US2930543A - Winding machine - Google Patents

Description

March 29, 1960 w. v. GOODHUE ET AL 2,930,543

WINDING MACHINE Original Filed April 26, 1951 2 Sheets-Sheet 1 INVENTO WILLIAM V. 600 UE By FRANK w. HIGGINS AT TORNE Y March 29, 1960 w. v. GOODHUE ET AL 2,930,543

WINDING MACHINE Original Filed April 26, 1951 '2 Sheets-Sheet 2 III/II VIIIIIIIII 52172121 0119: WILLIAM V. GOODHUE FRANK w. HIGGINS 2,930,543 WINDING MACHINE William V. Goodhue, North Kingstown, Rl, and Frank W. Higgins, Wareham, Mass., assignors to Leesona Corporation, a corporation of Massachusetts Claims. (Cl. 242-150),

This invention relates to winding machines for wind in'g yarn or like strandular materials into cops, cones and other forms of packages and is a division of our copending application Serial No. 223,022, filed April 26, 1951, now Patent No. 2,764,362.

In the present specification and claims the term yarn is used in a general sense to designate all types of attenuated materials and the term package is employed for convenience of description to apply to any usual form of wound mass. I

One object is to provide in a machine of the type indicated means for opening the tension-device to receive the new end and means for opening the slub-catchers.

Another object is to provide in a machine of the type indicated means for applying jets of air to the tensiondevice'and slub-catchers as they are opened whereby to remove the lint, flulf or other foreign particles therefrom and valve-means for automatically operating the jets.

Further objects of the invention are set forth in the following specification which describes a preferred form of construction of the present invention by way of example as illustrated by the accompanying drawings. the drawings:

Fig. 1 is a perspective view illustrating the tension assembly of the present invention mounted in its operating position on the frame of a winding machine of the type disclosed in United States Patent No. 2,764,362;

Fig. 2 is a plan view of the tension-assembly including the pair ofslub-catchers and the means for cleaning. the elements with air-jets; 1

Fig. 3 is a part-sectional side elevational view of the tension-assembly taken on line 7-7 of Fig. 2;

Figs. 4 and 5 are detailed views of the tension-device and the means for shifting the reserve supply yarn into position to be picked up by the tension-nozzle;

Figs. 6 and 7 are part-sectional detailed views of the same;

Fig. 8 is a fragmentary bottom plan view of one of the operating shafts of the tension-assembly; and

Fig. 9 is a part-sectional view in elevation showing the means for opening the slub-catchers. I

In a winding machine of the type disclosed in said Patent No. 2,764,362 means for retaining spare yarn end in reserve; means for threading the spare yarn between tension-disks; and the other instrumentalities cooperating therewith are mounted in a group, called the tension,- assembly, which is carried by a bracket 39 projecting forwardly from the frame which in turn is mounted on bed 2. The tension-assembly mounting consists in a relatively flat panel 40 supported in inclined relationship by the bracket 39 that is bolted to a U-shaped yoke 41 fastened to the sides of the frame 20 of a winding machine. Fastened to the forward end of the panel 40 is a yarnguide inthe form of a plate 42 having its lower portion curved inwardly angi rearwardly. 'The upper portion of the guide-plate 42 is formed with a slot 43 having a reentrantopening at the top and extending downwardlyat an; a e w t a e a ire ys o om ro t oa 45- at.

' nited States Fatent" ingthe yarn y to slide down into position acrossitsver:

0 at the side of the tapered finger the bottom. The right-hand edge of the slot 43 recedes arcuately toward the top of the plate 42 while to the left of the re-entrant opening of the slot is an upstanding finger 44 tapered to a rounded point at the top; The running yarn y is guided in the lateral extension 45 at the lower end of the slot 43 in the plate 42 as it feeds to the tension-device and thence to the winding package; while the spare end y is normally held in reserve on a rest 46 formed by a shoulder on the edge of the slot 43 44, being retained in this reserve position by the arcuate edge of a detention lever 47.

The detention lever 47 is mounted fast on the forward flatted portion of a rod or rock-shaft 50 which extends longitudinally beneath the panel 40 with its terminal portions rotatable in suitable bearings at the ends thereof. A second rock-shaft 51 is similarly mounted in bearings on the under side of the panel 40 in parallel spaced relation to the shaft 50. These two shafts 50 and 51 carry the several elements which function cooperatively for threading the spare end y down into the guiding slot 45 of the plate 42 and also into the tension-device during consists in an elbow-shaped arm, see Fig. 4, extending laterally from a hubportion 52fast on the rock-shaft 50 and rising upwardly in a skeleton head having a vertical arm and a curved portion 53 fonning'it's arcuate edge. With the lever 47 in normal position as illustrated in Fig. 4 the arcuate edge of its curved portion 53 cooperates with the edge of the tapered finger 44 to form a sort of crotch for retaining three in number as herein single hub-portion 62 fastened to the rock-shaft 50, see Figs. 1, 2 and 3. The horizontal arms of the fingers 61 are normally supported slightly above the yarn y feeding across the bars of the grid 60, being sustained in this relationship by latching means, as described in United States Patent No. 2,764,362, which act to prevent the shaft 50 from rocking. The detectorshown, extending from a fingers 61 have angular extensions 63 projecting upwardly;

66 is formed with a slot 68 through which the screw 67- extends. The guide-member 65 comprises an upright blade with an inclined upper edge which assists in cans- 51 after the yarn y'from the.

in place by one of the screws.

' genesis tical edge, thereby serving to retain it in the tensiondevice.

The tension-device may comprise the usual concavoconvex disks 70 rotatably mounted on a pin 71 which is slidablethrough the bore of a boss 72 on the under side of the-panel 40. The pin 71 has a shouldered enlargement 73, see Fig. 5, located in position to engage with and lift one or more weights 74 which apply pressure to the upper disk 70, whereby to relieve the pressure thereon as the yarn is threaded into the tension-device. The weight 74 normally bears against a felt washer 75 to press the upper tension-disk towards the lower disk and apply resistance to the passage of the yarn therebetween. A helical spring 76 encircling the pin 71 between asplit ring 77 and the bearing boss 72 acts to normally draw the pin downwardly.

Mounted fast on the opposite rock-shaft 51 is a lever 80 arranged with its end engaging under the end of the pin 71 to adapt it to slide the pin upwardly against the tension of the spring 76, whereby to remove the pressure of the weight 74 on the upper tension-disk 70 and thereby open the tension-device for threading the yarn between the disks. Means are provided for cleaning the tension-disks when they are thus opened by blowing lint or any other foreign particles therefrom. The tension-disks 70 are cleaned by air-jets projected from a tube 82 having a semicircular portion partially surrounding the periphery of the disks. and provided with small orifices (not shown) on its side for emission of the air forced through the tube. The semicircular portion of the tube 82 serves as a guide for directing the yarn into place between the tension-disks 70 and has an extension 83 projecting upwardly at one end and terminating in a loop at the top. This extension 83 of the tube 82 serves as a guard to direct the yarn down under its semi-circular portion. The upper end of the tube extension 83 is also provided with an orifice for projecting an air-jet across the detector-fingers 61 to remove the lint accumulation therefrom. A straight length of the tube 82 is supported in a lug 84 rising from the side of the panel 40 with the end of the tube projecting therefrom and connected to a flexible hose 85 through which the'air is supplied. The air-hose 85 is connected to a pipe-T 86 on the side of the bracket 39, see Fig. 1, and thence to a valve 92 in the supply line from a suitable source of compressed air, not herein shown.

A branch hose 87 from the T 86 extends across the underside of the panel 40 for connection to another tube 88 employed for cleaning the slub-catchers mounted at the rearward end of the panel 40. The 'slub-catcher cleaning tube 88 overlies the side of the panel 40with a length bent downwardly and fastened at its end to a union 89 mounted on the bracket 39. The tube 88 may be fastened to the panel 40 by a clamp 90. The branch hose 87 which extends from the three-way pipe-T 86 is connected to the union 89. From the pipe-T 86 a hose 91 leads to the air-valve 92 shown in Fig. l. The airvalve 92 may be of any suitable construction, preferably of the plunger-operated type as illustrated in Fig. 1, with its plunger 93 adapted to be forced downwardly by lever 433 through link 432 to open the valve through the operation of certain instrumentalities as described in United States Patent No. 2,764,362.

Mounted at the rearward or upper end of the panel 40 is a pair of slub-catchers 95, see Figs. 1,2 and 3, for cleaning theyar'n before it feeds to the winding pack; age. The slub-catchers 95 areof usual construction, each comprising a lo'wer fixedblade 97 and an upper hinged blade 98 pivoted on a rod 99 with a spring 100 for rock; ing the upper blade to maintain its lower edg'e'in sp'aeed relation to the edge of the lower blade. The rods99 are supported in bearings 101 on standards 102 formed as a part of the panel 40. The upper blade 98 of each slub-catcher has an arm 103 projecting "at the letters; viewed in Figs. 2 and 9 "and overlying the ender plunger-pin 105. which is slidable in the bore of a bearing forming part of the standard 102. The lower end of the plunger-pin 105 is engaged by the end of a lever 107, see detailed view Fig. 9, secured fast on the rock-shaft 51 so that when the latter is toeked the lever 107 will slide the pin upwardly and thereby rock the upper blade 98 of the slub-catcher 95 to open the latter as shown in Fig. 3 torthreading the yarn thereinto. When opened the slub-catchers are cleaned by air-jets emitted from the tube 88, previously referred to as connected through the union 89 and pipe-T 86 to the hose 91 from the valve 92, see Fig. 2. The tube 88 has iet'orifice's on its side directed toward the openings between the blades of the slub-catchers 95. Another orifice at the bend in the tube 88 causes an air-jet to be ejected therefrom along the crossbar 633 of the breakage-lever 625 to remove any length of yarn tending to cling thereto when the yarn is broken.

Supported rearwardly beyond the sluts-catchers 95 is a plate-like guard 115 fastened to the rearward standard 102 with its lower rounded edge in position to adapt the yarn to feed thereunder. Beyond the edge of the guard 115 is a wire bail 116 arranged parallel therewith and under which the yarn feeds, the wire having a rightangular bent portion fastened in a bore at the end of the panel 40.

It has been stated that the end of the spare yarn y is held in reserve resting on the shoulder 46 in the guidethe clip lever 120 carfie's a plate 42, see Fig. 1, and retained in place by the lever 47. A transfer lever 120, see Fig. 7, mounted to turn on the rock-shaft 51, extends upwardly therefrom through an opening in the panel 40, being provided with a clip 121 at its upper end for seizing the end of the reserve yarn y. The lower end of the lever 120 has a bifurcated hub-portion with bores in its bifurcations that serve as bearings for pivotally supporting the lever on the rockshaft 51. The upper terminal portion of the lever 120 is bent outwardly at an angle to adapt it to cooperate with a reversely-bent angular extension of the clip 121, thus forming a crotch therebetween into which the end of the yarn y may be inserted and 'carried down between the main arm of the lever-and the parallel portionof the clip .to grip it therein. The clip 121 is rockably mounted on the upright arm of the lever 120 by means of its laterally-projecting finger 122 engaging loosely through a slot in the arm. A leaf-spring 123 fastened to the rearward side of the lever 120 with its offset portion bearing against the back of the clip 121 :tends to hold the latter pressed against the yarn y to' bind it to the lever. The clip-lever 120 is normally held cocked in upright relationship as shown' in Fig. 11 by latching means arranged below the panel 40 "and mounted on the opposite rock-shaft 50. t

A helical spring 125, see Fig. 8, is coiled around the rock-shaft 51 and has one end engaged across a portion of the panel 40 with its other end hooked through a hole in one of the bifurcations of the hub of the lever 120. The spring 125 acts to rock the clip-lever 120 downwardly toward the top of the panel 40 to draw the end of the reserve yarn y into place to thread it between the tension-disks 70. Moverrient of the lever H20 in this direction is limitedby the end of a stud 126 in the side as the bracket 39, see" Fig. 6, engaging with the bent end- 127 of a downwardly-exteiiding' latchingarm-128 on the lever 120. The ii'pri'g htportion of 'laterally extending wire rod 1 29 terminating in a -right-ang'ular en's'ioii 130, this .rod being used for rocking insane-lever upwai dly and rearwardly to latchit in its up'r i" htpbsition-in the manner later explained. v

-Referring to'Figs. '6"*an'd' 7. a latching lever 1 35 has its bifurcated hub-portion' secufed Tast on the foclishaft se. The pper arm 136 of the "latbhinglever 13's is inclined downward and-then upwardly near-it ms in a sert er rok-, the refiner assass ns-"w nesis-adat to be engaged by the right-angular bent-end 127 of the latching arm 128 on the is swung back into upright position to cock it in this relationship. Projecting downwardly from the upper arm 136 of the latching lever 135 is a vertical extension 137 carrying a bent or crooked arm 138 shaped like the end of the upper arm but somewhat shorter. The bent end 127 of the latching ann 128 on the clip-lever 120 is adapted to engage with the under edge of the bent end of the upper arm 136 of the latching lever 135 to raise the latter and permit the end of the latching arm to enter between the two arms 136 and 138 of the latching lever and be held by the crook in its lower arm, see Fig. 7, against the force of the coiled spring 125 on the shaft 51. The latching lever 135 is maintained raised in engagement with the latching arm 128 on the clip-lever 120 by means of a hooked lever 140 having a bifurcated hub-portion rotatably mounted on the rockshaft 51 and normally held in the position shown in Fig. 7 under the tension of a spring 141 coiled around theshaft 51, see Fig. 8. A stud 142 supported in an ear 143 on the upper arm 144 of the lever 140 with its end adapted to engage against the top of the panel 40 acts to limit the rocking motion of said lever 140 under the tension of the spring 141. The hooked end of the lever 140 terminates in an inclined cam-edge 145 adapted to slidably engage with a finger 146 projecting laterally from the lower portion of the latching lever 135 and thereby cause said finger to enter into locking engagement with the hooked end of said lever 140, see Fig. 7, to maintain the clip-lever 120 latched in upright posit-ion. A lever 147 has its bifurcated hub-portion secured fast on the rock-shaft 51 by a screw 148 and terminates in a right-angular bent arm 149, see Fig. 8. The arm 149 overlies the upper portion of the lever 140 to rock it downwardly so as to cause the finger 146 to be released from the cam-edge 145 of the lever 140'.

The release of the latching means for the yarn-clip lever 120 is eiiected by the operation of a cam-lever 150 mounted fast on the shaft 51 and employed for rocking the latter. As shown most clearly in Fig. 6, the cam-lever 150 consists of a U-shaped wire arm 151 having one terminal portion bent around the rock-shaft 51 and secured fixedly thereto by means of a binderscrew 152. The opposite end of the U-shaped lever 150 has fastened thereto a cam-plate 153 of substantially ovateshape in outline. The upper edge of the camplate 153 is of arcuate contour extending inwardly towards the center of the panel 40 with its under edge of reversely-curved contour and joining the upper edge in a circular end. The cam-lever 150 is actuated to oscilheld by the clip 121'on the lever' l20 when the latter i s inlits depressed relationship shown'in Fig. 6; The end of the tension-nozzle 155 continues its "movement from the cam -plate 153 to engage the laterally-extending rod 129 on the clip-lever120 and rock the latter into up ight position, thereby cocking ,it to be held by its latching means described above.

Cami-plate 153'alongits curved edge to "lift the lever 150 and oscillate the lever 80 on slide the pin-71 upwardly for raising the weight 74 from the clip-lever 120' when the latte'r On the return motion: ifthe tension-nozzle 155 the finger 180 rides under the t I the rock-shaft 51 to ppe'r'tension-disk 70- inthe manner and for the pur sesame,

the clip-lever posemore fully explained in-United States Patent. No. 2.764.362. Q

The foregoing mechanism operates in the following described manner:

The yarn y from a bobbin or other suitable source of supply, supported therebelow but not herein illustrated, is drawn up and entered in the guide slot 45 of the end-plate 42 on the tension-assembly, see Fig. 1, then led under the slack-lever 55 and the detector-fingers 61 to lie across the bars of the grid 60. The yarn y is then carried down along the vertical extension 83' of the tubular guide 82 to cause it to draw under the circular portion of the guide and enter between the contacting faces of the tension-disks 70. From the tensiondisks 70 the yarn is entered between the blades of the dual slu-b-catchers 95, and under the lower edge of the guide-plate 115, thence above the crossbar 633 of the breakage lever 625 and under the horizontal portion of the wire guide 116. From the tension-assembly the yarn is led upwardly to a winding machine preferably of the type disclosed in United States Patent No. 2,764,362.

A spare or reserve yarn y supplied from another bobbin arranged below is led upwardly therefrom and carried across the shoulder 46 onthe guide plate 42, thence across the slack-lever 55 in its notch 57 and finally to where its end is engaged in the springclip 121, see Fig. 7, to hold the strand under tension.

During the interval that the slub-catcherblades 98 are held open by the levers 1'07 and whilethe tension-disks 70 are separated slightly the pneumatic means are operated to release jets of air from the supply pipes 82 and 88, see Fig. 2, for cleaning these parts. This is accomplished by opening the valve 92 on the side of the frame 20, see Fig. 1, during the downward rocking motion of the lever 433, previously referred to, to cause the stud 588 to depress the plunger 93 and open the valve 92. A suitable source of compressed air is supplied to the valve 92 through the pipe 94, shown in Fig.

1, so that jets are emitted from the side of the pipe 88 blades of the slubcatchers 9'5; and a series of jets from the circular portion of the pipe 82 are sprayed across the opposed faces of the tension-disks 70 to clean the lint and other foreign matter from their surfaces.

from an orifice in the end ing its return movement the lovers 107 and the lever 30,

which have opened the slub-catchers and tension-device are both returned to first position as the cam-lever drops back to its normal relationship. The pivoted blades 98 of the slob-catchers 95 the cam-lever 150 has been depressed. As the mouth 1'81 rides along the cam the lever 150 so that the shaft 51 is rocked in clockwise of the nozzle swingsto ward the center ofthe tension-assernbly the finger 153- and depresses guide-tube 82 to sense" v 7 Fig. 7, and rock edge 145 from the finger 146 on the latching lever 1 35. As the latching lever 135 is released in this manner gravity causes it to swing downwardly into the position shown in Fig. 6, thereby rocking the shaft 50 in contraclockwise direction. The detector-fingers 63 will then be swung down through the slots in the grid 60, since no yarn remains thereunder to sustain them. As the shaft 50 is rocked contraclockwi'se the detentionlever 47 will likewise swing downwardly, see Fig. 5, to cause its end to pass under the yarn if for releasing it to enter the slot 43 in the guide-plate 442 shown in Pig. 1. At this point the notched shoulder 57 on the slacklever 55 applies a drag on the yarn and as the lever swings downwardly it takes up any slack in the yarn. Meanwhile, the lower arm 138 ofth'e latching lever 135, see Fig. 7, has released the latching arm 123 to cause the latter to swing into the position shown in Fig. 6 and engage against the limiting stud 126. The clip-lever 120 is thus released to cause its spring 125 to rock it downwardly and carry the end of the yarn y held inthe clip 121 into position to be sucked into the mouth of the nozzle 155 as the latter continues its movement along the cam 1-53 on the lever 150. As the clip-lever 1'20 is swung downwardly in this manner it will draw the yarn y laterally v 82 at the side of the tension-disks 70. Continued movement of the suction-nozzle 155 while its cap 181 is still open will cause the yarn to be sucked into the nozzle and as soon as the finger 180 on the cap rides off from the end of the cam 153 the cap will be closed by the suction to seize the yarn y against the mouth of the nozzle.

As before explained, the tension-nozzle 155 continues its movement across the tension-assembly to engage it with the rod 129 on the clip-lever 120 and swing said lever back slightly beyond its vertical position to cause it to be cocked by the latching means. When the cliplever 12!) is rocked in contraclockwi-se direction against the tension of its spring 125 its latching arm 12%; is swung upwardly and as the finger 180 on the cap 131 rides off from the end of the cam 153 the spring 141, see Fig. 8, rocks the hooked lever 140 and shaft 51 contraclockwise to engage 149 of the lever 147. The hooked lever 140 is thus swung upwardly to cause the end of its hooked portion to contact the finger 146 on the lever 145, see Fig. 6. Continued movement of the nozzle 155 against the rod 129 on the clip-lever 120 will swingthe bent end 127 of the latching arm 128 against the upper arm 136 of the latching lever 135 to rock it in clockwise direction and cause the finger 146 to slide off from the end of the hooked lever 140 and engage the cam-edge 145, see Fig. 7, to retain the shaft 50 in its initial position. As the shaft 50 is rocked clockwise the detention-lever 47, the slack-yarn take-up lever 55, and the detector-fingers 63 will also be rocked clockwise to restore them to initial position. At this juncture the clip-lever 129 will have rocked to its extreme rearward position and the nozzle 155 will have completed its movement across the tensionassembly. Then as the nozzle 155 starts to swing back in the opposite direction the clip-lever 125) is released so that the latching arm 128 will be rocked downwardly to engage it's bent end 127 "across the lower arm 13% of the latching lever "135 as shown in Fig. 7 to hold the cliplever cooked in vertical position. During the movement of the nozzle 155 back towards the knotter the spare yarn y" w'illbe drawn under the circular portion of the thread it between the tensiondisks 70, and as the yarn lides'along the upper edge'of the guidemember 65 and down "across its vertical edge it will be drawn in under the detector-fingers 63 to the delivering position 'sh'owniniFi'g. 2.

With the tension assembgly elements restored to initial position a fresh bobbin is sup lied, the yarn therefrom the latter downwardly to release its can against the upright extensio n 83 of the guide the lever with the bent endthreaded through the guiding means and its end 851 to make it ready tened in the clip 121 on the lever for retrieving and joining to the end on the package when the previously-joined end is exhausted from the supply bobbin.

While the machine is herein shown and described as embodied in a preferred form of construction, modifications may be made in the structure and arrangement of its mechanisms within the scope of the invention as expressed in the following claims. Therefore, without limiting ourselves in this respect, we claim:

1. In a winding machine having means for rotating a package to wind yarn thereon, a tension-device for applying tension to the yarn feeding to the package, a' tube disposed adjacent the tension-device and having jetorificcs on its side, means connecting said tube with a source of compressed air, a valve for controlling the admission of air to the tube, and means operable in the absence of yarn to be wound to open the valve to cause jets of air to be emitted from the tube to remove lint and other foreign particles from the tension-device.

2. In a winding machine having means for rotating a package to wind yarn thereon, a tension-device comprising associated members for engaging the yarn feeding to the package to apply tension thereto, means to separate said members to open the tension-device, to tube disposed adjacent said tension-members and provided with orifices on its side, and means to supply compressed air to said tube to cause jets of air to be emitted through the orifices in the tube to remove lint and other foreign particles from the tension-members while they are separated.

3. In a winding machine having means for rotatably supporting a package to wind yarn thereon, a tensiondevice having associated disks between which the yarn feeds to apply tension thereto, means for rotatably supporting the tension-disks, a weight for applying pressure to one of the disks, means for lifting the weight to release the pressure on said disk, a tubular member disposed circumferentially of said disks and formed with orifices on its side, and means to supply compressed air to the tubular member to cause jets of air to be emitted therefrom between the tension-disks to remove lint and other foreign particles therefrom while said one disk is free of pressure.

4. In a winding machine having means for rotatably supporting a package to wind yarn thereon, the combination therewith of a tension-assembly comprising a pair of tension-disks between which the yarn feeds to the package, a grid comprising spaced bars across which the yarn draws in feeding to the tension-device mounted in close proximity to said tension assembly, feeler-fingers arranged above said grid, a tube including an arcuate portion surrounding the tension-device and an upstanding extension, said tube having at least one orifice in said arcuate portion directed towards said assembly and at least one orifice in said extension directed towards said grid, and means for supplying air to the tube to cause jets to be emitted through said orifices to remove lint and other particles from both the tension-device and grid.

5. In a winding machine having means for rotating 1; package to wind yarn thereon, the combination therewith of a tension-assembly including a pair of tension? disks, means for opening said disks a slub-catcher for cleaning the yarn as it feeds from the tension-device to the package, means for opening of compressed air, .a tube extending adjacent the tensiondevice and formed with orifices in its wall directed towards said tension assembly, a tube located adjacent the slub-catcher and having orifices directed towards said stub-catcher, means for connecting said tubes with a source of compressed air, a valve, and meansfor opening the valve to admit eZair to both the tubes-simultaneously and causes jets to be emitted from said orifices the slab-catcher, asource for cleaning the tension-device same are open.

and dub-catcher while the Glazier et a1. Vickers Anderson Ian. 30, 1923 June 17, 1924 Oct. 11, 1932 10 Winslow -1 Feb. 17, 1942 Brngger Mar. 16, 1948 Bdrtholomew Sept. 28, 1948 Swanson Dec. 23, 1952 Heizer et al. Dec. 8, 1953 Klein Mar. 13, 1956 FOREIGN PATENTS France Apr. 8, 1953

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