US1373850A

US1373850A - Rolling-mill

Info

Publication number: US1373850A
Application number: US320129A
Authority: US
Inventors: John S Worth
Original assignee: WORTH BROTHERS CORP
Current assignee: WORTH BROTHERS Corp
Priority date: 1919-08-27
Filing date: 1919-08-27
Publication date: 1921-04-05
Anticipated expiration: 1938-04-05

Description

J'. S. WORTH.

ROLLING MILL. APPLICATION FILED AUG.27, 1919.

1,873,850. Patented Apr. 5, 1921.

9 SHEETS-SHEET lflan/5 7727 55 5 ha/Z 61- g? 5 J. S. WORTH.

ROLLING MILL. APPLICATION FILED AUG-27. 1919.

1,873,850, Patented Apr. 5, 1921.

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J. S. WORTH. ROLLING MILL. APPLICATI ON FILED AUG-27. 1919.

1,873,850. Patehted Apr. 5, 1921 ETS-SHEET 4.

g. s. WORTH. ROLLING MILL.

APPLICATION FILED AUG.27, I919.

Patented Apr. 5, 1921.

' 9 SHEE TSSHEET 5.

Illi- IZIIILI.

1. s. WORTH.

ROLLING MILL.

APPLICATlON FILED AUG.27, 191-9. 1,873,850, Patented'Apr. 5; 1921.

9 SHEETS-SHEET 6.

J. S. WORTH.

ROLLING MILL.

v APPLICATION FILED AUG-27,1919.

Patentad Apr. 5, 1921.

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J. s. worm.-

noumc' MILL. v APPLICATlON FILED AUG. 27.1919.

1,373,850, Patented Apr. 5, 1921.

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1 8. WORTH.

mums mm. I APPLICATION FILED AUG- 27' 1919.

Patented Apr. 5, 1921.

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' intense;

some s. wears, or coernsvrnnn, rmm'svnvenm,

s en'on no wonrn Bdeunnee GOREOEATIQN, Us" CLAYMQNT, DELAWARE, A QQRPORATIQR' QR QELA'WEal Application filed August 27, 191% Serial its. 8243,1128.

To saw ham em concern Be it known that 1 JOHN S. -WORTH,- a

citizen of. the United tates, and a resident are two supporting rolls, one above and the other below the workingrolls, and an'intermediateroll arranged to be'shifted-to and from either of the working rolls.

in this type of mill, the working rolls can be comparatively small, yet of an 'extreme length, as ;they are supported ,-b the supporting rollsd which are of large' iameter, consequently, thi rolling mill can be used for rolling the heaviest plates, as well as comparatively thin plates, without the liability of the rolls unduly springing.

are positively driven, while the supporting rolls are usually driven by friction from their working rolls. i In some instances, the friction ,ofthe bearings overcomes. the friction of the working rolls, due to the weight of the supporting rolls, so that the supporting rolls remain stationary, or are only partially driven. This is liable to make'a defeet in the rolls, as the surface speed of the two roll should be the same.

provide means for bodily'removing the two working rolls and the intermediate roll,

One object of my invention is to provide means for holding the sup orting'rolls' in a central position between tile. housings.-

Another object of the invention is to provide means for properly hangin the carriers for the upper working an supporting rolls andto provide means for operating the intermediate roll.

till another object of the invention is'to with their carriers, from either end of the machine.

' The invention also relates tails, which will be fully described herein- While I have described my invention as applied to five-high rolling'mills, in which thetwo'working rolls are driven, the invention may be applied to. a mill in which the two supporting rolls are driven, or in which Rename-nine.

Specification of Letters Eatent. 1

to certain de- Patented in. 5, rear;

ent granted to me on the 28th vember, 1916 No.'1,206,637.'

day of o- In the accompanying drawings: I

Figure 1 isa front elevation of a 5-high e0 rolling mill embodying my improvements;

F g. 2 is an end view; Fig. 3 is a sectional elevation on Fig. 4 is an enlarged end view illustrating.

more in detail the bearings of the upper working roll and its supporting roll;

I Flg. 5 is a sectional view on the line 55,

i 4' ig.6 is a sectional elevation on the linev'o 6-6, Fig. 4;

Fig. 7 is a'sectional plan view on the line 77, Fig. 4'; Fig. 8 is an enlarged-end view showing I the bearings for the lower wor ng roll and the intermediate roll; In this type of mill the working rolls line 12- 12, Fig. 2, drawn to an enlarged 7 scale; Fig. 13 is asectional view on the line 13- -13, Fig. 12; f i Fig. 14 is a sectional View on the line 14-44, Fig. 12; v

Fig. 15. is a sectional view on the line 15-15, Fig. 12;

Fig. 16 is a detached sectional perspective vi giv of the rest bars of the upp r working r s;

Fig. 17 is a detached, sectional perspective viiiyv of the rest bars of the intermediate r0 3 i Fig. 18 is a detached, sectional perspective, view of the rest bars of the-lower work-' ing roll;

*igs. 19 and 20 are sectional views 'illustrating the spring suspension for the hooks, which carry the cradle of the uppiarworking roll; and Fig. 21 is a view illustrating a modificationoi. the spring centering'arrangement for the rolls. 7 p .1, 1- are the housings of the rolling mill,

which are mounted on suitable foundations in the ordinary manner. 2 is the lower working roll. 3 is the upper worln'ng roll. 4. is the intermediate workin roll, which is mounted so that it can be reused and lowered as in an ordinary 3-hi h mill. 5 is the lower supporting roll an 6 is the upper supporting roll. The lower working roll 2 is driven from a shaft 7 andthe upper working roll 3 is driven from a shaft 8 in the present instance. The two shafts are cou: pled to their respective rolls by flexible couplings in the ordinary manner. The intermediate roll is not driven in the present instance exceptvby a plate passing between it, and either, of the two working rolls, while the lower supporting roll is driven by friction from the lower working roll and the upper supporting roll is driven by friction from the upper working roll.

9 are boxes for the lower Working roll. 10 are boxes for the lower supporting roll. 11 are boxes for the upper Working roll and 12 are boxes for the supporting roll. 13 are the.

boxes for the intermediate roll 4. 14 are the adjusting screws located in the upper portion of theohousings. These screws can be raised and lowered by the ordinary power mechanism 15 through the gearing shown in Figs. 1 and 2, and from a motor 16 supported on the frame 17 on the upper portion of the housings. The detail construction of the mechanism for turning the screws may be modified without departing from the essential features of the invention.

I will first describe the detail construction of the bearings for the lower supporting roll, whereby a certain portion of the weight is transferred onto a hydraulically operated carrying device through a reduced portion of the spindle.

It will be noted upon referring to Figs. 12, 13, 14 and 15, that the bearings 10 of the lower supporting roll 5 receive the trunnions 18 of the roll. The trunnions must be of considerable size in order to support the roll 5 properly and its working roll while the bloom, or plate, is being rolled.

Undo? ordinary conditions, this difl'erence in diameter would cause the supporting roll to turn .in its bearings when the working roll is turned, but owing to the excessive Weight of these rolls, which were heretofore carried solely by the bearings, the supporting roll would in some instances remain stationary when its. working roll was rotating, thereby making a defect in the surface of the supporting roll. Toovercome this and to in sure the positive operation of the lowersupporting roll by its working roll, I form a re duced trunnion 19 beyond each trunnion 18 of the roll 5 and these trunnions are mounted in bearings 20 each having a socket 520 to receive the rounded end 21 of a plunger 21 adapted to a hydraulic cylinder 22. This cylinder is pivoted at 23 to a'frame 24, in the present instance, but can be held ri ldly' in position by bolts 25, if desired. By 1; is construction the roll is free to be centered b the centering device described hereafter. ach cylinder has the ordinary packing 26 and the lower portion is connected to any suitable water supply under pressure, and is so arranged that when the roller 5 is to be driven by its workingroll, the pistons 21 are elevated sufliciently to relieve the bearings 10 of all or any desired amount of pressure of the large trunnions 18, so that instead of the supporting roll 5 being carried by the bearings 10 when the material is not being rolled, it is carried by the bearings 20 through the reduced trunnions 19 so that the difference in diameter between the roll and its reduced trunnions 19 is such that the friction of the trunnions 19 in. their bearings 20 will not overcome the driving friction of the working roll. The movement is so slight that the trunnions 18 are still fitted to their bearings 10 but the trunnions are relieved from considerable of the deadweight of the two rolls. The cylinders 21 and their plungers 22 are also used to elevate the roll 5 when it is desired to remove it from the mill.

It will be noticed that the roll 5 is slightly less'in length than the distance between the bearings 10 and the housings, as illustrated in Fig. 13. In order to hold this'roll in the central position and yet to allow it to move to a limited extent longitudinally, I provide a spring device shown clearly in Figs. 12 and 13. Secured to the bearings 20 are two rods 27 which are attached to a cross-head 28. In the present instance, each rod is threaded, and nuts 27 on either side of the cross head, allow for the adjustment of the cross-head in respect to the bearings 20. This cross-head extends through a transverse slot 29 in a frame 30 carried by a U-shaped beam 31 supported on the bed plates 32, which carry the main housings 1.

33 are plungersin the frame 30 having flanges fitting in cylindrical openings 34 closed by caps 35 and between the caps and these flanges are heavy springs 36, which press upon the plungers 33 and as the cross head 28 is located between these plungers, the tendency is to hold the cross head in the central position. In the event of the roll moving longitudinall in its bearings while a plate is in the mil the springs will immediately return it to its central position as soonas the plate is out, so that the roll is normally held in the central position. n

In order to properly support the cylinder 22, I provide two beams, 24, mentioned above,

f in which are the bearings for the trunnions bdlt-s 37 and are suspended from the U tering device is only at one-end. While the shaped beam 31 by brackets 38. This makes a very substantial structure and one which can be readily dismantled in case rep'airsare necessary to the cylinder, or its arts It will be noticed that the cylinders 22 are on? each endof therolling'mill, but the cenbeams 24 are supported by the U-shaped beam 31 at one end of the mill, the beams 24 at the opposite end are not only supported by the bolts 37 but also by bolts 39 attlached to any ofthe fixed structures of the Referring now to Figs. 1, 3, 4,5 and 6,.the

upper supportingroll 6 has trunnions 40,

which are mounted in the bearings 12 in the main housings 1, and there are reduced trunnions 41 adapted to bearings 42 mounted in dependin ortions 43 of a beam ,44, which exten rom. one 'end of the mill to the other and through the two housings 1, as clearly shown in Fig. 1. 1

In order to insure the positive turning of the supporting roll 6 with its working roll 3, the trunnions are relieved entirely of I their under bearings, and'the bearing is taken'by thetrunnions 41 of small diameter; these also support this roll in case of removal of the working r0113. .On the end of the trunnions 41 is a coupling 45. 46 is a coupling block having projections adapted to the recesses in the coupling so that it will positively turn with it. lhis coupling block has a frictional surfacebearing against a cap'47, back of which isa plunger 48 in a' frame49, which is carried by rods .50, secured to projections onthe depending portion 43, as clearly shown in Fig. 5. The

plunger 48 has afiange 51located within a cylindrical opening 52 in the frame 49. Be-

- tween this flange and a cap 53 is a spring 54.

In. this instance, there are two of these spring structures, one' at each end of the L rolling mill, as clearly shown in Fig. 1, so

that the tendency of the spring is to,hold the upper supporting roll 6 in a central position, yet when the roll moves in either direction while a. plate is in the rolls, the

. springs will have a limited amount of movement,but will always return the roll to the central phsition when the plate is out. By securing the coupling 45 on the end of the trunnion 41 of the roll 6, when it is desired to drive the roll, a driven coupling can be lhe transverse beam 44 is carried'b two straps 55, which' are hung from cross eads 57 by rods 56. These cross heads are held a by plungers 58 adapted to cylinders 59 on the upper structure of the mill on the or frame 60,- which extends from one housing to the other.

These' cylinders are hydraulic cylinders and are connected to the ordinary hydraulic I mechanism so that the plungers can be raised and lowered,as desired. Consequently, the beam, with its'upper supportin roll and uper working'roll, can be raise r and lowered 1n the housing. The upper working roll 3 is suspended from the beam 44 by a series of hooked rods 61, which engage the cradle 62' in which the roll 3 ismounted The upper ends of the rods pass through the boxes 63, in whichare located springs 64 so that the upper working roll is yieldingly held against its supporting roll 6. The springs are confined to their boxes by theplate 63 held by bolts 64* so"th at the hooked rods can be readily adjusted without interfering with the tension. of the springssee. Figs. 19 and 20. The upper working roll 3 has an extension 65 on which is a disk 66 provided with extended hubs, as shown in- Fig. 6. This disk is held to the extension 65 by nuts 67. The disk is mount- I ed in a. cage 68 having trunnions 69 adapted tocrQss-heads '70, as clearly. shown in Figs. 6 and 7. The two cross-heads are connected together, as illustrated in Fig. 4; and are mountedbetween flanged plungers 71 pro- 'ecting from boxes 72 in which are springs 3, tending to force the plungers out, the

'plu'ngers being limited by their flanges as clear y shown in Fig. 7. This arrangement is at one end only of the upper working *roll3and tends to hold the working roll in the central osition. The cross-heads 7 0- are suspended y rods 74'and between a collar on these rods and the frame 7 5 to whichtheboxes 72 are secured, is a spring 76,sojthat these cross heads are yieldingly supported, insuring the in its cage.

77 are washers located between the sides i of the disk 66 and its ea e. 78 is an-annular lining surrounding the isk within'the cage. The washers and the lining may be of anysuitable anti-friction material. In thepres ent instance, the centering device is only at one end of the roll 3. The other end is proper centering of the disk 66 i grooved to receive a coupling box 79 which connects the shaft 8 with the trunnion of roll '4 -see Fig. 1.

Thecradle 62 of. the upper working roll 1-25 ribs 82 extending to apoint nearthe roll has two

side members

81, 83, which have above the center ofthe roll 3 and the upper surface of this extension is inclined and a I loose plank, or plate, 83, rests on the portion 82 and bears upon the roll. Water is supplied through pipe 84 so that the space above the lanks is in the form of a trough for holding water in order to keep the surface of the rolls cool; the plank prevents the water dripping onto a plate while being rolled.

The lower working roll has a construction similar to the upper working roll for holding the roll in a central position. This construction is illustrated clearly in Figs. 1 and 8, in which 70* are cross heads adapted to the space between the cylindrical'boxes 72*.

Instead of these boxes being supported by the beam 44, as is the upper roll, they are supported by brackets 85 rojecting from one of the housings 1. hey arev held flexibly in the space between the boxes by a lever 86 pivoted to a rod 87 attached to the bracket 85. This lever is connected to a link 88 which engages the cross heads 70 and a rod 89 is connected to the lever 86 between its pivot and the link and extends through the bracket 85. Between a collar on this rod and the bracket 85 is a coiled spring 90. The tension of this spring can be adjusted by nuts 91 so as to hold the cross head 70 yieldingly in a central position. Otherwise, the construction is similar to that for center-.

ing roll and the bearing 10 of the lower supporting roll are spring plates 96 so that the pressure for raising and lowering the roll, or the middle cylinder can be used for cradle to their respective boxes 13, I perfocradle of the working roll is yieldingly car-' ried by this chuck, and the. neck of the working roll is relieved of so much friction. The intermediate roll 4 is mounted in a cradle '97, Figs. 3, 8, 9, 10 and 17. This cradle consists of side members 98 in which are recesses 99 to .which water is sup lied through pipes 100. The two longitu inal bars 98 have extensions 101, which pass through bearings 13 for the trunnions 102 of the intermediate roll 4, and are carried at their outer ends by a cross bar 103, which is suspended by rods 104 from arms 105 on rock shafts 106 adapted to bearings 107 projecting from the housings 1. The rods 104 are adjustable, as shown in Fig. 2. On the shafts 106 are arms 108 to which are atmiddle cylinder in the present instance,

with constant pressure for balancing the roll, and the other two' with intermittent rate the extensions 101 at 114 and locate in these perforations two blocks 115' separated by a wedge 116. These blocks bear against a plate 117 which, in turn bears against the outside of the box 13. so that on adjusting the wedges 116 these bars can be firml secured to the boxes. The bars 92 o the cradle of the lower workin roll, Fig. 11, have extensions 118, whic are forked. These extensions pass on each side of the central rib 9 of the box 9. Bearing against the outside of the box 9 is a plate 119; which is attached to the extension 118 by stud bolts 120 so that on adjusting the nuts on these bolts the bars can be firmly held to the boxes. The bars 62 of the cradle of the upper working roll are held in the same manner to their boxes as the bars of the cradle of the lower working roll and need not be described in detail. Y

It will be seen by the above construction, that a mill of the 5-high, or 4-high type, in which the upper and lower rolls of the series are the supporting rolls, can be accurately made and the rolls can be properly carried so that the supporting rolls will positively turn with the working rolls, and

in which the several rolls will be automatically centered. It has been found in prac-' ately. returned to their central position. In-

5-high and 4-high rolls, where one is a supporting roll, the tendency for one or both of the rolls to creep is accentuated, but by my arrangement the lateral creeping is allowed, while rolling, but the rolls always return to their central position before an other pass is made.

Rolling mills of this type must necessa- I rily have extremely heavy trunnions to support the weight and pressure. consequently,

the trunnions are comparatively v large in diameter in comparison to the rolls so that the friction of the trunnions in their bearings is sufiicient to overcome the friction of the working roll against the supporting roll and, consequently, the supporting roll would cease to rotate and this would wear a mark in the roll which would: have to be or working roll, preventin' heating of the removed before the work could proceed, if it was of an great extent.

By providing a. journal, considerably less in diameter than the main journal of the roll and supporting the dead weight of this roll on this small journal without disturbing the fit of the main journal in the main bearing, the roll will be positively driven by its working roll. The same is the case with the upper roll, which is suspended from the overhead structure.

The cradles of the two working rolls and the intermediate roll with their guides are 'attached to the bearings of the respective rolls and on the removal of the plate 121 at the side of the housings the entire cradle and its roll can be removed from the end of the housing as one unit, so that the roll, after .bein trued, can be accurately fitted to its, bearings and guides on the outside of the mill, prior to its being inserted in os1- tion, and while duplicates thus prepare are being used, saving thereby much delay in operation of the mill.

The plates 122 hold the 'bearing blocks to the boxes, as clearly shown in Fig. 5. When it is desired to remove the upper supporting roll, it is lowered and then removed through the housings, and the lower sup porting roll is raised b the plungers 21 and then removed throng the housings.

Thou h I have illustrated a different form-o spring arrangement for centering the upper supporting roll than that shown in connection with the lower supporting roll, a similar spring construction may be used on the upper supporting roll as on the lower supporting roll.

In Fig. 21, I have shown a modification of this spring mechanism in which a single spring 36 is used with two plungers 33 1 at the opposite end of the spring, one plun-Z ger bearing directly upon the cross head, while the other plunger is connected thereto through a rod which passes through both plungers.

Though I have illustrated cylinders for carrying the lower supporting roll on itssmall trunnions and also for suspending the upper supporting roll, springs, or levers, may be substituted, if found more desirable in some instances.

M invention while particularly adapted for ve-high rolls can be used on four-high, or even on three or two-high rolls, if found desirable.

By carrying the upper supporting roll on reduced trunnions and also carrying the u per working roll on hooked bars, I can so a just these parts that considerable weight will be taken off ofthe bearings for the upearings, as the parts cane so regulated that just enough pressure can be exerted to cause the slipportmg to be turned on its worl'rin 'ro' A mill of this type is a universal mill in the sense that very thin and wide platescan be rolled to an accurate gage as well as the heaviest plates. It is essential that the parts he 'so made that there will be practically no material defect in the plates when rolled.

I claim: -1. The combination in a rolling mill, of working rolls; housings therefor; and automatic means whereby therolls are centered" roll; means for drlving the working rolls;

means for raising and lowering the intermediate roll; and automatic means whereby the working rolls are centered after the materlal has passed between the rolls.

4. The combination in a 5-high rolling mill,'of upper and lower supporting rolls; upper and lower working rolls; an intermediate roll; and automatic means whereby the supporting rolls are centered after the work has passed between the working rolls.

5. The combination in a 5-highrolling mill, of upper and lower supporting rolls; upper and lower working rolls; an intermediate roll; and automatic means whereby the upper and lower supporting rolls and the upper and lower working rolls are com tered after the material has passed between the working rolls.

6. The combination in a rolling mill, of a working roll; means for driving said roll; a supporting roll under the working roll; bearings, and trunnions on the supporting roll adapted to the bearings ;trunnions of less diameter projecting beyond the main trunnions; bearings for the reduced trunnions; and means for carrying these bearings so as to relieve the main bearings from the entire weight of the roll in order-that the sup orting roll may turn with the working rol The combination of a working roll and a supporting roll; means for driving the working roll; bearings for the working roll; main bear-in s for the supporting roll; housings in whic the bearings are mounted, the supporting roll having reduced trunnions; bearings carrying the reduced trunnions; and means forlifting the latter bearings so -that the weight of the supporting roll will be transferred from the main bearings to the bearings of smaller diameter to insure the turning of the supporting rollby the working roll.

8. The combination in a -high mill, of housings; bearings for the several rolls mounted in the housings; twosupporting I rolls; two working rolls and an intermediate roll; an intermediate roll; means for operat- 'v in the intermediate roll; and means for driving the working rolls, each supporting roll havin two trunnions at each end differing in lameter, the large trunnions being mounted in the mainbearings ofthe housings, and additional bearings'outside of'the main bearings for carrying the supporting rolls when driven by the working rolls, insuring the turning of the supporting roll with the working roll.

'10. The combination in a 5-high rolling mill, of housings; bearings in the housings;

upper and lower working rolls adapted to the bearings; a supporting roll back of each working roll andv also adapted to the bearings in the housings; an intermediate roll; means for moving the intermediate roll; means for driving the working rolls, each supporting roll having additional trunnions less in diameter than the main trunnions; hearings in which these trunnions are mounted; a cross beam carrying the upper bearings; means for supporting the beam; and hydraulic cylinders having pistons supporting the bearings carrying the trunnions of the lowersupporting-rol 11. The combination in a rolling mill, of a working roll; a supportin roll located under the working roll, said working roll having two sets of trunnions, one greater in diameter than the other; main bearings for the large trunnions; supplemental bearings for the small trunnions; a pivoted cylinder; and a lun er mounted in each cylinder and locate un er each supplemental bearing.

12. The combination of an upper working roll; an upper supporting roll; housings; bearings in the housings for the trun-' nionsof the two rolls; a beam having depending bearings, the supporting roll having trunnions less in diameter than the diameter of the main trunnions and mounted in said latter bearings; cylinders carried by ed on the plungers; and rods connecting the cross-head with the beam carrying the upper supporting roll.

13. The combination in a rolling mill, of

plungers in the cylinders for raising the supporting roll. to allow it to be driven b the working roll.

14. The combination a housing; a lower workin supporting roll mounted un er the working roll and having trunnions; bearings inthe housings adapted to thetrunnions,-said supporting rolls having reduced trunnions and bearings therefor outside of the housings; pivoted cylinders mounted on the frame of the mill and having plungers; supporting bearings for the reduced trunnions of the supporting roll; and means for centering said supporting roll.

15. The combination in a rolling mill, of housings; hearings in the housings; a working roll and a supporting roll, the working in a rolling mill, of

roll; a lower roll having trunnions mounted in their respective'bearings, the supporting rolls having reduced trunnions with bearings there for outside of the housings, the bearings having sockets; a plunger mounted under each of the last named housings and having a rounded projection adaptedto the socket;

, a cylinder to which each plunger is adapted, each cylinder being pivoted to a fixed frame;

and means for centering the supporting rolls, the pivoted cylinders allowing for the slight movement. I

16. The combination in a rolling mill, of housings; a working roll and a supporting roll back of the working roll; bearings in the housings for the two rolls, the su porting roll having additional trunnions ess in diameter than the trunnions in .the main bearings; bearings back of said reduced trunnions; a cylinder; a piston located under each of the last named housings for. taking the weight off of the main bearings so as to insure the driving of the said supporting roll; a cross head attached to one supplemental bearing; s ring mechanism acting upon the ;cross-hea a fixed frame'in which the spring mechanism ismounted; said mechanism acting to return the roll to the central position.

17. The combination in a rolling mill; of-

housings; bearings therein; a ,roll having trunnions mounted in the bearings; a cross bar connected to said rolls; a frame through i which the bar extends, said frame being fixed; a spring on each side ofthe cross bar and located in the frame; (plungers hearing against the cross bar an tact therewith by the springs so as to return the roll to its central position;

held in conhousings; bearings for the housings; a roll havin trunnions mounted in the bearings; a .cro'ssead'attached to the roll; two setsof boxes; a spring in each box,'the boxes being separated so as to allow the cross head to pass between them; lungers in the boxes;

the springs forcing t e plungersagainst the cross-head and acting to center the working roll in the housings.

19. The combination in a rolling mill, of housings; bearings in the housings; a roll having trunnion's mounted in the bearings, said roll having extensions at one end; a disk secured to the extensions; a cage in which the disk is mounted; a cross head piv otally mounted on the cage; and springs on both sides or the cross-head acting to center the cross-head and the roll."

20; The combination of housings; bearings therein; a roll having trunnions mount-,

ed in the bearings; an extension on one end of the roll; a disk having hubs mounted on the extension; a cage in which the disk is free to rotate; washers located between the sides of the disk and the cage; an annular lining surrounding the disk within the cage; a cross-head pivotally mounted on the cage having arms; spring mechanism acting upon the arms and tending to keep the roll in the central position.

21. The combination in a rolling mill, of

housings; main bearings in thehousings; a

working roll and a supporting roll having 'trunnions adapted to the bearings; the supporting roll having, a coupling; a coupling block arranged to engage the coupling so that it will positively turn with it; a cap back of the coupling; a fixed frame; a spring in the fixedirame; a plunger within the frame forced against the cap by the said spring.

22. The combination in arolling mill of housings; two longitudinalmembers spaced apart and extending from one housing to the other, boxes at the housings connecting the two longitudinal members, the severalparts forming a cradle, and a roll mounted in the cradle andhaving its trunnions in the boxes. 7

23. The combination in arollingmilhof housing-, a cradle adapted to be removed through the housing, and a roll carried by the cradle and removable with it.

24.. The combination in a rolling mill, of housings; a cradle consisting of two longi tudinal members and two boxes, said boxes being mounted in the housings; a roll having trunnions mounted in the boxes, the two longitudinalmembers of the cradle acting as guides for the material as it passes between the rolls.

v '25; The combination of a rolling mill;

housings; a cradle consisting of two longitudinal members; boxes; a roll mounted in the boxes; plates securedto the housings so that on the removal of the plates the cradle, lwitlr its roll, can be removedthinugh the v ousin s l- Y 26. he.combination in a rolling mill, of housings; :a cradle consistingof twolongij tudinal members spaced apart and extending the bearings having extensions projecting through the bearings; and means for 'secur ing the extensionsto the bearin s.

I 258, The combination'in a rolling mill, of housings; a cradle consisting of two longitudinal members and bearings; bearin 's located in the housings, the lon 'tudinal members having extensions progecting through the bearings; blocks extending through openings in the extensions, one at the blocks resting against the bearings.

29. The combination in a rolling mill; of housings; a cradle consisting of longitudinal members and bearings, said bearings being located in the housings; aroll. mounted in the bearings, the longitudinal members formin channels; and means for supplying the C1 annels with water;

30. The combination in a rolling mill, of housings; a cradle consisting oi longitudinal members and bearings, said bearings being located in the housings; a roll mount edin the bearings, the longitudinal members forming channels; means for supplying the 'channels with water, the bottom of the channels being inclined toward-the roll; and

a loose board or plate in each channel hearing against the roll and tending to close the opening between the side members of the cradle and the roll so as to allow a body of water to remain inthe channels.

' 31, The combination in a rolling mill, of

housings; a cradle consisting of two longi-:

tudinal members and two bearings, said '115 cradle being located in the housings; a roll mounted in the cradle and having truunions adapted to thebearing's, the longitudinal members acting as guides for the plate being rolled.

32. El e combination in a rolling mill, of 1 housings; two working rolls; on intermediate roll; means for driving the working v rolls; a cradle for-the intermediate roll; I

a cross bar ateach end of the intermediate 1 roll; links connecting the cross bar to thearms of the shaft; pivotal as on the shafts; cylinders mounted in the overhead its to which the pistons of the cylinders are connected and links extending from the erom heads to the arms of the shafts so that when the cylinders are operated the intermediate roll will be raised or lowered.

33. The combination in a rolling mill of housings; two working rolls; bearings mounted in the housings for said rolls; an intermediate roll; a cradle having bearings; said cradle being mounted in the housings; two rock shafts adapted to the bearin in the housings; arms on the said rock 5 sits on the outside of the housings; a cross bar supporting each end of the cradle of the intermediate shaft; links connecting the cross bars with the arms; intermediate arms on the shaft; three cylinders mounted in the overhead structure of the bearings;

ae pistons in the cylinders; a cross head to head beam.

Wa t

which the. pistons are connected; and links connecting the cross head with the intermediate arms of the shafts.

34. The combination in a rolling mill of the cradle; an overhead support for the hooks; and springs between the hooks and their supports.

35. The combination in a rolling mill of housings; upper and lower working rolls and upper and lower supporting rolls; an overhead beam carrying the upper supporting roll; means for suspending said beam from the housings; a cradle carrying the upper workin roll; and hooked rods engaging the era 1e and connected to the over JOHN s. WORTH.

upper working roll; hooked rods engaging