US1820622A - Manipulator for rolling mills - Google Patents

Description

2 Sheets-Sheet 1 AMP] f TE IIKI? Aug. 25, 1931. A. T. KELLER 1 MANI'PULATOR FOR ROLLING MILLS Filed Feb. 8. 1930 w & i

Aug. 25, 1931. A. T. KELLER MANIPULATOR FOR ROLLING MILLS I 2 Sheets-Sheet 2 Filed Feb. 8. 1930 MA M RA w :il-iH-EEE H u" Patented Aug. 25, 1931 UNITED STATES PATENT OFFICE ALBERT 'I. KELLER, 0F BETHLEHEM, PENNSYLVANIA, ASSIGNOR TO BETHLEHEM STEEL COMPANY, A CORPORATION OF PENNSYLVANIA MANIIPULATOR EOR ROLLING MILLS Application filed February 8, 1930. Serial No. 426,818.

My invention relates to rolling mill feed tables and more especially to improvements in mechanism for turning over and otherwise manipulating ingots, blooms, billets, slabs, rods and bars or the like articles of various sizes, adaptedto be used in connection with rolling mills for turning'and shifting the article in order that it may enter the successive roll passes, or between the reducing rolls 'n the required position.

Although my apparatus may be used to mechanically manipulate ingot and bars of various sections on rolling mill feed tables for mills of difierenttypes, I will for the sake of conciseness and clearness of descrip-' tion, describe and illustrate my invention in .connection with what-is known as a bloomthe bloom are reciprocated vertically either in front of one of the side guards or 1n guide ways formed therein. The side guards are adapted to be moved laterally over the rollers of the feed table, and as the turning bars are raised vertically the extending toe or shoulder' on each turning bar engages the bloom and turns it through the desired arc of rotation which is usually 90. \Vith this construction however, as the turning bars are raised the toes after engaging the bloom and turning it slightly very often slip out of en-.

gagement with the bloom thereby allowing it to fall back into its original position or otherwise misplacing the bloom on the rollers of the feedtable without accomplishing the work desired. When this occurs it has been necessary heretofore to retract the side guards then lower the turning bars, then advance the side guards until they engage the side of the bloom and then raise the turning bars again. .In this manner considerable time is lost.

The object of my invention is to obviate the necessity of retracting the side guards and turning bars, in case the toes of the turning bars slip oil the bloom without turning it or accomplishing the work required.

For illustration I have shown my invention as applied to a movable side guard but I wish it understood that I do not limit myself to this manner of application as thedevice is equally well adapted for use with a stationary side guard or may be applied to the frame of the table or any similar positionin the required manner to turn the work received thereon.

One of the objects of my invention is to mount the turning bars in such a manner that the toes will positively engage the bloom on the upward stroke of the turning bars but recede into the side guards out of engagement with the bloom during the downward stroke of the turning bars.

Another object of my invention is to mount the turning bars in the side guards so they can be lowered at all times without engaging the bloom. 1

With'this object in view I mount the turning bars in slide-ways having a by-pass formed in conjunction therewith on the face of one of'the side guards. The upper ends of each of the turning bars are each pivoted to a lever having means connected therewith adapted to raise and lower the turning bars while a weighted lever having one end pivoted to each of the turning bars at an intermediate point is slidably supported by a rock-shaft which is journaled 1n bearings mounted on the machine. The weighted levers are so mounted and pivoted to the turning bars in such a manner that when the turning bars are raised the weight on the end of the weighted levers will incline downwardly from the turning bars and swing the lower ends of the turning bars inwardly,

the same more clear, refer to the accompanying two sheets of drawings forming a part of this specification and in whlch li e c arv acters refer to like parts. 7

Fig. 1 is a top plan view of a portion of a rollin mill with parts of the frame 1n section s owin the table at one side of the reducing rolls and the manipulator associated with the table, embodying my Invention- 7 Fig. 2 is a vertical transverse section taken on the line 22 of Fig. 1;

Figs. 3 and 4 are detail section views through the side guards and one of the tuniing bars illustratin two alternative ways of constructing the y-pass, the sections being taken substantially on the line 33 of Fi 2; and

ig. 5 is a horizontal section view taken on the line 5-5- of Fi 2. Referring now to t e var ous characters of reference upon the drawings and first more particularly to Figs. 1, and 5, the

numeral 1 designates the reducing roll of a 55 blooming mill or the like, on each slde of which is a feed table 2 and 3 composed of a series of rollers 4 supported in the side frames 5 of the tables and operated preferably by means of bevel gearing 6 1n the usual well known manner.

Arranged to move laterally over the rollers 4 of the feed tables at right angles to the axes of the rollers, are two side guards 7 and 8 the chief function of which is to shift the work laterally on the feed rollers so as to position the work for the des'iredpass of the reducing rolls. These side guards are preferably made heavy and rigidenough so that they can be utilized to straighten the work should it be curved or bent by passing between the reducing rolls. v

Each of the two side guards 7 and 8 is supported and actuated by means of two horlzontal arms or beams 9 and 10 serving as guides, which extend laterally from the side guards at one side of the table and are actuated by means of pinions 11 and 12 mounted on shafts 13 and 14 engaging rack teeth 15 and 16 on the underside of the arms or beams 9 and 10, and driven by motors 17 and 18 through the reduction gearing 19 and 20. The forward ends of thebeams 9 and 10 are slidably supported on slide-wa s between the tracks 24 and 25. These sli e-ways are protected from falling scale or other foreign substances by means of extension bars 21 and 22 forming shields for the slide-ways, one end of each of which is pivoted at one end to one of the forward ends of the beams 9 and 10 while the opposite ends extend outwardl therefrom and are supported by means 0 rollers 23.

In order to simplify the descri tion I have shown in Fig. 1 the roller fee table with bloom manipulating means only one one side of. the reducing rolls but'it will be understood that a table with a manipulating means and mechanism for operating the same will be mounted at the opposite side of the reducing rolls 1 which table will be provided with side ards similar to the side guards 7 and 8. n actual practice it is desirable that the side guards at one side of one table and the correspondin uard at the same side of the op osite tab e main-v tained in ali ent an actuated in unison through similar mechanism. To that end each shaft 13 and 14 is adapted to extend along the table on the opposite side of the reducing rolls and have connected thereto the same kind of an operating mechanism for each manipulating means.

A casting 26 connects the tops of the arms or beams 9 together which are adapted to operate theside guard 7, having two pairs of upwardly extending brackets 27 and 28 in which is journaled at an intermediate point the rock shafts 29 and 30 having holes 31 formed therethrough for slidably supporting the weighted levers 32 and 33 each having a weight adjustablysecured to one end as at 34 while the opposite end is pivoted 'as at 35 to the intermediate portion .of a

turning bar 36. The brackets 27 and 28 have journal bearings 37 and 38 at ,their tops forming bearings forthe turning bar operating shafts 39 and 40.

An arm 41 and a bell crank lever 42 is attached to each of the turning bar operating shafts 39 and 40. The end of one arm of each of the bell crank levers being ivoted to or near the top of the turning ars while the other arm is pivoted to one end of a pitman 43, the opposite end of the pitman 43 being connected to crank arms 44 mounted on shaft 45 and rotated by means of a pair of motors 46 through the reduction gearing 47.

The turning bars 36 are each providedat their lower ends with a toe 48 for enga 'ng and turning the bloom 49, these turning ars 36 are adapted to reciprocate vertically in slide-ways 50 and by-passes 51. Each of said turning bars having lateral projections 52 with inclined upper and lower faces 53 and 54. The projections 52 are adapted to engage the face of the flanged edges 55 at the sides of a passageway 56. This passageway 56 being wide enough to permit a turning bar 36 to pass between the flanged edges 55 when they are swung inward or out ward by the action of the weighted levers 32 and 33, after the projections 52 have passed ends of the retaining face plates 59 attached to the face of the side guards 7. These ends of plates 59 engage the lateral projections 52 and limit the outward swinging movement of the lower ends of the turning bars 36. The said ends of plates 59 being spaced apart to allow the toe 48 to extend outwardly between the same.

In Fig. 3 I have illustrated an alternative manner of constructing the by-pass in which the slide-way 50 is formed in and between the ends of the face plates 59 with an offset or flanged edge to limit the outward movement of the turning bars 36. The front face of the block 57 being mounted in the recess 58 flush with the face of the side guard 7, and in Fig. 4 I have shown another modification in which the by-pass 61, passageway 62 and flanged edges 63 are formed in the face of the side guard 64. The slide-way and ends of face plates 59 being constructed the same as in Fig. 3. 1

The operation of my device is as follows: Assuming that the parts are in the position illustrated in Figs. 1, 2 and 5 and the motors 17 and 18 for operating the two side guards 7 and 8 eithersingly or in unison through the reduction gearin 19 and 20 shafts 13 and 14, pinions 11 an 12 which engage rack teeth 15 and 16 on the underside of the arms or beams 9 and 10 and to move it back and forth over the rollers to place the work for the desired position or pass between the rolls and to straighten the work 0 if it becomes necessary, and it is desired to rotate the bloom 49, the turning bars 36 are raised by means of the motors 46 through the reduction gearing 47 which rotates the shaft 45 and crank arms 44 a part of a revolution, thereby swinging the pitmen 43 and bell crank lever 42 each of which has one arm pivoted to or near the upper end of the turning bars 36.

As indicated in Fig. 2 the turning bar 36 is shown in its lowered position in full lines, in this position the weighted levers 32 and 33 project the turning bars 36 forward so that the toe 48 extends under the bloom 49 and as the arms 41 and bell crank levers 42 are raised the turning bars travel upwardly in the slide-ways 50, the toes 48 engaging and turning the bloom the desired arc of rotation. When the turning bars 36 have been raised the projections 52 will be raised above the flanged edges 55 and the weighted levers 32 end 33 will then incline downwardly from the turning bars 36 and the weights 34 thereon will slide the levers downwardly through the holes 31 formed in the rock shafts 29 and 30 and swing the lower ends of the turning bars 36 inward until the toes 48 are inside the outer face of the side guard 7 as shown in dotted lines. In this position when the turning bars 36 are lowered they will slide downwardly in the by-pass 51 with the toes 48 inside the outer face of the side guard 7until the projections 52 are below the lower ends of the flanged edges 55, in this'position the weighted levers 32 and 33 will incline upwardly from the turning bars36 and the weights 34 thereon will project the lower ends of the turning bars 36 forward again into the position indicated in full lines, so thatthetoes 48 will engage the bloom 49 when the turning bars 36 are raised.

WVith my construction in case the toes. 48 slip out of engagement with the bloom 49 before turning it the desired arc of rotation and the bloom falls back into its original position or becomes otherwise misplaced it is only necessary to raise the turning bars to the position indicated in dotted lines in Fig.

shown in full lines, and then advancethe side guards, in this way much time is saved in the operation of the device.

. It will be noted that when the turning bars 36 are in the lowered position the weighted levers 32 and 33 each having one of their ends pivoted thereto will incline upwardly from the turning bars and will project the lower ends of the turning bars 36 forward, but as the turning bars are raised the upward movement of the pivoted ends of the weighted levers rotate the rock shafts 29 and 30. After 2 and-then lower the same to the position the pivoted end of the weighted levers pass the horizontal plane of the center line of the rock shafts and passes above the angle of repose the weighted levers will then incline downwardly from the turning bar and by action of the weight on the ends the weighted levers will slide downwardly through the holes 31 and retract the lower ends of the turning bars. Although I have shown the weighted levers as inclined at substantially the same angle above and below the horizontal plane of the rock shafts in the raised, and lowered positions of the turning bars I do not limit myself to this angle as it may be greater or less as desired, but in any case it will be understood that in either the raised or lowered positions of the turning bars, the weighted levers pivoted thereto that the inclination of the weighted levers when they incline upward or downward to operate must be above or below the angle of repose of the horizontal plane of the rock shafts 29 and 30. Although I have described and illustrated my invention in considerable detail, I do not wish to be limited to the exact and specific details thereof, as shown and described, but may use such modifications in substitutions for, or equivalents thereof, as are embraced within the scope of my invention, or as pointed out in the claims.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. In a manipulator for rolling mill feed turning ba-rs each having an extending toe adapted to engage and turn the work on the table, and means for projecting the toes beyond the side face of the guard and for retracting the toes of the turning bars within the side face of the guard.

2. In a manipulator for rolling mill feed tables, a side guard movable over the table, pivoted turning bars each having an extending toe adapted to enga e and turn the work on the ta-blc, and sliding weighted meanssecured to the turning bars for projecting and retracting the toes of theturnbars are raised, means for raising and lowering the turning bars, means for projecting the lower ends of the turning bars when the turning bars are lowered, said projecting means adapted when the turning bars are raised for retracting the toes at the lower ends of the turning bars inside the side face of the guard.

4. In a manipulator for rolling mill feed tables, a side ua-rd movable laterally over the table, turmng bars pivoted at their upper ends and movable with the side guard adapted to turn the work on the table, means for raising and lowering the turning bars in two vertical paths, means for shifting the turning bars from one path to the other, said shifting means pivoted to the turning bars and adapted for projecting the lower ends of the turning bars in the lowered position and for retracting the lower end of the turning bars in the raised position.

5. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table, slide-ways formed in the side guard, a by-pass formed at the side of each of the slide-ways, a pivoted turning bar for each slide-way, means for raising the turning bars in the slide-ways, means for shifting the turning bars into alignment with the by-passes and means for lowering the turning bars in the by-passes. v

6. In a manipulator for rolling mill feed tables, a side guard movable laterall over the table, slideways formed in the ace of the side guard, a bypass formed in conjunction with each slide-way, a pivoted turning bar adapted to be raised in each slideway and turn the work onthe table, means attached to the turning bars adapted to swing the turning bars into vertical alignment with the bypass and means for lowering the turning bars in the by-passes.

7. In a manlpulator for rolling mill feed tables, a pair of independently operated side guards movable laterally over the table,

Lamaze slide-ways formed in the face of one of the side guards, a by-pass formed in conjunction with each slide-way, a turning bar pivoted at its upper end adapted to be raised in each slide-way and turn the work on the table and then lowered through the by-pass, a weighted lever attached to each turning bar adapted to swing the turning bars in one (llI'GCtlOIl' oted at its upper end and having an extending toe at its lower end adapted to be raised in each slide-way and turn the work on the table, a weighted lever pivoted at one end to each of the turning bars, a rock-shaft for slidabl supporting the intermediate portion 0 the weighted levers, said weighted levers adapted to project the lower ends of the turning bars forward in their lowered position and retract the turning bars in the raised position, and means for lowering the turning bars in the by-pass.

9. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table, turning bars each pivoted at their upper ends and having a toe at their lower ends adapted to engage and turn the work on the table, and means for projecting the toes of the turning bars beyond the working side face of the side guard and for retracting the toes of the turning bars back of the working side face of the guard.

10. In a manipulator for rolling mill feed tables, a pair of independently operated side guards movable laterally over the table, slideways formed in the face of one of the side guards, a by-pass formed in conjunction with each SlldB-WZQQZL passageway between each of the slide-ways and the by-passes, a turning bar pivoted at its upper end having an extending toe at its lower end adapted to be raised in each slide-way and turn the work on the table, a weighted lever pivoted at one end to each of the turning bars, rock-shafts having holes therethrough for slidably supporting the intermediate portions of the weighted levers, said weighted levers adapt ed to project the turning bars forward through the passageways between the bypasses and the slide-ways when the turning bars are in their lowered position and retract the turning bars in the raised position and means for lowering the turning bars in the by-passes.

11. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table, slide-ways. and by-passes formed in conjunction with each other on the face of the side guard, a passageway between each slide-way and by-pass, a turning bar. having a toe at the lower end adapted to be raised in each slide-way and lowered in the by-pass,

- lateral projections on the turning bars for posite sides of the passageways, a turnmg' holding the turning bars in the slide-wa s or by-passes during the reciprocation o the turning bar, a Weighted lever havm one end pivoted to each turning bar and a apted to project the turning bar forward through the passageway when in the lowered position and to retract the turning bar when in raised position.

12. In a manipulator for rolling mill feed table, a side guard movable laterally over the table, a slide-way formed in the face of the side guard, a by-pass, a passageway between the slide-way and the by-pass, flanges on opposite sides of the passageway, a turn ing bar having means attached thereto adapted to pro ect the turning bar 1n its lowered position and to retract the turning bar in its raised position, and means for reciprocating the turning bars in the slideways and by-passes.

13. In a manipulator for rolling mill feed tables, a side guard movable laterall over the table, a plurality of slide-ways ormed in the face of the side guard, a by-pass formed in conjunction with each slide-way in the side guard, a passageway between each slide-way and the by-passes, flanges on opar for each slide-way having lateral rojections for engaging the flanges at the s1des of the passageways, means for raising the turning bars in the slide-ways, means for retracting the turning bars into vertical alignment with the by-passes, and means for lowering the turning bars in the by-passes.

14. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table, a plurality of slide-ways formed in the face of the side guard, a by-pass formed in conjunction with each slide-way in the side guard, a passageway between each slideway and the by-passes, flanges on opposite sides of the passageway, a vertically movable turning bar for each slide-way having lateral projections for engaging the flanges at the sides of the passageways during the vertical movement of the turning bars, means for raisin-g the turning bars in the slide-ways to turn the work on the table, means for retracting the turning bars when raised into vertical alignment with the by-passes, and means for lowering the turning bars in the by-passes.

15. In a manipulator for rolling mill feed table, a side guard movable laterally over the table, a plurality of slide-ways formed in the face of the side guard, a by-pass formed in conjunction with each slide-way in the side guard, a passageway between each slide-way and by-passes, flanges on opposite sides of the passageways, a vertically movable turning bar for each slide-way having lateral projections near the lower ends for engaging the flanges at the sides of the passageways during the vertical movement of the turning bars, an extending toe formed at the lower end of each turning bar, means for raising the turning bars until the lateral projections are above the flanges at the sides of the passageways and for the projecting toes to engage and turn the work on the table, a weighted lever pivoted to each turning bar for retracting the turning bars when raised into vertical alignment with the by-passes, means for lowering the turnin bars in the by-passes until the lateral pro ections are below the lower end of the flanges, and means for projectin the lower end of the turning bars forward in the lowered position.

16. In a manipulatorfor rollin mill feed tables, a side guard movable latera ly over the table, recesses formed in the face of the side guard, a block seated in each recess having a by-pass and a passageway formed therein, flanges at the side of saidpassageway, a slideway formed in front of each of the passa eways and flanges, a turning bar adapted or table, recesses formed in the face of the side guard, a block seated in each recess having a by-pass and a passageway formed therein, flanges at the sides of said passageways, a turningbarhavinglateral projections adapted for vertical movement in each of the slideways and by-passes, means for raising the turning bars in the slide-ways until the lateral projections are above the upper ends of the flanges at the sides of the passageways, a weighted lever pivoted to each turning bar adapted to swing each turning bar into vertical alignment with the by-passeg, means to lower the turning bars in the by-passes until the lateral projections are below the lower ends of the flanges at the sides of the passageways, said weighted levers adapted to project the turning bars forward through the passageways'when the turning bars are lowered, and plates on the face of the side guard for engagmg the lateral projections on the turning bars and to limit the forward movement of the turning bars.

18. In a manipulator for rolling mill feed tables. a side guard movable laterally over the table, recesses formed in the face of the side guard, a block seated in each'recess having a by-pass and a passageway formed therein, flanges at the sides of said passageways, a turning bar mounted for vertical movement in the slide-ways in front of the passageways, means for reciprocating the turning bars, lateral projections on the turning bars for engaging the front face of the flanges at the side of the passageways when the turning bars are raised in the slide-ways, a weighted lever slidably supported on a rock shaft and attached to each turning bar adapted to swing each of the turning bars into vertical alignment with the by-passes when the turning bars are raised above the flanges at the sides of the passageways. means for lowering the turning bars in the icy-passes, said weighted levers adapted to project the turning bars forward through the passageways after the turning bars have been lowered below the flanges at the side of the passageways, spaced plates secured to the face of the side guard having their ends extending over a portion of the slide-ways for engaging the lateral projections on the turning bars and to limit the forward movement of the turn- I ing bars.

19. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table, a plurality of slide-ways and bypasses formed'in conjunction with each other in the face of the side guard, a passageway between each of the slide-ways and the by passes, flanges at the .side of said passageways, a turning bar having lateral projections formed near its lower end adapted to be raised in each of the slide-ways and lowered in the bypasses, and means for retracting the turning bars in the raised position and projecting the turning bars in the lowered position.

20. In combination with vthe feed table of a rolling mill,- a side guard movable laterally over the table, a plurality of slide-ways formed in the face of the guard, a by-pass formed at the side of each slide-way, a passageway between each of the slide-ways and the by-passes, flanges at the side of each passageway, a turning bar having lateral projec tions adapted to be raised in each slide-way until the lateral projections are above the flanges at the sides of the passageways, a weighted lever having one end pivoted to each turning bar and inclined downwardly therefrom in the raised position for retracting the turning bars to a position in vertical alignment with the by-passes, rock-shafts having holes formed therein through which v the weighted levers extend for slidably supporting the intermediate portions of the weighted levers, means pivoted to each turn? ing bar for raising and lowering the turn ing bars in the slideways and by-passes, means for projecting the turning bars in the lowered position after the lateral projections have passed below the flanges at the sides of the passageways, and plates on the face of the side guards for limiting the forward movement of the turning bars.

21. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table,turning bars adapted to turn the work on the table, aslide-way and by-pass formed in the guard for each turning bar means for vertically reciprocating the turning bars in the slide-Ways and by-passes, means independent of the operating means for shifting the turning bars from the slideways to the by-passes, and for automatically projecting the lower ends of the turning bars in their lowered position. t

22. In a manipulator for rolling mill feed tables, a side guard movable laterally over the table, turning bars adapted to turn the work on the table, means for raising and low-" ering the turning bars, means for automatically projecting the lower ends of the turning bars in their lowered position slidably mounted independently of the operating means for automatically retracting the lower end of the turning bars within the side face of the guard in their raised position.

23. In a manipulator, a work receiving table, a side guard, a turning bar having means for engaging the work on the table, a slideway and by-pass formed in the side guard means for raising the turning bar in the slideway, means for shifting and lowering the turning bar in the by-pass and for projecting and retracting one end of the turning bar. I

24. In a manipulator, a work receiving tablo, a side guard, a plurality of turning bars, a toe extending from the lower end of each turning bar for engaging the work on the" table, means for raising and lowering the turning bars in two vertical paths, means for shifting the turning bars from one path to the other and for projecting and retracting one end of the turning bars.

25. In a manipulator for rolling mill feed tables and the like, a frame, slide-Ways formed therein, turning bars adapted to be raised in the slide-ways in one vertical path and i o engage and turn the the work on the table means for shifting the turning bars and lowering them in another vertical path, and

for automatically projecting or retracting the turning bars at the end of each stroke.

26. In a manipulator, a work receiving tahie, a plurality of pivoted turning bars having means for engaging and turning the work on the table, means for raising and lowering the turning bars in two vertical paths, means for shifting the turning bars from one path to the other and for projecting the lower ends of the turning bars in the lowered position and for retracting the lower ends of the turning bars in the raised position.

27. In a manipulator for rolling mill feed tables, a work receiving table, a side guard, turning bars mounted in the side guard having means for engaging and turning the work on the table, pivoted means attached to the upper ends of the turning bars for raising and lowering the turning bars, and a slidably mounted weighted lever pivoted to each turning bar for projecting and retracting the lower ends of the turning bars.

28. In a manipulator for rolling mill feed tables, a table for receiving the work to be turned, turning bars having 0 aerating means pivoted at their upper ends for raising and owering the turning bars, and sliding means pivoted to the turning bars and mounted independently of the operating means for automatically projecting the lower end of the turning bars in their lowered position, and for automatically retracting the lower ends of the turning bars in their raised position.

29. In a manipulator for rolling mill feed tables, a work receiving table, vertically movable turning bars mounted onthe table, slideways formed in the table one for each turning bar, a by-pass at the side of each slideway and extending parallel therewith, a pas sage-way between each slide-way and bypass, means for raising the turning bars in the slide-ways, means for retracting the lowor ends of the turning bars in their raised position into alignment with the by-passes, means for lowering the turning bars in the lay-passes, and means for projecting the turning bars through the passage-ways into the slide-ways in their lowered position.

30. In a manipulator for rolling mill feed tables, slide-ways and by-passes formed on the table, vertically movable turning bars having projecting toes at their'lower ends for engaging and turning the work on the table when the turning bars are raised, means pivoted to the upper end of each turning bar adapted to raise the turning bars in the slideways, means pivoted to each of the turning bars for retracting the lower ends of the turning bars into alignment with the by,- passes, means for lowering the turning bars in the by-passes, and means pivoted to the turning bars for projecting the lower end of the turning bars in the lowered position.

31. In a manipulator for rolling mill feed tables, vertical slide-ways each having a bypass formed in conjunction therewith in the table, pivoted turning bars each adapted to be raised in one of theslide-ways, meanspivoted at an intermediate point to each of the turning bars for retracting the lower ends of the turning bars into alignment with the upper ends of the by-passes in the raised position, means for lowering turning bars in the by-passes, and means for projecting the lower ends of the turning bars in their lowered position.

32. In a manipulator for rolling mill feed tables. or the like, a frame, slide-ways formed in the frame, a by-pass formed in conjunction with each slide-way, a turning bar pivoted at its upper end having an extending toe at its lower end which is adapted when the turning bars are raised in each slide-way to turn the work on the table, a weighted lever pivoted at one end to each of the turning bars, a rock-shaft for slidably supporting the intermediate portion of the weighted levers, said weighted levers adapted tov project the lower ends of the turning bars forward in their lowered position and retractthe turning bars in the raised position, and means for lowering the turning bars in the by-passes.

33. In a manipulator for rolling mill feed tables and the like, a frame, slide-Ways formed in the frame, a by-pass formed in conjunction with each slide-way, a passageway between each of the slide-ways and the by-passes, a turning bar having operating means pivoted to its upper ends and having an extending toe at its lower end adapted to be raised in each slide-way and turn the work on the table, a weighted lever pivoted at one end to each of the turning bars, a rockshaft having, holes therethrough for slidably supporting the intermediate portions of the weighted levers, said weighted levers adapted to incline upwardly from their pivotal points and project the turning bars forward through the passageways into the slide-ways when the turning bars are in their lowered position and incline downwardly from their pivoted points and retract the turning bars in their raised position into alignment With the by-passes, and means pivoted to the upper ends of the turning bars for lowering the turning bars in the bypasses.

In testimony whereof I hereunto aifix my signature.

ALBERT T. KELLER.

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