. '7 shows a diagrammatic side elevation of
the machine of the present invention in its rela
tion to the rod mill being charged with rods. In
this view, one of the rods 3| has left the driven
portion or the runway-conveyor l2 and is sup
. ported in approximately the same plane of ‘travel
- by the rotatably mounted pulleys 3 and 4 carried
tioning as a. rod selector means, also serves to 10 by the extending framework. It will be apparent
from this view and from the view shown in Figure
positively arrest the gravitational flow of the rods
1 that this extending framework comprises an
on the rod rack it while one of said rods is in
extension of the horizontally disposed, beams 5.
selected position and to interrupt that ?ow ‘during
As has been stated earlier, however, this frame
the rotative discharging step. In the view of the
star wheel shown in Fig. -2, the rotation of the 15 work is not necessarily horizontal, but may be in
clined towards the rod mill ~26. The pulley 4 is
star wheel has been interrupted at the point of
_ highest vertical movement of the selected rod.
in the same vertical plane as pulley 3 and, as in
the view shown in Fig. '7, prevents the rod from
toppling endwise into the rod mill, the pulley 3
of the rotation of the star wheel in a clockwise
'direction will discharge the selected rod onto the 20 serving in fulcrum arrangement against the over
hanging weight of the rod, Pulley 21 is shown
runway-conveyor i2 and that a new rod will be
supported on the extending framework and dis
selected from the rod rack M. While the pre
posed between pulley 3 and driven pulley 8. This
ferred embodiment of the present invention con
pulley 21, with pulley 3, serves as a continuation
templates the removal of the selected rod from
the selective position and the discharging of it 25 of the runway-conveyor. ' When the size or
weight of the rod being handled, or when the
onto the run-way conveyor in one, uninterrupted
extending framework is of considerable length,
rotational step, it is apparentfrom the view shown
additional rotatably mounted pulleys may be in
in Fig. 2 that the insertion of an intermediate
stalled in this ccntiniation of the runway
step between the step of selecting and discharg
conveyor. The rod'mill as‘ shown in this view
ing would not constitute a departure from the
principles of the present invention. A jack han- ' has been partly broken away in order to show
the rod in the position described.
die 201connected to a shaft 2! by links 22 operates
It will bewseen in this view that a continuation
' cams 23 and jack legs 24 to raise the mill end of
Although the present' invention has been de
scribed in conjunction with a speci?c embodi
35 ment thereof, those skilled in the art will under
stationary during charging operations.
stand that variations and modi?cations thereof
In charging a rod mill, the ‘machine is moved
may bemade. Such variations and modi?cations
into position and the jacks lowered by means of
are to be considered within the purview of the
. the jack handle 28. Rods to be charged are placed"
speci?cation and the scope, of ‘the appended
by a crane on the rack. The rods lie longi
tudinally on the rack and, because of the side 40
I claim:
slope, move in turn across the rack and enter
1. In a machine for feeding cylindrical rods of
notches on the star wheel rod-selecting means
substantial length longitudinally into a machine
in the manner described heretofore. The next
of the rod mill type, the combination of a roller
partial turn of the. star wheel moves this rod ver
rack having a rod-supporting means of sufficient
tically out of the path ‘of lateral gravitational
lateral inclination to impart lateral rolling move
,movement of the rods and discharges the rod
ment to a plurality of rods supported thereon, a
selected onto the runway conveyor. This will be
- runway-conveyor disposed transversely of said
apparent from the arrangement shown in Figs.
the frame on the swivel casters and hold the unit
5. and 6 of the drawings. The rod is guided into ,
the groove of the rollers by angle stops 83. The
V-belt H with grooved pulleys ‘I and 8 acts as a .
runway-conveyor and the rod is conveyed along
the runway with su?icientvelocity to be dis
charged into the mill. The driving speed of the
‘J-belt or other carrying medium may be varied
to deliver rods into the mill door opening at any
' desired speed. The runway i2 comprising pulleys
‘i and 8 and belt surface H is not necessarily
horizontal, but may be inclined so that the rods
can-be discharged at locations higher or lower
than the feed position of the rods into the grooved
Fig. 6 is a plan view of the machine showing
rod-supporting means beyond and slightly below
the lower extremity of inclination of said rod
supporting means, vertical stop means beyond but -
closely adjacent said runway-conveyor whereby
lateral movement of said rods beyond said con-_
veyor is prevented, and rod-transfer means pro
jecting upwardly into the path of said rolling
‘ movement intermediate said supporting means
and said runway~conveyor whereby said rolling
movement is normally arrested, said rod-transfer
means comprising a shaft rotatably mounted
parallel to said rods, a plurality of substantially
circular members rigidly mounted at substantially
opposite ends of said shaft and within said path,
said members having a plurality of notched inden
tatlons at spaced intervals in the peripheries
the relative position of the plurality of rods on the‘
rod rack, one ofthe rods that has been selected
out of the path of lateral gravitational movement
thereof whereby the lowermost rod on said rod
supporting means is engaged in an aligned pair
of the plurality of rods and one of the ‘rods in its
initial position on the runway-conveyor.' It will
be noted from the view shown in this figure of
in the direction of said path is removed upwardly
out of ‘said path and is discharged onto said
runway-conveyor, said runway-conveyor consist
ing of a supporting framework extending across
said path transversely of said rod-supporting,
the drawings and from’the foregoing description
of Fig. 5 and Fig. 2 that the star wheel selecting
means i5 serves to positively arrest the lateral
movement of the rods on the rod rack while one
of said rods is in selected position and to interrupt
of said indentations and on rotation of said shaft ~
means and therebeyond on one side thereof to-- -
ward said mill, a ‘pair of pulleys and. at least a
third pulley carried by said framework and
adapted for in-line rotation, said pair of pulleys
being disposed at approximately‘ the opposite
engaging means between successive discharging
steps, said runway-conveyor consisting of a sup
sides of said rod-supporting means, a_ V-belt
‘porting framework extending outwardly beyond
driving said pair of pulleys and presenting a con
said rack and to‘the charging port of said mill, a '
,veyor surface moving endwise to said lateral U! pair of grooved pulleys carried by said framework
movement and towards said mill at a substantially
and adapted for rotation directionally length
greater rate of linear movement than the rate of
wise thereof, a V-belt driving said pair of pulleys
lateral movement whereby, through a high de
and presenting a conveyor surface moving at a.
gree of frictional engagement, immediate and
substantial rate of linear movement toward said
positive longitudinal movement is imparted to 10 mill whereby said discharged rod is projected
said discharged rod, means adapted for locking
along said runway-conveyor, a third grooved pul
engagement'with at least one of the notched in
ley rotatably carried on said framework adapted
dentations in said circular members between suc
to carry said projected rod during the latter
cessive discharging steps, means cooperating with
stages of said projection, and a rotatable mem
said third pulley for guiding said discharged rod
ber above said third pulley cooperating therewith
throughout the latter part of said longitudinal
to maintain said projected rod in substantially the
movement and means for retaining said rack at
plane of original projection during said latter
rest during said steps.
' i
2. In a machine for projecting cylindrical rods
3. In a machine for projecting cylindrical rods
of substantial length longitudinally through a 20 of substantial length longitudinally through a
charging port into a machine of the rod mill type,
charging port into a machine of the rod mill type,
the combination of a rack having a rod-support
the combination of a rack having a rod-support
ing means of sufficient lateral inclination to im
ing means of su?icient lateral inclination to im
part lateral rolling movement to a plurality of
part lateral rolling movement to a plurality of
rods supported thereon, rod-transfer means dis
rods supported thereon, ‘a runway-conveyor dis
posed transversely of said rod-supporting means
posed transversely of said rod-supporting means‘
at the lower extremity of inclination thereof, said
at the lower extremity of inclination thereof, said
rod-transfer means consisting of a rotatably
runway-conveyor consisting of a suporting frame
mounted shaft parallel to said rods, at least a
work integral with said rack and extending lat
pair of substantially circular members rigidly se
erally therebeyond to said port, a pair of grooved
cured‘ in spaced-apart relationship to said shaft
pulleys rotatively supported on said framework
and projecting upwardly into the path of lateral
and adapted for rotation directionally lengthwise
movement of said rods whereby said movement
thereof, a V-belt driving said pair of pulleys and
is normally arrested, a plurality of aligned rod
‘presenting a conveyor surface moving at a sub
engaging means peripherally disposed in said cir
stantial rate of linear movement toward said
cular members wherein the lowermost of said rods
mill, rotative rod-transfer means intermediate _
is positively engaged with said arresting of move—
said rod-supporting means and said runway
ment, means for rotating said shaft whereby said
conveyor adapted to remove said rods individually
engaged rod is moved upwardly out of said path
from said rod-supporting means and to rotatively
and the succeeding rod is engaged in successive 40 transfer said removed rods to said conveyor sur
rod-engaging means, a runway-conveyor dis
face whereby projectional lengthwise movement
posed transversely of said rod-supporting means
is imparted to said transferred rods, vertical stop‘
onto which‘said ?rst engaged rod is discharged
means adjacent said runway-conveyor adapted to on further rotation of said shaft, vertical stop
positively prevent lateral movement of said trans
means adjacent said runway-conveyor on the side
ferred rods beyond said runway-conveyor subse
opposite to that of said rod-transfer means
quent to said transfer,_and means adapted for
whereby further lateral movement of said dis
locking engagement with saidrotativertransfer
charged rod is positively arrested, and means
means between successive rotative transfer steps.
adapted for locking engagement with said rod
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