Improvement in Tube Rolling Mill.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvement in Tube Rolling Mill.
A communication from abroad by BENJAMIN BUTTERWORTH, Lawyer, of
Johnston Building, S.W., cor. 5th and Walnut Streets, Cincinnati, Hamilton
County, Ohio, United States of America, and WILLIAM HECKERT, Manu-
facturer, of East Lawn, Findlay, Hancock County, Ohio, United States of
America.
1, WILLIAM LLOYD WISE of No. 46 Lincoln's Inn Fields, in the County of
London, Consulting Engineer and Chartered Patent Agent, 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 :-
This invention relates to improvements in machinery designed to be used in the
manufacture of seamless or other tubes, pipes, columus, boiler-shells, flues or other
tubular cylindrical articles made of metal; and the object is to simplify the con-
struction and increase the efficiency of the machinery and appliances for rolling
such tubular structures.
Heretofore tubes, pipes and other hollow cylindrical articles have been made by
casting and rolling the hollow ingot or pile by successive passes of the hented
ingot through a train of rolls, or by reciprocating passes through a mill over double
mandrels. But in using mechanism of the usual construction it becomes necessary
to straighten and polish the article after it is removed from the mill; and to avoid
this and other objections improved appliances are provided whereby the ingot, pile
or billet, is fed or drawn between the reducing rolls by the action of the rolls them-
selves, assisted by pushers and pullers which also hold the stock in line, whereby
the article which is being reduced remains neutral, or without rotation, during the
operation, and being held in perfect alignment by the pushers (which also act
alternately as pullers, and which are placed one at either side of the mill, or in
front and in rear of the reducing rolls) may be cooled and polished while in the
mill, thereby dispensing with the subsequent straightening operation now required.
The invention will first be described in connection with the accompanying
drawings, and then particularly pointed out in the claims at the end of this
description.
Referring to the drawings, in which like letters of reference are used to designate
like parts of the machine :-
Figure 1, represents a side elevation of a universal tube mill embodying the
invention;
Figure 2 is a side elevation, partly in section, showing the rotating head which
carries the exterior reducing rolls, and illustrating the relative arrangement of the
exterior and interior rolls; these parts being indicated at II, in Figure 1 ;
Figure 3, is a sectional side elevation of the pusher, indicated at III in
Figure 1;
-
Figure 4, is a side elevation of the head-stock which supports the rear end of
the arbor on which the interior reducing rolls are mounted and rotates said
arbor; and
Figure 5, is an end elevation of the same; these parts being indicated at IV in
Figure 1;
Figure 6, is an end elevation of the pusher at the front of the mill, indicated
at VI in Figure 1 ;
Figure 7 is a sectional side elevation on an enlarged scale; and
Figure 8, is a similar plan of the expanding head or maudrel which supports the
interior reducing rolls;

page_text: :
:
Figure 9, is a sectional view of the rotating head and connections, illustrating
the arrangement and operation of the interior and exterior reducing rolls;
Figure 10, is a detail sectional view of the tapering feed mechanism for the
exterior rolls;
Figure 11, is a partial side elevation of the end portion of an arbor adapted to
be used for standard sizes of tubing ;
Figure 12, is a cross section on the line 12-12 of Figure 11;
Figure 13, is a detail showing the free end of the arbor tapered, for making odd
small sizes of tubing without using interior rolls by bringing any point or desired
diameter in line with the exterior rolls, so as to enlarge or diminish the diameter of 1
the stock ;
•
Figure 14, is a sectional view of the head-stock and operating mechanism
I connected therewith ;
Figure 15, is a detail; and
Figure 16, is a detailed section of the front pusher.
Referring particularly to the drawings,
Figure 1 represents the complete mill with all the operative parts properly
assembled for action the bed-frame being partly broken away so as to show the
screw-feed shafts and rack for actuating the pushers and head-stock which supports
the rear end and gives rotation to the arbor on which the interior rolls are:
mounted.
A, A', are the pushers. These pushers are arranged one at the front and the
other at the rear of the reducing rolls and are adapted to hold the ends of the
stock or tube which is being rolled in proper position as it passes between the rolls,
as shown in Figure 1; the reduced end of the stock being shown in section in said
figure. The pushers are connected to oppositely revolving screw-feed shafts A³, A³,
which are driven by pinions E², E³, on the ends of shafts A2, A³, respectively,
engaging suitable gearing connecting with the drive wheels of the engine; said
pushers being adapted to move in unison back and forth so that they alternately
operate as pullers one serving to push the stock and the other to pull it during
each pass. The front pusher A', aids in feeding the stock to the rolls, and is pro-
vided with an extra pair of jaws which form a bearing for the free end of the arbor
during the first pass of the stock into the mill and part of the way on the return
pass, or until the extension of pipe carries it back from the end of the arbor. The
rear pusher A grasps the front end of the stock or pipe as it leaves the mill, pulling
and holding the work in line. When the mill is reversed, the first mentioned
pusher A¹, becomes the puller, and the stock is again returned through the rolls as
will hereinafter more fully appear.
Each pusher is provided with a suitable chuck which is adapted to grasp the end
of the stock or pipe which is being reduced, and they are mounted in suitable
guide-ways upon the bed-frame of the machine so as to slide back and forth thereon
in said ways.
These pushers may be geared to the screw-feed shafts in any suitable
manner, but preferably mechanism is provided by which the pushers are given a
longitudinal motion, which may be regulated to conform to the speed of the stock.
To accomplish this a worm-wheel a, may be fixed on a transverse shaft a', journaled
in bearings secured to the depending portion of the frame or carriage of the
pushers A, A', as shown more clearly in Figures 3 and 6, and at either side of the
worm-wheel and fixed on the same shaft may be placed band-wheels or pulleys a²,
about which is passed a friction band or bands a³, one end of which is secured to a
lug at, or to a fixed part of the pusher frame or carriage, and the other end to an
eccentric shaft a', which may be provided at each end with a hand lever a', whereby
the band brake may be applied so as to cause the pusher to move when the worm-
wheel is rotated, or slackened to permit the worm-wheel to rotate while the pusher
remains stationary. By this means a constant pull or push upon the stock is
insured irrespective of the speed at which the stock or pipe is moving; the band
brake being adapted to slip to enable the pusher to move in harmony with the

page_text: stock, so that the speed of the pusher will at all times conform to the speed of the
stock.
B, B, Figure 6, represent the extra pair of jaws connected to the front pusher A¹,
so as to form a bearing for the free end of the mandrel or arbor which supports the
interior reducing rolls. The jaws B, B, are pivoted at their upper ends, (as
indicated by dotted lines in Figure 6, and in detail in Figure 16,) on a stud or bolt b
which is arranged slightly above the axial support of a cam-slotted disk B¹, by
which the lower ends of the jaws may be spread apart or brought together when it
is desired to cause said jaws to release or embrace the arbor. The disk B¹ is
provided with two reversely inclined curved or cam-slots b, b, which are adapted to
receive pins b', ', projecting. from the jaws below the pivotal support thereof
through the respective slots, so that when the disk is given a partial rotation the
lower ends of the jaws will be separated to release or receive the mandrel. A
partial rotation of the disk in the opposite direction will cause the jaws to embrace
the mandrel and hold the same in proper position.
B designates a lever which is secured to the disk B¹, for the purpose of opening
and closing the jaws, the pivot of the lever being coincident with the pivotal center
of the disk. The sliding jaws of the chuck with which each pusher is provided may
be connected in any proper manner with a spiral groove or worm upon the face of
a rotating disk C, by which said jaws may be moved in or out of engagement with
the end of the stock or tube to be rolled; the disk C being provided with a toothed
periphery which engages a worm D, fixed on a shaft D', which is provided with a
hand wheel d, at each end thereof, as shown more clearly in Figure 6, whereby,
the disk may be rotated for the purpose of expanding and contracting the jaws at
will.
E, designates the rotating head which supports the exterior reducing rolls e,
and
imparts motion from the engine to the. screw-feed shafts A², A³, and connected
pusher-actuating mechanism. The rotating head E is provided with a peripherally
toothed gear wheel E which is fitted upon a circular projection or hub of a
stationary frame E', to which it is secured by a circular key e, which may be
sprung into coincident grooves formed in the interior and exterior contacting
surfaces of the gear and hub, respectively. The teeth of the gear E³ engage the
pinion E on one end of the screw-feed shaft A', so that motion will be imparted
from the rotating head to said shaft and thence to the screw-feed shaft A', by
means of suitable gearing connecting the adjacent ends of the two shafts, as indicated
in dotted lines in Figure 2. The exterior rolls e are mounted spirally on the inner
ends of the movable carriers ³, of the rotating head E, which receives motion from
a suitable chain of gearing connecting with gear wheels or pinions H, on the ends
of the crank shafts I, of compound reversible engines, as indicated in Figures 1, 2
and 9; the link motion or reversing mechanism of both engines- being connected
together but not shown in the drawings. 12, 13, denote fly-wheels on the engine
shafts I.
F, denotes the expanding head or mandrel which supports the interior reducing
rolls f, and G, denotes the arbor on which said expanding head F is fixed. The
interior and exterior reducing rolls are preferably arranged at an angle to the
longitudinal axis of the machine or arbor G, and rotate in opposite directions, so as
to cause the stock which is being rolled to remain neutral or without rotation, while
being drawn longitudinally by the spiral pitch of the rolls, aided by the pushers.
The arbor G is supported at its rear end by the head-stock M, (Figures 4, 5 and 14)
and extends forward through the exterior reducing rolls, and its front end rests in
the bearing provided by the pivoted jaws 'B, B, of the pusher A.
The head-stock is mounted in suitable guide-ways upon the bed-frame and adapted
to be given an intermittent longitudinal movement thereon, for the purpose of
introducing and withdrawing the arbor from the exterior rolls or mill, and to permit
the introduction of the ingot to be rolled. To accomplish this adjustment of the
head-stock a worm-wheel N, fitted so as to revolve freely on the smooth portion of
the screw-shaft A³, at the rear of the mill, engages a rack N' which is fixed to the

page_text: bed-frame so that when. the worm-wheel is caused to rotate with the shaft the head-
stock will be moved back or forward according to the direction of rotation of the
shaft. A pinion N2 is also fitted on said shaft A', by means of a spline or key
fitting a longitudinal groove in the shaft, and on the projecting hub of this pinion,
adjacent to the worm-wheel is fitted, by spline and groove connection, a clutch n
(Figure 14, and as shown in dotted lines in Figure 4) the teeth of which are adapted
to engage the teeth at the side of the worm-wheel. This clutch is connected to an
operating lever n' by which the clutch may be thrown into or out of engagement
with the worm-wheel. The lever n' is provided with a roller n*, which is adapted
to run up onto an inclined stop n³, as it approaches the end of its movement, so as
to automatically disengage the clutch whereupon the head-stock will be held in a
stationary position by means of the worm-wheel which remains engaged, with the
rack. The pinion N engages a gear-wheel N fixed on the arbor G, which is
supported in suitable bearings upon standards N', N, of the head-stock frame or
carriage, so that the revolutions of the shaft A³, will impart a rotary movement. to
said arbor.
g, designates a rod which is let into the arbor G, by means of a groove extending
longitudinally from the rear end of the arbor to the expanding head or mandrel F,
to which latter said rod is connected by a rack and screw connection as hereinafter
described.
O designates a combined hand-wheel and index-plate which may be secured upon
the arbor G, at the rear end thereof, by means of a collar and set screw, as shown
clearly in Figures 4 and 14. This hand-wheel is toothed internally as shown at o³,
Figure 15, and engages a small pinion o, which is fitted upon the rear end of the
rod g, and has a spline o', lying in a groove in said rod, so that when said hand-
wheel is rotated the rod g will also be rotated in the same direction. The rod
9 is
adapted to slide back and forth in the groove of the arbor and through the
pinion o, but is locked against independent rotary movement by said pinion and
hand-wheel.
P designates a collar which is sleeved on the arbor G, between the bearings
which support the arbor on the head-stock, and is secured to the rod 9, in such
manner, that the rod may rotate when actuated by the hand-wheel and pinion, but
is prevented from moving longitudinally independent of the collar.
P designates a bell-crank lever which has two arms p, p', and is provided with
an operating lever P for actuating the bell-crank. The arm p' of the bell-crank
is held in frictional engagement with the collar P, by means of a friction roller
secured upon the end of the arm and engaging a groove p³, in the collar. The
arm P of the bell-crank is provided with a friction roller p for a purpose to be
described. The lever P' may be provided with a suitable spring catch P* which
engages a rack P' for the purpose of locking the lever in any desired position.
The rod is screw threaded a portion of its length, at the forward end thereof, as
shown in Figure 8, and this screw threaded portion engages a rack g¹ (Figure 7)
secured to the hub of the expanding mandrel F. This mandrel is constructed as
follows:-
F, F, designate collars, which may be secured upon the arbor G by means of
set screws and which are provided with four (inore or less) inwardly projecting
lugs or arms F', which overlap the ends of sliding hub F which supports the
interior reducing rolls f. These rolls have their bearings in suitable boxes f',
which rest upon inclined ways f³, formed in the periphery of the hub F³, so that
when said hub is slid longitudinally the rolls will be moved in or out, for the
purpose of expanding or contracting the head. The boxes or bearings fare
confined in the inclined ways between the arms F of the collars F', so that
longitudinal movement of the rolls is prevented. By this means, when the rod 9 is
rotated the hub F will be moved slowly forward or back within certain limits, the
projecting portion F* thereof alternately entering the spaces or recesses between
the lugs F of the collars, while the rollers f are held against endwise movement
between the arms of the collars, but moved in or out in a vertical plane, whereby

page_text: the mandrel may be expanded or contracted by operating the hand-wheel O, and:
the desired adjustment may be indicated on the hand-wheel index-plate.
As thus far described the machine is adapted for rolling parallel tubing, or tubing-
having a uniform diameter throughout. The operation is as follows:-
The stock or tube to be rolled is supported between the pushers whose chucks:
grasp the ends of the stock so that at each pass it is both pulled and pushed through.
the reducing rolls; each pusher being adapted to serve alternately as a puller..
The spiral pitch of the rolls also has the effect of drawing the stock longitudinally
between the rolls, and as the exterior and interior rolls rotate in opposite directions,.
the tendency of the stock is to remain neutral, or without rotation, so that a
uniform reduction may be effected; the pushers being also of advantage in
counteracting any residual tendency of the stock to rotate, by grasping and holding
it in line as it is drawn through or between the oppositely rotating rolls. The
interior rolls of the arbor or of the expanding mandrel are arranged in the same.
vertical plane with the exterior rolls of the rotating head, as shown in Figure 2..
The angle at which the rolls are set in either case relative to the axis of the arbor
will determine the pitch or feed of the work through the mill. Usually two passes
of the stock, that is, in and out, will complete the work, but any number of rolls
may be given, and the stock may be cooled and polished while it is held in line
between the pushers, thereby avoiding the necessity of using straightening devices
subsequent to the rolling process according to the present practice in rolling stock..
The reversal of the engines reverses the movement of the pushers, stock, and all
parts of the machine, and the engines may of course be reversed so as to cause the
stock to move back and forth as often as may be desired, thus reducing the same-
at each pass until the desired reduction is accomplished.
When it is desired to roll the interior of the stock to conform to any desired.
pattern the lever P is released from the rack P³ and allowed a free movement,.
and the desired pattern, which is given a longitudinal motion with the stock, is
caused to act on the roller p³ of the bell-crank lever P', which by means of the
described connection with the rod g, will slide said rod forward or back and
automatically expand or contract the interior rolls so as to roll the stock to
correspond to the shape of the pattern on which the roller rests. When
parallel tubing is being rolled, the handle of the lever P2 is locked at the point.
indicating the desired interior diameter of the tube on the index wheel, but when
the mill is reversed the interior diameter of the rolls may be instantly changed by
operating said hand-lever, so as to increase or diminish the interior diameter of the
pipe at each pass.
In order to give a tapering action, when desired to the exterior reducing rolls a.
nest or double conical series of gears is provided, as shown in detail in Figure 10,.
and partly in side elevation in Figure 1, one series of gears being loosely arranged
on the end of the engine shaft I, so as to impart motion to the adjusting disk and
movable carriers of the rotating head E, for the purpose of enlarging or decreasing:
the size of the opening between the exterior rolls in such manner as to gradually
enlarge or reduce the stock which is being rolled, and thereby taper the tube..
The mechanism for this purpose is constructed as follows:-
I denotes the nest of loose gears, which are placed on the end of the crank
shaft I, the individual gears being marked i, i, 3, 3, and . K designates a fixed:
stud on which is placed a reversely arranged conical series or nest of solid or fixed
gears k, which may be formed integrally or secured together so as to rotate as one..
The solid nest of gears K' engage the loose nest I', so that when any one of the
loose gears is locked to the crank shaft I, and made to rotate therewith, it will
impart motion to the solid nest; the speed of rotation being increased at will by
shifting from a smaller to a larger loose gear.
L designates a gear wheel, which is also loose upon crank shaft I, and has secured.
thereto a larger loose gear wheel L', the latter being adapted to engage the
adjusting disk E', of the rotating head E, as shown at the left of Figure 9. (The
gears k, K, being omitted in the latter figure.)

page_text: The end gear or pinion k, of the solid nest K', meshes with the gear wheel L, 80
that motion may be imparted from the crank shaft through any one of the series of
loose gears to the fixed gears, and thence to the gears L, L', and adjusting disk E'.
The crank shaft I is provided with a longitudinal groove or key-way 1, in which is
fitted a movable spline or key 1, having an adjusting rod or handle, by which
the key, may be slid back and forth so as to engage any one of the series of
loose gears and cause the same to rotate with the shaft I; the series of loose gears
being provided with key-ways or grooves which register with the longitudinal
groove, in the shaft.
The sliding jaws or carriers e³ of the rotating head E, in which the exterior
rolls e, are mounted may be supported in suitable guide-ways and provided with
teeth or curved ribs e, which engage a spiral thread or groove upon the adjusting
disk E', so that when said disk is rotated the carriers will be thrown in or out
according to the direction of rotation. By these means when the head E is rotating
and the stock is being passed between the reducing rolls, the key, may be shifted
forward or back in the groove l, for the purpose of engaging the loose
gears i,,,,and, in succession; the initial movement being imparted from
either the large gear, or the small gear i, and as the key is moved in or out the
speed of the solid nest of gears may be gradually increased or diminished, so as to
correspondingly increase or diminish the speed of the adjusting disk and move the
exterior rolls in or out with a gradually decreasing or accelerated motion, for the
purpose of tapering the tube.
In Figures 11 and 12 is shown a modification of the arbor G, in which
the interior reducing rolls are let into the arbor by means of recesses or cavities of
sufficient depth to permit the rolls to project slightly beyond the periphery of the
arbor. Two sets or series of rolls are shown; the first set being fitted in the
larger portion g³ of the arbor, and designed to be used for the first pass, while
the second set or series of rolls are fitted in the reduced portion 9³, and designed to
be used for the reverse or return pass; the arbor being adapted to be drawn back
Eo as to bring the rolls of the reduced section in line with the exterior rolls, which
latter are closed for finished diameter of tube outside.
A further modification is illustrated in Figure 13, where in the free end of the
arbor is shown as being tapered, for the purpose of making odd small sizes of
tubing, without using interior rolls, which may be done by bringing any portion of
the tapered end of the arbor in line with the exterior rolls, so as to enlarge or
diminish the diameter of the stock as may be desired.
The arbor illustrated in Figures 11 and 12 is adapted to be used for standard
sizes of tubing, and the rolls therein are arranged at an angle to the central line or
axis of the arbor in a manner similar to the rolls of the expanding mandrel.
It will be understood, of course, that various modifications may be made in the
general arrangement of the machine, and in the construction of the parts thereof
without departing from the spirit of the invention, and hence the invention is not
limited to the exact construction shown and described herein.
Obviously the operating mechanism for giving a tapering action to the exterior
rolls may be arranged in different ways, and the loose gears need not necessarily be
mounted on the engine crank shaft, while other methods of locking the gears to
the shaft may be used with the same results.
A single operating lever and hand-wheel for adjusting certain parts and a single
friction pulley and brake band may also be used instead of duplicate parts, as
shown and described, but for convenience in operating the mill, and to produce the
best results the arrangement and construction shown and described is preferred.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1st A tube rolling mill comprising a rotating head supporting the exterior
reducing rolls, an oppositely rotating arbor or mandrel supporting the interior
:

page_text: reducing rolls, a pair of pushers arranged one in front and the other at the rear of
said rolls; each pusher being adapted to act alternately as a puller, means supported
by the pushers for grasping the tube or stock and holding the same in line as it is
drawn through the rolls, and mechanism for rotating said head and arbor in opposite
directions, substantially as described.
2nd-In combination with the mandrel provided with the interior reducing rolls
arranged at an angle to the axis thereof, the rotating head provided with the
exterior reducing rolls arranged at a reverse angle to the axis of said mandrel, and
mechanism for rotating said mandrel and exterior rolls in opposite directions,
substantially as described.
3rd: The combination, in a tube rolling mill, of the rotatable head supporting
the exterior reducing rolls having their axes arranged at an angle to the longitudinal
axis of the machine, the arbor provided with interior reducing rolls having their
axes arranged at an angle to the axes of the exterior rolls, and mechanism
substantially as described for rotating said head and arbor in opposite directions.
4th In combination with the exterior and interior reducing rolls, and means
for rotating the same in opposite directions, the pushers provided with chucks
having radially sliding jaws which are adapted to grasp and support the ends of
the stock at the front and in rear of the reducing rolls; each pusher being adapted
to act alternately as a puller, so as to jointly assist in moving the stock at each
passage through the rolls, by pushing and pulling in alternation, substantially as
described.
5th In a tube rolling mill, the combination with the rotatable head carrying
the exterior reducing rolls having their axes arranged at an angle to the longi-
tudinal axis of the machine, of the oppositely rotating arbor carrying the interior
reducing rolls having their axes arranged at an angle to the axes of the exterior
rolls, and mechanism for actuating the rolls, whereby the stock is adapted to remain
neutral, or without rotation, in its passage through the rolls, substantially as
described.
6th-In combination with a tube rolling mill, the pusher mounted on suitable
ways thereon, mechanism for impelling the pusher along said ways, and an inter-
mediate friction brake-device connecting the pusher and impelling mechanism,
whereby the pusher is yieldingly impelled and its speed made to conform to the
speed of the stock, substantially as described.
7th The combination, in a universal tube rolling mill, of the pusher and
mechanism for operating the same, comprising a driving screw shaft, a worm-wheel
engaging said shaft, a friction brake-device connecting the worm-wheel shaft with
the pusher, and a lever for applying the brake, whereby the pusher is frictionally
geared to the driving shaft and adapted to move in harmony with the movements
of the stock, substantially as described.
8th In a tube rolling mill, the combination of the rotating head having the
exterior reducing rolls adjustably mounted thereon, the arbor carrying the interior
reducing rolls, mechanism for rotating said head and arbor in opposite directions,
and mechanism connected with a movable element of the machine for gradually and
automatically adjusting the exterior rolls for the purpose of tapering the tube,
substantially as described.
-
9th: In a tube rolling mill, the combination with the rotatable head and arbor
supporting the reducing rolls, of the pushers provided with chucks for grasping and
holding the stock in line between the rolls, the pivoted jaws mounted upon the
forward pusher and forming a bearing for the arbor of the interior rolls, and means
for opening and closing said pivoted jaws, substantially as described.
10th: In a tube rolling mill, the combination with the revolving head provided
with movable carriers which support the exterior reducing rolls, of the rotatable
adjusting disk engaging said carriers, and mechanism for rotating the disk so as to
impart a radial movement to the reducing rolls; such mechanism comprising a
conical series of loose gears placed on the driving shaft, a reversely arranged
conical series of fixed gears engaging the loose gears, suitable gearing connecting

page_text: the fixed cone of gears with said rotatable disk, and means for locking any one of
the series of loose gears to the driving shaft, substantially as described.
-
11th In a tube rolling mill, the combination with the rotating head supporting
the exterior reducing rolls, of the oppositely rotating expansible mandrel supporting
the interior reducing rolls, mechanism for rotating said head and mandrel in
-opposite directions, a pattern, and intermediate mechanism whereby the interior
rolls may be automatically moved in and out so as to roll the interior of the stock
to correspond with the pattern, substantially as described.
12th In a tube rolling mill, the rotatable head provided with the radially
adjustable carriers having the exterior reducing rolls mounted spirally thereon, the
interior reducing rolls adjustably mounted on an oppositely rotatable arbor at an
angle to the exterior rolls, means for adjusting said carriers and interior rolls, and
mechanism for rotating said head and arbor in opposite directions, substantially as
described.
13th-In combination with the longitudinally grooved arbor having the interior
reducing rolls adjustably mounted thereon, the adjusting screw rod fitted in said
groove, the pinion on said rod, the internally toothed hand-wheel engaging said
pinion, and means connecting the screw rod with the adjusting mechanism of the
rolls, whereby the latter may be moved in or out by rotating said hand-wheel, sub-
stantially as described.
14th-In combination with the exterior reducing rolls mounted on a rotating
head, the interior reducing rolls adjustably mounted on an oppositely rotating
arbor, means for rotating said head and arbor in opposite directions, mechanism
..substantially as described for gradually adjusting the interior rolls, and inde-
pendently-actuated mechanism whereby said interior rolls may be instantly
adjusted, substantially as described.
15th In combination with the longitudinally grooved arbor or mandrel, the
expansible mandrel head supporting the interior reducing rolls, the sliding rod
fitting the groove of said arbor and means connecting the same with said head so as
to cause the rolls thereof to move out or in with the movements of the rod, the
collar on said arbor connected to said rod so as to slide therewith, the bell-crank
engaging said collar and provided with an actuating lever, and a suitable rack and
catch for securing the lever, whereby the interior rolls may be instantly adjusted
and secured in the desired position, substantially as described.
:
16th In a tube rolling mill, the combination with the reducing rolls, of the
pushers, the screw-shafts for actuating the pushers, means for rotating said shafts
in opposite directions, the head-stock mounted in suitable guide-ways of the
machine, the arbor having its rear end supported by said head-stock and geared
to one of said screw-shafts, the worm-wheel loose on the latter shaft, the rack
engaging said worm-wheel, the clutch adapted to lock the worm-wheel to the
shaft, and an operating lever for engaging and disengaging the worm-wheel and
clutch, whereby the head-stock may be given an intermittent longitudinal motion,
for the purpose of withdrawing the arbor from the exterior rolls, substantially as
.described.
17th-The combination, in a tube rolling mill, of the arbor or mandrel having
the expansible head thereon; said head comprising a pair of collars fixed to the
arbor and provided with inwardly projecting lugs, a sliding hub arranged between
said collars and provided with inclined guide-ways extending in the plane of the
lugs and projecting portions adapted to enter the recesses or spaces between the
lugs, rolls mounted in bearings which are confined, between opposite lugs so as to
slide in said guide-ways, and means for moving the hub longitudinally, substantially
as described.
18th The combination, in a tube rolling mill, of the arbor having the longi-
tudinal groove therein, and the expansible head fixed thereon; said head
comprising a pair of collars fixed to the arbor and provided with inwardly
projecting lugs, a sliding hub arranged between said collars and provided with
inclined guide-ways extending in the plane of the lugs and projecting portions

page_text: adapted to enter the recesses or spaces between the lugs, rolls mounted in bearings
which are confined between opposite lugs so as to slide in said guide-ways; and a
rotatable sliding rod fitted in the groove of the arbor and connected to said hub 80
as to move the same longitudinally when the rod is either rotated or moved
lengthwise, and means for rotating and sliding the rod, substantially as described.
19th-The combination, in a tube rolling mill, of the reducing rolls, the pushers
mounted on suitable ways of the machine, one in front and the other at the rear
of said rolls; each pusher being provided with means for grasping the end of the
stock, and mechanism for imparting motion to the pushers so as to cause the same
to move back and forth in the same direction along said ways in harmony with the
movements of the stock; such mechanism comprising, for each pusher, a screw-
feed shaft extending longitudinally of the machine and geared to the main driving
shaft, a transverse shaft having a worm-wheel thereon engaging the screw-feed
shaft, a band-wheel or wheels fixed on said worm-wheel shaft, and a friction brake-
band partially encircling the band-wheel having one end fixed and the other end
thereof secured to an eccentric or cam-lever, whereby the speed of the pusher
may be made to conform to the speed of the stock, substantially as described.
20th The combination, in a tube rolling mill, of the rotating head carrying
the exterior reducing rolls, the arbor carrying the interior reducing rolls, the
pusher movable along suitable ways upon the machine and provided with a support
for the free end of said arbor, and the head-stock also movable in suitable ways
along the machine and having the opposite end of the arbor journaled in bearings
thereon, together with mechanism for impelling said pusher and rotating said head
and arbor in opposite directions, and means for imparting an intermittent longi-
tudinal movement to said .head-stock, comprising a rotary driving shaft having a
pinion keyed thereon in engagement with a gear wheel fixed on said arbor, a
worm-wheel loose, on said shaft a stationary rack engaging the worm-wheel, and
a sliding clutch adapted to engage said worm-wheel and cause the same to rotate
with the shaft,-substantially as described.
21st In combination with the rotating head and arbor carrying the exterior and
interior reducing rolls, respectively, and the screw-feed shafts and gearing connected
therewith so as to rotate said head and arbor in opposite directions, the pushers
movably mounted on suitable guide-ways and provided with means for grasping the
stock, and friction gearing connecting the pushers with said screw-feed shafts,
substantially as and for the purpose set forth.
22nd-In a tube rolling mill the rotatable head provided with the radially
adjustable carriers having the exterior reducing rolls mounted thereon, the
oppositely rotating arbor carrying the interior rolls, mechanism for rotating said
head and arbor in opposite directions, and means for adjusting said carriers 30 as
to increase or decrease the opening through the rolls at will, substantially as
described.
:
23rd The combination, in a tube rolling mill, of the rotatable head having
the exterior reducing rolls adjustably supported thereon, the arbor or mandrel
provided with adjustable interior reducing rolls, mechanism for rotating said head
and arbor in opposite directions, and means for adjusting the exterior and interior
rolls so as to vary the size of the opening therethrough at will by adjusting either
or both sets of rolls, substantially as described.
Dated this 24th day of January 1893.
W. LLOYD WISE,
Per F. J. Brougham.