US1977001A

US1977001A - Automatic polisher for rolls

Info

Publication number: US1977001A
Application number: US282579A
Authority: US
Inventors: William W Leach
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-06-04
Filing date: 1928-06-04
Publication date: 1934-10-16
Anticipated expiration: 1951-10-16

Description

Oct. 16, 1934. w w LEACH AUTOMATIC POLISHER FOR ROLLS 5 Shis-Sheet 1 Filed June 4, 1928 Oct. 16, 1934. w W LEACH AUTOMATIC POLISHER FOR ROLLS Filed June 4, 1928 5 Sheets-Sheet 2 gwmmdoz wsi Oct. 16, 1 934. W} w LEACH I 1,977,001

AUTbMATIC POLISHER FOR ROLLS Filed June 4, 1928 5 Sheets-Sheet 3 Oct. 16, 1934. w w LEACH AUTOMATIC POLISHER FOR ROLLS Filed June 4, 1928 5 Sheets-Sheet 4 JIEEE'EEU Oct. 16, w w L C AUTOMATIC POLISHER FOR ROLLS Filed June 4, 1928 5 Sheets-Sheet 5 gwuentoa l atentecl Ochlfi, 1934 I um'rso STATES PATENT orrica AUTOMATIC POLISHER roe ROLLS William w. Leach, Mansfield, Ohio Application June 4, 1928, Serial No. 282,579

19 Claims. (01. 51-253 This invention relates to an automatic polisher for'rolls.

It is well-known to those skilledin the art of rolling sheet metal and the like, that it is necessary for the roller to polish the faces of the rolls and especially the bottom roll of a two high rolling mill or the like in the period of time between heating the metal and also at other times if perchance the rollsbecome glazed, l3 rough, pitted, or pick off steel from the sheet metal, and that parts of the polishing stone break off and fall between the rolls forming depressions therein and also at times the scale flash adheres to the rolls forming pits or depressions in the face thereof, thereby'preventing the rolls from rolling sheet metal free from defects on account of the pitted or rough faces of the rolls. It is also well-known that in order to roll comparatively perfect and smooth sheets of 29 metal, having highly polished and smooth surfaces, it is necessary to-keep the rolls, especially the lower roll, which is the driver, highly polished and having a smooth face or surface, and further that the conventional tool now in use for polish- 5 ing the rolls consists of a pole or pipe having a corundurn or emery stone or the like attached to one end which is fulcrumed upon the binder rod of the mill, and the polishing stone or the like is forced with very little pressure against 30 the surface of the roll by manual manipulation and forth across the face or the surfaces of the roll.

It is also well-known that when the rolls are being polished, the roller or catcher cannot work efficientiy, because the end of the pole or pipe carrying the polishing stone extends outward from the mill, interfering with the work of the catcher, as the pole projects over the space on the floor of the mill which is ordinarily occupied so by the catcher, thereby interfering with his work. It is also well-known that the lower roll, which, as stated, is the driver roll of the mill, more quickly becomes glazed, rou gh, pitted and impregnated with scale flash and steel from the sheet metal and is more liable to have impressions formed on the face or surface thereof, and that while operating under the same conditions, the upper roll remains comparatively smooth.

It is further well-known that in the use of the o0 pole and stone polishing the rolls rnanually,

the surfaces or faces of the rolls are not polished uniformly and plane across the surface, because the polisher is apt to polish more on one place of the face of the rollthan on another part of the face, and that he will exert more or less pressure on the roll at dilferent points along the face thereof, thereby affecting the uniformity and extent of the polishing on the facesof the rolls, the result being that the polish and smoothness of the sheet metal, that is rolled between such rolls, is defective.

It is further Well-known that if the rolls are kept highly polished and free from defects and depressions, the plate or sheet metal being rolled can be pulled through the rolls much more rap- 6 idly, conveniently, and easily, and further that it requires less power to roll the same between the rolls.

It is further well-known that if the rolls are kept highly polished, the steel or metal which is being rolled can be more easily stretched to longer and more precise length than can be accomplished if the surface of the rolls are more or less glazed, pitted, scaled, rough, having impressions therein, or when the steel adheres thereto, and further that when the lower roll is polished separately from the upper roll, (and as it requires to be polished more frequently than, the upper roll), the polishing stone is prevented, when it breaks, from falling between the rolls, marking the surfaces thereof or defacing the faces thereof. l

The primary object of the invention is to provide an automatic polisher that is especially adapted for continuously polishing the lower roll of a rolling mill, during the time the mill is being operated in rolling metal sheets or the like.

Another object is to provide means for exerting greater pressure of the stone upon the face of the rollthan can be obtained by manual polishing thereof, thereby more quickly, and conveniently polishing the same, and also to provide for polishing the entire face of the roll, more uniformly and smoothly.

A further object is to apply an automatic pol isher to the mill for polishing the rolls that will not interfere with any of the workmen in operating the mill when rolling, thereby affecting the tonnage or capacity of the mill.

A further object is'to provide means for keeping and maintaining thelower roll of the mill in a highly polished condition at all times and rolling sheet metal products smoother than can be accomplished when using a stone attached to a pole orpipe for polishing, as is now being used for that purpose.

A further object of the invention is to'save the time of the roller and other men working on and about the mill in rolling sheet steel products, because it is'fnot necessary to stop rolling to polish the lower roll, thereby saving time and labor.

A further object is to provide means for maintaining the lower roll in a more perfectly polished condition at all times and free from pits or from having rough and irregular faces or surfaces, whereby the product or sheet metal may be rolled therebetween much easier, requiring less power, and affording a better means for stretching the steel to a longer length and to the precise size desired.

A further object is to provide a smooth and highly polished roll that is being polished at all times whereby less passes will be required .to stretch the sheet metal or steel to the required length and further to polish off the steel that adheres to the roll which the roll picks off from the steel or metal as the metal is being rolled between the rolls.

A further object is to provide means for polishing the lower roll and locating the automatic polisher in such a position that in the event of the corundum or emery stone breaking, the parts will drop down clear of the roll, thereby saving the rolls from being pitted or forming depressions therein from the broken part or parts of the emery stone.

Another object of the invention is to provide means for polishing the roll that can be regulated and governed to travel over pre-determined por-.

tions of the face of the roll or over the entire surface thereof at the will of the operator, for a definite period of time if any portion of the face of the roll becomes rougher than another portion and therefore requires more polishing at a pre-determined point or points on the face of the roll than at other places on the face of the roll.

A further object of the present invention is to provide means for highly polishing and smoothing the face of the lower roll, so that when the sheet metal is matched and given matching passes.

it will leave a much smoother face on the inner faces of the matched sheets.

A further object of the invention is to relieve the roller of any effort in keeping the faces of the rolls highly polished and smooth by having the pits and depressions removed therefrom by an automatic means rather than by human effort, thereby insuring a highly polished and smooth face of the roll at all times without effort on the rollers part or loss of time that would lessen the tonnage of sheet metal or the like produced by the mill. 7

A further object is to provide a polisher that will cause the emery or corundum stone to continuously travel across and in contact with the face of the roll (or a portion thereof) from end to end and at a pre-determined time reverse itself automatically and travel in the opposite direction. a

Another object of the invention is to provide means for forcing the polishing stone to exert more or less pressure on the face of the roll at the will of the operator. 7

Another object of the invention is to provide means for presenting different portions ofthe face of the stone to the face of the roll to'present' a new or different cuttingor polishing surface'of the stone to the roll at the will of the operator.

Another object of the invention is to provide means for automatically moving the stone over the face of the roll in both directions, alternately and continuously.

Another object of the invention is to provide means for permitting the mechanism to idle when the same is not being operated for polishing purposes.

Another object of the present invention is to apply power for driving the automatic polisher from the wabble of the mill.

A further object is to provide means for connecting the wabble to the polishing machine by a safety connecting rod which is designed to yield and respond to any irregularity or unusual stress that is imparted to it from its connection to the wabble or the housing of the mill.

Another object is to provide means for accelerating the throw of the shifting mechanism when and providing means for supporting the polisher and its associated mechanism.

I These and other objects are attained by the mechanism illustrated in the accompanying drawings in which Fig. 1 is a front elevation of a two high rolling mill, equipped with the conventional equipment 1-.

for rolling and also showing the automatic polisher applied thereto.

Fig. 2 is a side elevation of Fig. 1 showing the invention applied to the mill and also showing a safety connecting rod which is connected to a 1'."

Fig. '3 is a front elevation or plan view of a I''..

key member which is used to secure the brackets to the housings of the mill and upon which the polisher is mounted.

Fig. 4 is a side view in vertical section of the key bracket and bolts, showing the position they assume when the brackets are attached to the housings, taken on the line of 4- 1 of Fig. 6.

Fig. 5 is a plan view of the carriage, showing the end of the mechanism which carries the polishing stone and also a View of the tubular member upon which the carriage of the polisher travels and the mechanism for operating same.

Fig. 6 is a side View of one of the brackets, showing same keyed to the tubular member and cross section of the worm shaft and tubular member.

Fig. 7 is an end view of Fig. 6.

Fig. 8 is a fragmentary plan view of the other bracket showing means for keying same to the tubular member in a ore-determined position to prevent turning thereof.

Fig. 9 is a side elevation of the safety connecting rod showing same removably connected to the crank pin of the clamping means which is attached to the wabble of the roll and to the roller that is carried betweenthe upper portions of the rocker arms, the lower portions of the arms being broken away. i

Fig. 10 is a cross sectional end view of Fig. 5 A

taken on the line 10-10 of Fig. 5.

Fig. 11 is. a view taken on the line l1-11' of Figure 12 showing the tilting beam that carries the emery stone or the like and having means of turning the stone and anindependent mechanism for forcing the stone in contact with the lower roll of the mill.

Fig. 12 is a side view of the polisher, showing a portion of the traveling carriage, means for supporting the carriage as it moves in either direction between the housings of the rolls when polishing the lower roll, and it also shows the downturned hooked portion of the carriage upon which the tilting beam that carries the emery stone is mounted.

Fig. 13 is a cross sectional View taken on the line 13-13 of Fig. 12.

Fig. 14 is a cross sectional end view of Fig. 12 taken on the line i l-14 of Fig. 12.

Fig. 15 is a central sectional view of the automatic polisher with parts removed to more clearly show the operation of the bifurcated member, the inclined plane which operates a plunger member, a spring mounted in the shifter rod, in expanded position, and the worm nut engaged with the worm screw shaft.

Fig. 16 is a broken view of Fig. 15 showing the shifter rod spring in compressed position.

Fig. 17 is a side view of the worm screw nut which engages the worm screw shaft.

Fig. 18 is a cross sectional end view of Fig. 15 taken on the line l8l8 of Fig. 15.

Fig. 19 is a fragmentary View of the tubular member showing the means for operating the traveling carriage with the bell crank at the end end of its inward throw in full lines and its outward throw in dotted lines.

Fig. 20 is a fragmentary view of Fig. 19, showing the bell cranl: and sleeve in full lines positioned at the end or" their outward throw.

Fig. 21 is a front view of one of the rocker arms shown broken away and also showing a double ended pawl and the springs for maintaining the pawl in mesh with the ratchet wheel on either side of the ratchet wheel.

Fig. 22 is a side View showing the double ended pawl, rocker arm, yoke, cross section of the shifter rod, and tubular member, showing one end of the pawl in mesh with the teeth of the ratchet wheel.

23 is a cross sectional plan view taken on the line 23-23 of 19, showing a sectional view of the bell crank and means for supporting and maintaining the springs in position for operating the pawl in association with the ratchet wheel, also the means for maintaining the bell crank and its associated mechanism in a predetermined position.

Fig. 24 is a side view of one of the rocker arms, showing one of the ends of the tubular ended pawl in mesh with the teeth of the ratchet wheel, and also, in section, a pointed pin which is spring pressed to maintain same in yielding contact with countersunk portions formed on the bell crank, and also a view of the springs that actuate and hold the pawl in mesh when the pawl is actuated to mesh and drive the ratchet wheel in either irection, taken on the line 24-24 of Fig. 19.

Fig. 25 is a vertical section view of a part of he rocker arms showing means for maintaining ho double ended pawl in neutral position.

In the drawings, the automatic polisher is shown applied to a conventional two high rolling mil, the arrangement and construction shown preferably adapted for polishing the lower roll of a two high rolling mill. It is to be understood, however, that the invention is not limited to a two high rolling mill, but can be adapted and applied for use on other mills, or for the top roll,'by making immaterial changes that would be suggested to one skilled in the art to which it appertains.

The conventional two high rolling mill, as diagrammatically shown in the drawings, is described in brief as follows-- Housings l and 2 are provided in which rollers 3 and l are suitably journaled and bearing blocks 5 and 6 are held in place in the usual manner by the adjustin screws 77. The rollers are provided at each end with the usual wabble ends 8. The guide plate is indicated by reference numeral 9, and the horns thereof are represented by reference numeral 1c. The horns and the guide plate are supported at one end upon an adjustable guide rest 11.

Brackets 12 aresecured to the housings and L-shaped supports 13 are adiustably held in an adjusted position by pins 14. The L-shaped portions 15 of the supports project inwardly and are provided with a series of notches 16, so as to space and adjust the billy roll 17 from the hous ings, so as to permit it to extend above and over the polisher. The billy roll 17 is mounted upon a shaft 18.

The above describes the conventional equipment applied to a conventional two high rolling mill. In addition to the above described equlpment, a round supporting bar 19 is supported by and located between the housings for a purpose that will be described hereinafter. Reference numeral 20 indicates an ordinary brace bar used for the housings of a wo high rolling mill.

Means for mounting and connecting the carriage for movement in either direction. und means for supporting the automatic polisher on the housings of the rolls In the construction of the automatic polisher, a tubular member 2i provided, and a shouldered bearing bushing 22 is secured within the interior at one end, and a shouldered bearing bushing 2.3 is secured within the interior at the opposite end. The center portions of the shouldered

bearing bushings

22 and 23 are bored to provide boa-rings at each end for the worm screw shaft 24.

In order to hold the bearing bushing 22 in position, a collar 25 is secured to the end of the worm screw and held in place by set screw 26.

The collar 23 is held in place by set screw 27.

A' hub 28 of the ratchet wheel is secured to the worm screw 24 by a headed pin 29. A ratchet wheel 80 is rotatably mounted upon the bush- A T-shaped carriage 31 is sildably mounted upon the tubular member 21 and is adapted to be moved in either direction by a worm. screw nut which is mounted on the ca iage and en gages the worm screw shaft. It is constructed and assembled as follows: 7

The worm screw nut 32 is screw-threaded to engage the worm screw shaft 24. The nut is provided with a lug 33 which engages a slot 34 formed in the tubular member 21. Semi-circular wings 35 and 36 are made integral with the nut and are adapted to contact with a shouldered portion 37 of the carriage and the annular flange 38 which is secured to the end portion 39 of the carriage. One portion of the carriage 40 is connected to the main body portion thereof by a screw-threaded connection as shown at ll).

It will be noted that the o eningor recess 41 is largerat one end, which is closed by the an-- nular flange 33. The larger aperture is provided for clearance to permit the nut to be moved lid into position in the main body portion of the carriage.

When the polisher is assembled, it will be noted that the carriage, when moved in one direction, contacts with one side of the wing nut, and when moved in the opposite direction, contacts with the other side of the wing nut. This movement of the carriage takes place when the worm screw is rotated in either direction by a pawl and ratchet mechanism, hereinafter described.

Means for supporting the U-shaped tilting or pivoted beam that carries an emery stone for polishing, and means for supporting the adjustable means for tilting the beam The carriage 31 is provided with a U-shaped projecting arm 31 which is preferably formed U-shape and terminating as indicated at 42. A hooked shaped portion 43 is provided on the carriage extending beyond and substantially parallel with the end 42 in spaced relation thereto, leaving a recess 44. A roller 45 is rotatably mounted and positioned in a longitudinal direction with respect to the arm 31 and is mounted on a pin 46 which is secured to the end 42 of the carriage. The inturned extremities 47 of the portion 43 are provided with open bearings 48.

The extremities 47 of the portion 43 are positioned in spaced apart relation thereto, leaving a space 49 therebetween. A tilting or pivoted beam 50, which is preferably formed U-shaped, is provided and a series of leaf springs are secured to the beam at one end by a bolt .51 or the like. The opposite ends of the springs are arranged in overlapping relation to each other with the top leaf extending beyond the others and provided with a bifurcated member 52 which is secured thereto by a bolt 53.

A clip 54 is made integral with the beam and other clips such as shown at 55 and 56 are used to clamp the leaves of the springs together that make up the assembled spring A. A member 57 is attached to the carriage and a semi-circular depression 58 is formed the face thereof. The beam 50 is provided with a pin 59 which extends beyond the sides thereof to provide trunnion journals to rotatably lit in the bearings 48 formed in the inturned extremities 4'7 of the part 43 of the arm 31'.

It will be noted that the beam 50, the leaf spring carried thereby, and its associated mechanism, are supported to tilt or pivot. To the free end of the tilting beam 50, side bearing plates 62 and 62 are secured, and they rotatably support a semi-circular fiat top member 63. The flat portion of the journal 63 is grooved and dove-tailed, as shown at 64, and an emery stone 6.5 or the like is secured and fitted therein and held in place by a conventional key or the like. The emery stone is preferably formed round on its face. The journal 63 is provided with a lever arm 66.

For tilting the beam 50 to increase or decrease the pressure of the stone upon the roll when'polishing same, the following control and feeding mechanism is employed:

A feed screw 6'7, having its end rounded to fit the depression 58, is provided. A nut 68, having a dual inclined upper portion 69, is threadably engaged to the feed screw 6'7. The apex of the inclined portion of the nut engages a groove '70 formed in the bifurcated member 52 which straddles the feed screw. A wheel 71 is rigidly secured to the feed screw. When the wheel '71 is actuated in the direction desired, the beam 50 is tilted to force a greater or less pressure of the stone against the periphery of the roll for polishing purposes, at the will of the operator.

Means for turning the emery stone independent of the feeding mechanism to present difierent portions of the face of the stone to the roll To provide means for turning the stone independently of the feeding means, to present fresh portions of the stone to the roll that has not been glazed, the following described mechanism is employed:

A depending L-shaped support '71 is secured to the tilting beam 50 by the bolt 51 at one end, and the opposite end '72 is down-turned, providing a bearing and support for an internally screwthreaded tubular connecting member 73, which is journaled in a bearing '74, which is also supported by the bracket '72 and located adjacent to one end of the member '73. The interiorly screw-threaded end of the member '73 threadably engages the exteriorly threaded end of a connecting rod '75. The opposite end of the connecting rod is bifurcated and pivotally connected to the lever 66 by a pin '76. When the star wheel 7'7 is actuated, the threaded engagement of the connecting rod '75 with the tubular connecting member 73 moves and rocks the semi-circular member 63 and the emery stone mounted thereon in either direction desired, thereby presenting a clean, fresh and unglazed portion of the face of the stone, whereby effective and efficient cutting and polishing ol the roll is accomplished without the necessity of removing the stone to clean or remove the glaze therefrom until the whole surface is glazed.

It will be noted that the tilting beam can be removed from the carriage without the removal of any bolt or the like, and without interfering with the operation of the rollin' mill by lifting it up until the trunnion journals reach the space or recess 49 and then withdrawing same from the bearing in the extremities 47 formed in the part 43 of the arm 31. To regulate and limit the throw of the semi-circular member 63 in either direction, a portion is cut away, as shown at '78, in one of the side plates, the margins of which contact with the stop pin 79 secured to the semicircular member.

Means for mounting and supporting the automatic polisher on the housings of the rolls To mount and support the automatic polisher on the housings of the rolling mill, two

brackets

80 and 81 are provided. The brackets are bored to fit over the tubular member 21. Bracket 81 is keyed to the tubular member by a key 82 which has a groove 83 formed therein and is held in place by bolts 84 as shown in Figs. 6 and '7. The key prevents the bracket 31 from turning around on the tubular member 21. The bracket member 80 is provided with a key 85 which fits into and slides along and within the groove 34 formed in the tubular member 21, preventing the bracket support from turning thereon. In other words, the keys hold the brackets in alined position with respect to each other and the fastening bolts on the housings.

The bracket 80 is also provided with a square aperture 86, to slidingly support one end of a shifter rod. The brackets are mounted on the tubular member 21 which carries the automatic polishing mechanism, and the entire mechanism is then taken and mounted on and engages bolts or the like 8'7 and 88 which are threadably secured to the housings of the mill. The bolts 8'7 and 88,

that are secured to the housings, aline with the

tached slots

89 and 90 formed in the bracket supports 81 and 82 and the heads of the bolts contact with the countersunk portions 91 and 92.

When the brackets are in said position, key plates 93, having

apertures

94 and 95 formed therein, that intersect with

slots

96 and 97, are inserted. between the heads of the bolts and brackets. The apertures permit the heads of the bolts to clear and the keys are interposed between the heads of the bolts and the brackets. The keys have tapered

portions

98 and 99 formed thereon intersecting with the apertures so that anyvibration, play, or loss motion will be taken up automatically by the keys through the medium of the tapered portions as shown in Figs. 3 and 4.

The bracket supports hold and support the au tomatic polisher mechanism outward from the housings of the rolls and in a position that will not interfere with the conventional equipment of the rolling mill. To further support the arm 31' of the carriage and its associated mechanism, the circular bar 19 is inserted in the recess 44 in a position to contact with the roller 45. When the arm and carriage and its associated mechanism are moved in either direction, the roller 45 rolls over the circular bar 19, thereby supporting the carriage, arm, and associated mechanism.

Means for imparting movement to the worm screw and associated means for regulating, control- Zing, and governing the movements thereof structed as follows? A standard 100 is secured to the tubular member 21 by bolts 101. A cylindrical member 102 having arms 103 and 104, which extend over and beyond the tubular member 21, are pivotally at-. to the standard 100 by a bolt 105. A'

sleeve 106 is slidably mounted on the tubular member 21 and is provided with projecting members 167 and 103. Slots 109 and 110 are formed in the projecting members. Bolts 111 and 112 are secured to the arms 103 and 104 of the cylindrical member 102 and register with and depend into the slots 109 and 110. Between the arms 103 and 104 a double inclined plane 113 is secured to the tubular member 21 and is normally positioned in alinement with the center of the throw or movement of the cylindrical member 102. The cylindrical member 102 is provided with a square or other irregular bore 114 which alines with an intersecting rounded bore 115. A plungerllfi, having its upper portion formed square or the like and its lower portion round, is mounted within the apertures just described.

The square portion of the plunger is made larger than the round portion forming a shoulder 117. The round bore 115 is made larger-in diameter than the round portion 118 of the plunger and an expansible coil spring 121 is fitted over the round portion of the plunger and is adapted to exert a pressure against t e shouldered portion of the plunger and the cap of the cylindrical member to force the rounded end 119- of the plunger in contact with one face of the double inclined plane 113. A cap 120 is threadabh connected to the end of the cylindrical member 102 to house and maintain the expansible spring 121 in place under tension. A shifter rod B is preferably made in two parts or different sections, one part 122 being made square and the other part 123 round. The parts of the shifter red are coupled together by a coupling 124. One end of the shifter rod is supported in the square aperture 86 of the bracket support 30 and passes through a square aperture 125 formed in an ear 126 which is provided on the traveling carriage 31.

Dogs 127 and 128 are slidably mounted on the square part 122 of the shifter rod and are arranged on each side of the ear 1236 leaving the ear interposed therebetween. The dogs are held in any desirable adjustment on the shifter rod by

thumb screws

129 and 130, the ends of which pointed and adapted to engage the countersunk depressions 131 to prevent slippage of the dogs.

A tubular barrel-shaped fitting 132 is provided with acap which is threadably connected to the fitting 132. The cap has an aperture formed in the center thereof to receive the round part 123 of the shifter rod and provide a bearing therefor. The barrel-shaped fitting is provided with a bifurcated end consisting of arms 134 and 135 which are pivotally connected to the cylindrical member 102 by bolts 136. Sleeves 137 and 138 are provided with slots 139 and 140 and mounted upon the round part 123 of the shifter rod which extends into the interior of the tubular fitting 132. The sleeves are spaced apart from each other and are held to limited travel within the fitting 132 by

pins

141 and 142 which are secured to the round part 123 of the shifter rod, leaving the ends extending into the slots 139 and 140 formed in the sleeves to limit and control the movements thereof.

An expansible spring 143, constructed of lighter spring wire than the spring 121 which is associated with the plunger 116, is interposed between the sleeves and normally exerts a pressure or tension against the ends of the sleeves to maintain the same in the position shown in Fig. 15. The opposite ends of the spring exerts a pressure againstthe sleeve 133 and cap 133 and the sleeve 137 and the inner bored end 144 of the barrel-shaped fitting 132.

When movement is imparted to the wormscrew shaft 24, and the ear 126 is moved in the direction of the arrow and in contact with the dog 128, the light spring 143 is compressed as shown in Fig. 16, and as the shifter rod is moved further forward, the pin 141 moves against the sleeve 138 and cap 133, moving the shifter rod and tubular fitting 102 to the position shown in full lines in Fig. 15. When the shifting rod and tubular fitting is moved to the position shown in full lines, the rounded end of the plunger 113 is forced against one side of the double inclined plane and energy is stored in the spring 121 until the rounded end portion of the plunger reaches the apex 145 of the inclined plane. In the meantime the ends of the bolts 111 and 112 contact with the end margins of the slots 109 and 110 and impart a sliding movement to the sleeve 106.

When the rounded end of the plunger rides over the apex of the inclined plane, the movement of the shifter rod and its associated mechanism is accelerated by the energy stored in the springs 121 and 143, causing a quick and rapid throw of the shifter and its associated mechanism in the opposite direction, changing the direction of the rotation of the worm screw shaft 24 by an automatic mechanism, hereinafter described.

The same operation of the shifter rod and its associated mechanism takes place in reverse order when the worm screw shaft is rotated in the opposite direction and contact of the ear 126 is madewith the dog 127. The throw of the cylindrical member 102 in either direction is limited by

shoulders

146 and 147 which" contact and engage with the shouldered

portions

148 and 149 formed on the end of the plunger.

Means for rotating the worm screw shaft in opposite directions and means to permit the worm screw shaft to

idle Rocker arms

150 and 151 are mounted on the tubular member 21 and are arranged on each side of the ratchet wheel 39 in spaced relation to each other and are held in a pre-determined spaced relation to each other by a bolt 152 which has a roll r 153 journaled thereon as shown in Fig. 19. The rocker arm 151 is provided with two outwardly extending

bracket portions

154 and 155 spaced apart from each other. A bell crank, part of which is shown at 156, is mounted on a bolt 157 between the outwardly extending bracket portions. One part 158 of the bell crank extends along the outside of one of the outwardly extending bracket portions 154. The bell crank is held in place on the bolt 157 by a set screw 159.

To the part 158 of the bell, crank, an oiiset bracket member 160 is secured by a bolt 161 and the same is held against lateral movement by a pin 162. A plate 163 is provided with trunnion journals and pivotally supported at one end by the ofiset bracket 160 and the part 158 of the bell crank. A double-ended pawl 16 i is pivotally mounted on a bolt 165 between the rockerarms and is adapted to mesh periodically with the ratchet wheel on either sideoi the center portion thereof, depending on which direction it is desired to rotate the ratchet wheel in.

To yieldingly hold either end of the pawl in mesh with the teeth of the ratchet wheel on either side thereof, a depending bar 166 is provided, having an eye 167, and it is pivotally connected to a pin 168 which is in turn secured to the pawl 164. A spring 169 is interposed between the plate 163 and the eye 167 of the bar 166. Another spring 170 is interposed between the lower face of the plate 163 and the top of a nut 171 which is secured to the lower end of. the

bar 166.

When the bell crank is forced by the sliding sleeve to its inward throw, as shown in Fig. 19 in full lines, the portion 158 of the crank'forces the spring 169 in contact with the eye 167 of the bar 166 and thereby iorces one end of the double-. ended pawl to mesh with the ratchet wheel on one side thereof, which permits one end of the pawl to move the ratchet wheel in one direction and simultaneously move the worm screw shaft.

When it is desired to operate the ratchet wheel in the opposite direction, the sliding sleeve, ,as shown in position in Figs. 19 and 29 in dotted lines, when moved by the bell crank, compresses the spring 170 and exerts a" pressure on the nut 151, forcing the otherend of the pawl to mesh with the teeth on the opposite side of theratchet wheel, thereby rotating the ratchet wheel in the opposite direction. When the part 158 of the bell crank is moved either up or down, the pointed end 172 of a spring pressed pin 173 is forced to engage the depressions 174 or 175 in the part 158 of the bell crank and yieldingly holds the pawl in mesh with the teeth of the ratchet wheel on either side. The end 172 and the spring pressed pin 173 yieldingly contacts with the depressions 174 or 175 as the bell crank is moved on its inward or outward throw by the shifter rod.

To permit the ratchet wheel and worm screw upon which it is mounted to idle, a boss 176 is formed on the rocker arm 151 projecting out wardly, and an aperture is provided in the center portion thereof. A shouldered and pointed pin 177 is fitted within the aperture and a spring 178 is fitted to the reduced portion of the pin. One end of the spring bears against the shouldered portion .of the pin and its opposite end bears against the inner portion of a cap 179 which is threadably connected to the boss 176.

An annular boss 180 is made integral with the cap and is slotted at 181. A wheel handle 182 is connected to the reduced portion of the pin 177 and is provided with tongue members 183 and 184.-

When it is desired to permit the pawl to idle, the handle is turned to permit the tongue members thereof to register with the slots formed in the annular boss formed on the cap, and this allows the end of the pin 177 to yieldingly contact with the countersunk portion 185 of the end of the annular boss 180. The tension of the spring is exerted upon the pin and at the same time upon the countersunk portion, yieldingly holding the pawl in neutral position and out of mesh with the teeth on either side of the ratchet wheel, thereby permitting the worm screw shaft and its associated mechanism to idle.

Means for applying power to the automatic polisher 7 Power is applied and connected to the automatic polisher from the two high rolling mill without the use of a motor or the like but from the wabble of one of the rolls and is transmitted through the following instrumentalities:

To the wabble of the roll, a member 187 is attached and held in place thereon by set screws 188. To this member a crank pin 189 is attached off center of the roll bearing. To transmit power from the crank pin 189, a safety connecting rod is employed and attached to the polisher and is constructed as follows:

. A stub shaft 190 is provided with the U-shaped bearing 191 at one end, and it is adapted to fit over the journal roller 153 and is held in place on the roller by a spring 192 which is provided with an inwardly turned tongue 193 at its lower end to contact with and exert a tension against the roller to prevent same from slipping oh the roller without releasing the tension of the spring A depending looped spring member 194,, having one end 195 inserted in an aperture formed in the end ofthe stub shaft 190 and its opposite end 196 inserted in an aperture formed in a shaft 197, is provided. The shaft 197 has an annular ring member 198 attached to its free end, and spaced apart spring bars 199 and 200 are secured to the ring member 198 by the set screws 201. The free ends of the spring bars 199 and 290 are provided with

bearings

202 and 203 to fit over the crank pin 189.

For securing the spring members 199 and 209 tothe crank pin 189, easily, rapidly, and conveniently, the ends are extended and flared and when pressed against the crank pin, the bars are pressed open under tension and rebound back automatically to normally position and engage the crank In the construction of a shaft of the character just described, it will be noted that the automatic polisher can be quickly connected (or disconnected) from the two high rolling mill for power operation, while at the same time the interposition of the looped spring between the parts of the connecting rod provides means for the connecting rod to yield to accommodate any vibration or irregular movement oi the rolls or housings. It further provides means for relieving any strain between the mechanism of the polisher and the wobble, so that in the event of extraordinary strain, vibration, or the like, the same will be abscr' ed by the yielding connecting rod.

Attention is called to the fact that portions of the trunnion .pin 59 are grooved or cut away, as shown at 29 1 and 205, to weaken same so that if any extraordinary strain is exerted on the polisher, such as breaking of the roll or the like, the pin will break allow the mechanism to fall in the pit of e roll without breaking or injuring the mechanism.

ihe above statements describe in detail the lstruction and assembling of the elements of the automatic polisher .sed to attain the objects and results herein specified or incident thereto.

The operation of the automatic polisher in brief is as follows:

lt-love nt is imparted to the polisher through the n of the safety crank shaft which is connected to the crank pin, which is mounted upon a member attached to the wabble and is removably secured thereto. The opposite end is conn cted to the roller 153 whichis secured between the rocker Through the crank shaft, a rocking movement is imparted to the rocker arms, which carry a double-ended pawl, which is pi otally attached to mesh with either side of ratchet vheel to impart movement thereto in er direction. The ratchet wheel is mounted upon and connected to a worm screw shaft which es a worm screw nut secured to the traveland which is adapted to impart movein either direction to the traveling carriage.

vable sleeve, mounted upon the tubuis operated by a cylindrical member ed apart arms provided thereon, and otally connected to the tubular mem- The shifter rod is connected to the tubular oer at one end and its opposite end is sup- The carriage is provided when the carriage is moved in either diion in contact with either of the dogs, the

r is operated to throw the pivoted cylindric ober in either direction. These dogs can adjusted along shifting rod to control the \ClllSllt of the carriage to travel the full length the face of the roll or the face of a part i ecf.

The cylindrical member is also provided with oich enter slots in the 'projectingportions' and the bolts move same in either l brought in contact with the end slots. One of the rocker arms has u-ounted thereon, one end 207 of the groove 2% formed in the sleeve g pressed means are employed to actuate bio-ended pawl to mesh with the ratchet o. the forward or rearward movement of arm s. Means are employed to yieldthereof, the shifter rod is moved, the spring 121 in the member 102 is compressed and in the further movement of the shifter red, the cylindrical member, in which the spring plunger is mounted, the plunger is forced to travel up one side of a double inclined plane to its apex, and when it reaches the apex and starts down on the other side, the energy stored in the springs 121 and 143 accelerates the movement of the shifter rod and its associated mechanism and reverses the engagement of the dual pawl and travel of the ratchet wheel, starting it in the opposite direction.

The beam that carries the stone is detachably' supported by the arm of the traveling carriage and can be separated therefrom at any time desired. The tilting beam, which is mounted on the carriage, carries a journal adjacent to its end on which an emery stone is mounted, and means are provided to turn the stone so that different or fres portions of the face of the stone can be pressed against the face of the roll for polishing same.

Resilient means are al o provided on the tilting beam to increase, or decrease the pressure of the stone against the face of the roll when desired.

It will be observed that the polisher is so located and positioned on the rolling mill housing hat it can be operated continuously without interfering with the operation of the rolling mill or the men working on-the mill.

It will also be noted that by adjusting the dogs on the shifter rod, the polishing stone can be moved to polish across the entire surface of the roll, or a pre-determined portion thereof, actuating the automatic mechanism to change the di rection and distance of the travel of the carriage automatically.

While the automatic pclisher, as shown and described herein, is applied to the lower roll of a 3 a deviating from the spirit of the invention or terially departing from the principle or construction of the invention as shown in the drawings; hence, it is not intended to limit the invention to the embodiment shown in the drawings.

I claim: 4

1. In an automatic polisher for rolls, a supporting member, a carriage mounted for movement in either direction on the supporting member, means to impart movement thereto, means to change the direction of the movement of the carriage, means for disengaging said change of dir ction means from said movement imparting means to thereby permit said latter means to means to removably attach the supporting means to the housings of the roll and a yielding connect-. ing rod connected to the operating mechanism of the polish-er and to the wabble of the roll.

2. In an automatic polisher for rolls, a tubular supporting member, a movable carriage mounted on the supporting member carrying a worm screw nut, a worm screw shaft mounted on the tubular supporting member and engaging the worm screw nut to impart movement to the carriage, an inclined plane mounted on the supporting me nber, a shifter rod, yielding means operated by the shifter rod to ride upon theinclined plane and store energy to accelerate the throw in either direction of the shifter rod and means for operating the shifter rod to change the rotation of the worm screw shaft.

3. In anautomatic polisher for rolls, a tubular supporting member, a movable carriage mounted on the supporting member carrying a worm screw nut, a worm sc 'ew shaft mounted on the tubular supporting member and engaging the worm screw nut to impart movement to the carriage, a yielding shifter rod adapted to store energy, means for operating the shifter rod to change the rotation of the worm screw shaft and means to permit the Worm screw shaft and its associated mechanism to idle.

l. In an automatic polisher for rolls, comprising in combination, a supporting member, a carriage slidably mounted thereon, an arm provided on the carriage having its end down-turned to form a hook, a beam pivoted to the hook and carrying an abrasive stone for polishing, means to impart movement to the carriage, a shifter rod and means operated by the carriage and shifter rod to change the direction of movement of the carriage.

5. In an automatic polisher for rolls, comprising in combination, a supporting member, a carriage slidably mounted thereon, an arm provided on the carriage having its end down-turned to form a hook, a beam pivoted, to the hook and carrying an abrasive stone for polishing, means to impart movement to the carriage, shifter rod, means operated by the carriage and shifter rod to change the direction of movement of the carriage and means to pivot the beam to exert or release the pressure of the stone upon the roll.

6. In an automatic polisher for rolls, comprising in combination, a supporting member, a carriage slidably mounted thereon, an arm provided on the carriage having its. end down-turned to form a hook, a beam pivoted to the hook and carrying an abrasive stone for polishing, means to impart movement to the carriage, a shifter rod, means operated by the carriage and shifter rod to change the direction of movement of the carriage and means to vary the travel of the carriage in either direction.

7. In an automatic polisher for rolls, comprising in combination, a supportin member, a carriage slidably mounted thereon, an arm provided on the carriage having its end down-turned to form a book, a beam pivoted to the hook and carrying an abrasive stone for polishing, means to impart movement to the carriage, a shifter rod, means operated by the carriage and shifter rod to change the direction of movement of the carriage and means to reinovably mount the polisher on the housings of the rolls.

8. In an automatic polisher for rolls, a supporting member, a carriage mounted for reciprocation thereon, an arm, a polishing element carried by the arm, an element projecting from the carriage and pivotally supporting the arm, means for slidably supporting the free end of the element, a spring forming an extension of the arm, and adjusting means cooperating with the spring for adjusting the arm or its pivotal support.

9. In an automatic polisher for rolls, a carriage, means for imparting reciprocal movement to the carriage, said means being adjustable to vary the extent of carriage movement will, a radial arm projecting from the carriage, means for guidin the free end of the arm, a beam pivotallyrnounted in the free end of the arm, a polishing element carried by one end of the beam, and adjusting means for the opposite end of the beam, said adjusting means being capable of yielding under pressure on the polishing element.

14). In an automatic polisher forrolls, a supporting member, a carriage mounted for reciprocation thereon, a gear for operating the carriage, automatically-compensating means actuated by the rolls for operating the gear, means controlled by carriage movement for controlling the direction of movement of said gear, a polisher-carrying arm removably supported by the carriage and including a spring section, and means intermediate the spring section and carriage for manually adjusting the arm relative to the carriage.

11. An automatic polisher for rolls, including a carriage mounted for reciprocal travel, driving means for the carriage operated by one of the rolls and including an automatically compensating member, an arm having a slip connection with the car'iage for pivotally supporting said arm, a leaf spring forming part of said arm, a manually adjustable means carried by said leaf spring and having bearing on the carriage, a polishing element carried by the arm, and means carried by the arm for adjusting the polishing element independently of the arm.

12. In a polishing rig for sheet mill rolls, sup ports removably mounted on the mill and presenting guide bars; stone carrying holders slidably mounted on the bars; and ratchet means operatively connected to one of the rolls to move said holders continuously back and forth along the rolls.

13. In a polishing rig for sheet mill rolls, roll polishing stones; guides supporting the stones to reciprocate along the Working faces of the rolls; ratchet mechanism including a lever and a cam on one of the roll wabbles; and means connecting the ratchet mechanism to impart a step-by-step motion to the stones.

1%. In a polishing apparatus for rolling mill rolls, the combination of movable means for supporting a polishing stone movable along the face of a roll, non-rotatable, slotted tubular means upon which said stone carrying means is slidably mounted and into which a portion thereof pro jects, a screw rotatable within said tubular memher and in threaded engagement with the said portion of said stone carrying means, and means connected to one of the rolls for rotating said screw in opposite directions.

15. In a polishing apparatus for rolling mill rolls, the combination of a supporting bar, a stone holder slidably mounted on said bar, means connected to one of the rolls to move said holder back and forth along the rolls, said means including a double ratchet and adjustable stop means disposed in the path of movement of said holder and effective when engaged by said holder to reverse the directional effectiveness of said ratchet.

16. In an automatic polisher for rolls, in combination, supporting means, a carriage slidably mounted thereon, means adapted to move said carriage along said supporting means, and means operatively connecting said moving means with the wabble of a roll comprising a link, said link including spring means for effecting a slip connection with a'stud associated with said wabble.

17. In an automatic polisher for rolls, in combination, supporting means a carriage slidably mounted thereon, means adapted to move said carriage along said supporting means, an arm mounted on said carliage, an abrasive carrying element pivotally connected to the free end of said arm, a second supporting means parallel to said first supporting means slidably engaging said holder continuously back and forth along the rolls.

19. In a polishing rig for sheet mill rolls, a roll polishing stone; guides supporting the stone to reciprocate along the working face of one of the rolls; ratchet-mechanism including a lever and a cam on one of the roll Wabbles; and means connecting the ratchet mechanism to impart a step-by-step motion to the stone.

WILLIAM W. LEACH.