US1879962A - Automatic wire screen guide for paper making machines - Google Patents

Description

Sept. 27, 1932. w. J. TREMPE 1,879,962

AUTOMATIC WIRE SCREEN GUIDE FOR PAPER MAKING MACHINES Filed July 14. 1930 2 Sheets-Sheet 1 24 33 o 4 40 k 42 8 r 29' f 50 H I B g l 1 5: I 8 20 43 Z I 3 I V Z6."- g I f fii/vezaivr 23 FEAQ 2 0 1 8 il illliihlfiezlzpe .B a M :2. flfi 01 z Sept. 27, 1932. w. J. TREMPE 1,879,962

AUTOMATIC WIRE SCREEN GUIDE FOR PAPER MAKING MACHINES Filed July 14, 1950 2 Sheets-Sheet 2 W v v 36 39 046 I a 46 40 M1? 1%,]? 1} I; I 5 H- I I I I I l finjnivar WaIIZZIPeIIQ Patented Sept. 27, 1932 UNITED STATES Pars are

WILLIAM J. TREMPE, OF NORTH BILLERIGA, MASSACHUSETTS AUTOMATIC WIRE SCREEN GUEDE FOR PAPER MAKING MACHINES Application filed July 14, 1930. Serial No. 467,792.

lates to improved features of construction which render the automatic control means more practical by increasing the sensitive ness of the control but yet permitting a more rugged construction of theparts. lVhile it is not new to provide a means for automatically guiding and controlling a traveling wire mesh screen in a paper making machine, such earlier types of machines have had various limitations and are open to various objections in use. In applying the automatic mechanism to machines for controlling the course or path of the wire mesh screens, the application of the automatic control mechanism depends upon whether or not the automatic control device is to be applied to what is known in the trade as a right hand or a left hand machine. Heretofore in the prior art, it has necessitated two distinct automatic control mechanisms for use on a right hand and left hand machine respectively, so that they were not interchangeable.

One of the objects of the present invention is to provide. an automatic device so constructed that by a slight change in assembly, the same part of the device may be used interchangeably for mounting on either a right hand or left hand machine.

A further object of the present invention is to provide an automatic control mechanism for the wire mesh screen which is susceptible to a wider range of adjustment under various conditions of use, and upon various types of machines.

In machines heretofore employed, where what is known in the trade as a guiding pan has been employed to contact with the edge of the traveling wire mesh screen, the guiding element has been detachably fixed to an arm by rivets or other suitable means, so that in certain relative positions of the guiding pan and the wire mesh screen, the screen frequently is damaged by engagement with the projecting securing means. As the wire mesh screens on the paper machines are delicate and are very expensive, the likelihood of damage and injury to the controlling pans heretofore used, constitute a serious defect and objection.

A further object of the present invention 55 is to provide a controlling pan which will overcome the objections above referred to in the machines of the prior art and produce a controlling pan element which will minimize, if not eliminate, the possibility of injuring the delicate and expensive wire screen mesh belts, particularly under any unusual or abnormal conditions when there has been an abnormal movement of shifting in the course or path of the wire screen. 4

One preferred selected embodiment of the invention is shown in the accompanying drawings for purposes of illustration.

In the accompanying drawings:

Fig. 1 is a fragmentary end view showing 7 i one end of a guide roller over which the wire screen passes and also showing a roll positioning mechanism and the automatic wire screen guide mechanism in control position on a right hand machine.

Fig. 2 is a side view showing the automatic wire guide mechanism in controlling and guiding relation relative to the wire screen passing over the roll.

Fig. 3 is a top plan of the bracket which normally supports the operating mechanism of the automatic wire screen guide showing the position the bracket would occupy in a right hand machine.

Fig. 3a is an enlargedfragmentary View showing the post detachably mounted in the bracket. 7

Fig. 4 is a view of the same bracket illustrated in Fig. 3, but reversed to show the position the bracket would assume for application to a left hand machine. The position of the bracket illustrated in Fig. 1, in the left hand machine the wire would be traveling in adirection opposite to that of the full line arrow.

Fig. 5 is an end view of the roller and the roll positioning or shifting mechanism but differing from Fig. 1 in showing the relative position of the pawlyoke or saddle, and the ratchet wheel with the roller advanced half a revolution from that indicated in Fig. 1.

Fig. 6 is a side view of the automatic Wire screen guide mechanism similar to Fig. 2 but indicating a difierent position of the WJIG screen guide relative to the roller over which it passes and also making a corresponding Iii) change in the position of the controlling pan and the mechanism actuated thereby.

Fig. 7 is a view taken on the line 77 of Fig. 6.

Fig. 8 is a fragmentary view of the roll positioning or shifting mechanism showing the engagement of a pawl on one side of the pawl yoke or saddle, engaging a ratchet tooth on one side of the ratchet wheel or. gear which shifts one end of the guiding roller to correct or compensate for the shifting of the wire screen from a normal position;

Fig. 9 is a section of the guiding control pan integral with the arm. I

10 is a diagrammatic'view showing the guiding roller with the-wire screen passing thereover and/indicating in an exaggerated form the manner in which one end of sitioning or shifting mechanism, to which the automatic wire screen guide constituting thesubject of the present invention may be applied. It is understood that the present invention may be used in combination with and applied to other types of roll shifting mechanism, which other types are well-known in the art. 7

The roll shifting or positioning mechanism illustrated in Figs. 1, 5 and 8 comprises a stationary frame 1 which is mounted on the paper making machine (notshown) inany suitable manner.

The guide roller 2 is supported on a slidable guide or block 3 through a. si'iitab'le racket or standard at which supports a. bearing block or standard 5 at one end of the roller 2, in a manner well-known in the art. The

guide or sliding block 3 is movable on a guide or rail 6 formed integral with the frame 1. The relative shifting movement between the frame 1 and the roller 2, is effected through a pawl and ratchet mechanism. As shown, a ratchet wheel 7 is threaded upon a screw rod 8 aflixed in the frame 1. Through aforked frame, (not shown) the shifting of the ratchet wheel in one directionor the other upon the screw rod will shift the slidable guide 3 in a corresponding direction, so that one end of the roller 2 will be likewise moved.

. The showing of this form, although it constitutes no part of the present invention has been illustrated for purposes of diagrammatic representation. The opposite faces or sides of the ratchet wheel 7 are provided on one side with ratchet teeth 9 extending in one direction, and the other side or face of the ratchet wheel are provided with ratchet teeth 10 extending in the opposite direction to the teeth 9 so that by movement of the pawl saddleor yoke 11, either to the right or left, thepawls 12 or 13 will engage the ratchet teeth 9 or 10 respectively and effect rotation of the ratchet wheel 7 whichwill in turn result in movementof the ratchet wheel 7 either to the right or left which will effect a corresponding-movement of the end bearing for the roller 2. The vertical reciprocation of,

over the roller 2 initsnormal course or path,

the pawl, yoke or saddle 11 is so controlled and guided by a link 1? controlled by the automatic wire screen guide mechanism constituting the subject of the present invention and hereinafter to be more fully described, that the pawls 12v and 13 in their vertical reciprocatory movement do not engage either of the ratchet teeth 9 and-10, as in the actual machine, there is sufiicient clearance between the pawls and the ratchet teeth to permit-this vertical reciprocatory movement. However, if the wire screen 16jfor any reason should shift from its normal path the automatic screen guide mechanismactuates the pawl yoke 11 to effect what is known in thetrade as a dogging movement which isefi'ected by engagement ofthe pawl and the ratchet teeth of the wheel 7 in the proper direction to ob: tain a shifting or corrective movement of the roller 2 in order to compensate for the shifting of the travel of-z-the wire screen guide 16 from its normal path, Nhile the roll posit tioningand shifting mechanism. above de- M scribed constitutes in detail no part of the presentinvention other than ,as an element in the generalcombination, thedescription in such detailas has been given, is thought to be helpful in showing the necessity for the positive and sensitive control by the automatic screen guide which determines and controls the performance of the roll positioning and shifting mechanism. In order-that the required positiveness and sensitiveness of the control in the automatic screen guide may be obtained, the construction and arrangement of the parts of the mechanism constituting the automatic wire screen control means must be of substantial, and rugged construction to stand up under the conditions of use for a period of time and to also permit adjustment to varying conditions and also adjustment for wearing of parts. In view'of the very slight movement necesary to actuate the roll posi- 3 CAD tioning mechanism, it is essential that the construction and arrangement of parts in the automatic screen guide be such that there is little if any lost motion.

The construct-ion of the preferred selec tive embodiment of the automatic wire screen guide constituting the subject of the present invention, is perhaps best illustrated in Figs. 1, 2, 6 and 7,. As there shown, a bracket indicated generally as 18 is provided. The bracket is provided with a base 19 adapted to be secured to the machine, and with an arm 20 offset from the'base bya connecting portion 21.

The arm 20 is provided with a slot 22 to permit adjustment of parts in a manner hereinafter to be more fully set forth. A. lug 23 is formed integral with the bracket, said lug being provided with an aperture adapted to receive the post 2% removably mounted thereon.

Fig. 3a is an enlarged fragmentary View showing more clearly the manner of immovably or detachably mounting the post in the bracket. As shown, one end of the post is threaded, the threaded end extending through the aperture in the lug 23. The post is retained in position by suitable locking means such as the nuts 2526 arranged one on each side of the lug.

It is understood that other suitable and well-known equivalent means may be employed for detachably or removably mounting the post. One of the distinct advantages in providing for the removable mounting of the post, is that such a feature of construction makes possible the use of a single bracket upon either a right hand or left hand machine. All that is required in order to make the necessary change from a right hand machine or vice versa is to remove the operating mechanism for the automatic Wire screen guide (hereinafter to be more fully described) from the bracket and to remove the post 2d from the bracket and to then reverse the bracket and reposition the post so that it projects from the opposite side of the bracket after which the automatic guide mechanism may be again assembled.

As shown, the automatic wire screen guide mechanism is mounted on a frame comprising the bracket illustrated inFig. 3 designated generally as 27, and an adjustable arm 28 for pivotally supporting at one end a pan supporting link 29. .The arm 28 is provided with a slot 30 which cooperates with the slot 22 to permit adjustment of the arms 20 and 28 in different relative positions to permit the pivotally supported and weighted pan arm 31 to be properly positioned relative to the traveling wire screen 16. The two arms 28 and 20 maybe clamped in properly adjusted relation in any suitable manner such for er.- ample as by the headed bolt 32 which passes through the slots 22 and 30 and retained in the guiding traveling re screen 16, (after it has passedj 34 carried in the endof the arm 28. Th pan arm 31 is pivotallysupported at the upper end of the link 29 so that the point of pivotal support of the pan arm is between, pan 35 which contacts wi h the over the roller 2), and the lower weighted end 36 of the pan arm so that the weighted portion of the arm will tend to keep the pan in operative and guiding relation relative to the traveling wire screen. By such an ar- 1Q] rangement, if there is anysudden amplified shifting movement of the Wire screen, the pan and the supporting arm Wlll be shifted actuated by the Wire screen, but the wire screen will not be injured as would be the L case if the pan 35 were positively fixed upon the link 29. The dotted line position ofthe pivotally supported and weighted pan arm 81 illustrates an amplified movement of such on sup-porting of the fire screen. The movements of the pan arm 31 is transmitted to the link 17 which controls the roll shif ing or positionng inc-ch. m, through the link 29, to the ink 37 through a universal joint connection, and from said link-37 to said link 17 through a bell crank 38 which is pivotally supported on the pos' 2 A suitable universal joint connection is interposed between one end of the link 37 and one arm 39 of the bell crank, and a suitable universal oint connecinterposed between one end of the link 1'? and the other arm at) of the bell crank. The univ -rral joint connection at the ends of the arms 39 and 40 of the bell crank, is-

shown as comprising a plurality of blocks 41 l2, each block being provided With a stud 13-44 respectively. The stud 43 passes through one of the apertures in the end of the arm 4L0 of the bell crank and is secured in position by a cotter pin or other suitable means. The stud 44. on block 42 passes through an aperture formed in the block all, and the stud 44 is secured in proper relative position by acotter pin or other suitable means. By providing a number of apertures 45 in the arm 40 of the bell crank, a wider adjustment in the sensitiveness of the control mechanism and the time period of the dogging action, is obtained, as the sensitiveness in the control, and the effective dogging action of the actuating paWls 12-13 on the yoke 11 may be increased'or diminished by movement. of the stud e3 either farther from or nearer to the point of pivotal support of the bell crank upon the post 24. The end of the link 17 is adjustably fixed in the block 42 by a clamping wing nut 46; the adjustability of the link facilitates the initial setting of the pawls in the yoke 11, and also arm due to a sudden shiftfacilitates the adjustability of the automatic screen control mechanism to varying machines under varying conditions of use. The other end of the link 17 is connected to the pawl carrying yoke 11 so that when the wire 11 will be lateraliy shifted to the right or left so that one vof the pawls will engage the teeth on the corresponding side to obtain a dogging or pawl and ratchet effect which will continue upon the vertical reciprocatory movement of the yoke 11, until the toothed ratchet wheel 7 has been shifted a suiiicient distance upon the screw rod 8 to compensate for the deviation of the wire screen from its normal path, and until the wheel'7 has been brought to a position wherein upon the reciprocation of the yoke 11 the pawl carried thereby is no longer in contact with the ratchet teeth. If the movement of the wire screen is to the right (looking in the direc tion of the arrow, in 1) the movable end of the roller 1 is shifted to the right (loolo ing at the end of roller, in Fig. l) to restore the wire screen to normal and vice versa.

In order to provide for a feature of initial adjustability in accommodating the mechanism to a screen of given width, and in bringing the pan arm to a proper position to exert a suite. le pressure, one end of the link 37 is made adjustable relative to the universal joint connection in the arm 39 of the bell crank.

The link 37 is retained in one of the blocks 47 of the universal joint connection by a clamping screw 48 in much the same manner as is the link 17 retained in the block 42 as above described.

The connection between the other end of link 37 and the lower end of the link 29 should he of such a type as will permit free rotation of the link 29 in a vertical plane, and a free and unimpaired movement of the link 37 in a substantially horizontal plane.

As shown in Figs. 2 and 6, the universal joint connection comprises a block 48 having in one end a slot in a vertical plane adapted to'receive a tongue on the lower end of the link 29 said parts being pivotally connected by a pin 49; the other end of said block 48 is provided with a slotted portion in a substantially horizontal planerand is adapted to receive a tongue portion 50 which-is pivotally connected with the block 48 by a pin or other suitable manner.

The present invention provides an automatic wire screen control mechanism which is of simple and rugged construction andprovides for a wide range of adjustment to varyyet positive action of the parts, and eliminates any possible lost motion, which lost motion would be fatal to accurate and sensitive control.

Fig. is 'a diagrammatic view which" has been produced merely to show the general principle employed in shifting one end only of the guiding roller for the screen in order to correct and compensate for the departure of the wire screen from its normal path of travel.

Fig. 8 is a diagrammatic View showing the link 17 shifted to a position so that the pawl 12 in its vertical reciprocation is in operative relation with the teeth 9. The tilting action of the yoke is exaggerated over the position actuallyassumed in operation.

9 is an enlar ed view showing the pan arm 31 and the guiding pan 85 in section. The guiding pan is formed integral with the arm 31 so as to eliminate the necessity for any rivets or connecting means, which in the prior art frequently came in contact with the traveling wire screen and injured the same.

Various modifications in the construction and operation of my device may obviously be resorted to if within thespirit and, scope of my invention without departing from the limits of the appended claims.

What I therefore claim and desire to secure by Letters Patent is: r 1. An automatic control mechanism for wire mesh screens on a paper making machine including a guide roller movable at one end and a wire mesh screen guided thereover, a roller positioning mechanism for shifting'one end of the guiding roll to control the path or course of the wire mesh screen passing thereover, an automatic control mechanism for actuating the roll positioning mechanism in accordance with variations in the travel of the wire screen mesh from its normal course, said control mechanism including a bracket, an arm pivotally supported between its ends on said bracket, another weight balanced pan arm pivotally supported between its ends upon one end of said first named arm, the upper end of the pan arm being in contact with the edge of they traveling screen and the lower end of the pan arm being weighted, the point of pivotal support of said pan arm being intermediate its ends and between the upper pan portion of the arm and the weighted portion.

2. An automatic control mechanism for wire mesh screens on a paper making machine including a guide roller movable at one end and a wire mesh screen guided thereover, a

roller positioning mechanism for shifting one I:

end of the guiding roll to control the path or course of the wire mesh screen passing thereover, an automatic control mechanism for actuating the roll positioning mechanism mediate its ends on said upstanding arm, a weight controlled guiding pan pivotally mounted on said'second arm andadapted to be actuated by the wire mesh screen upon deviation from itsnormal path of travel and 15 V- nechanism actuated by the movement of said guiding pan and in terpcsed between said pan and said roll positioning mechanism, whereby the force effective upon the roll positioning mechanism is indirectly transmitted through an intermediate pivoted weight controlled arm. a

3. An automatic control mechanism for wiremesh screens on a paper making machine including a guide roller movable at one end .and a wire mesh screen guided thereover, a

roller positioning mechanism for shifting one end of the guiding roll to control the path or course of the wire mesh screen passing thereover, an automatic control mechanism for actuating the roll positioning mechanism in accordance with variationsin the travel of the wire screen mesh from its normal course, said control mechanism including means *permittin the use of said control mechanism on either a right hand or left hand machine, said means including a bracket an upstanding arm on said bracket, an arm pivotally supported between its ends on the upper end of said upstanding arm, a weight controlled guiding pan arm pivotally mounted on said second named arm which is pivotally supported between its ends and adapted to be actuated by the wire mesh screen upon deviation from its normal path of travel the pivotal connection of said pan arm being between the weighted end and the pan portion contacting with the screen and mechanism actuated by the movement of said guiding pan and interposed between said pan and said roll positioning mechanism.

in automatic control mechanism for wire mesh screens on paper making machines inc uding a guide roller movable at one end and a wire mesh screen guided thereover, a

roller positioning mechanism for shifting one end of the guiding roll to control the path or course of the wire mesh screen passing thereover, an automatic control mechanism for actuating the roll positioning mechanism in accordance with variations in the travel of the wire screen mesh from its normal course, said control mechanism including means permitting the use of said control mechanism on either a right hand or left hand machine, said means including a bracket and bell crank reits normal course,

movably pivoted on said bracket, a link connecting said positioning mechanism and one arm of said bell crank and a universal. joint connection between one end of said link and said arm.

5. An automatic control mechanism for wire mesh screens on paper making machines includin a guide roller movable at one end and a wire mesh screen guided thei'eover, a roller positioning mechanism for shifting one end of the guiding roll to control the path or course of the wire mesh screen passing thereover, an automatic control mechanism for act iatingthe rollpositioning mechanism in accordance with variations in the travel of the wire screen mesh from its normal course, said control mechanism including means permittmg the use of said control mechanism on either a right hand or left hand niachine,

said means including a bracket and bell crank removably pivoted on said bracket, an arm pivotallymounted between its ends on said bracket, a weight balanced pan arm pivotally mounted onsaid first arm the support being between the pan portion contacting with the screen and the weighted por-' tion of the arm, a link connecting said positioning mechanism and one arm of said bell crank and a link connecting the other arm of the bell crank with. the said arm which is pivotally mounted between its ends on said --bracket.

6. An automatic control mechanism for wire mesh screens on paper making machines at one end including a guide roller movable and a wire mesh screen guided thereover, a roller positioning mechanism for shifting-one end of the guiding roll to control the path or course of the wire mesh screen passing thereover, an-automatic control mechanism point of pivotal for actuatingthe roll positioning mechanismin accordance with variations in the travel of the wire screen mesli from its normal course, said control mechanism including a bracket, an arm pivotally supported between its ends onsaid'bracket, a weight balanced pan arm pivotally mounted onsaid first arm, the point :of pivotal support being between the pan portion of the arni'contacting with thescreen and the weighted end on said bracket,

pivotally supported arm, a link connecting said positioning mechanism and the other of the panarm and 'bell crank removably v pivoted a link connecting one arm of the bell crank and said first named i arm of said bell crank and a-universal joint 1 connection between one end of said link and Silld'tl'll'l, and a means for adjustably secur-' ing one end of said link in the universal joint.

7 An automatic control mechanism for wire mesh-screens on paper making machines ll'lClllCllllgfl guide roller movable at one end and a wire mesh screenguided thereover, a; roller positioning mechanism for shifting one end of tliezguiding roll to control the path or e course or"- the wire meshscreen passing there-.

over, an automatic control mechanism for actuating theqroll positioning. mechanism 1n accordance with variations in the travel of 5 the wire screen mesh from its normal course,

said control mechanism including means permitting the use or said control mechanism on either a r 'ht hand or leIt hand machine,

said means including a bracketand bell crank removably pivoted on said bracket, a

link connecting said positioning mechanism and one arm ofsaid bell crank and a universaljoint connection between one end of said link and said arm, and a means to adust the sensitiveness of the control b var ing the time period during which the automatic control mechanism is efi'ectivefor any given departure of the wire'screen from its normal path of movement.

8. An automatic control 'mechanism for wire mesh screens on paper making machines including a guide' roller movable at one end and a wire mesh screen guided th-ereover, a roller positioning mechanism. for shifting 13 one end of the guiding roll to control the path or course of the wire mesh screen passing the'reover, an automatic control mechanism for actuating. the roll positioning mechanism in accordance with variations in the travel :anof the'wire screen mesh from its normal course, said control mechanism including means permitting the use of said "control mechanism on either a right hand or left hand machine, said means including a bracket and bell crank removably pivoted on said bracket,

a link connecting said positioning mechanism and one arm of said bell crank, a universal joint connection between one end of said link 1 and said arm, and means for varying the throw of said link for any'given departure course of the wire mesh screen passing thereover, an automatic control mechanism for actuating the roll posltionmg m-echanlsm in accordance with variatlons 1n the travel of mitting the use of said control mechanism on' either a right hand or left hand machine, said means including a bracket and bell crank removably pivoted on said bracket, a link 7 1 connecting said positioning mechanism and one arm of said bell crank, a universal joint connection between one end of said llnk and sald arm, and means for varying the throw of said link for any given departure of movement of said wirescreen from its normal'path the wire screen mesh from its normal course, said control mechanlsm including means perwhereby the sensitiveness of control may be regulated, said means including a plurality of apertures in one arm of the bell crank, permitting the mounting of the stud of the universal joint at varying distances from the point of pivotal support of said arm.

10. An automatic control mechanism for wire mesh screens on paper making machines including a guide roller movable at one end and a wire mesh screen guided thereover a roller positioning mechanism for shifting one end of the guiding roll to control the pathor course of the wire mesh screen passing there- 'over, an automatic control mechanism for actuatin the roll ositionin mechanism in accordance with variations in the travel of the wire screen mesh from its normal course, said control mechanism including a weight balanced pan arm adapted to engage the traveling edge of the screen, a bracket, an arm pivotally-supported between its ends on the bracket, a pivotal support on said last named arm for said weight balanced pan, said point ofpivotal support being between the point at which the pan contacts with the wirev screen and the weight, whereby upon abnormal shlfting of the screen to one s;de a yielding pressure 1s exerted against the traveling edge of the screen by the pan arm,

which pressure is determined only by the effect of the weight of the arm which has been deflected so that the edge of the screen is not injured.

In testimony whereof I aflix my signature.

1 YVILLIAM J. TREMPE.

Images