other Hollow Articles from Hollow Ingots.
Year: 1887

page_text: Date of Application, 6th Sept., 1887
Specification Accepted, 6th Dec., 1887
other Hollow Articles from Hollow Ingots.
Communicated from abroad by CHARLES KELLOG, of Buffalo, in the County of Erie,
and State of New York, United States of America, Engineer.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of the Agency for Foreign
Patent Solicitors 6, Lord Street, Liverpool and 6 Bank Street Manchester both in
the County of Lancaster and 323 High Holborn in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :—
These improvements, while capable of use, in part, with certain forms of what are
known as Universal Rolling Mills, or those in which a pair of vertical and a pair of
horizontal rolls are employed, are designed more especially for application to the
forms of machine illustrated in Letters Patent of Great Britain numbered 2844 of
1883, to which reference may be had.
In the construction of universal rolling mills prior to the date of the patent
aforesaid, it had been the custom to support the under roll of the horizontal pair in
fixed bearings, or in bearings which were incapable of any vertical adjustment, and
to effect the reduction of the material being operated upon by adjusting the upper
roll of such pair toward the under roll by means of screws or otherwise, one or both
of the rolls of the vertical pair being similarly adjusted toward the other, or toward
each other, as the case might be.
The under roll of the horizontal pair, being thus mounted in fixed or stationary
bearings with no means provided to raise or lower it, as a consequence, always
remained permanently at the same elevation, and the rolls or bed, by which the
material being reduced was supported and carried to, and away from, the reducing
rolls, were, or was, similarly mounted and were, or was, incapable of any adjustment
to a higher or lower elevation.
The construction and arrangement of parts as thus described, while advantageous in
rolling mills employed for rolling solid articles, such for instance, as plates, square
bars, etcetera, are incapable of use for rolling seamless tubes, pipes and other tubular
articles, in which a stationary mandrel is employed, as no provision is made therein
for maintaining each of the rolls at the same distance from the axis of the mandrel,

page_text: or from a central line passing between them, as the others, during the various
adjustments thereof necessary to the reduction of the material and the production of
the finished article.
In the Letters Patent herein before referred to, this last mentioned objection was
partially overcome by mounting both the upper and under rolls of the horizontal
pair, as well as both the rolls of the vertical pair, in adjustable bearings, and
providing each of said bearings with a screw, whereby not only could both the
vertical rolls be adjusted toward and away from the axis of the mandrel, but also both
of the horizontal rolls, as well.
This organisation of mechanism, while rendering capable the adjustment of the
rolls to maintain the rolation between the grooves therein and the axis of the mandrel,
has been found defective, principally because of the fact that each of the said screws
are independent of, and unconnected with, the others, and, in the adjustment of the
rolls, each of said rolls is adjusted by itself, apart from the others, requiring not
only much time therein, but great difficulty is experienced in moving them all at the
same distance to bring them into proper relation with respect to the mandrel.
The objects of the invention are, therefore, first, to overcome this defect and to
provide means whereby the adjustment of hoth the rolls in the vertical and horizontal
pair may be effected simultaneously and at precisely the same distance; second, to
furnish improved means for maintaining the free end of the mandrel in proper
relation to the reducing rolls, when the tube or other article being reduced is clear
from such rolls, and has been either forced upon the mandrel or withdrawn therefrom;
third, to provide means for adjusting the rolls which support and carry the material
bring reduced to, and away from, the reducing rolls to maintain them in proper
relation with respect thereto; and fourth to devise means whereby the flexure or
bending of the mandrel may be provented while the pipe or other article being rolled
is forced upon it, in the operation of rolling.
To this end, the invention consists in the mechanism whereby these results aro
accomplished, the nature and distinguishing characteristics of which will be best
understood by reference to the accompanying drawings, in which,
Figure 1, represents a side elevation of a portion of a universal rolling mill with
these improvements applied thereto, a portion of the standards or housings being
broken away to show parts beyond, and cylinders for operating the adjusting shafts
being omitted.
Figure 2, a plan view thereof with the cylinder for operating the adjusting shafts
in position.
Figure 3, a sectional elevation of a slightly modified form of mandrel, and its
arrangement with other parts with which it co-operates.
Figure 4, is a section taken on the line of figure 3 ; and
Figure 5, a detail illustration of the relation of the supporting rolls with respect to
the reducing rolls, during the operation of rolling.
In all the figures similar letters designate corresponding parts.
A, A¹ indicates standards or housings having suitable guide ways a b formed
therein for the reception and accommodation of boxes or bearings c c, d d', and
BB, CC are circumferentially grooved reducing rolls carried thereby, the former
of which are arranged upon horizontal axes, and the latter upon vertical axes, all as
shown. D D¹, E E' indicate screws by means of which the various rolls are
adjusted toward, and away from, the article being rolled, and F the stationary
mandrel over, and from, which such article is alternately forced and withdrawn
during the rolling operation. The parts as thus far described are, or may be, of the
forms illustrated in the Letters Patent above noted, and their arrangement may be
substantially the same as that shown therein.
The screws D D, E, E¹, however, while constructed and arranged in substantially
the same way as those shown in said patents, are each provided at its outer end
with a plain portion, of considerable length, from which the screw thread is omitted,
as shown at ee in figures 1 and 2. FF, G G indicate gear and sprocket wheels,
respectively, mounted upon these plain portions, and being connected to them by

page_text: means of groove and feather connection ff, in such manner as to permit of the
movement of the latter, longitudinally through the former, in effecting the adjustment
of the rolls, while at the same time compelling them, with their screws to revolve
with the gears and sprocket wheels as such devices are rotated.
The gears F F are of the ordinary spur form, and are mounted upon the plain
portions of the screws D D¹, respectively. The gears G are of the bevil form and are
mounted upon the plain portions of the screws E E', while the sprocket wheels G' are
similarly carried by the plain portions of the screws E E'. The gear wheels F F¹
are of precisely the same diameters, and mesh with spur gear H and H', respectively,
fixidly secured upon the vertical shafts I I', which are arranged in suitable
bearings g g upon opposite sides of the machine. The gears H H' are also of the same
diameters, so that, upon rotating either of said shafts, the gears F F, meshing with
the gears carried by it, will both be revolved through precisely the same angular
distance. The effect of this will be to cause the rotation, to the same extent, of the
screws upon which such gears F F are mounted, and the consequent adjustment
toward and away from the other, to precisely the same distance, of each of the boxes
or bearings c c¹, upon which such screws operate. The sprocket wheels G¹ upon the
plain portions e e of the screws E, E', are each preferably connected to, and rotated
from, the bevil gear G, located upon its respective side of the machine through the
intervention of a second sprocket wheel K, of the same diameter as the first, secured
to, and formed on, the hub of said gear, and the chain L, passing over both o
said sprocket wheels; the arrangement being such that, upon rotating the gear G, the
sprocket wheel G will be revolved through precisely the same angular distance as
said gear. Meshing with each of the bevil gears G, on opposite sides of the machine,
and of the same diameter, is a bevil gear M, which is secured to the upper end of an
incline shaft N, mounted in suitable bearings ii, bolted or otherwise secured to the
standards or housings A A¹, and carrying at its lower ond a second bevil goar O,
which meshes with a third bevil gear P, of the same diameter as itself, secured to the
vertical shaft I or 1¹.
By the means as thus described, it will be seen that, upon rotating either of the
vertical shafts I or I', the various screws, located on the same side of the machine as
such shaft will be rotated to precisely the same extent, and the bearings in connection
with which they operate, will all be adjusted simultaneously toward and away from
each other to exactly the same distance, the direction of adjustment depending upon
the direction in which said shaft is revolved. Various means may be employed for
rotating these shafts, as for instance, a hand wheel secured thereto, or other suitable
device, and the two shafts I I' may, if desired, be connected so as to revolve in unison
and cause the adjustment of all the bearings upon both sides of the machine, and with
them all the reducing rolls, simultaneously, by means of a chain and sprocket wheels,
or by a cross shaft and bevil gears. The arrangement of parts whereby the two
shafts are revolved in unison is the one adopted in practice; but, instead of rotating
said shafts by hand, it is preferred to operate them by power, and for this purpose to
the lower end of each of said shafts, a spur gear P¹ is secured, which meshes with the
rack R, extending transversely of the machine, and being connected to the end of a
piston rod S, which, with a suitable piston, is fitted to work in the steam cylinder T.
The gears Pi P₁, are of precisely the same diameter, and the rack R which meshes
with them, is of such length as to rotate them several times in being reciprocated
the length of its movement in either direction, the number of rotations of said gears
by one reciprocation of the rack, being sufficient to effect the greatest range of
adjustment of the reducing rolls that will be required in any case.
The reciprocation of the rack, as will be understood, is effected from the steam
cylinder T, through the medium of the piston rod S and the piston thereon, which
cylinder is of proper length to cause said rack to travel to its extreme limit of move-
ment in either direction; but instead of being constructed as is common with steam
cylinders generally, the ordinary steam ports and chest are omitted, and, in lieu
thereof, it is provided with induction pipes kk' and eduction pipes 111, etcetera.
The eduction pipes lletcetera, which are in practice, preferably constructed of

page_text: somewhat larger diameter than the induction pipes k k¹, are arranged at certain
distances apart, dependent upon the amount of reduction that is to be given to the
material being operated upon at each passage between the reducing rolls, and are,
with the induction pipes k k¹, provided with suitable valves m m', whereby the flow of
steam, or other elastic medium, to and from the cylinder, and the amount of movement
to be given to the rack R at any particular time, may be governed. For instance, the
piston and the rack being at the extreme limit of their movement toward the rear of
the cylinder, and the reducing rolls B B, C C', being withdrawn from each other and
from the axis of the mandrel to their greatest extent, with all the valves m m' in the
induction and eduction pipes closed, and it being desired to adjust the rolls toward
each other a certain distance, the valve of the eduction pipe corresponding to that
distance-for example the valve in eduction pipe is opened, and the steam admitted
to the cylinder through the induction pipe k, by opening the valve m therein. The
*steam thus entering the cylinder will cause the piston, the piston rod and the rack to
move forward with it, rotating the vertical shafts I, 1, by the engagement of the rack
with the gears P¹ P₁ thereon, and, through the various screws D D', E E', cause each
of the reducing rolls to approach the other through precisely the same distance.
The continued flow of steam causes the piston to move forward until it has passed
the inner end of the eduction pipe 7, when the steam will be discharged through said
pipe, and the further movement of the piston arrested. The valve in the induction
pipe k is then closed and the adjustment is completed.. If now it be desired to adjust
the reducing rolls toward each other still further, as for instance, to the distance
corresponding to the eduction pipe 1, the valve m', is opened, and the steam admitted
to the cylinder through the pipe k when the same operations will be repeated, and the
reducing rolls adjusted, as before, and so on until the piston rod has passed the last
eduction pipe next to the forward end of the cylinder. The piston is then forced back
to its starting point, carrying with it the rack and the various reducing rolls, by
closing all the valves in the eduction pipes with the exception of that in the pipe 1,
which is opened, and admitting steam into the other end of the cylinder through the
induction pipe ¹³, which can be effected by opening the valve m therein.
By this arrangement of parts as will be seen, the reducing rolls are enabled to be
adjusted by power either toward or away from each other, and, at the same time, to
maintain them in their proper relation with respect to the axis of the mandrel, and
with each other, the amount and direction of adjustment of said rolls depending, at all
times, upon the arrangement of the eduction pipes, etcetera, in the cylinder T, and
upon the order in which their valves, and those in the induction pipes k k¹, are opened
and closed.
The mandrel F, is anchored or supported at its rear end by any suitable or well
known means, it is preferable however to employ a bracket or post to which it is
secured, as being the most simple and efficient for this purpose; and, in order to
support its front or free end, and hold it in proper central relation with respect to the
grooves in the reducing rolls for entering the aperture in the article being rolled,
when said article is presented to the reducing rolls, the supporting roll V, upon which
it rests, is made use of. This supporting roll is journalled in the free end of an arm n,
which is jointed or hinged at its lower end to the stock or bar n', fitted in a suitable
holder p, in which it is vertically adjustable by means of a screw p'. The arm n,
when the mandrel is free from the article being rolled, or when such article has been
forced upon it to such a distance that its rear end has passed beyond the point where
said arm is located, is in a vertical position, with the supporting roll V resting in a
notch or depression q formed in the mandrel, it being held normally in that position
by a spring acting upon the segmentally shaped cam r' secured to its side, as shown
in figure 3.
This arm, however, while being thus held is capable of a swinging movement, either
to the right or left therefrom, as shown in figure 1, to carry it and the supporting
roll V down and away from the mandrel F, to permit of the article X² being rolled
passing on over the same, or being withdrawn therefrom; and, in the operation of
rolling, this swinging movement will be given to said arm by the forward end of the

page_text: article being rolled striking the roll V and carrying it forward with the arm until
such devices are swung down below, and out of the way of, said article, the return of
these parts to their normal position being effected, after its passage, by the spring
and cam r. The movement of the arm thus described takes place with every passage
on or off the mandrel of the article being rolled, the hinge or joint by means of which
it is connected to the stock or bar p, permitting of its movement in both directions
with equal facility.
XX, indicate the rolls by means of which the article being rolled is supported and
carried to, and away from, the reducing rolls, and X'X' stands in which they are
supported.
These rolls are preferably constructed with a circumferential groove in their faces
of circular form, and, instead of being mounted in fixed bearings, as has been the
custom heretofore, they are journalled in bearing s 8, which are capable of vertical
adjustment in suitable guide ways tt formed in, or upon, the stands X'X'.
Depending from the under side of each of these bearings is a sleeve-like portion s',
having formed axially therein a screw threaded aperture s, in which is fitted to work
the upper end of a screw rod t¹, by means of which said bearings, and the journal of
the roll carried thereby, may be adjusted. The several screw rods t¹ t¹ may be rotated
by any convenient means, it is preferable, however, to connect them in sets or
groups, those for instance on one side of the machine, as at the right of the reducing
rolls in figure 1, constituting one set, and those on the other side, or left of the
reducing rolls in said figure, making up the other-and to rotate the rods of each set
in unison independently of the others. For this purpose cach of said screw rods, is
provided at its lower end, with a bevil gear u, which meshes with a corresponding
bevil u, mounted upon the adjusting shafts vv. The bevil gears on the screw
gear
rods are all of the same size, as are also the corresponding gears on the adjusting
shafts vv.
Various means may be employed for connecting and rotating the adjusting shafts
appertaining to each set of screw rods, the mechanism adopted by my correspondent,
however, for this purpose consists of a spur gear y, mounted on each of said shafts,
and a rack Z intermeshing therewith, the said rack being arranged transversely of the
machine, and being reciprocated from the steam cylinder Y through the intermediary
of a piston, and a piston rod y'. It will thus be seen that, upon reciprocating either
of the racks, the adjusting shafts operated therefrom, will be rotated, and the
rolls of the set to which they belong will be adjusted either up or down, through the
medium of the screw rods and gears, according as the rack is reciprocated in one or
the other directions.
The steam cylinders Y Y, for operating each of the racks Z Z, are similar in all
respects to the cylinder T for adjusting the reducing rolls; and the induction
pipes, eduction pipes etcetera, and the valves y and y³ are all arranged and
operated in precisely the same manner as the like parts shown in connection therewith.
The rolls X X of either set being in their lowest position, the piston in the
cylinder withdrawn to the rear end of the latter, and it being desired to adjust said
rolls to a certain height, the valve in the eduction pipe, corresponding thereto, will be
opened as for instance and steam admitted to the cylinder through the induction
pipe z, by opening the valve y³, the piston, with its rod y', will be forced forward,
carrying with it the rack Z, which, through the gears and the adjusting shafts vt, will
revolve the screw rods t¹t', and adjust the rolls to the required position. The valve y³
will then be closed and the required adjustment is effected. If now it be desired to
adjust the rolls to a still higher altitude, the valve in the eduction pipe corresponding
to that elevation will be opened, the steam admitted through the induction pipe z as
before, and the new adjustment attained; and so on until the piston has been carried
past the last eduction pipe. The piston and the rolls X X will then be returned to
their original position, by closing the valves in all the eduction pipes, with the
exception of that in the pipe 2, which will now be opened, and admitting steam to
the other end of the cylinder through the induction pipe z¹, by opening the valve y³
therein.

page_text: The cylinders Y Y, in practice, are constructed of such length as to cause the same
range of adjustment of the rolls X X as is given to the reducing rolls B B', CC', by
the cylinder T; and, in order to provide for adjusting the former rolls with reference
to the latter, the eduction pipes in the cylinders Y Y are arranged in such relation to
the eduction pipes in the cylinder T that, upon opening the valve in any one of said
pipes, of either of the former cylinders, and admitting steam to said cylinder in rear
of the piston, the rolls X X, operated therefrom, will be adjusted to precisely the same
height as will be attained by the under roll B' of the reducing rolls, upon opening the
valve in the corresponding eduction pipe in the cylinder T, and admitting steam
similarly to that cylinder. In other words, upon adjusting the reducing rolls to any
position determined by any one of the eduction pipes in the cylinder T, the rolls X X
will be adjusted to precisely the same height as the under roll B₁ of the horizontal
pair thereof, by opening the valve in the corresponding eduction pipe in either of the
cylinders Y Y, and admitting steam to that cylinder.
The eduction pipes of these several cylinders being thus arranged, the adjustment
of the supporting rolls with respect to the reducing rolls is readily accomplished.
In rolling a tube or other article, the reducing rolls will first be withdrawn to their
utmost limit, and the supporting rolls drawn down to their lowest point, in which
position the upper surfaces of the latter will be in a line with the upper surface of the
under reducing roll B¹, this being insured at all times, when thus retracted, by
means of the set screws 1, passing through the cylinder heads and abutting against
the rear sides of the pistons. The heated ingot is then placed upon the set of
supporting rolls to the left of the reducing rolls. The reducing rolls are next adjusted
toward each other by means of the steam cylinder T, and the set of supporting rolls,
to the right of the reducing rolls, are adjusted upward by means of their cylinder,
until their upper surface is brought into line with the upper surface of the under
reducing roll B¹. The reducing rolls are then started and the heated ingot drawn in
between them and over the mandrel, the relation of the various rolls, both reducing
and supporting, at this time being best shown in figure 5. The ingot having passed
entirely through the reducing rolls, the latter are again adjusted toward each other,
the set of supporting rolls on the left of the reducing rolls is adjusted upward by
means of their steam cylinder, until their upper surfaces are on a line with the upper
surface of the under reducing roll B' and the revolution of the reducing rolls is now
reversed. The effect of this will be to withdraw the ingot from the mandrel, and
carry it back between said rolls, after which the reducing rolls will be again adjusted
and reversed, and the ingot passed through between them as before, and so on, the set
of supporting rolls toward which the ingot is carried, being always adjusted to the
same height as the under reducing roll B¹.
It is sometimes found convenient to rotate the supporting rolls positively from the
reducing rolls, and for this purpose the chain or belt 2 is employed, which passes over
૧ grooved pulley or sprocket wheel 3 on the journal of the under roll B¹, and around
a similar pulley or wheel on the journal of each of the adjusting rolls as shown at 4.
By this means, as will be seen, a positive motion is given to the supporting roll in the
same direction as is imparted to the reducing roll.
In the drawings only one supporting roll is shown in the set to the left of the
reducing rolls, and but two of such rolls in the set at the right thereof, but it is to be
understood that, in actual practice, those numbers will be increased, and each set be
made to include quite a number of such devices.
In figures 1 and 3, the devices are shown by means of which the flexure or bending
of the mandrel is prevented when the tube or other article is being forced thereon.
These devices consist of suitable guide ways 5, secured to the stands X', X¹, both
above and below the mandrel F2, and have fitted in each a stock or bar 6, to the end
of which is hinged or jointed an arm 7, carrying in its free end a roll 8. These rolls
are provided in their periphery with a groove with such a contour as to accurately fit
the surface of the mandrel against which they hear. When the mandrel is free, or
when the tube or other article has not been forced thereon sufficiently far as to arrive
opposite these rolls, the arms 7 carrying them are in a vertical position as shown at

page_text: the extreme right of figure 1, and the mandrel is held not only from vertical, but also
from lateral flexure. As soon, however, as the forward end of the tube or other article
arrives opposite any one of these rolls, it strikes the same, and through it, swings its
carrying arm back away from the mandrel sufficiently far to permit of the tube or
other article being forced thereover. The arms are then held in this position until
such tube or other article is withdrawn from the mandrel when they swing back into
a vertical position and so remain until again swung away thereby. If desired a light
flat spring 9, or, in place thereof a strap and weight, may be employed for returning
the arm to its vertical position after having been swung therefrom; and in order to
adopt these devices to mandrels of different sizes, the stocks 6 are preferably made
adjustable in guide ways 5, and set screws 10 employed for effecting their various
adjustments.
In the machine above described the mandrel F, is shown as provided with two
balls or enlargements FF, but in figures 3, & 4 the mandrel is shown pictured and
described in the patents above noted employed in lieu thereof, the same being provided
with the rolls 11, 11, for contact with the interior of the pipe or other article being
rolled, and the pipes 12 and the ducts 13 by means of which water may be conveyed
to and discharged upon said rolls to lubricate them when in operation.
From the foregoing it will be observed that a machine is produced for rolling
tubular or hollow articlos, in which the adjustment of all the reducing rolls, necessary
to the production of the finished articles, is effected simultaneously and by power;
and, in addition thereto, moans provided whereby, not only the rolls which support
and carry the article being rolled to and away from the reducing rolls, may be main-
tained in their proper relation with respect to the latter, at all times, but also whereby
the mandrel may be prevented from flexure or bending when such article is being
forced thereon, and its forward, or free, end be held in central relation with respect
to the grooves in said reducing rolls when the article being rolled is forced entirely
thereupon or removed therefrom.
While my correspondent has shown and described the best means contemplated by
him for carrying the invention into practice, he wishes it distinctly understood that
be does not limit himself strictly thereto, as it is obvious that the details thereof may
be modified in various ways, without departing from the spirit thereof.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent I declare that what I claim is:
1st. The combination with the pair of vertical and the pair of horizontal rolls of a
universal rolling mill, and devices for adjusting each of said rolls toward and away
from its fellow roll, of mechanism for connecting such adjusting devices, whereby
the adjustment of all of said rolls may be simultaneously effected, and to the same
extent, substantially as described.
2nd. The combination with the pair of vertical and the pair of horizontal rolls, and
bearings and screws for each of said rolls, of mechanism for connecting such screws,
whereby the rolls of both of said pairs may be adjusted simultaneously toward and
away from its fellow roll, substantially as described.
3rd. The combination with the pair of vertical and the pair of horizontal rolls,
the bearings and screws for each of said rolls, the housings in which such rolls,
bearings, and screws, are mounted, a shaft arranged upon each side of the housing,
and devices for connecting said screws with the shaft on their respective side of the
housing, of mechanism for rotating said shafts in unison to cause the simultaneous
adjustment of all the rolls, substantially as described.
4th. The combination with the pair of vertical and the pair of horizontal reducing
rolls, the bearings and screws for each of said rolls, the housings in which said rolls,
bearings, and screws, are mounted, a shaft arranged upon each side of the housing,
devices for connecting said screws with the shafts on their respective side of the housing,
of a cylinder provided with induction and eduction pipes, a piston and a piston rod,

page_text: a rack, gears mounted on said shafts, and meshing with such rack, and suitable valves
for the induction and eduction pipes, substantially as described.
5th. The combination with the screws D D¹, E E', the gears F, F', the shaft I
provided with the gears H, H', P, P₁, the gear G, the sprocket wheels G', K, the
chain L, and the shaft N provided with the gears MO, of the cylinder T provided
with induction pipes k k¹, eduction pipes 7, etcetera, the piston rod S, and piston
thereon, the rack R, and suitable valves for the induction and eduction pipes, sub-
stantially as described.
6th. The combination with the mandrel F2, the holder p, and stock or bar n', of the
arm n, the roll V journalled in its upper end, the segmentally shaped cam r³, and the
spring, substantially as described.
7th. The combination with the horizontal rolls of a rolling mill, and mechanism
for adjusting each of said rolls toward and away from the other, of devices for sup-
porting the article being rolled and means for rendering these devices vertically
adjustable, whereby said devices may be adjusted with relation to the under of such
horizontal rolls as it is raised or lowered. substantially as described.
8th. The combination with the pair of vertical and the pair of horizontal reducing
rolls of a universal rolling mill, and mechanism for adjusting each of the rolls of said
pairs toward and away from its fellow roll, of devices for supporting the article being
rolled and mechanism for rendering these devices vertically adjustable, whereby said
devices may be adjusted with respect to the reducing rolls as they are adjusted toward
and away from each other, substantially as described.
9th. The combination with the pair of vertical and the pair of horizontal reducing
rolls and mechanism for simultaneonsly adjusting the rolls of each of said pairs
toward and away from its fellow roll, and rolls for supporting the article being rolled,
and mechanism for vertically adjusting these latter rolls, whereby to bring them into
proper relation with respect to the reducing rolls as they are adjusted toward and
away from each other, substantially as described.
10th. The combination with the pair of vertical and the pair of horizontal reducing
rolls of a universal rolling mill, and mechanism for simultaneously adjusting the rolls
of each of said pairs toward and away from its fellow roll, of rolls for supporting the
article being rolled, stands in which these last mentioned rolls are mounted, and
mechanism for vertically adjusting said rolls whereby to bring them into proper relation
with respect to the reducing rolls as they are adjusted toward and away from each
other, substantially as described.
22
11th. The combination with the stands X X¹, the supporting rolls XX, the
bearings ss, screw rods t₁t having the gear u on each of their lower ends, and the
shafts provided with the gears u¹ u², of the cylinder Y provided with the induction
pipes zz and eduction pipes etectera, the piston rod y' and piston thereon, and
the rack Z, whereby the supporting rolls of either set may all be adjusted simul-
taneously and by power, substantially as described.
12th. The combination with the mandrel, of devices for acting against the same at
different points around its circumference, to prevent it from flexure or bending in any
direction, substantially as described.
13th. The combination with the mandrel F, and the stand X¹ having the guide-way 5
secured thereto, and the stock or bar 6, the hinged arm 7 and the wheel 8, as and
for the purposes set forth.
a
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