US2178231A

US2178231A - Guider for cloth

Info

Publication number: US2178231A
Application number: US157258A
Authority: US
Inventors: Hetherington Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-05-07
Filing date: 1937-08-04
Publication date: 1939-10-31
Anticipated expiration: 1956-10-31

Description

Oct. 3l, 1939. R. HETHEINGTON GUIDER FOR CLOTH Original Filed May 7, 1956 '7 Sheets-Sheet 1 Oct. 31, 1939. R, HETHERINGTQN 2,178,231

GUIDER FOR CLOTH original Filed May 7, 195e 7 sheets-sheet 2 M zz 1225 [44H1 55 52 54 Oct. `31, 1939. R. HETHERINGTON 2,178,231

GUIDER FOR CLOTH Original Filed May '7, 1936 7 Sheets-Sheet 3 Oct. 31, 1939. R. HETHERINGTON GUIDER FOR CLO TH original Filed May 7, 193e 7 sheets-sheet 4 Oct. 31, 1939. R. Hl-:THERINGTON GUIDER FOR CLOTH Original Filed May '7, 1936 7 Sheets-Sheet 5 Oct. 3l, 1939. R. HETHERINGTON 2,178.231

GUIDER FOR CLOTH Original Filed May 7, 1936 7 Sheets-Sheet 6 Oct. 31, 1939. R. Hx-:THl-:RINGTON GUIDER FOR CLOTH Original Filed May 7, 1936 7 Sheets-Sheet 7 fig- Patented Oct. 31, 1939 Originalapplication May 7, 1936, Serial No. 78,436. Divided and this application August 4, 1937,

Serial No. 157,258 n Claims. (Cl. 26-66) v The invention relates to cloth guiders of a wellknowntype in which pairs of rollsare placed with their axes diagonal to the cloth length at vopposite sides of the cloth to hold the cloth betweenthe rolls of each pair, and the cloth is brought out to its full width position at either or both sides by tightening the rolls of one pair or of both pairs, one roll of the pair with respect to the other so as to place tension upon the cloth.

This application is a division of my application for Cloth guider, Serial No. 78,436, filed May 7, i936, and is intended to take the cloth guider subject matter as distinguished from the method' of guiding cloth, which latter subject matter has been retained in the parent case.

One of the purposes of my invention is to provide lost motion between anelectrical operating mechanism for shifting the movable roll of 'a cloth guider and the roll, whereby the operating mechanism can be brought up to speed before its energy is applied to roll actuation,r and a hammer blow can be delivered at the end ofv the lost ymotion part of the stroke of the mechanism. In order that the movable roll may yield when a thicker portion oi cloth passes between the rolls, in order to avoid abrupt gripping when the hammer blow is struck, and to help in return of the parts to initial position a spring is interposed somewhere in the train between the member delivering the hammer blow and the ro-ll.

vA further purpose is to use a reversing motor for shifting the movable roll of the pair, the reversing of the motor being operative to give quicker return of the parts than otherwise would take place and/or to release any mechanism in the train which would retard or prevent automatic reversing.

Whether a reversing motor be used or not a spring is preferably inserted in the train tending to reverse the operating mechanism with release oi the motor by which the roll has been shifted.

A further purpose is to provide a capacitortype motor with condenser connections for operation ofthe movable roll of a cloth guider in order that the charge from the condenser may be used to secure a maximum rotation in a minimum of time and with a considerable saving in upkeep of the motor,

A further purpose is alternatively to use a series motor with or without reversal of the motor, depending upon the character and reversibility of the intermediate transmission connections used. v

A further purpose is to provide a motor of rotary or of plunger type with a lost motion connection to the shiftable roll of a cloth guider pair, preferably using a springwithn the train of connection after the lost motion has been taken A further purpose is to use the torque due to use of a capacitor motor or series motor not only g to give high speed quickly in a part of a turn, for example, for the purpose of delivering as much of a blow as possible at the end of a lost motion movement, but to use the high torque of the capacitor motor or series motor and the reversible character of intervening connections to start a release, where a reversing motor is used, without the need for introduction or lost motion between the armature of the reversing motor and the connector by which transmission has been had.

A further purpose is to use a cam between an operating motor and' a roll which is to be transversely moved by it, taking advantage either of easy reversibility due to stopping on a steep slope of the cam or the holding ability due to stopping at an approximate dwell of the cam, in the rst place not requiring reversible mechanism for release, but in the second place providing a reversible moto-r or other mechanism for releasing the cam. Both can be used.

A further purpose is to use the freedom from reversibility of an intervening screw thread lbetween operating mechanismV and the roll to be moved transversely by it as a means of holding against reverse movement of the roll due to the high pressure upon the roller and reversing thread to release, then releasing by a high torque reversible motor operating upon the shaft of the screw thread with or without lost motion between the motor and the shaft to give a blow for starting the shaft. l

A further purpose is to utilize a cam blow operating from a raised cam initial` position soas to bring the heavy part of the cam down from above, in order that the weight of the heavy part of the cam may facilitate starting movement of a rotary motor.

A further purpose is to facilitate the use of an electric motor of rotary type, by selection oi a motor having large starting torque, by allowing the motor to get under way before it is applied to operation of the roll and by delivering the energy of the motor through a compression spring.

Avfurther purpose is to operate-the movable roll of a pair through a, cam and to use a steep enough portion of the cam to avoid sticking of the cam and to facilitate release of the cam by reaction of the spring.

A further purpose is to start the movable parts of a roll shifting mechanism for a cloth guider from a position and in a direction such that they shall take advantage of the weight of the parts in the tightening operation, using gravity to assist rather than to retard the start and leaving return of the parts to their initial position to the withdrawal movement.

A further purpose is to provide a preferably rotary and desirably reversing motor with electrical contact means in a vacuum and with condenser means by which the effects from the breaking of the current are relieved.

A further purpose is alternatively to use a tilting mercury switch for motor supply current interruption.

A further purpose is to provide an electro-magnetic motor for operation of the shiftable roll of a cloth guider, giving lost motion between the start of the motor and the connection with the roll and permissibly using a reversible motor with lost motion in one direction of movement.

I have preferred to illustrate my invention by a few forms only, selecting forms which are practical, eifective and reliable, but which have been chosen particularly because of their value in illustrating the principles of the invention.

Figure l is a fragmentary view showing a stretch of clothwith two cloth guiders in position, each including a pair of rolls.

Figure 2 is a perspective view of a cloth guider embodying the invention.

Figure 3 is a section of the structure of Figure 2, taken through the thrust mechanism and movable roll perpendicular to the axis of the roll and looking toward the motor.

Figure 4 is a section of the structure of Figure 3 taken upon line 5 4 of Figure 3.

Figure 5 is a view of the structure of Figure i taken from the position of line 5--5 of Figure 4.

Figure 6 is a diagrammatic view of electrical connections used in Figures 1-3.

Figure 7 is a longitudinal section through the contact maker seen in Figure 3.

Figure 8 is a perspective view showing another form of the invention.

Figure 9 is a fragmentary rear view of a portion of the structure of Figure 8 showing a face cam and operating parts.

Figure 10 is a fragmentary section perpendicular to the axes of the operating rolls showing parts of Figure 8 and adding cloth passing between the rolls.

Figure 11 is a section of Figure 9 upon line H-I|, showing a loose motion mechanism interposed between the motor and the roll-shifting mechanism.

Figures 12, 13, 14, 15, 16, 17 and 19 are fragmentary sections perpendicular to the roll axes and showing additional forms.

Figure 18 is a fragmentary top plan view of the structure of Figure 19.

Figure 20 is a diagrammatic view of electrical connections used in Figures 8, 9 and 10.

Figure 21 is a perspective view showing a solenoidal form.

Figure 22 is a section of Figure 21 taken upon the line 22-22 with the wiring omitted.

Figure 23 is a vertical section perpendicular to the paper through a solenoid which may be used in the operation of Figure 22.

Figures 24,25, 27 and 28 are elevations partly in section and perpendicular to the roll axes (in this feature being similar to Figures 13-1'7 and 19) showing electromagnetic operating -mechanism acting through springs to shift the movable roll and close the magnetic circuit.

Figure 26 is the top plan View of the structure seen in Figure 25.

Figure 29 is an end elevation of a motor mount providing an adjustment.

Figure 30 is a section of Figure 29 taken upon line 311-30.

Figure 31 is a section of Figure 30 taken upon line 3|-3L Figure 32 is a side elevation of a mercury switch apparatus and Figure 33 is a section of Figure 32 taken upon line 33-33.

In the drawings similar numerals indicate like parts.

My invention utilizes pairs of rolls placed dlagonally adjacent the edges of a movable strip, one of each pair of rolls being movable controllably through operation of a lnger engaged by the edge of the strip, corresponding in this arrangement and general operation with devices which have been used for many years in the art.

The invention resides primarily in the mechanism by which the movement of the feeler finger engaging the strip, hereinafter for convenience called cloth, is converted into control of the moable roll.

Figures 1-6 The web 32, usually of cloth passes between the rolls of two pairs of rolls, each

pair

33 and 34 comprising a fixed roll and a movable roll mounted upon a suitable bracket shown generally at 35 in Figure 1. In this figure rolls 34 only appear. The two pairs of rolls and their mounts are opposite counterparts for all substantial purposes and, therefore, the rolls of one pair only are followed throughout the rest of the illustration. It is to be noted, however, that the two pairs of rolls use identical brackets with a slight difference in placing of duplicate parts upon the bracket.

In the illustration the cloth (web) has considered as moving in a vertical plane, though this obviously is not controlling as the clothl could be moved in a different plane, if desired. So far as above described the guider could be any one of the forms of the present application.

The bracket 35 is attached to or mounted upon any suitable support in proper relation to the frame of a wind-up roll or other mechanism (not shown) intended to receive the travelling web.

The bracket 35 carries attachment boss 33 and is apertured at 31, 3B, 39 and 53. Whether the bracket be for a pair of rolls in the right-hand or in the left-hand position locations one only of the openings 39 and 45 is used. The bracket member 35 supports the ange fil of motor base 42. Upon these are also carried a shield or guide 43, the fixed roll 34 and a cradle 44.

The cradle comprises a sleeve 45, arms 4G and 41, movable roll 33 and a yoke 48, all supported from a bolt 49 and nut 5U, in the illustration passing through opening 39. In the opposite counterpart pair the bolt extends from the same face of a corresponding bracket but passes through aperture 4U. The metal at the apertures is reinforced by

bosses

5i, 52, 53 and 54. The fixed roll is supported by a bolt 55 and nut 56.

The yoke 48 includes U ends 5'! and 58 and a connecting bar 59 conveniently faced to provide a thrust plate or anvil 60 to receive the pressure by which the cradle is shifted to press the movable roll toward the xed roll and thus to engage the cloth betweenthem; l n

Both the iixed and movable rolls are supplied with suitable friction reducing bearings, as they must rotate at considerable speed. ,The guide or shield 43 is held to the frame member by screwsrl. It is stiiened by ange 62 and extends both above and below the meeting line of the xed and movable rolls.

The base flangedi is attached to the bracket by a bolt 63 vtting into the flange and passing through the elongated aperture 31, thus providingv adjustment of the base lengthwise of the elongated openingw31. The base supports the main operating parts including a motor 64, con tact maker65 and condenser 66.

In ,thel rotary forms shown the motor is or may be reversible with the result that where reversible the current is passed through the mo.- tor in opposite directions according to the direction of intended rotation. Where the motor 'is not reversible the switch maybe of a simpler form. In thevillustrationthe contact-making switch is shown kin the more complex form in order to include therein the 4simple form where the simpler form is desired. y

rThe. rotaryfmotors shown are of two types, both reversible where desired. The motor shown in the illustration of Figure 1 is a capacitor motor. That shown in Figure 8 is a series motor form and that in Figure 18 is a plunger type motor which is not rotary.

Shifting of the web bodily is operative through the corresponding feeler and the mechanism set in motion by its movement to shift the movable roll toward the fixed roll inthe pair at the side at which the edge moves towardthe center and where both edges move toward the center as in the case of narrowing of the web the movable rolls of both pairs are actuated, each operating independently of theotherto cause gripping of the fabric and correspondingly to cause filling out of the fabric at that edge to the normal edge position for a properly centered web of standard width.

,y The present invention aimstosoften the grip, speed up the movement and reduce the excessive repairsY which havemadewobjectionable prior purely mechanical devices, and to substitute therefor the substantially instantaneous opera- ',tion due to electrical actuation with resilient grip; and to secure rapidand eiective release, either, for example, by reversing the motor or by formation of the intermediate transmission member so as to facilitate the release.

Each control mechanism is actuated through its ownindividual feeler finger 61 supported at 68 preferably` upon the same base as that upon which its motor 64 is ymounted. A preferred mechanism by which movement of the feeler finger is transmitted into reversible contact for passage of electric current through the motor in either direction is illustrated in Figures 3, 4 and 5 and the electrical connections for acapacitor motor are shown in Figure 6.

The feeler finger 61 operates the contact, allowing the motor to govern the movable rollin each of the constructions, i. e., in each of the pairs of rolls, alternately gripping and releasing the cloth near each edge of the cloth The eeler finger 61 is tensioned toward and against the edge of the cloth by a train of connections seen best in Figures 4 and 5 comprising a tension strip 69 desirably made of bre, pivoted at to a connecting tension strip 1| which isV in turn pivoted at 12 to a lever arm 13 upon the outer end of which is mounted a weight 14. The lever arm 13 is pivoted at 15 to any fixed support which in the present case is supplied by a stud 16 threaded at 11 and adjustable in a fixed bracket 18. The stud 16 is retained in adjusted position by a lock nut 19. The weight `is of vcourse effective to draw the feeler finger vtoward* the edge of the web, provided the placing of the parts is such as toswing the lever arm 13 in vertical planes; but even in that case it is undesirable that entire reliance be placed upon the weight for thedesired tension, both because the necessary pressure against the edge of the fabric would require an unduly large weight and because (a) the action of gravity is notas rapid as may be desired to follow up the edge of the web and (br in the opposite direction of movement, undue inertia must be overcome in lifting thev weight quickly. For these reasons I have found it desirable to supplement the gravity tensioning by the use of a tension spring shown at 80, or to use the tension spring 80 in place of the weight.

The springv 80 is anchored at one end at 8| to a in 82in the fixed stud and at the other end at 83 to one of the movable tensionstrips, here shown as strip 69.

The structure just described affords a convenient and effective meansv of vibrating-the movable element of a contact maker of which one form is shown in Figure 7. Here the vibrator 84 is carried by the resilient diaphragm end 85 of ay vacuum tube 86vwithin whose opposite end 81 are

xed contacts

88 and 89.

The anchorage of the fixed stud in the bracket 18 aords an adjustment by which the neutral position of the vibrator tongue between contacts 88r and 89 may be set to suit the requirements of the individual web so as very exactly to maintain the position of that side of the web at which the corresponding feeler finger is adjusted; that is, to shift the movable roll when the position of the webdeviates from the predetermined position at which the feeler finger is set.

Contacts

88 and 89 are yinsulated within the head 90 of the vacuum shell, a third connection being made to the vacuum shell.

The vibrator 84 terminates in a tongue 9| which is shown in neutral position so that with movement in either direction the tongue can is supported in a preferably insulating casing 95 which may be carried by any convenient fixed part. l

The connectionsfor the capacitor motor are seen in Figure 6 where a well known form of reversible capacitor is illustrated diagrammatically. The armature is of squirrel-cage type,

` short-circuited and the iield windings are shown at 96, 91, 98 and 99, |00, |0|, |02 and |03.

The end windings are connected through conductors |04 and |05 with

terminals

88 and 89 and the intermediate point |06 is connected with line |01.; 1

The vibrator is connected with the other side H18 of the line.

The contact is provided with a condenser placed across the terminals, which serves not only to reduce the spark with reversal of the contact but also to provide a starting impulse at the beginning of each motor operation. This starting impulse is applied during the lost motion part of the rotation of the motor; i. e., when it is not connected to its load.

In Figure 6 the condenser 6B is thrown across between

contacts

88 and 89.

Great delicacy is secured by the construction of the contact maker, along with freedom from faults due to flexing. The contact is nonsparking, safe from iire and free from danger to life.

The current by which the motor is driven is made and broken sometimes as rapidly as thousands of times a minute. Both the motor and the Contact maker are therefore desirably of special type. As either alternating current or direct current may be used, the contact maker must of course be suited-to the kind of current and to the motor, and the motor must be able to accelerate with great rapidity upon the kind of current for which it is intended.

In order to illustrate Vthe fact that my invention is not dependent upon one type of current only or one type of motor only nor upon a single type of contact maker, I have illustrated two types of each. The two rotary motors are the capacitor, whose diagrammatic connections have just been given above, and a series motor, the capacitor suited to alternating current and the series motor to direct current.

The motor 64 `of Figures 1 3 is provided with a shaft I B9 which carries a cam IIU and also arms I I I and I I2 by whose stop engagement with roller I I3 excessive turning movement of the cam is prevented.

The peripheral cam offers an advantage in that its lobe has a certain fly-wheel effect.

The cam is preferably inoperative at the beginning of the stroke, either by reason of operation over a range iIll-IIE of minimal throw, where the throw increases slowly or because free from contact with its load at the beginning of the stroke. The motor armature thus has opportunity to accelerate, with or without condenser impulse before serious resistance is met. This same function of allowing the motor to start on no load, or with a low load, is secured in various ways in the other forms.

For the reason that it is desirable to assist the starting movement oi the cam by the weight of the lobe II 6, the lobe at rest is preferably located above the center of the shaft (or a counterweight is used, both of which may be used to give added mass as well as advantageous mass position) and is shifted downwardly for the blow and back to release the parts, Because it is generally desirable that the cam shall not stick at the end of its stroke the shaft is preferably stopped before the dwell of the cam has become engaged, stopping while the cam is operating on a relatively steep part of its cam surface and giving opportunity also, as will later appear, for the cam to be assisted in starting in reverse direction by reaction of a spring which is cornpressed during the forward motor movement.

The cam engages a roller I I 'l supported in a sleeve III! rigid with a plug or block I I9 slidable upon a guide or pin E which is threaded into anvil 6B. A pin I ZI passes through the guide and fits into slot I22 in the plug, so that the sleeve and plug unit is free to travel upon the guide but cannot lturn upon it. The plug rests upon a spring |23 and, with movement of the roller presses the spring against the anvil, transmitting the pressure upon the roller to the anvil but with intervention of the spring. The purpose and effect are that the movable roll shall be subjected to a quick and vigorous thrust, called a blow here because of the accumulated torque of the armature delivered in the blow, but that between this thrust and the movable roll a spring shall be interposed.

The presence of the spring softens the blow, distributing it over a somewhat longer space of time without dissipating it, reduces the abruptness of the grip for the same ultimate pressure and, while the high pressure thus applied is on, nevertheless permits thicker portions of the web to pass through between the ixed and movable roll without danger to the web. This also provides a reverse spring pressure when the motor impulse is spent by which pressure, as soon as the current is cut off from the motor there will be a tendency for reverse movement of the cam, which reverse movement may or may not be facilitated by opposite electrical impulse through the motor, depending upon whether or not the motor be of the reversing type.

The connection between the cam or other transmitter of the blow and the spring may of course be greatly varied. In the illustration in Figure 3, the block and sleeve unit slides upon the pin and compresses the spring along the length of the pin and against the anvil.

Arms IH and II2 engage roller II'I to limit cam movement and in Figure 3 the cam has been shown as stopping in its clockwise throw at a point where the cam surface is still steep so that when the current is cut oil from the motor S4 a strong pressure of the spring will be brought to bear upon the relatively steep face of the cam to reverse the cam.

The exact extent or" pressure brought by the movable roll against the fixed roll can be adjusted very nicely in the form of Figures l, 2 and 3 by adjustment of the position of the base B2. This can be done by setting bolt 63 at any corresponding position. The extent of throw of the cam may also be altered by loosening set screw IIB', turning the cam on its shaft and re-setting the cam in its new position by this set screw IIIl. In other views adjustment is provided also by adjustment of the position of the motor upon the base 42, giving a variety of means by which the extent of blow and the reactive effect of the spring upon the cam can be altered.

The invention contemplates reversal of the movement of the cam shaft in any one of several different ways. It can be reversed by the reaction of the spring I2@ after the current has been cut off from the motor, by the reversal of the motor and by the combined reactions of these two.` The reversal of the motor is of great assistance in that it carries the parts back quickly to their initial position and provides any initial lost motion which the reaction of the spring alone would but poorly provide.

The lost motion at the start of rotary movement of the shaft is of great value but it can be secured in other ways than by the use of a cam, and may occur through the fact merely that the friction roller I l 'I is mechanically prevented from following up the cam or other operating mechanism to the full extent of Withdrawal of the mechanism. In Figure 3 engagement' of the end |24 of the slot |22 preventsv the sleeve and plug from returning toward the motor shaft far enough for the roller fully to follow up the cam except by angular movement of the cradle 44.

Figures 8-11 A second revoluble form of motor is shown in Figures 8-11 where a series motor 54 is used with somewhat different. mounting for the parts than shown with respect to Figures 1-3. The motor is here mounted at Iright angles to the position in Figures 1-3 in order that its shaft |09 may turn a face cam |25 by which the rocking of the movable roll is effected. It has been convenient to show a bearing |26 here, not shown in Figure 2.

In the Figure 8 formk the parts are reversely placed with respect to Figure 2.A The arm 4| takes the place of the flange 4| and the bolt 48 engages in opening 40 instead of opening 39. The yoke arms` 4t4 are located in much the same position with respect to the sleeve as in the other views and the yoke terminates in a cradle shown as of the same character as the cradle shown in Figures 1 and 2.-

With a view to applying the invention to existing mechanical guiders with as little change as possible the motor Ibase plate |27 'and other parts are mounted by means of brackets or braces such as |28. l l

The motor 54 is turned atr right angles with respect to the motor 64 because it is desired to transmit the necessary thrust to the movable roll through a face c am instead of through a peripheral cam.

The shaft |55 is carried by a bracket |36 from any suitable supporting structure within which' I the shaft has proper bearing so that the shaft i turning too far.l

face cam lends itself to lost motion provision,

presents a face cam- |37 to a projection |38 upon the head |39 of a rocking lever |40. The'lever is pivoted at Elli upon suitable fixed structure so that turning of the face cam rocks the lever and compresses spring |42 between the lever and the anvil Gil of the cradle. Rotation of the cam is limited by engagement of a stop' |37 with projections |38.

The face cam may of course be made steep enough for the compressed spring to assert a retractive force upon the pins and thusupon the head |25 but does not lend itself to reversibility as does the peripheral cam construction as in Figures 1-3.

Any suitable means may be used to effect control of the cam position and to keep the cam from As with the peripheral cam the where designed, in starting the motor shaft at the time that the cam engagement is at a cam dwell so as to allow the angular movement represented by the dimension of the dwell before resistance is met against its rotation. This lost motion is additional to that provided by the pins and wings shown in Figure 11.

Though the motor 54 is intended to-be a series wound motor a capacitor motor could be used here and there is special advantage in using a lost motion connection by which the motor is given time to get up speed without load with the Acapacitor type of motor because the condenser delivers its 'impulse to the motor at the start during the lost motion beginning stroke, that is,

- with which it has engaged.

The motor shown in Figure 8 is a series wound reversible motor, the connections for which are shown diagrammatically in Figure 20. It has not been considered necessary to show the full connections ether than to indicate the place of the contact members Sil and 8S and tongue 84 in the connections made.

In each of Figures 9, 10, 13, 14 and 15, a limiting screw |43 is shown held in set position by lock nut |44 and carrying ahead |45 whose position of adjustment determines the `extent of compression of the spring |42. The screw is extended at |43 into the spring to retain the spring in position. In both' of FigureslS and 14 the shafts |35', |352 are made disconnectible, the one by a straight pin and slot connection |46, |47 and the other by pin and bayonet slot connection |48.

In Figure l5 the structure is intended to be of the same general characteras shown in Figures 8-10, but a different form of face cam is used, in that a thread is .utilized to effect the compression ofthe spring. For this reason it is not automatically reversible but must be used with a reversing motor.

The rawhide covered driving pins of Figure 11 are used to engage wings |33 upon a shaft |35. However, thev operation of the cam (thread) is quitey different in detail from that of the face cams of Figures 8-14v for example.

The fixed support |49 carries a sleeve |55 which is rigid with and in the illustration integral .with a hollow external screw thread 5| through which the shaft |35' passes rigidly lto support an angularly stationary nut '|52 engaging the thread. Rotation of the shaft without rotation of its nut therefore advances or retracts the nut upon the thread causing impingement of pin |53 against the end 154 of rocking lever |45.

In- Figure 16 the place of the cam upon the motor shaft has been taken by a crank disc |55, crank pin |56 and connecting rod |57 by which a plunger |58. pivotally connecting to the rod at |59 is guided within sleeve Hill to engage spring |42. In this Figure 16 illustration two lost motions are possible, the one by initial dead center position ofthe crank pin 'and the other by the spacing |5| between the plunger |58 and the spring.

In Figures 21 and 22 the same general supporting mechanism and mounting for the fixed and movable rolls and for the cradle by which the movable roll is carried is shown as in Figure 8, but the platform or frame upon which the motor and contact maker are mounted is changed.

The same feeler nger and connections may be used in the construction of Figures 21 and 22 as in Figures 1 3 and 8; and for the same purpose, namely, to change the movement of the ieeler nger into reverse movement of the contact parts. No point is made here of altering these connections.

The cam |90 engages with the roller ||1 of operating connections which may be of the same character as shown in Figure 3. In any event the operating connections seen in Figure 22 between the cam and the anvil of the cradle present a guided sleeve carrying a roller which may be pressed to the right in the gure to compress the spring against the anvil.

The solenoid comprises generally in its preferred form, as seen in Figure 23, a magnetic yoke |96 made up of laminations, of which one is seen in elevation in Figure 23, closed by inwardly directed extensions |95, |96 at the top and bottom except for openings |91 and |98 through which the rod |99 and the lower part 200 of the armature pass. The laminations form a nearly complete magnetic circuit about a winding upon spool 202 through which the armature operates.

The armature is shown in its upper position where the magnetic circuit is closed, at the top by engagement of the shoulder 203 with the under surfaces 205| of the laminations, and at the bottom by engagement of the shoulder 205 of the armature with the end surfaces 206 of the laminations.

The fit of the armature within opening |98 conveniently may be made closer than the fit of the rod |99 within the opening |91. This is partly due to the fact that the armature is less diverted from its direction of movement at the bottom than it is diverted at the top'. The top is much closer than is the bottom to the points of engagement by which it eiects movement of the roller. Whatever the fact as to this when the armature is lowered there is more air gap for magnetic lines at the top than at the bottom, with the result that full engagement of the shoulder 203' with the surfaces 204 is of more importancel in closing the magnetic circuit than is the engagement of the shoulder 205 with the lower surfaces 206. Both engagements, however, assist inV completing the magnetic circuit. The point has been made of completion of the magnetic circuit by full lifting of the armature to the position seen in Figure 23 because of the importance which this full stroke of the armature has in cutting down current through the coil 20|.

Complete stroke of the armature at the time when the roll has been shifted to its proper fabricengaging position therefore becomes quite important. It has in the past been difficult to secure both because of the difculty in adjusting so that the movable roll has just the proper tightness of grip against the xed roll when the armature is in full stroke position and because,

after careful adjustment, the rapid wear of the n movable roll surface quickly disturbs the nice adjustment required.

I take care of the diiculty of adjusting the roll position and the full armature stroke by a lost motion connection between the two which not only permits movement of the armature to full stroke position after the roll has gripped the fabric, but resiliently presses the roll to its duty so that there is a continued follow up by the movable roll through a Wide range of wear of the movable roll.

The lost motion adjustment provided above interposes resilience in the form of a spring in the train of connections; and this spring may be the same kind of a spiral spring which has been shown in other views and forming other combinations, or may be a spring of a dierent character; for example a spring has been shown in Figure 25.

Whatever the form of the spring it offers advantages of permitting Varying thicknesses of cloth to pass through between the rolls, of avoiding too'harsh initial contact between the rolls and the cloth, and of reacting to assist in separation of` the parts when the current through the electromagnet has been interrupted.

In Figurezl. a direct acting electromagnet 201 is shown having

coils

208 and 209 with pole pieces 2|0, 2|| and armature 2|2 which is shown 1n closed position completing the magnetic circuit through the pole pieces. At the opposite side from the pole pieces the magnetic circuit is completed through a plate 2 3 which is shown conventionally and which is extended to form a bracket 2 i for support upon any suitable xed part. The armature is connected through rod 2|5 with a cup-shaped head 2|@ fitted to engage with the roller, for example of one of the previously shown spring train members such as that whose roller engages the cam in Figure 3, or in Figure 22. The cup would be altered merely in shape to t any other intervening resilient parts.

In Figure 25 a direct lever operation is shown in which electromagnets of the character for example shown at 201 in Figure 24 are reversely turned so that an armature 2|2 is drawn toward them by the electric current, or is shifted away from them by dropping of a movable roll, such as 33 operating on lever arms 2 |1, of which one only is shown. The lever arm 2| 1 is part of a bell crank or rocker arm, rocking or tilting about a center 2 i0 and there having a hub 2 I9 upon which at an intermediate point a flat spring 220 connects the flange 22| of the hub with the armature 2 i2. The spring is shown as riveted to place at 222.

- magnetic circuit by engagement with these` pole pieces. When it is remembered that the rollers are-held to contact by electromagnetic action during aconsiderable part ofthe operation of the vguiderand thatthe amount of current through the guider is greatly reduced by closing the magnetic circuit, the importance of having a resilient insertfin the train of connections between the electromagnetic core (if it be a solenoid) or armature (if it be an electromagnet having definite poles) will be appreciated. The above results iny great vdanger of burning out the winding ofthe electromagnet or armature if the circuit be not closed. The importance of the insert in reducing the delicacy of adjustment required and in providing a follov'wup to maintain proper operation for a long period, notwithstanding wear of the movable rolhhas already been explained.

' maker 225,-225 of which the movable member is In order to give breadth to the language of the claims, to cover both the soleno'idal core and the electromagnetic armature, the word armature will ber-used in a broad sense, as well as in individual cases in a restricted sense, to refer to a magnetic closure between magnetic poles.

AIn Figure 25 the electrical connections are shown at 223 and 22e, that at 226i being shown as passing through a purely diagrammatic contact seen at 223'.; It will bea part of thefeeler nger Asystem and carries an insulated plate v225 ccnnectedl to lone wire engaging contacts 225 connected with another. Direct current is supplied s about an axis 232. The difference between swing'- the cloth between the rolls. The resilience of the spring permits these rollsto be pulled to position ybefore thearmature 2 l 2 engages the pole piecesso that the armature can be pulled to position against the pole pieces by the electromagneticaction without danger of the movable rolllfailing to comev to its' proper position with respect to the fixed roll 311i,

In `Figure 24 thethrust in compression of the spring is direct. In Figures 25, 26 and 27 the thrust is effected through leverages within which the spring'is inserted. A leverage system can be used, of course, with the spring outside, and' so fary ,esits ultimate effect is concerned, it makes little differenceat which endvof the lever the spring appears, 4.Because of the greater convenience in locating the lever close to a yoke or cradle, by which the movable roll is carried, it has been pre-- ferred in Figure 28to locate thespring at this end of the leveragey Accordingly the lever 231 carries armature 2 i2 at one end of its lever arm 238,

and pushes with its opposite end 2,39 against any1 suitable spring compression system here shown as of a general type, seen in Figures 3, 22 and 24.

, It is my intention to claim broadly the combina-- tion of a movable roll suitably supported, an

' electromagnetic operating mechanism which .needs to have its magnetic circuit completely the magnetic circuit, is taken up in the resilience of the connections between.

`In Figures 29, 3G 4and 3l, an adjustment is shown for shifting the motor 642 toward and away from the movableroll in order that the ultimatecompression of the spring in the train between the motor and the roll may be capable of very exact adjustment. In this construction the motor is supported upon a base 2M! which is dovetailedfor guiding purposes between :lixed guiding

members

226, 242. An adjusting screw 2133 engages a block 2M carriedl by the base so that turning ofthe screw by the head 245 shifts the motor to or from the movable roll. The position of the screw is set by lock nuts `fi.

In Figures 32 and 33 an alternative contact making device is shown comprising a support 2M upon which a rocking Contact holder 2M is pivoted through link 249. The Contact maker is shown at 220, where it is held between clamping side members 259, 252.

The contact comprises a mercury make and break, with a contact continuously made with the mercury, `and a second contact intermittently made upon swinging movement of the device. The mercury lies within a closed chamber from which the air has been exhausted and which has been filled witha gas which will not support an arc. f

The feeler finger operates through a flange 253 against a roller 252 bywhich the mercuryY contact member is tilted. The weight lof the holder opposes rocking movement and brings the parts back to the position seen in Figure 32 when the pressure from the flange 253 is released.

In operation the contact is made by movement of the '-feeler inger against the edge of the cloth or fabric, and is broken as soon as the fabric has been shifted over sufficiently so that the feeler finger is no longer shoved far enough to maintain the contact. is used and the current has been shut oif after application, the roll is not released unless by reason of spring reaction or until the feeler nger has moved far enough to make reverse contact, when the direction of rotation of the motor is reversed with subsequent movement of reverse as well as on the initial movement of the motor shaft permits the motor to pick up speed rapidly and renders it more effective when the lost motion has been taken up and the' torque of the shaft is applied to the load.

Where a reversing motor Placing the cam so that its lobe is up gives a very slight advantage in the initial movement.

It is desirable but does not make a serious dif` may be left to the judgment of the designer in l View of his preference and of any other features of the design which may affect this question. All of them will work.

A convenient and highly effective form of feeler finger contact operation has been shown. Obviously various other forms of feeler nger actually may be utilized to take advantage of the other features of my invention.

The principle of having an electric motor- Whether rotating or reciprocating-perform the earlier part of its stroke free from load and then deliver a blow at the end of its stroke with the accumulated energy developed is present in most of the different forms. By this means the blow delivered by the motor is sufficiently increased so to be eiective notwithstanding that it is applied through the spring.

The lost motion and condenser and the resilience make it possible to apply the energy from a moderate size motor to great advantage without losing the benefits from the spring in following up, in permitting unevennesses of cloth to pass through between the rolls and in reacting to start reverse movement of the roll after the vsource of current has been cut off from the 35.1

motor.

The reactive eiect has been heightened by use of a cam or crank arm with the rotary motor form and the interposition of a rocker arm and cam in the reciprocating motor form shown.

With the reversible motor the reactive elTect of the spring upon the cam or the crank arm assists in starting the motor in its reverse direction, giving something comparable with the lost motion interposed in the direct movement oi the motor or with the impulse given by the condenser in the capacitor type.

Where the capacitor type of motor is used the direct stroke at the start has the benet both of the loadless character due to lost motion and of this impulse from the condenser. On the reverse stroke the motor has the combined advantage of the reaction of the spring and the impulse due to the condenser.

One considerable advantage of the use of the reversing motor is that it ensures a complete return stroke, that is, a return stroke which not only brings the spring and its more closely related parts to their initial position but which carries the motor beyond so as again to provide the lost motion for another stroke. The full stroke reverse thus ensured by the reversing of the motor (as distinguished from merely turning back its armature, for example) may or may not be accomplished by the reaction of the spring, depending in this particular upon the extent of impulse given to the motor armature which may or may not carry it far enough to provide the lost motion for the next forward stroke.

In View of my invention and disclosure variations and modications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain part or all of the beneiits of my invention without copying the structure shown, and I, therefore, claim all such in so far as they fall within the reasonable spirit and scope of my invention.

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

l. In a cloth guider, a frame, a pair of rolls mounted for movement of one of the rolls t0- Ward and away from the other, an electromagnetic motor and connection between the motor and a movable roll including resilience and lost motion and a source of energy for the motor proe viding capacity whereby a capacitative impulse is given to the motor at the start of its movement and during the lost motion period thereof and the motor, after it has been brought up to speed, is connected to the roll through the resilience.

2. In a cloth guider, a frame, a pair of rolls mounted in the frame, one relatively fixed and the other relatively movable, an electromagnetic motor for moving the movable roll and reversing resilient connections between the motor and the roll whereby when the electric current is cut ofi` from the motor the resilience of the connections reverses the motor,

3. In a cloth guider, a fixed roll, a movable roll, a source of electric current, a reversible motor operated by the current and connections between the reversible motor and the movable rcll whereby the rotation of the motor in one direction presses the movable roll toward the fixed roll and rotation of the motor in the opposite direction releases the pressure, in combination with a feeler finger adapted to engage the cloth atone edge and operating mechanism including a contact device whereby reverse movements of the finger actuate the motor electrically in opposite directions.

4. In a cloth guider, a fixed roll, a movable roll, a source of electric current, areversible motor operated by the current, connections between the reversible motor and the movable roll whereby the rotation of the motor in one direction presses the movable roll toward the fixed roll and rotation of the motor in the opposite direction releases the pressure, a spring within the connections providing resilience, in combination with a teeler` finger adapted to engage the cloth at one edge and operating mechanism including a Contact device whereby reverse movements of the nger actuate the motor electrically in opposite directions.

5. In a cloth guider, a fixed roll, a movable roll, a source of electric current, a reversible motor run by the current, connections between the reversible motor and the movable roll whereby the rotation of the motor in one direction presses the movable roll toward the fixed roll and rotation of the motor in the opposite direction releases the pressure, the said connections containing lost motion to permit initial rotation of the motor before its motion is applied to pressure of the roll and a feeler iinger and connections including contact making mechanism whereby engagement of the finger with the edge of the fabric results in passage of current through the motor in one` direction when the fabric is running too far over on one side and in the opposite direction when the cloth is running not far enough to the said side.

6. In a cloth guider a fixed roll, a movable roll, a source of electric current, a reversible motor run by the current, connections between the reversible motor and the movable roll whereby the rotation of the motor in one direction presses the movable roll toward the iixed roll and rotation of the motor in the opposite direction releases the pressure, a spring within the connections providing resilience, the said connections containing lost motion to permit Iinitial rotation of the motor before its motion is applied to pressure of the roll and a feeler finger and connections including contactA making mechanism whereby engagement of the finger with the edge of the fabric results in passage of current through the motor in one direction when the fabric is running too far over on one side and in the opposit-eA direction when this condition is relieved. ,7. In a cloth guider, a fixed roll, a movable roll, a reversible motor, connections between thev reversible motor andthe movable roll whereby the rotation of the motor in one direction presses f the movable roll toward the fixed roll and rota- .tion of the motor in the oppositedirection rev ferent directions.

8'. Ina cloth guider, a xed roll, a movable roll, a reversible motor, connections between the reversible motor and the movable roll whereby the torsion of the motor in one direction presses the movable roll toward the xed roll and rotation of the motor in the opposite direction releases the pressure, said connections providing lost motion between the motor and the roll and a spring by which pressure from the motor is transmitted to the movable roll, and means for passing current through the motor in opposite vdirections with reverse shifting movement of the cloth. v 9. In a cloth guider, a frame, a pair of rolls,

one movable toward and away from'the other, a feeler nger yadapted to engage fabric passing between. the rolls, a vacuum contact maker-and- .byv reason of the tor, a cam carried by the breaker and connections by which it is operated position of the eeler finger, a capacitor motor connected with the contact maker to have its direction of rotation reversed by lthe contact maker and connections between the motor and one of the rolls having lost mon tion and including resilience, whereby the capacity of the capacitor motor circuit gives added impulse to the motor during' a lost motion start of the motor and the motor at higher speed engages the connections to move the roll.

l0. In a cloth guider, a reversible electric momotor, a spring train compressed by thecam, a movable roll engaged by they spring of the train, a Xed roll with which the movablev roll cooperates, supportsy for the rolls, a feeler finger engaged bythe cloth, a vacuum make-and-break contact device operated by the feeler finger to make contacts with opposite directions of movement, a spring holding the ieeler finger to its duty against the cloth and a Counterweight lassisting in holding the feeler nger against the cloth.

11. In a cloth guider, a frame, a pair of rolls mounted in the frame, one relatively xed and one relatively movable toward and away from thexedrolLa normally stationary, intermittently actuated electromagnetic motor, acam operated by the motor and havingthe lobe of the cam normally up and resilient connections between the cam and movable roll whereby the downward movement of the cam assists in the blow struck through the resilient connections.

12. In a cloth guider, a normally stationary, intermittently actuated motor, a finger engaging the cloth, connections between` the finger and the motor including asource of electric current whereby the current is passed through the motorwith lateral movement oi the cloth in one direction, a. cam swung about its axis by the motor and providing lost motion at vthe beginning of the cam stroke, a fixed roll, a movable roll and pressure-transmitting means including a spring between the cam and movable roll.

13. In a cloth guider, 4a frame, a pair of rolls mounted inthe frame, one relatively fixed and one relatively movable toward and away from the xed roll, a normally stationary, intermittently actuated electromagnetic motor, a cam operated by the motor and having the lobe of the cam normally up whereby the movement of the cam assists in the blow struck and resilient connec-` tions between the cam and movable roll.

14. In a cloth guider, a reversible electric motor, a cam carried by the motor, a spring train compressed by the cam, a movable roller engaged by the spring of the train, a fixed roller with which the movable roller cooperates, supports for the rollers, a feeler nger engaged by the cloth, a vacuum make-and-break contact device operated' by the feeler finger to make` contacts with opposite directions of movement, a'spring holding the feeler nger to its duty against the cloth and a counterweight assisting in holding the feelerl finger against the cloth.

15. In a cloth guider, a reversible motor and a vacuum contact device 'adapted to energize the motor for revolution in either direction, a 'cloth feeler and connections for reversing the contacts, a fixed roll, a movable roll, a spring pressure device engaging the movable roll and cam means oscillated by the motor and having lost motion between it and the motor engaging the spring device to compress the spring and having pro-- gressively steeper cam surface as the spring is.

compressed; u

ROBERT HETHERINGTON.

'tofy