US2946300A - Machines for fastening strips to other work - Google Patents

Description

July 26, 1960 E QUINN ETAL 2,946,300

MACHINES FOR FASTENING STRIPS TO OTHER WORK Filed June 19, 1957 2 Sheets-Sheet 1 In ven form Edward Quinn VZZZ) ur PVZZZ" July 26, 1960 E. QUINN ETAI- 2,946,300

- MACHINES FOR FASTENING STRIPS TO OTHER WORK Filed June 19, 1957 2 Sheets-Sheet 2 l I v Z Inventors g' Edward Quinn Z! 4i Wilbur W1}:-

I 15 13 zorney xx I United States Patent MACHINES FOR FASTENING STRIPS TO OTHER WORK Edward Quinn, Saugus, Mass., and Wilbur W. Witt, Brewerton, N.Y., assignors to United Shoe Machinery Corporation, Flemington, N.J., a corporation of New Jersey Filed June 19, 1957, Ser. No. 666,622

Claims. (Cl. 11247) This invention relates to improvements in slip-lasted shoe fastening and assembling machines similar to that disclosed in an application for United States Letters Patent Serial No. 621,796, filed November 13, 1956, in the name of Edward Quinn, one of the present inventors.

The machine of the prior application above identified is intended to operate upon slip-lasted shoe parts, including uppers, sock linings, and platform covers or wrapper strips, the latter of which are advanced toward the point of fastening operations in such a way that they are compressed lengthwise at the fastening point to facilitate the proper formation of the parts and the execution of further steps in shoe construction to be performed after the fastening operations have been completed.

It has been found that the wrapper strip advancing member of the above identified patent application requires relatively complex supporting structure and actuating mechanism. Such structure and mechanism require expert attention in the way of adjustment and maintenance, so that an obstacle is presented whenever an inexperienced operator attempts to utilize the machine.

One object of the present invention is to simplify the construction and improve the mode of operation of a slip-lasted shoe sewing or other fastening machine of the type referred to, by the provision of a wrapper strip advancing and lengthwise compressing member, the actuating mechanism for which is relatively simple and of light-weight design operated by directly acting and readily adjustable mechanism capable of being maintained in operating condition through a wide range of working conditions without the exercise of unusual or expert competence. Accordingly, a feature of the invention fulfilling this object resides in the provision of a fastening machine having a conventional work feed dog, a workfeeding presser foot acting toward and from the feed dog to clamp the work against the feed dog about an area surrounding the point of fastening operations and a wrapper strip advancing member separate from the feed dog acting on the strip only to move it toward the point of fastening operations, in which machine the mechanism for actuating the strip advancing member includes a set of connections having a simple direct rela tionship with the movements of the feed dog. As illustrated, the feed dog connections comprise a link pivoted to the feed dog, a slotted arm connected to the link, and a stud carried by the machine frame entering the slot in the arm to cause an advancing movement to be imparted to the strip by the advancing member simultaneously with the feeding action of the work as a whole by the presser foot and feed dog. Preferably, the movement of the strip advancing member does not exactly coincide, in point of time, with that of the feed dog, so that the work feeding portion of the feed dog movements is partially completed before the strip-advancing member starts to act. With such mechanism it is convenient to impart an overfeeding and compressing movement to the adivancing member directly through the connections with A 2,946,300 Patented July 26, 1960 2 the feed dog, increasing the overfeeding movement within the remaining portion of feed dog operation to exceed the total feed of the work.

These and other features of the invention, as hereinafter described and claimed, will more readily be understood from the following detailed description taken. in connection with the accompanying drawings, in which:

Fig. 1 is a view in left side elevation and partially in section of portions of a slip-lasted shoe sewing machine embodying the features of the present invention;

Fig. 2 is a view in front elevation on an enlarged scale of the parts surrounding the sewing point in the machine illustrated in Fig. 1, certain cover parts having been broken away to show the underlying construction;

Fig. 3 is acdiagrammatic view partly broken away and in section on a further enlarged scale and in left side elevation-of a strip advancing member and its actuating mechanism in the machine; 3

Fig. 4 is a detail perspective view with the parts of the strip advancing mechanism in separated relation showing Fig. 5 is a sectional detail .view in left side elevation of some of the work clamping and other devices in the machine, illustrating the position of a wrapper strip and the other part of a slip-lasted shoe while the strip advancing member is disengaged from the wrapper strip at the beginning of a seam;

Fig. 6 is a similar view of the same parts, illustrating another position of the advancing member at the end of the first strip feeding movement before the first stitch of a seam has been inserted; and V Fig. 7 is a similar view of the same parts, illustrating the position of the advancing member after being disengaged from the wrapper strip after the first complete stitch has been inserted and-the work has been fed.

The machine in the drawings is a straight eye-pointed needle lock stitch sewing machine, similar to that disclosed in United States Letters Patent No. 2,742,005, granted April 17, 1956, upon application of one of the present inventors. The machine has a main sewing head frame 2 Within which is mounted a main sewing shaft 3, and a vertical reciprocating needle bar 4 at the lower end of which is clamped an eye-pointed needle 6. Cooperating with the needle to form lock stitches is a shuttle -8 (see Fig. 2) mounted in a supporting bracket 10 carried by a fiat bed portion 12 (Fig. 1) of a main machine frame. Mounted on the flat bed portion 12, in side-byside relation to the shuttle supporting bracket 10, is a bracket 14 forming with the bracket 10a work-support or post of well-known construction. The work-support post has a work-engaging area of limited length and breadth to permit sewing of high arch shoes comprising a platform sole 16, shown in Fig. 2, attached to a sock lining 18, an upper 20 and a platform wrapper strip 22 (see Figs. 5 to 7, inclusive).

As in the machine of the Quinn prior application above identified and that of the patent just noted, the Work is engaged by two alternately acting work clamps; one of which is driven from the sewing shaft 3 to feed the work and the other of which grips it while the feeding clamp is being back fed. In the machine of the prior application the feeding work clamp comprises a feed dog moving along the line of feed and a presser foot acting to clamp the work against the feed dog during feeding movements and to release the work during back feeding movements. For gripping the work during the back feeding movements of the feeding clamp a stationary work supporting table is provided and a nonfeeding presser foot clamps the work against the .nonfeeding table. In'the machine of the prior patent the work feeding clamp includes a two-part feed'dog actuated with an orbital or four-motion movement, not only in the line of feed but also toward and from the work to enable the work tohecome engaged with the work-supporting table during back feeding movement of the. feeding clampthe feeding and non'f eeding workQclamps. corresponds with thatdisclosed in the patch and advantage is taken of "the orbital or rennet-immanent of the feed dog to actuate the wrapper strip advancihg member. In this way adireotly acting set ofconnections is provided between the-feed .do g landthe wrapper stripadvancing memher, the machine of thepr'ior application being provided with a wrapper strip advancing 'rnemb er which is actuated by a rather complicated s'et'of indirect connections with mechanism forirnparting the work-feeding movement to the feeding clamp. Besides providing simple, directly acting connections for the wrapper strip advancing memberinthe machine ofjthe present invention, the connections are more "rigid, more durable, and more easily maintained in properly adjusted condition, especially where with the type of work being operated upon it is desirable to sew atrelative ly speeds. I

Q'Ihe illustrated arrangement for work clamping and feeding includes anonfee ding work clamp, in which the leading edge of a hollow work-engaging. abutment memberl i at the upper end of the supporting bracket 14 has pressed toward it a vertical portion .of a nonfeeding presser foot :26. The feeding clamp includes a feed dog entering atv its perforated upper eiid within the abutmerit 24 and moving in an orbital path along the line of feed and towardan'd from the under surface'of the work to lift it from engagement with theabntment 24 during work feed. and to return .it into engagement with the abutment duriiig'back feeding movement of the feedingclanip. (Jo-operating with thefeeddog28is a presser foot 39 which also is. given a similar four-motion movement to cIanip the. work and to move it along the line of feed, releasing it during back-feeding movement of the clamp. To assist in feeding-the work the presser foot 30 and the needle bar 4are guided for vertical movement in (a feed cairiage lilmovable in the frame 2 in the direction of work feed, the needleengaging the work during feed and being disengaged during back feed of the carriage. 7

I in accordance with thepresent invention the directly acting connections between the sewing shaft driven feed dog 28 and the wrapper strip advancing member include a slotted horiiontal link 32, best shown in Fig. 3, The rearward end of the link 32 is pivotally connected to the feed dog 28 and is supported by a .fixed stud 34 passing through the slot which is formed in the central portion of the link. The forward end of the link is pivotally connected by a screw 36 to the lower part ofa two-part arrn 3840, the parts being secured together in right angular relation by a screw 42. At the upper end of the arm part 40 of the advancing member is a wrapper strip advancing claw 44- secured by a clamp bolt 46' passing through a space between the forked portions of a shank for the claw and through a slot 48 formed at the upper end of. the arm part 40, the upper end of the arm part 40 being oifset tothe left as shown in Fig. 2, so that the claw may engage a wrapper strip while the remainder of the arm part 38 avoids interference with the movement of'the'strip toward the sewing point.

To connect the link 32 with the feed. dog 28, the feed dog has passing through it a screw 50 (see Fig. 4) and at diametrically opposite sides of the screw 50 is a pair of radial wings on a circular blockSZ haVi'n-ga. central thre'adedopening into which the screw 50 passes. The rearward'end of the flink '32 has an enlargement with a perforation fitting the outersurface of the block 52, a flange on the blockpreventing escape of the arm therefrom. 'To assist in 'se curing' -the circular :blofck 52 to the feed dog the block passes through an opening having s V 4 diametric recesses into which fit corresponding wings on the block.

To insure that the proper motion is imparted to the strip advancing claw 44, the lower end of the arm part 38 has a downwardly curved cam slot 53 fitting a fixed pin 54 projecting from afr'ight-angle plate 56 secured to the frame of the work supporting post. The shape of the slot 53 in the arm 38 is such that during the fourmotion movement of the feed dog 28 the center of the opening at its upper end mc-ves in a four-motion orbit 58 indicated in Fig. 3, and the point of the advancing claw 44- rnoves in a four-motion orbit 60. As in the machine of the above-identified application, the wrapper strip 22 is led along the inclined surface of a ramp 62 disposed at an obtuse'angle to the work-engaging surface of the work support in advance of the point of sewing operations and the needle 6. The effect of the curvature of the slot 53 is to change the shape of the orbit 58 into a fiat-sided form for the orbit 60 wherein the claw 44 moves substantially. parallel to the surface of the ramp '62 when in its position of closest approach thereto. If the bolt 46 is loosened and the claw is so located on the position of its orbit closest to the ramp 62 where it will engage a Wrapper strip with a desired degree. of penetration, then a uniform and reliable strip advancing movement will occur. v I

The four-motion movement of the feed dog'ZS causes it to describe the orbit'SS as a result of the construction and arrangement of the feed dog and its driving connections with the sewing shaft. The feed dog is mounted on a lever 63 having a central slot in'which is engaged a block 64 pivotally mounted on a fixed screw stud 66 threaded into the bracket 14 (Fig. l). The lowerendof the feed lever 68 has secured to it an actuat in'g yoke 70, the yoke portion of which surrounds an eccentric 72 drivenin unison with the main sewing shaft 3. A horizontal arm of the feed lever 68 is connected to a vertical arjmof a lever 74 including a rock shaft 76, the other armof the lever being actuated by mechanism timed to impart the proper feeding movements to the work and also to be driven from the sewing shaft 3.

v Referring more particularly to Fig. 3, the feed dog engages and feedsfthe work during its movement from the position-1 of the orbit '58 through the position 2 and to'the position '3, the advancing claw 4 5 acting to bulge and raise the work from the surface of the work support at "the vertex of the angle between the ramp and the work support, in a manner tobe described. During the time of this movement the total feed occurs between the positions 1 and 3. The presser foot 30 clamps the work against the feed dog during this feeding time. Also, during this feeding time the nonfeeding foot 26 is raised from the work.

\ v[Tojpermit greater freedom of movement in the work in presenting it to the machine the connections between the feed dog and the strip advancing claw 44 cause the entire advancing movement to be imparted to the wrapper strip during the latter portion only of the work feeding time of the feed dog and the amount of this advancing movement is greater than the total movementimparted to the, work by the feed dog. Thus, while the feed dog is at the position 1, the point of the advancing claw 44 is also in its position 1 disengaged from the wrapper strip. 'The advancing claw does not engage thewrapper strip ordinarily much before reachingthe position 2 of its orbit'60, which position corresponds with the position 2 of the feed dog. At the position 2 the feed dog has reached a halfway point in its feeding movement. In

order to provide a greater advancing movement of the wrapper strip toward the sewing point during the remaining portion of the feeding movement of the work the pivotal point of conncction between the arm 38-40 and .thelink 32 is soselected, the stud 34 solocated, and the slots? is so cut that the positions 2 and 3 ofclaw orbit 60 are at least twice the remaining movement of the feed dog between positions 2 and 3 of the orbit 58. The movement of the advancing claw 44 between the positions 2 and 3 of ,orbit 60 also is substantiallygreater than the total amount of feeding movement of the feed dog between the positions 1 and 3 of the orbit 58. In this way anexcess of wrapper strip is advanced toward the sewing point of the machine to cause the strip together with the sock lining and upper to be bulged by the advancing member at the vertex of an angle formed between the ramp 62 and the upper work-engaging surface of the work support. As illustrated in Fig. 6, as soon as the non: feeding presser foot 26 engages the upper surface of the work the bulge in the strip is flattened on the work support (Fig. 7) between the advancing claw and the feed dog.

I To assist in guiding the wrapper strip and to hold the bulged strip in line with the sewing point the machine is equipped with a wrapper strip edge guiding pilot con-, nected to the work support post at the vertex of the angle formed. by the ramp and the work-enegaging surface of the work support. The pilot comprises rolls 78 and 80 of the same construction and mode of operation as disclosed in United States Letters Patent No. 2,722,182, granted November 1, 1955, upon a joint application of Edward Quinn, one of the present inventors and Napoleon S. Ferland. The pilot rolls .78 and 80 are of special advantage in guiding relatively thick cover strips as they approach the work support and advance beyond the ramp but the rolls may be eliminated when thin, flexible strips are being sewn.

' The nature and scope of the invention having been indicated and a particular embodiment having been de- ;scribed, what is claimed is:

1. A machine for manufacturing slip-lasted shoes hav- "ing a main shaft, devices actuated by the main shaft for :a first presser foot acting toward and from the work ffeed dog to clamp the work parts about the point of fastening operations, a strip-advancing member separate from the feed 'dog for moving the strip toward the point of fastening operations, a work support and a second presser foot acting toward and from the work support to clamp the work between the first presser foot and the strip-advancing member, in combination with means comprising mechanism driven from the main shaft for actuating the strip-advancing member, including a link connected to the feed dog, an arm connected to the link, to one end of which arm the strip-advancing member is secured and at another end of which is a cam slot and a fixed pin on the machine frame engaging the cam slot .to cause a strip advancing movement to be imparted to the advancing member while the first presser foot is clamping the work against the feed dog and while the second presser foot is raised from the work.

2. A machine for manufacturing slip-lasted shoes hava main sewing shaft, stitch-forming devices for feeding and sewing one edge of a wrapper strip to other shoe parts, said devices including a straight eye-pointed needle actuated by the main sewing shaft, a work feed dog, a first presser foot acting toward and from the work feed dog-to clamp the work parts about the point of sewing operations, a strip-advancing member separate from the feed dog formoving the strip toward the point of sewing operations, a work support and a second presser foot acting toward and from thework support to clamp the work between the first presser foot and the strip-advancingmember, -in combination with means comprising mechanism driven from the main shaft for actuating the strip-advancing member, including a link connected to the feed dog, an arm connected to the link, to one end of which arm the strip-advancing member is secured and at another end of which is a cam slot, and a fixed pin on the machine frame engaging the cam slot to cause a strip advancing movement tobe imparted to the ad-'v vancing member while the first presser foot is clamping the work against the feed dog andwhile the second presser foot is raised from the work. 3. A machine for manufacturing slip-lasted shoeesaid machine having a main shaft, stitch forming 'and workfeeding devices actuated by the main shaft for attaching one end of a wrapper strip to other work parts,': s'aid devices including a work'feed' dog acting through anorbit to engage, feed anddis engage the work andto back feed while disengaged from the work," and a strip-advancing member" separate from the feed dog acting-on the' strip only in advance of'thefeed-dog, in combination with means comprising niechanisin for. actuating the strip? advancing member, including'a link pivotally connected atone end to the feed 'dog, a sliding support: for the'mid portion of the link, an arm connected to said link, to one end of which arm the strip-advancingmember'is secured.

, and at another end of which arm is a cam slot, and means including a pin carried by the machine frame and arranged to guide the advancing member through engagement witlrthe slot in the arm, successively to engage, feed and disengage the strip. V p I 4-. A machine forimanufacturing slip-lasted shoes, said machine having a mainshaft;stitch forrning and work-f feeding devices actuated by the main shaft for attaching:

one end-of a wrapper strip toother work parts, said devices including a work feed dog acting through an orbit to engage, feed and disengage the work and to back feed while disengaged from the work, and a'strip-advancing member separate from the feed do'gacting on the strip' only in advance of the feed dog, in combination with rmeans comprising mechanism for actuating the strip-ad.-

vancing member, including a link pivotally connected at one end to the feed do'gQaJ-slidifig support-for the haidportion of the link, an arm: connected to s'aid link, to one end 'of which arm the strip-advancing member is secured and-atanother end of'which is a cam slot, and apin carriedby the machine frame and arranged to guide the advancing member through engagement with the slot in the arm, successively to engage, feed and disengage the strip, said' cani slot being cut in the arm with a downwardly curved shape todisengage the'strip-advancing member from the strip at the 'end of the'work-feeding portion of the feed dog path and to'retain the advancing member out of engagement with the strip until theworkfeeding portion of-the feed dog pathis partially completed. 5. A machine for manufacturingslip-lasted shoes, said machine having amain shaft, stitch-forming and workfeeding devices actuated by the main shaft for attaching one end of a Wrapper strip to other work parts, said devices including a work feed dog acting through an orbit to engage, feed and disengage the work and to back feed while disengaged from the work, and a stripadvancing member separate from the feed dog acting on the strip only in advance of the feed dog, in combination. with means comprising mechanism for actuating the strip-advancing member, including a link 'pivotally connected at one end to the feed dog, a sliding support for the midportion of the link, an arm connected to the link,

to one end of which arm the strip-advancing'mernber is secured and at another end of which arm is .a cam slot,j and a pin carried by "the machine frame and arranged to' guide the advancing member through engagement with the slot in the arm, successively to engage, feed and disengagethe strip, thepoint of pivotal connection between the advancing memberand the link being selected to cause the advancing member to impart its entire feedingmove ment to the strip during the time in which the feed dog engages the strip, the entire feeding movement imparted to the strip by the advancing member being greater than :lhe total movement imparted to the work by the feed 6. A machine for manufacturing slip-lasted shoes, said machine having a main shaft, stitch-forming and work- I 7 feeding devices actuated by the main shaft for attach: on e endfo'f "a wrapper strip to other worl; parts, said. devices includingawork feed dog acting through 5361a: a engage; feed and gag elthe 'vv o rl and to b feed while s e fiw he w h A te separate-r mthefeed dog acting on trip only in dv e of thefeegl dog, in combination hr meansfco mpr ng mechanism for actuating the l i fise in irb all we a rid the fe ed dog; a sliding snp gsort for t t dportl on of the linh, an armconnected to said .'1ink, 556156 aren etx edr aen m mber secured and "t other. endfof whih is a cam slot, and a'pmemia emachinefram and arranged to guide f i e-mi her" hrish. ease em??? th he 81am; the. rm; successively to engage, 'f

downwardlyfcjilr vefd shape to disengage the strip adv anc' ing member from thegstripv at the end o f the work-feeding i he o p d n eta n. the d n in n fl t fl m t w th he ta n nti e wor feeding pbr tionsoff the. ree dog; pathis partially completed, and the pointer pivotal conriection between the advancing member and thelink' being selected; to; cause the, impart its entire advancing moment to the. stiii pfdu ring the, time in which the. other work'isfed, the, entiremovement imparted to the strip. by. the" advancing inember being girea ter than that; imparted toljthe work'bythefed.dog; i

' 7. A machine,forrnanufacturing slip-tasted shoes, said machine. having" a shaft, stitch:formingand work-t e i vie" er ehe pee ea o ma iiigfone eaa' r wrapper. stnipto other work parts, saidii n s fi rew s ete do; at n hr a bi to engage; feed and disengage ,the work, and to vbacl; feed While 3 f P 3hfWQ k; and a hi advancing member separatevfrom thefeed dog acting on the strip only in arages the feed: dog, in combination with mechanism. for} aetuati g-thh stripadvancing member; inl iiii f i'n mallr e n g e at ne nd to he feed doga'slidingj'support"forfthemidportion ofthe link, an arm connected to said linhto one end of which arm. the strip-advancing member is secured and at another end of which isa can s lot a pin carried by the machine frame and. arranged to guide. thev advancing member through engagement wanna slot in thearm, successively to engageffed anddisengage the strip, said cam slot being cut" .in the arm with, a downwardly curved shape to disengage the stripra'dvancing member from the strip at the ehd of the work-feeding portion of the feeddog path and to retainlthe. advancing member out of engagementi with, the stripcuntil thework feeding portion of the feed dog, path. is partially completed; and a second presser foot for flattenhigfthe strip on the work support between the advan' h gmh srae he e oe 8 A machine-for. manufacturing slipilasted shoeshaving a devices actuated-by the main shaft for feedinga q fastening one edge of a wrapper strip to. other workpar ts said deyices includinga, work support, a e/pa; feefddog acting from beneath the work support, a pr esserl foot acting toward and: from the feed dog to clamp the worh parts about, the point of faste'ningoperatio ns, a strip guidingramptdisposed' at an. obtuse angle a to the work -engaging surface of the Work support. and a Ship-advancing member for moving the strip along the 8 ating the strip-advancing-member, including a con: n e c ted to the 'feed dog, an arm connectedtplthe linlgto one end of whicharni the strip-advancing member is see, cured e de ane hs and o w kh is, emtsllmt pin. carried; bythe machine frame entering the .s lot f9; imparting a strip-advancing movement, to the, advancing meinbert'o, cause the strip to be bulged, by the advancing member at the vertex of the angle'fQI ned between the. ramp, and the work support, j

9. A machine for manufacturing slip-lasted shoes hav-t ing a main shaft, devices actuated by the main shaft for feeding and fastening one edge of awrapper stfiip to,

other work parts, said devices including'a work'support a work feed dog acting: from vbeneath the work supporha presser foot acting toward and from the feed dog toclarnp,

the Work parts about the point of fastening operations,

than that imparted to the work by, the feed clog, in

1 ing atrnain shaft, devices actuated by the main shaft fo'r bination with means comprising mechanismfor actuating the strip-advancing member, including a linlg connected to; the feed dog, an arm connected-to, the, link, to. one end of which arm the strip-advancing member is seemed and at another end of which is a cam slot, a pintcar-r ied by the machine frame entering the slotfor imparting a strip-advancing movement to the advancing, member tov cause the. strip tobe bulged by theadvancing member at: the vertex of the angle formed between thetramp and the Work support, and a strip edge guiding 'pilot mounted at theverte'x of the angle between therampand the WQIk: support to cause the bulged stripto he. held, in line the point oflfastem'ng operations alongthe work-engaging surface of the work support beyond the ramp. 10. A machine for'manufactpririg slip-lasted shoes hajk feeding and fastening one edge of a wrapper: strip to other work-engaging parts, said devices including a work v feed dog, a. first presser foot acting toward andfrom the work feed dog to clamp the Work parts about the point ramp toward the point of fastening operations at a greater rate than that imparted to the workvby the. feed dog, in

ohmbihationlwith means comprising mechanism for actuof fastening operations, a strip-advancing member separate from the feed dogfor moving the strip toward. the point of fastening operations, a work'supp ort and. a second presser foot acting toward andfrom the work sup port to clamp thework between the first presser foot and the stripe advancing member, in combination with means comprising mechanism driven from the mainv shaft for actuating the strip-advancing member, including a slotted link connected. tothe feed dog, an arm connected, to the link, to one end of which arm the stripradvancing memher is secured and at another end of which, is a cam slot, afixed pin on the machine frame engaging, the cam slot, and a fixed stud engaging the link within its slot. to cause a strip-advancing movement to be imparted to. theadvancing member. while the first, Presser foot is clamping the Work against the feed dog and while; the second presser foot is raised from the work.

References Cited in the file of this patent 2 UNITED STATES-PATENTS 204,704 Beukler 11111611, 1878 1,071,108 Stedman Aug. 26, 1913 1,546,202 Chenoweth July 14, 1925 2,106,106 Mueller Jan. 18, 1938 2,192,166 Ashworth Mar. 5, 1940 2,331,366 AShWOIth Oct. 12, 1943 2,722,182 NOV. 1, 1955

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