US2752151A

US2752151A - Cloth-guiding devices

Info

Publication number: US2752151A
Application number: US378280A
Authority: US
Inventors: Levine Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-09-03
Filing date: 1953-09-03
Publication date: 1956-06-26
Anticipated expiration: 1973-06-26

Description

June 26, 1956 Filed Sept. 3, 1953 FIG.2.

P. LEVINE CLOTH-GUIDING DEVICES 5 Sheets-Sheet l INVENTORZ PAUL LEVINE,

' ATTORNEY June 26, 1956 P. LEVINE 2,752,151

CLOTH-GUIDING DEVICES Filed Sept. 3, 1953 5 Sheets-Sheet 2 FIG. 8. O ma 2t June 26, 1956 P. LEVINE CLOTH-GUIDING DEVICES 5 Sheets-Sheet 3 Filed Sept. 5. 1953 m m 8 8 H T 2% 6 4. m 5/ G v m l M F A 2 P 6 \6 w 4 We 6 4 M w w 6 4 O m 2 8 O 7 m H 8 8 2 8 4 MB l 8 0M Q T, L M li. w 2 I B 1 m. +4 6 3 .13 2 OM 9| 9 2 l l. l 2 8 nd 0 l 2 G F June 26, 1956 P. LEVINE 2,752,151

CLOTH-GUIDING DEVICES Filed Sept. 3, 1953 5 Sheets-Sheet 4 FIG.I3.

INVENTOR:

PAUL L EVlNE AYTOR N EY June 26, 1956 P. LEVINE CLOTH-GUIDING DEVICES 5 Sheets-Sheet 5 Filed Sept. 5, 1953 FIG. I6. 320 l ilsse FIG. l9.

INVENTORI PAUL LEVINE,

FIG. l8.

ATTORNEY United States Patent 2,752,151 CLOTH-GUIDING DEVICES Paul Levine, Jamaica, N. Y. Application September 3, 1953, Serial No. 378,280 4 Claims. (Cl. 2712.6)

This invention relates to cloth-guiding devices and has particular reference to a means attached to a conventional cloth-cutting machine and the like, for automatically maintaining a straight-line movement of the cloth flowing through the machine, particularly to and from the cutting knives thereof.

It is an object of this invention to provide a simple and comparatively inexpensive mechanical attachment to maintain a straight-line movement of the cloth as it passes through the machine. Another object is to provide ways and means for controlling shifting of the cloth as it gets out of line by shifting it bodily without producing any substantially stretching effect on the cloth during the shifting of it. Another object is to devise ways and means including the employment of photoelectric cells automatically to control the operation of sliding slats upon a drum in a cloth-guiding machine.

This invention actually is an improvement over the apparatus shown in the patent to Meyer, No. 2,289,796, patented July 14, 1942. When that machine was de signed, it was sufiicient for a machine of that kind to guide cloth flowing at about yards per minute, whereas in these days, much more is necessary, namely, 100 yards per minute and more. Therefore, it is a major object of this invention to improve on the Meyer apparatus particularly in its quicker responsiveness to controls both as to mechanical lateral adjustability of the flowing cloth and as to the action of the photoelectric circuits.

The present invention accomplishes this control by pivotally attaching the ends of the reciprocally sliding slats to adjustably inclined parallel rim-like members that are rotatably mounted upon cam-faced sleeve elements fixed at opposite ends to a rockable shaft journalled in the end frames of a cloth-cutting machine. The sleeve elements that are rockable with the shaft to which they are fixed are formed with inclined inner cam surfaces and a boss extending therefrom, which provide bearings for the aforementioned rim-like members.

An operating and setting arm projects from and is secured to one of the cam elements and in giving the operating and setting arm a partial upward or downward rockable movement, the angle of the plane of rotation of the inclined rim-like members rotating on the cam elements may be pivotally adjusted about a point lying at their center of rotation to give the sliding slats a right or left shifting motion to move the flowing cloth correspondingly to the right or left, as may be required. This action occurs when the edge of the cloth is too far to the right or to the left of the required cutting line and the cloth, in so moving laterally, cuts light rays passing to photo-electric cells and thereby automatically energizes or de-energizes one or both photoelectric-cells. This action, in turn, sets up currents (through relays) which, in turn, energizes or de-energizes certain solenoidcontrolled valves which in turn, direct compressed air to a cylinder and piston suitably attached to the end frame of the cutting machine and at the same time adapted to open or colse solenoid-actuated valves which control complementary air-inlet and air-outlet valves connected to the cylinder. The outer end of the piston rod has pivotal connection with the aforesaid arm which extends from the cam element upon one end of the drumv shaft.

The present invention discloses a method wherein dual 2,752,151 Patented June 26, 1956 photo-electric cells may be energized by means of a single light source or by adapting a separate light source for each photo-electric cell. This invention also shows an adaptation of a single light source whose light beam is split into two component light beams, each component light beam being directed to one of two photo-electric cells or to both simultaneously.

As this inventionmay be embodied in several forms without departing from the spirit or essential characteristics thereof, the present embodiment is therefore illustrative and not restrictive, since the scope of the invention is defined by the appended claims rather than by the description preceding them, and all. changes that fall within the metes and bounds of the claims or that form their functional as well as conjointly co-operative equivalents, are therefore intended to be embraced by those claims.

Figure l is a front elevational view of a cloth-cutting machine embodying the features of this invention, and it shows parts broken away;

Fig. 2 is an enlarged fragmentary detail partly in section of one end of a drum having sliding slats. The sectional portion is taken approximately along line 22 of Fig. 3;

Fig. 3 is an end elevation of Fig. 2;

Fig. 4 is a transverse section of the drum and is taken along the broken line 4-4 of Fig. 2;

Fig. 5 is an elevational view of the drum and sliding slats which are mounted upon the frame of the machine, a part of which is shown;

Fig. 6 is an enlarged fragmentary detail view showing the method of attaching sliding slats to supporting slide rods upon the drum;

Fig. 7 is a fragmentary detail of the attachment means shown in Fig. 6;

Fig. 8 is a cross-section of same and is taken along line 83 of Fig. 6;

Fig. 9 is a schematic elevational view (in section) showing the path of cloth passing through a cloth-cutting machine and shows the method of attaching the present invention;

Fig. 10 is a diagrammatic view of the composite of three pairs of electric circuits between photo-electric cells and relays and solenoids employed in this invention and which embraces dual light sources;

Fig. 11 is a diagrammatic elevational view of the housing for the photo-electric cells and light sources;

Fig. 12 shows only a single pair of the circuits of Fig. 10, extracted from the composite showing thereof, and indicates the circuits energized during one cycle of opieration but does not show the de-energized circuits;

Fig. 13 also shows a pair of circuits withdrawn from the composite showing in Fig. 10 and shows a second cycle of operation;

Fig. 14 is still another such circuit but showing a third stage;

Fig. 15 shows an electric circuit using dual photoelec tric cells but energized by a single light source and will be hereinafter fully explained;

Fig. 16 is a schematic perspective view of an embodiment using a' single light source and dual photo-electric cells. Part of the walls are broken away to disclosethe interior;

Fig. 17 is a longitudinal sectional elevational view taken approximately along line 1717 of Fig. 16;

Fig. 18 is a diagrammatic plan view showing the interior of the lower box portion of this embodiment, and shows two electric cells being activated by light beams;

Fig. 19 is a similar diagrammatic view but shows only one of the photo-electric cells being activated;

Fig. ,20 is also a similar diagrammatic view but shows both photo-electric cells inactive; and f 3 Fig.2l is a diagrammatic plan view of another embodiment which will be further and fully explained.

Referring now to the parts in detail wherein similar reference numerals refer .to similar parts throughout, 12 designates, in general, .a conventional cloth-cutting machine having

end frames

14 and 16, a .base 18 and cross- .plates 20 upon the end frames. Extending upwardly from thetendframes are supporting members 22 having agroove orslot24 in which a rotatable shaft 26 is slidably mounted. This shaft has secured thereto a core member 28 which functions as a pick-up .roll for winding the cut cloth after it "has been processed. The cloth C (Fig. 9) is fed to the machine over a guideroller .30; thence around 90 of a zdrum .32 which is formed peripherally with longitudinallysliding slats 34; thence upwardly to and around .a guide roller 36; thence rearwardly to and over a cutter- 2anvil 38.. From the cutter-anvil it passes under a driver or puller roller 40 and from there it 'is wound around the pick-up roller 28. The weight of the pick-up roller 28 against the driver roller 40 provides sufiicient friction to impartrotation to .the pick-up roller and as the cloth wound thereon, :the pick-up roller shaft 26 slides up in 7 the grooves 24.

Circular cutting knives 42 are rotatably mounted in short bars 44 which are loosely mounted and weighted :to bring the cutting knives 42 into forcible contact with the cloth to be cut. This is accomplished by fulcmming the bars 44 carrying the cutting knives (Fig. 9), by form- 8 ing a V-cut 46 in the short end of the bar and engaging the V-cut under and against a cross-bar 48. The long :end50 of the bar 44 makes contact with a free-moving pressure bar 52, which is pivoted at one end to a crossbar 54. The free end of the pressure bar 52 engages a spring :56 for exerting pressure against same and the cutting .knives. A flat cross-bar 60 holds the upper end of the spring 56 in place and collars 62 adjustable upon the cross-bar48 allow the cutters to be shifted along the anvilroller 38. Collars 64 are also provided 'to position the pressure bar upon the cross-rod 54, or align same with bars 52. In the drawings (Fig. 1), three cutting knives are shown which will trim the edges and cut the cloth into two strips. providedif desired.

' The outer circumferential surface of the driver roller 40 and the outer surface of the sliding slats 34 may be covered with fine emery cloth, sand paper or other friction-surface material 70 and '72, respectively. Thus the contact of the cloth with the sliding slats .34 will impart a rotary motion to the drum as the driver roller 40 im parts movement .to-the cloth. To give rotarymovement to the driver roller 40, it is secured to a shaft 68 which has hearings in the end frames 14 and 16 and the end thereof whichextends through the end frame .16 (Fig. .1), has secured thereto a sprocket wheel 74 which is connected by a

link chain

76 and 78, to ,a motor 80 for activating the cloth-cutting machine.

Referring to the component parts of the drum.32, these include .the slats 34 that are slidable upon slider rods 82 securely held upon spaced-apart disc-like annular plates 84 .(Fig. 2), that are mounted'rotatably upona rockable shaft 86 that has bearings in the end frames 14 and 16. The sliding slats 34 have secured to their bottom or inner sides short slide members 88 which are formed with oppositely disposed lugs 90. These lugs 90 are formed at opposite .ends of the slides 88 and are provided 'with an orifice that slidably engages two adjacent slider rods 82. The slides 88 are secured to the sliding slats 34 by means of screws 92. The disc-like plates 84 may be held against longitudinal movement along the shaft 86 by means of a collar 94 (Fig. 2), secured upon the shaft and engaging against the inner surfaceof the annular discs 84.

' .Referring'now to those elements which complete the drum 32 and which form the essential features of this invention, 96 designates two sleeve members each carrying a cam-face at its inboard :end so hereinafter these However, additional cutters may be sleeve members will be referred to as cam members. One cam member is at each opposite end of the rockable shaft 86 and secured thereto by a set screw 98. The inner or inboard cam faces of the cam members 96 are parallelly inclined as at 100, as shown inFig. 2, and by dotted lines in Figs. 1 and 5. Projecting inwardly from these inclined surfaces are annular bosses 102 having an enlarged central orfice 104 through which the .shaft 86 passes. The annular bosses 102 are suitably secured upon the cam members '96 by means of screws 106 and provide a bearing surface for roller or ball bearings 108. The inner rings of the bearings 10.8 are held upon the bosses by lips 110 while the rotatable outer ring of the bearings is secured to an annular rim-like member 112 having around its outer periphery orifices or bores 114 in which pins 116 slidably engage. The outer ends 118 of the pins 116 are flattened as at .118 and engage in slots 120 formed upon the ends of the sliding slats 34 :and pivoted therein by pins 122 thus connecting the sliding slats .34 with the cam assembly.

Normally, the cams 96'and the shaft 86 remain unitarily stationaryagainst rotation while the slats 34 and the rimlike members .112 are given ,a rotary motion by contact with a-moving cloth passing through the machine. At the same time if desired, the slats can be given a reciprocatory sliding motion parallel to the axis of the shaft 86 through their end connections 122 with the rim-like members 112 with which the slats are rotating. This lateral sliding of the slats is accomplished by movement upwardly of thexarm 124 on the cam member 96 (dotted line posifion in Fig. 3 which moves not only the rockable shaft 86 but thecam member 96 fixed to that shaft to aposition where the inclination of the inboard face of the cam member is reversed. 'Such movement of the cam .member carries with it conjoint movement of the boss 102, their roller bearings 108, and the rim-like member 112 rotating thereon. So the inclination of the rim-like member 112 goes from one extreme as shown in full lines .in Fig. 2 when the swingable arm 124 is in its full line position as shown in Fig. 3, to the reverse when the arm 1124 isin its dotted line position. Between those two extreme positions, the rim-like members 112 take positions from sloping to the right as shown, through a vertical position, to sloping to the'left. The rim-like member 112 at the left of the machine as shown in Fig. 1 follows the same path as the right hand rim-like member because these two members are maintained parallel at all times, which is an important feature of this invention. And these rim-like members are bridged by the sliding slats 34. These slats are made slidable by being slidably supported by slides 88 slidable on rods v82 mounted cage-like in discs 84 fixed to shaft .86. Thus, a change in the angle of inclination 100 of the plane .of rotation of the right hand rim-like member 112 due to movement of arm 124, transmits the same change of inclination of :the plane of rotation to the rim-like member 112 at the other side of the machine, and this change of inclination thereby gives controlled sliding movement to the sliding slats 34. Thus, the change of inclination of the plane in which the rim-like member rotates is always about a pivot point lying at the center of rotation. It is to be noted that by the use of this invention, both cam members 96 and their rotating rimlike members 112 are set parallel to each other in their mounting on shaft 8.6, so that the cloth may be bodily moved laterally without stretching it. The arm 124 is secured by screws v126 to the outer or outboard end of one one of the outlets. By closing the upper air-inlet valve 134 and the lower air-outlet valve 140, and by opening the lower air-inlet valve 136 and the upper outlet-valve 138, compressed air may enter through the lower air-inlet valve and cause the piston to rise and force the cam arm 124 upwardly and thereby to turn the shaft 86 and its attached cam members 96, which action will change the position of pick-up and left-off of the cloth on the slats 34 because with the cam arm 124 in the upward position, the cloth contacts the drum at the point where the slats 34 are in the most right handed position and as the drum is revolved, the cloth is carried to the left by the lateral movement of the slats. Conversely or vice versa, by closing the lower inlet valve 136 and the upper air-outlet valve 138, and opening

valves

134 and 140 compressed air may enter through the upper air-inlet valve 134 and cause the piston to move downwardly. When, however, it is desired to maintain the cam arm in a fixed position, both air-inlet valves are opened, while both air-outlet valves are closed. Compressed air then entering through both upper and

lower inlet valves

134 and 136, equal air pressure will be exerted against both sides of the piston in the cylinder 139 and the piston and connected cam arm will be held immovable. These various valve actions are automatically accomplished in their proper order by the means set forth in this invention, and they will now be described:

A box or cabinet 142 supported upon a bracket 144 which extends from and is attached to the end frame 16 (Figs. 1 and 9), is divided into four compartments, diagrammatically shown in Fig. 11 which has two lower compartments 146 and 148, and two

upper compartments

158 and 152.

Curved bracket arms

154 and 156 extend from the cabinet and carry

light reflecting units

158 and 160, respectively. Within the

compartments

146 and 152 there are mounted photo-

electric cells

162 and 164, respectively, and in the compartments 148 and 150 there are mounted

light bulbs

166 and 168, respectively.

It will be observed that the arrangement of the photoelectric cells and the light bulbs at light sources are arranged in the cabinet in off-set or staggered vertical alignment so that the light beam from the bulb in one compartment throws a light beam which is reflected toward the photo-electric cell, slightly in advance of the light source from the second light chamber, with respect to the position of the edge of the cloth. Thus the edge of the cloth as it moves partly into the light beams, will intercept first one beam and by further movement intercept the second light beam. Figure 11 best shows the staggered or off-set vertical alignment of the light bulbs and photo-electric cells. Figs. 10, 12, 13 and 14 show the two light beams, in plan. When a light beam 170 from the light source 166 is projected to the reflector 160, it is reflected along line 172 back to the photo-electric cell 164. (See Fig. 10.) Similarly, when a light beam 174 from the light source 168 is projected to the reflector 158, it is turned back or reflected along line 176 to photo-electric cell 162. The photo-electric cell 162 has electrical contact (not shown) with a relay switch 17 8, shown diagrammatically in the circuit diagrams, while the photo-electric cell 164 has an electrical connection (not shown) with a second relay switch 188. The complete relay switches being conventional, are not shown. The armature or switch

arms

182 and 184, are however diagrammatically shown as are their

contact points

186 and 188 for the relay 178 and

contact points

190 and 192 for the relay 181). The two air-

inlet valves

134 and 136 are each provided with a

solenoid attachment

194 and 196, respectively, and the two air-outlet valves are each provided with a

solenoid attachment

198 and 200, respectively, all of which are energized through circuits leading from an electric source and controlled by the photo-electric cells and their connected relayspand their sequence. of operation will now be described:

Fig. -shows a composite view of the three pairs of circuits while Fig. 12 shows only a single pair of energized circuits without showing the de-energized circuits. Fig. 12 shows the position of the relays (see switch arms 182 and 184) that close two circuits, one of which energizes the solenoid 198 to open the outlet valve 138 while a second circuit energizes the relay 196 to open the inlet valve 136. The solenoids 194 for the inlet valve 134 and the solenoid 200 for the outlet valve are not energized and the electric circuits are not shown. When these solenoids are energized, the piston moves upwardly in the cylinder 130. In the next cycle, shown in Fig. 13, solenoids 194 for inlet valve 134 are solenoid 196 for valve 136 are energized to open the

respective valves

134 and 136, to direct air pressure to both sides of the piston to hold it stationary. In the next cycle, Fig. 14, the solenoids 194 and 260 open their

respective valves

134 and 140, which drives the piston downwardly. In Figs. 12, 13 and 14, valves and solenoid that have no circuit connections normally remain closed.

Assuming now that the machine is in operation, the light sources illuminated and the cloth moving through the machine, the edge of the cloth C (Figs. 10 and 12) being free of the light beams and thus not interfering with their rays and 174 to the reflector and back, rays 172 and 176, to the photo-

electric cells

164 and 162, respectively, the

switch arms

182 and 184, through the action of the energized photo-

electric cells

162 and 164, engage the contact points 192 and 188, respectively. Considering the relay 178, the current flow is as follows:

From the electric source B through line 202, the contact point 188, line 204 to solenoid 196, through solenoid to line 206 and back to source 13, thus energizing solenoid 196 to open valve 136, at the same time a current flow is directed from the electric source B through the line 208 to contact point 192, line 218 to solenoid 198 to open valve 138, through solenoid to line 212 and back to source B The

valves

134 and 140 remain closed. With this setting compressed air enters through the open valve 136 and drives the piston in the cylinder 130 upwardly. This action, through its connection with the piston rod 128 will impart a partial rotation to the cam members 96 rotating the inclined rim-like members 112 and moving the slide slats to bring the edge of the cloth to the right. While the circuits just mentioned are shown in the composite diagram of Fig. 10, they may be more easily followed by referring to Fig. 12. The omitted circuits in Figs. 12, 13 and 14 are the inoperative circuits with the settings shown. Valves and solenoids not shown in circuits in the figures mentioned, remain closed.

When the edge of the cloth C has moved to the right and to the position shown in Fig. 13, it cuts off the light beam 174 emanating from the light source 168 and deenergizes the photo-electric cell 162. When the edge of the cloth has moved thus far to the right, it has reached the established point for a straight-line cut and the circuits that become operative are as follows: The circuit lines to the valve 136 which remains open are similar to those shown in Fig. 12, the switch arm 182 of the relay remaining closed. The switch arm 184 of the relay 180, however, has been released and has made contact with the contact point to close a circuit which leads from the electric source B1 through line 218 through switch arm 184 to contact point 190, through line 218 to solenoid 194 of valve 134, through solenoid and line 220 back to electric source B thereby opening the valve 134. At this stage the

valves

138 and 140 are closed and compressed air is allowed to enter through the upper and

lower inlet valves

134 and 136 and exert pressure to both sides of the piston in the cylinder 130 and hold the cloth in the position shown, thereby making straightline cuts in the cloth.

Fig. l4 shows the end of the cloth C further advanced toward the right and intercepting the direct beam 174 and the reflected beam 172, thereby de-energizing both photo-electric cells which releases both switch

arms

182 and 184 and establishes current flowto the solenoids 194 7 13. The direct light beam 174 and the reflected light beam 172 are spaced apart, at a distance of approximately one-fourth an inch and when the edge of the cloth C,

reaches approximately half way into this space, the straight-line cut is established and maintained by the set-up shown in Fig. 13.

Fig. 15 shows an embodiment in which a single light source 222 impinges light beams upon two photo-electric cells 162' and 164, which, in turn, are energized or deenergized in accordance with the movement of the edge of theclo'th into or out-of the path of the light beams. In this view, the end of the cloth C is shown in full lines, its middle position being shown by the dotted line C and its farthest right position by dash line C With the cloth edge to the left of the light beams the switch arms 182' and 184' are set as shown by the full lines. A circuit is then established which leads from the electric source 'B through the switch arm 184' to the line 210', to the solenoid 198, through the solenoid to line 212' back to the electric source B thereby opening outlet :valve 138. A second circuit leads from the electric source B through the switch arm 182' (shown in full line) to line 204 through solenoid 196 into line 296' back to current source B thereby opening inlet valve 136, thus driving the piston upwardly. In the next stage (similar to that shown in Fig. 13), the circuit through V the switch arm 182' and the solenoid 196 to open the inlet valve 136', remains the same. The arm 184', however, being released by the de-energized photo-electric cell 164', drops to the position shown by the dotted line and a circuit is then established which leads from the source B through the switch arm 184' (which has dropped to the position shown by the dotted line), to line 218, through solenoid 194' to line 212 back to current source B thereby opening inlet valve 134'. This set-up holds the piston stationa y, as is accomplished in the set-up shown in Fig. 13. The final stage, when the cloth cuts ofi both light beams, the switch arm 182' also drops to the position shown by a dotted line and sets up a current flow from the source B to the line 224, to solenoid 200, through solenoid to branch line 206 into 206' back to current source B thus opening valves 194 and 200' and driving the piston downwardly.

Attention is now directed to Figs. 16 to 21, inclusive, which show a modified form embracing the principle of this invention and comprises a box or housing 310 containing a pair of photo-

electric cells

312 and 314. The.

front wall of the housing is formed with an orifice 316. Aligned with this orifice there is mounted upon the rear Wall of the housing a convex reflecting lens 318 designed to 'andadapted'to split a single light beam which impinges upon it, into two component light beams and reflect the two beams in different directions as we shall further on explain.

Attached to the top of the housing 310 and tilted for ward at -a slight angle, there is a second smaller housing 320 within which there is mounted a single light bulb 322 backed by a reflector 324. An orifice 326 is provided in the front wall of the small housing 320 and is aligned with the light bulb 322 and the reflector 324 behind it. Projecting from one side of the large housing 310, there is a bracket arm 323 which carlies upon its outer face end a reflector element 330 which is aligned with the orifice 316 and convex reflector 318 in the large housing 310. A light beam 332 emanating from the light source 322 and projecting through orifice 326 (which may be provided with a condenser lens 350) is impinged upon a the reflector 330, from there projected in a pencil type of light beam 334, through -the orifice 31,6 and into the large housing 310 to strike the convex lens-reflector ele ment 318 where-it is split into two component light beams 334' and 334" {Big 18) Partition members 336 and Fig. 18 shows the'edge of thecloth C drawn away from.

the light beam 334 which is free, in its entirety, to project to the convex lens reflector 318 where it is split into two reflected beams 334' and 334" and energizes both photo-

electric cells

312 and 314. Fig. l9 shows the edge of the cloth C partly obstructing the light beam 334, allowing approximately one-half 334 of same to project to the convex lens reflector 318 and from there project the half beam 334 to the photo-electric cell 312. Fig. 20 shows the cloth C intercepting the full light 'beam334 and shows both photo-electric cells de-energized. With this modified light-beam controlling means, the same circuits and circuit controls to the solenoids and connected valves, as already described, may be set up.

in Fig. 21, there is shown a variation wherein the convex lens reflector is -substituted by a mirror reflector unit which comprises a pair of angularly arranged mirror plates 338 and 344). The photo-electric cells 312 and '314 in this form are entirely enclosed in

separate compartments

342 and 344 formed'by partitions 346 and 348, provided with orifices in which lens 351 and352 may be mounted. Another feature of these light-reflecting units is that since the

light beams

332 and 334 are in vertical alignment, the cloth will out both beams at the same time thereby giving a greater variation of the amount of light impinging on the photo-electric cells so that an open weave cloth or web may be guided.

In Fig. 9 flexible conduits carrying the various circuit lines are shown diagrammatically superimposed upon the figure and flexible air tubes (not shown) are supplied to direct compressed air to the cylinder assembly.

I claim:

1. In a cloth-guiding devicehaving a roller on which cloth is to be wound into 'a roll, (and means for guiding the cloth flowing thereto in a laterally straight path including cloth-shifting means having a rotatable drum with reciprocally sliding slats on its periphery whereby the drum and the slats are rotated unitarily by the cloth passing therearound; the improvement comprising a rockable shaft from which the drum is rotatably supported, a cam-faced sleeve member fixed to the rockable shaft at each end thereof with each cam-face facing inwardly, an annular rim member rotatably supported from each sleeve'and to which the slats are pivotally fastened, and automatic means for pivotally changing the plane in which the rim members rotate about a point lying at their center of rotation by rockably adjusting the shaft with the cam-faced sleeve'members fixed thereto while the rim members are rotating thereon.

2. Apparatus according to claim ,1, with the addition of a boss extending from the cam-face of each sleeve means about which the rim member rotates.

3. Apparatus according to claim 1, with the addition .of arm means extending from at least one of the sleeve members through which the rockable shaft is adjusted for changing the plane of rotation of both :rim members.

4. Apparatus according to claim 1, withthefaddition of arm means extending fromone of thesleeve members through which the rockable shaft is adjusted for changing the plane of rotation of both rimmembers, hydraulic means for controlling the position of the arm means, and photo-electric cell means for regulating operation of the hydraulic means.

References Cited in the file of this patent UNITED STATES PATENTS 2,082,634 Johnstone June 1, 1937 2,195,006 Gulliksen Mar. 26, 1940 2,312,182 Meyer Feb. ,23, 1943 2,332,104 Meyer n- Oct. 19,- .1943 2,451,343 Oct. 12,4948,