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Патент USA US3096818

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July 9, 1963
3,096,808
H. w. HOLSTEYN
SLAB STRAIGHTENING
Filed Jan. 16, 1961
3 Sheets-Sheet 1
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July 9, 1963
3,096,808
H. w. HOLSTEYN
SLAB STRAIGHTENING
3 Sheets-Sheet 2
Filed Jan. 16, 1961
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July 9, 1963
3,096,808
H. w. HOLSTEYN
SLAB STRAIGHTENING
Filed Jan. 16, 1961
5 Sheets-Sheet 5
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United States Patent 0 "
3 ,‘0'9 6 ,8 0‘8
Patented July 9, 1963
1
2
3,096,808
Henry W. Holsteyn, 10 End St, Johannesburg, Transvaal,
frame 10. The yoke 17 is moved up and down by means
of a piston rod 20' connected to the piston of a double
acting hydraulic jack 21. The yoke thus moves up or
down depending on which side of the jack 21 pressure
?uid is obtaining access.
SLAB STIGHTENING
Republic of South Africa
Filed Jan. 16, 1961, Ser. No. 82,919
Claims priority, application Republic of South Africa
The elevator structure is illustrated on a larger scale
in FIGURES 3 and 4 where two positions of the yoke
17 are illustrated. At each of its ends the yoke 17 has
15 Claims. (Cl. 153-48)
two hooks 22 pivotally connected to the yoke 17 by means
This invention relates to the straightening of material 10 of links 23. Each inner link 23 is pivotally connected to
a connecting rod 24 which in turn is pivotally connected
in the form of slabs such as cast slabs used as anodes in
.
Jan- 15, 1960
to a toggle 25 ‘secured to a pin 26 on the piston rod 20.
The pin 26 engages in a slot 27 on the yoke 17 so that the
yoke and the rod 20 can have lost motion one with the
in trucks in which they are vstacked vertically and suitably
spaced apart. The problem is to remove them from the 15 other.
the electrolytic re?ning of copper.
Copper slabs for use 1as anodes are generally conveyed
trucks, straighten them and replace them in the trucks.
Various solutions to the problem have been proposed but
Starting from the position shown in FIGURE 4, the
hooks 22 are in their widest position and clear of the
guides 19. As the rod 20 pulls upwardly the pin 26 ?rst
travels the length of the slot 27 and thus pulls the hooks
An object of the invention is to provide an improved 20 inwardly. When the pin 26 reaches the end of the slot 27,
the rod 26: starts to lift the yoke 17.
method and means for straightening copper slabs for use
The usual shape of a cast anode 30 has been illustrated
as anodes.
in the drawings. When the hooks 22 move inwardly they
In a method according to the invention a slab is elevated
engage under lugs 29 cast on to the anode 30, provided
with its general plane substantially vertical, held in such
elevated position, pressed to straighten it, and then lowered 25 that the anode 39 is initially in the correct position. Thus
by pulling the rod 20 upwardly the hooks move from the
back to its original position.
position shown in FIGURE 4 to the position shown in
Thus when the slabs are conveyed by truck, as described
FIGURE 3 and at the same time the anode 30 is carried
above, each truck is moved step by step for each slab
upwardly.
contained in it to be removed, straightened and replaced.
On the downstroke of the rod 20 the yoke 17 moves
Conveniently the slabs are elevated by lugs which are cast 30
down until the hooks 22 are free of the guides when the
on to them or otherwise suitable formations are provided
downward movement stops and the hooks 22 are pushed
on the slabs.
they are all too expensive or too cumbersome to perform
satisfactorily.
Apparatus according to the invention comprises a press
with its platten and bed horizontally opposed and mounted
sideways.
'
The position shown in FIGURE 3 represents the upper
for a truck to move underneath it; an elevator adapted to 35 limit of the stroke of the rod 20‘ and the position in FIG
URE 4 the lower limit.
grasp a slab in a truck, lift the slab, position it between
When an anode 30‘ is in the position shown in FIGURES
the platten and bed, lower the slab and release it in low
2 and 3, the cylinder 16 is fed with pressure ?uid for the
ered position; and means to cause the platten to operate
platten 14 to push the anode 30 against the bed 15 and
when the slab is positioned and to withdraw the platten
40 thus straighten the anode 30.
prior to lowering of the slab.
In the straightening process the lugs 29' are moved off
Preferably the invention also comprises means to move
the hooks 22 on to anvils 28 on the same level as the
the truck step-by-step under the press in step with the
hooks 22. In order to get the anode 30 back on to the
sequence of operations of the elevator and platten.
The invention is further discussed hereunder with ref~ ' hooks 22, the platten 14 is provided with hook formations
45 31 that pass over theanode 30' and contact it at the rear.
erence to the accompanying drawings, in which
Thus as the platten 14 moves back, it pulls the anode 30
FIGURE 1 is a side elevation of an anode straightening
back on to the hooks 22.
However, before the latter operation it is desirable to
FIGURE 2 is a section on the line 2—2 of FIGURE 1,
square up the lugs 29 to ?t into holders provided in elec
FIGURE V3 is a view of the elevator,
FIGURE 4 is a fragmentary view of the elevator show 50 trolytic cells. To enable the squaring up operation to
installation according to the invention,
ing the elevator in a different position to that of FIG
take place without undue strain, the platten 14 is moved
back a small distance to that the anode 39 hangs freely on
the anvils 28. Thereafter plungers 32 for squaring up the
FIGURE 5 is a fragmentary view showing details of a
horizontal faces of the lugs move down under the action
feature of the invention, and
FIGURE 6 is an enlarged fragmentary view of part of 55 of hydraulic cylinders ‘33. On one side the plunger 32 is
provided with a tongue that trues, a groove cast into the
FIGURE 2 showing certain parts in a different position.
relevant lug 29. The groove is required for making elec
The installation shown in FIGURES 1 and 2 has a sub
trical connections in the subsequent electrolytic operations.
stantial, rigid frame 101 that straddles a railway track
With the plungers 32 still in position, horizontal plung
having rails 11. Trucks 12 and 13 containing anodes to
60 ers 34 actuated by hydraulic cylinders 35 move to square
be straightened run along the rails 11.
the lugs 29 in the other dimension against the face of the
On top of the frame 10‘ an elevator mechanism and vari
-URE 3,
ous press mechanisms are mounted.
bed 15.
for the press is derived from a suitable motor and pump
on to the hooks 22. _
.
The lugs now being of a suitable shape, the plungers 32
The ?rst press mechanism is the main straightening
and 34 ‘are withdrawn and in that sequence. Thereafter
press which is hydraulically operated and which has a plat
ten 14 horizontally opposed to a bed 15. The hydraulic 65 the platten 14 is moved 1back to its starting position and
thus by means of the hook formations 31 pulls the lugs 29
cylinder of the main press is marked 16. Motive ?uid
. .
The jack 21 is then actuated to lower the yoke 17 and
assembly not relevant to the present discussion.
deposit the ‘anode 30 in the truck below. The hooks then
A hydraulic elevator is mounted with its plane of oper
ation just in front of the bed. The elevator has a yoke 70 free the lugs 22 [as shown in FIGURE 4. The truck may
now be moved until the next anode 30 is in register of the
17 guided for straight line motion by means of guide
hooks. The yoke is then lifted again for the books 22 to
rods 18 ‘and also by means of suitable guides 19 on the
accesses
~35
grab the next anode Y30 and bring it into the straightening
position. Thereafter the procedure described above is
repeated.
As ‘pointed out above in connection with the elevator,
the ‘anodes should be correctly positioned. Normally
4
rod having lost motion withthe yoke and including links
between the rod and the hooks for the rod to move the
hooks during periods of lost motion.
5. The apparatus claimed in claim 1 adapted for use on
cast anodes with lugs, including means to square up the
‘anodes are conveyed in trucks which have notches for
positioning the anodes an equal distance apart in the
lugs.
truck. Thus any system for moving the truck step by
vstep below the elevator would be suitable for use with the
ing means includes an anvil rigid with the bed, and auxil
tion made to a conventional truck is the addition of an in
tions from adjacent corners, consisting in means to move
a series of slabs step by step in series past a station with
each slab substantially in a vertical plane and the lugs pro
jecting from the top corners of the slabs; a press with its
6. The apparatus claimed in claim 5 in which the squar.
iary plungers adapted to press the lugs against the anvil
vapparatus thus far described.
10 and the bed.
'A convenient form of indexing means provided by the
7. Appamatus for straightening a slab of substantially
invention 'is illustrated in the drawings. The only altera
rectangular shape with lugs projecting in opposite direc
dexing plate 40. This plate cooperates with two notched
nails '41 and 42 which are journalled for rotation below
the truck.
Crank arms 43 are connected to the rails and
pivoted to the plunger of a double acting ram 45.
The
arms 43 rotate in unison so that when the rail 41 has a
notch engaging with ‘the plate ‘40, the notches of the rail
platten and bed horizontally opposed and positioned above
the station; an elevator adapted to» grasp the lugs of a slab
positioned at the station, lift the slab, position the slab
42 are fre‘eof the plate 40 and vice versa. FIGURE 2
between the platten and bed, lower the slab and release
shows the rails 41, 42 in one position and FIGURE 6 20 it in lowered position; and means to cause the platten to
shows them on a larger scale in the other position. One
operate when the slab is in position and to withdraw the
mail 42 is also capable of recipro-catory movement the
direction of its length by means of the hydraulic ram 46.
platten prior to lowering of the slab.
8. Apparatus for straightening a slab of substantially
'Phe-cy‘cle’of operations is as follows. The rail 41 nor
rectangular shape with lugs projecting in opposite direc
mally engages the plate while the press mechanism is oper 25 tions from adjacent corners, consisting in a press with
ating as in'BIGURE 2. When a new anode is to be
its platten and bed horizontally opposed; an elevator hav
pressed, the nails are rotated for the mail 41 to‘ disengage
the plate 40 and the rail 42 to engage the plate 40 as in
ing a lifting arm adapted to straddle a slab positioned
below the press and grasp it by its lugs, the elevator serv
ing to grasp a slab, lift the slab, position and hold the
pusher which'moves the rail 42 forward. At the end of 30 slab between the platten and bed, lower the slab and re
the forward ‘stroke the nails are rotated in the opposite
lease the slab in lowered position; and means to cause the
direction for the mail 41 to re-engage the plate 40 and
platten to operate when the slab is positioned between
the rail 42.
the platten and the bed and to withdraw the platten prior
‘The mam 45 isagain actuated to return the rail v42 to its
to lowering of the slab.
35
initial position in the axial direction.
9. In combination a frame adapted to straddle a truck
When a truck in a tnain has passed through, its plate 40
on a railway line; a press mounted on the frame with
depresses a-switch which actuates a transfer member 51,
its bed rigid with the frame and in a vertical plane and
that li?ts up and presses against the plate 40 of the next
a hydraulically actuated platten horizontally opposed
truck in a train to push the train forward the distance
to the bed; a hydraulic jack mounted above the space be
between‘ the last anode of one truck and the ?rst anode of 40 tween the platten and the bed with its piston rod adapted
another truck.
FIGURE -6.
The hydraulic
46 now actuates a
Admission of pressure ?uid to the hydraulic cylinders
may take place ‘by manual operation. In this case suit
able interlocks maybe provided to ensure actuation in the
correct sequence. It is, however, preferred that the opera
tions should-proceed on an automatically timed cycle with
suitable interlocks between the various elements. The
method and means for an automatic timing cycle in hy
to pass through the space; a yoke on the rod; means to
guide the yoke for movement in a vertical plane travers
ing the space and parallel to the end, the yoke being mov
able between an upper position in which it is clear of the
space and a lower position below the space; and hooks at
the end of the yoke adapted to grasp a slab in a truck
when the yoke is in the lower position to hold such slab
as the yoke moves under the action of the rod and to
dnaulic apparatus are well known and need no further
release the slab when the yoke returns to the lower po
elabonation. In the ease of automatic operation a sensing 50 sition.
device such as that shown at ‘50 in [FIGURE 2 is required
10. The combination claimed in claim 9 in which the
to shut off a cycle of operations when a train has passed
hooks are pivoted on the yoke and there is lost motion
through.
1 claim:
between the yoke and the rod, and including a linkage
between the rod and the hooks for the rod to move the
1. Apparatus for straightening a slab such as an anode 55 hooks during periods of lost motion.
of cast copper comprising a press with its platten and bed
11. The combination claimed in claim 9 in which the
horizontally opposed and mounted for a truck to move
underneath it; an elevator adapted to grasp a slab in a
path of movement is spaced from the bed and movement
of the platten is adapted to move a slab out of engage
truck,'litt the slab, position andhold it between the plat
ment
with the books, including an anvil for receiving lugs
60
ten and bed, ‘lower the slab and release it in lowered posi
on the slab and to support the slab during pressing and
tion; and means to cause the platten to operate when the
hook formations on the platten extending around the
slab is positioned and to withdraw the platten prior to
space, the hook formations being adapted to pull the
lowering of the slab.
slabs off the anvils into engagement with the hooks on
2. The apparatus claimed in claim 1 in combination
the return stroke of the platten.
with means tomovea truck step by step under the press 65
12. The combination claimed in claim 11 including
in step
the sequence of operations of the elevator
hydraulic presses adapted to press against the lugs to
and plratten.
square them up on the anvil.
‘3. The apparatus claimed in claim 1 in which the ele
13. In combination ‘a frame adapted to straddle a truck
vator-has a forked lifting arm adapted to straddle the slab
and provided with suitable formations to engage with 70 on a railway line; a press mounted with its bed rigid
with the frame and in a vertical plane and its platten
complemental formations on the'slab.
horizontally
opposed to the bed; a yoke guided for move
4. The elevator claimed in claim 3 in which the lifting
ment in ‘the space between the platten and the bed be
arm~consists in a yoke with hooks pivoted at each end of
tween a lower position below the space and an upper po
the yoke being the engaging formations, and including
a hydraulic ram with its piston connected to the yoke, the 75 sition above the space; hooks at the ends of the yoke ar
ranged to close inwardly to grasp an ‘article between them
3,096,808
5
6
the yoke reaches its lower position from the upper posi
vertical, holding the slab in such elevated position, press
ing it to straighten it and lowering it back to its original
position in the series, the slab being kept in the same
to the yoke with lost motion and including links between
the rod and the hooks for transmitting movement of the
References Cited in the ?le of this patent
UNITED STATES PATENTS
upon initiation of upward movement of the yoke and to
remain closed while the yoke is moving and to open when
general plane whilst being elevated, pressed and low
tion; and means to raise and lower the yoke.
14. The combination claimed in claim 13 in which 5 ered.
the means to raise and lower the yoke is a rod connected
rod from ‘the rod to the hooks during periods of lost mo
tion.
10
15. A method of straightening slabs such as anodes of
cast copper consisting in conveying the slabs in a series
one by one past a straightening station, and at the
straightening station removing each sla'b in turn from the
series by elevating it with its general plane substantially
1,889,521
2,185,381
3,051,216
Anthony et a1 _________ __ Nov. 29, 1932
Munch et al. _________ __ Jan. 2, 1940
Tomka et a1. ________ __ Aug. 28, '1962
3,739
Australia ____________ __ Aug. 27, 1931
745,003
France ______________ __ Jan. 31, 1933
FOREIGN PATENTS
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