US1659443A - Two-needle overedge sewing machine - Google Patents

Description

Feb. 14, 1928.

R. W. REDIN TWO-NEEDLE OVEREDGE SEWING MACHINE Filed May 25. 1924 5 Sheets-Sheet 1 Feb. 14, 192s. 1,659,443

R. W. REDIN TWO-NEEDLE OVEREDGE SEWING MACHINE Filed may 23, 1924 5 sheets-sneet'? Feb. 14, 1928.

R. W. REDIN .TWO-NEEDLE OVEREDGE SEWING MACHINE Filed May 25, 1924 5 Sheets-Sheet 3 R. W. REDIN TWO-NEEDLE OVEREDGE SEWING MACHINE Feb.'14, 1928.

5 Sheets-Sheet 4 Filed May 23, 1924 R. W. REDIN TWO-NEEDLE OVEREDGE SEWING MACHINE Feb. 14; 192s.

Filed may 25, 1924 5 Sheets-Sheet 5 Patented Feb. 14, 1928.

UNITED STATES PATENT orifice. N

nor'w.` REDIN, or CHICAGO, iLLINoIs, AssrGNoR 'ro UNION SPECIAL MACHINE CoM- PANY,` OF CHICAGO, ILLINOIS,

A CORPORATION- OF ILLINOIS.

y TWO-NEEDLE ovnmsncm SEWING MACHINE.

Application led May 23,

The invention relates to new and useful improvements in sewing machines,` and more particularly to a two needle overedge sewing machine. i i

An object of the invention is to provide a machine of the above type, wherein the looper which co-operateswith thetwoneedles is` oscillated by an arrangement of links and levers movable into alinement for giving an extended dwell to the looper at the forward end oi its stroke, and wherein said links and levers are relatively short so that the machine may be driven at very high speed without excessive vibration in any of the looper operating elements.

In the drawings which show by way of illustration one embodiment of the inven- Figure l is ai front` view of a machine embodying my improvements, the work support being omitted for the sake of clearness;

Fig. 2 is a view partly in section and partly in plan of the mechanism beneath the work support; I. i

\ Fig. 3 is a front viewl of ai portion of the louper o} ierating mechanism showing the louper at the rea-rend of its stroke;

Fig. 4 is a sectional view on the line 4 4 of Fig; E2; i

F is a sectional viewon the line 5-5 of Fig. 2; p.

Fig. 6 is a perspective view of the looper, the carrier for supporting the looper, and the means for oscillating the looper, the parts being detached; f

Fig. 7` a perspective View of the reciproc-ating rod for oscillating the looper and the lever for reciprocating said rod, the parts being detached. y

The invention is directed broadly to a two needle over-edge sewing machine, and a machine of this type which particularly adapt-ed for stitching reeds and reed covers to a hat band. One of the needles passes through the reed vcover adjacent the reed, while hthe other needle passesover the edge of the reed cover. Devices are provided for forming a loop in the thread of the needle which passes through the reed cover and for placing the same so that the other needle which goes over the edge of the reed cover will enter said loop. The two needle thread loops are locked by means of a thread carrying looper which moves first into the thread loop of the needle passing through the reed Y 1924. serial No. 715,416.

v19th, 191e, No. 1,257,239,

The present invention is particularly directed to a novel mechanism for operating the looper and giving thereto an extended dwell at the forward end of its stroke. This is accomplished by means of a. rod which is reciprocated and given a dwell at the forwardzend of its stroke. Said rod carries a pivoted block which slides in a: yoke attached to the looper supporting shaft, so f 'that the reciprocations of the rod are converted into oscillations in the looper. The rod is reciprocated b means of a lever located directly beneati the rod, and having a connection to the rod which permits said rod to be raised and lowered during the needle avoiding movement of the looper. The lever is connected by a link to a rock lever `pivoted to a bracket on the work support, which is likewise located directly beneath the reciprocating rod. This rock lever is oscillated by a link connection to the needle lever of the machine. The link connecting `the rock lever to the lever which reciprocates the reciprocatinv rod isl so arranged that its pivotal connection with the rock lever moves into and across aline passing through the fulcrum point ofthe rock lever and the pivotal connection olf-the link to the lever which imparts the movements to the reciprocating rod. Thus it is thatan extended dwell is given to the reciprocating rod and in turn to the looper when it reaches the forward end of its stroke.

Referring morein detail to the drawings, my improved machine includes a bled plate l, on whichis mounted a standard 2, carrying an overhanging arm 3.` A needle bar 4 reciprocates in said overhanging arm and reciprocations are imparted thereto by means of a needle lever 5 connected to the needle bar by a. link 6. The needle lever 5 is in turn oscillated by an eccentric strap 7 which co-operates with an eccentric 8 on the main shaft 9, and with a ball stud attached to the needle lever extension. The material is held 13, mounted on a feed bar 14, pivoted to a feed rocker l15, andraised and lowered by an eccentric on the main shaft 9. The feed rocker 15 is oscillated by means of an arm 16, which is connected to a link 17, co-operating with a crank 18 adjustably mounted on a disk 19, which in turn is attached to the Xtreme forwardend of the shaft 9. rllhis feeding mechanism is of the ordinary construction and further description is not thought necessary.

The needle bar 4 carries two needles 2O and 21. The left hand needle 21 is adapted .to pass through the reed cover Aand the hat band, to which the reed cover is to be attached. The needle 2O passes over the edge of the reed and reed cover. A linger 22 carried by a lever 23 moves across the path of the needle 21, when the needle is raised, and engages the thread of said needle, and carries said needle thread forward. A thread hook 24 moves back and forth substantially at right angles to the line of feed and is adapted to engage this needle thread Vcarried by the finger 22 and form a loop therein and also to positionsaid loop for the right-hand needle 20 to enter. The operation of these parts are similar to that described in the Hughes patent.

The lever 23, carrying the linger 22, is mounted on a bracket 25, which in turn is mounted on the presser bar 12 which carries the presser foot 11. The thread hook 24 is carried by an oscillating lever 26, which is likewise mounted on the bracket 25. The lever 23 is oscillated by means of a link connection to a stud in the needle bar, which. in general, is the manner of operating the finger in the Hughes patent. The lever 26 is oscillatcd by means of a link 27, which is connected to alever` arm 28, pivoted at 29 to a bracket 30 mounted on the bed plate 1 of the machine. rChis lever is moved back and forth by an eccentric strap 82, which cooperates with an eccentric 33 on the main shaft 9. The thread linger and the thread hook operating mechanisms, together with the supporting bracket for these operating mechanisms form no part of my invention. Cri-operating with -the needles beneath the work support is a thread looper 34. Said looper 34 is mounted on the end of a shaft 35, which in turn is mounted to oscillate in a ycarrier 36 (see Fig. 6). VThis looper carrier 86 is mounted on ay carrier supporting shaft 87'and is secured rigidly thereto by means of a set screw 38. The looper carrier has a cylindrical recess 219 therein, in which a reciprocating` bar 40 is located. Said bar 40 also reciproeates in a bracket 41, which is likewise mount-ed on the loop-er support the outer end of tlj .strul 43 is a bloclr the looper supporting shaft 'Said brack- Y et is secured to the looper carrier by means of screws 50. The yoke 46 lies between the bracket 48 and the outer vertical face of thel looper carrier, and is free to swing b etween these parts and thus impart oscillationsto the looper. Y

The reciprocating rod 40 is moved back and forth by a lever 51 which is journaled on a pivot stud 52 mounted in a bracket 525, attached to the bed plate of the machine. This bracket and the lever 51 are directly beneath the reciprocating rod 40. Mounted on said reciprocating rod'are two sleeves 54 and 55. These sleevesarey provided, respectively, with projecting winged plates 56and 57. The sleeves are split and are each clamped to the rod 40 by means of ascrew. Lying between these projecting plates 56 and 57 is ablock 58 loosely mounted on a projecting stud 59.- The stud 59 is rigidly secured in a bearing sleevefGO on the outer end of the arm 51. As the arm 51 oscillates it will carry-the block 58 back and forth and the block lying between the plates 56 and 57 will move the rod 40 endwise. Said vplates 56 and 57 are, of course, properly adjusted Vso as to receive the block and impartthe movements of the lever to the reciprocating rod. The rod 51 is in turn oscillated by a l rockl lever 61, which is pivotally mounted on a fulcrum stud 62 carried-by an arm 68, projecting outwardly from the bracket 53. A link 64 is pivoted at 65 to the lever 51, and is pivoted at 66 to the rock lever 61. This rock lever is provided with an arm 67, which carries a. ball stud, to which a link 68 is connected. 68 is connected to a ball stud 69, at the lower end of the needle lever extension 70. As the needle lever oscillates it will impart an endwise movement to the link 68, which in turn will rock the rock shaft 61, and this,

through the link 64, will rock the lever o1 and the lever 51, as has been no'tethwill reciprocate the rod 40. inasmuch as the reciprocations of the rod are brought about by the aid of the projecting plates located on opposite sides of the block 58, which freely engage The other end of this link the lever that reciprocates the rod, the rod can be raised and lowered with the oscillations of the looper carrier. In other words, the actuating rod which oscillates the looper is positively moved endwise by a lever which extends 1n a direction substantially at right angles to the rod, and at the same time, the rod can moved bodily during the oscillations of the looper and maintain its connection with the lever.

It will be noted that the pivot pin 6G, when the looper is at the rear end of its stroke,

as shown in Fig. 3, is well below a `line join` v that the looper, when at the forward end of lill its stroke, will he given an extended dwell.

Furthermore, it is noted that all these operating parts for reciprocating the rod ll() are extremely short, so that the looper may be moved at a high rate of speed and with little or no vibration vin the parts thereftn'.

The looper supporting shaft 37 is mounted so as to oscillate in the brackets 71 and 72. A yoke 73 secured to said shaft 37, by means of a set screw 74, co-operates with an eccentric 75 on the main shaft 9, and thus it is that the looper' supporting shaft 37 is given a slight oscillation. The loopercarrier 3,6 is rigidly secured to this shaft 37 and therefore, the looper carrier will be oscillated and this imparts a needle avoiding movement. to the looper. y

From the above description, it will be apparent that I have provided a looper operating mechanism, wherein the looper oscillates into and out of the needle thread loops and is given an extended dwell at the forward end of its stroke while the needles are moving from a point above the work to the upper end of its stroke and back again into the material. threads will properly concatenate with the looper thread. Owing to the fact that the looper is positivelv moved into and out of the needle thread loops and is moved by means of linksand'levers which are comparatively short, I am able to give to the looper its movements `by devicesy which will not have any excessive vibrations when the machine is operated at high speed.`

A needle guard '7G is provided which insures the needles being properly positioned for the looper to pass the same.` This needle guard is mounted on the looper supporting shaft 37.

While Ihave described my invention as embodied in a machine especially adapted for hat sweat work, it` will be understood, of course, that my improved looper mechanism This insures that the needle maybe used for other purposes. While I have also described the `looper operating mechanism as used in connection with two needles set abreast, it will be understood that, from certain aspects of the invention, this looper operating mechanisl'n'could he used with one needle. Therefore, I do not limitmy invention to the details of construction and the arrangement of parts shown and described,but the scope of the invention is set forth in the appended claims.

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

1. A sewing machine including a pair of needles, a thread carrying looper co-opera` ting with said needles, means for oscillating said thread. carrying looper into and out of the needle thread loops including a rod reciprocating back and forth in a line parallel with the plane of oscillations of the looper, a lever connected at its upper end to said rod for reciprocating the same, a rock lever mounted at one side of said lever and havingya projecting arm, a link connectingl said projecting arm to the lever which rcu ciprocates said rod, means for oscillating the rock lever, the arm of the rock lever and the link connected thereto being so dislvjiosed as to move into substantial alinement` when the looper is at the forward end of its stroke for giving an extended dwell thereto;

2. A sewing machine including a pair of needles, a thread carrying looper co-opera ting with said needles, means for oscillating; said thread carrying looper intoand out of the Vneedle thread loops including a rod reciprocating back and forth in a line parallel with the plane of oscillations of the looper. a lever connected at its upper end to said rod for reciprocating the same, a rock lever mounted at one side of said lever and having a projectingarm, a link connecting said projecting arm to the lever which reciprocates said rod, means for oscillating the rock lever. the arm of the rock lever` and the link connected thereto beinvso disposed as to move into substantial alinement when the looper'is Dfi at the forward end of its stroke for giving an extended dwell thereto, and means for moving the looper and the reciprocating rod which oscillates the looper laterally for giving to the looper a needle avoiding movement, the connection between the lever and the rod permitting said rod Vto move laterally relative to the lever.

3. A .sewing machine including a pair of needles, a thread carrying looper cooper ating with said needles, a shaft on which said looper is mounted, a carrier inwhich said shaft is mounted, a rod reciprocating back and forth in said carrier, means for connecting the rod to 4the "looper shaft whereby the reciprocations of .the `rod -will impart oscillations to the looper, a supporting shaft on which said carrier is mounted, ineans for oscillating said carrier for giving a needle avoiding inovenient to the looper, a lever located beneath. said reciprocating rod and Connected at'its upper end to said rod, a rock lever, means for oscillating' the rock ever, said rock lever having a 'projecting portion, a link connecting said projecting portion to the lever attached to the reciprocating rod, said aiin and linkbeing so arranged as to inove into alineinent when the looper is at the forward end of its stroke givin a dwell thereto.

A sewing niachine including a pair of needles, a thread carrying looper co-operating thci'ewitl'i, a shaft on which said looper is inounted, a carrier in which said shaft is inountcd, a supportingshaft for said carrier, ineans for oscillating said Shaft, a rod nioiinted in said carrier and reciprocating back and forth therein, a forked arin niounted on the shaft carrying the looper, a block pivoted to the reciprocating rod and enf-raged by said forked arin, so that the reciprocations of the rod will oscillate the looper, nieans for moving said rod back and forth and giving a dwell thereto when the looper is at the forward end of its stroke, said looper carrier having a projecting ledge, a bracket plate secured thereto and supporting the outer end of the shaft on which the looper is mounted, said forked arifn lying between said bracket plate and the body portion of the looper carrier.

5. A sewing inachine including a pair of needles, a rthread carrying looper co-operating therewith, a shaft on which said-looper inounted, a carrier in which said shaft is mounted, supporting shaft for said carrier, ineens for oscillating said shaft, a rod mounted in said carrier and reciprocating back and forth therein, a forked aiin mounted on the shaft carrying the looper, block pivoted tothe reciprocating rod and engaged hy said forked arni, so that the reciprocations of the rod will oscillate the looper, ineans for nioving said rod back Vand forth and giving a dwell thereto when the looper is at the forward endofits stroke, said looper carrier having a projecting ledge, a bracket plate secured thereto and supporting the outerend of the shaft on which the looper is mounted, said forked aifni lying between said bracket plate and the body portion of the looper carrier, said iiieans for reciprocating the rod including a lever mounted beneath the rod and calrying a pivoted block at its upper end, spaced winged plates` carried by the reciprocating rod and engaging the opposite sides of said Y block -wherebv said reci rocatiiiorod can inove up anddown with the looper carrier, and nieans for reciprocating the lever carrying said block and giving a dwell to the rod when the looper is at the forward end of its stroke.

0. n sewing inachine including a pair of needles, a thread carrying looper co-operating therewith, a shaft on wnich said looper is inounted, a carrier in which said shaft is mounted, a supporting shaft for ysaid carrier, ineans for yoscillating said shaft, a rod inounted in said carrier and reciprocating back and forth therein, a. forked ari'n mounted on the shaft carrying the looper, a block pivoted to the reciprocating rod and engaged by said forked ai'ni, so that the reciprocations of the rod will oscillate the looper, ineans for inoving said rod-back and forth and giving a dwell thereto when the looper is at the forward end of its stroke, said looper carrier having a. projecting ledge, a bracket plate secured thereto and supporting the outer end of the shaft on which the looper is niounted, said forked arin lying between said bracket plate andV the body portion of the looper carrier, said ineans for reciprocating the rod including a lever inounted beneath the rod and carrying a pivoted block at. ,its upper end, spaced winged plates carried by the reciprocating rod and engaging the opposite sides of said block, whereby said reciprocating rod can niove up and down with the looper carrier, a rock lever, a link connecting said rock lever' to the said lever carrying the block, said rock lever and link being arranged to niove into substantial alinenient when the looper is at the forward end of its stroke for givinga dwell thereto.

7. A sewing inachine including a pair of neeedles, a thread carrying looper co-operating therewith, a shaft on which said looper is inounted, a carrier in which said shaft is inountcd, a supporting shaft for said carrier, ineans for oscillating said shaft, a rod mounted in said carrier and reciprocating back and forth therein, a forked arni inouiited on the shaft carrying the looper, a block pivoted to the reciprocating rod and engaged by said forked arm, so that the reciprocations of the rod will oscillate the looper,`

means for moving said rod back and forthv and giving a dwell thereto when the looper is at the forward end of its stroke, said looper carrier having a. projecting ledge, a bracket plate secured thereto and Isupporting the outer eiid of the shaft on which the looper is iiiounted, said forked arm lying between said bracket plate andthe body portion of the looper carrier, said nieans for reciprocating the rod including a supporting bracket-located beneath said rod, a vertically arranged lever mounted on said bracket, and connected to said rod for reciprocating the same, said bracket having a rearwardly projecting arin, a iock lever mounted on said last nanied arm, and having an arm projecting toward the vertically arranged lever, a link for connecting said last named arm with the lever, said link and arm being so arranged as to move in substantial alinementwhen the looper is at the forward end of its stroke for giving a dwell thereto.

8. A sewing machine including a pair of needles, a thread carrying looper co-operating therewitlna shaft on which said looper is mounted, a carrier in Which said shaft is mounted, a supporting shaft for said carrier, means for oscillating said shaft, a rod mounted in said carrier and reciprocating back and forth therein, a forked arm mount-pl cd on the shaftcarrying the looper, a block pivoted to the reciprocating rod and engaged by said forked arm, so that the reciprocations `of the rod will oscillate the looper, means for moving said rod back and forth and giving a dwell thereto when the looper is at the forward end of its stroke, said looper carrier having a projecting ledge, a bracket plate secured thereto and supporting the outer end of the shaft on which the looper is mounted, said forked arm lying between said bracket plate and the body portion of the looper carrier, said means for reciprocating the rod including a supporting bracket located beneath said rod, a vertically arranged lever mounted on said bracket and connected to said rod for reciprocating the same, said bracket having a laterally projecting arm, a rock lever mounted on said last named arm, and having an arm projectin toward the vertically arranged lever, a lin; for connecting said last named arm with the lever, said link and arm being so arranged as to move into substantial alinement when the looper is at the forward end of its stroke for giving a dwell thereto, a needle lever extension, and a link for connecting said needle lever extension to the rock lever for oscillating the same.

S). In a sewing machine, a pair of needles, a thread carrying looper co-operating with said needles, a shaft on which said looper is mounted, a carrier in which said shaft is mounted, a supporting shaft to which said carrier is rigidly attached, means for oscillatinar said shaft, said carrier having a bearing sleeve located at right angles to the shaft carrying the looper, an arm projecting laterally from the supporting shaft for the looper carrier and spaced from said looper carrier, said arm having a sleeve in alinement with the sleeve in the carrier, a rod reciprocating in said sleeves, a vertically arranged lever, a block pivoted to the upper end of said lever, spaced wings mounted on said rod between said bearing sleeves and adapted to engage said pivoted block whereby the oscillations of the lever will move said rod back and forth and will permit said rod to be raised and lowered with the oscillations of the looper carrier, and mea-ns for connecting said reciprocating rod to the looperl shaft,

whereby the reciprocations of the rod are converted into oscillations of the looper.

, l0. In a sewing machine, a pair of needles, a threadcarrying looper co-operating with said needles, a shaft on which said looper is n'iounted, a carrier in which said shaft is mounted, a supporting shaft to which said carrier is rigidly attached, means for oscillating said shaft, said carrier having a bearing sleeve located at right angles to the shaft carrying the looper, an arm projecting laterally from the supporting shaft for the looper Carrier and spaced from said looper carrier, said arm having a sleeve in aline-` mcnt withthe sleevein the carrier, a rod reciprocating in said sleeves, a vertically arranged lever, a block pivoted to the upper end of said lever, spaced wings mounted on said rod between said bearing sleeves and adapted to engage said pivoted block whereby the oscillations of the lever will move said said rod back and forth while said rod is free to be raised and lowered with the oscil lations of the looper carrier, a forked arm mounted on the shaft carrying the looper, a pivoted block'carried by said reciprocating rod and engaging said forked arm so that the reciprocations of the rod will oscillate said looper.

ll. In a sewing machine, a pair of needles, a thread carrying looper co-operating with said needles, a shaft on which said looper is mounted, a carrier in which said shaft is mounted, a supporting shaft to which said carrier is rigidly attached, means for oscillating said shaft, said carrier having a bearing sleeve located at right angles to the shaft carrying the looper, an arm projecting laterally from the supporting shaft for the looper carrier and spaced from said looper carrier, said arm having a sleeve in alinement with the sleeve in the carrier, a rod reciprocating in said sleeves, a vertically arranged lever, a block pivoted to the upper end of said lever, spaced wings mounted on said rod between said bearing sleeves and adapted to engage said pivoted block whereby the oscilh'tt-ions of the lever will move said rod back and forth while said rod is free to be raised and lowered with the oscillations of the looper carrier, a forked arm mounted on the shaft carrying the looper, apivoted block carried by said reciprocating rod and engaging said forked arm so that the reci roeations of 4the rod will oscillate sald looper, said block being so located on the rod as to Inoveifrom a point at one side of the shaft carrying the looper to a point at the other side thereof.

l2. In a sewing machine, a pair of needles, a thread `carrying looper co-operating with said needles, a shaft on which said looper is mounted, a carrier in which said shaft is mounted, a supporting shaft to which said carrier is rigidly attached, means for oscillatino; said shafe, said carrier haw/inge bearing sleeve locabed at right angles to the shaft carrying' the looper, en arm projecting lateully om the supporting shaft 'for the leoper carrier and spaced from seid louper carrier, said armhavng a eeeve kin aline ment Wlth the sleeve-,1n the carrier, n rod leelproezltmg 1n sald sleeves, a vertloally arranged levee, 2L block pvoted to the upper end of said lever, spaced Winge .mouned on LSaid -rod between said bea-ring sleeves and adaped to engage Said pvoed block Whereby rho oscllaons of the lever will move said Tod back :md forth While said rod free to be raised and loweed with the oscillations of the looper Carrier, a forked arm mounted on the shaft cm1-Wing the looper, e

pvoted block Carried by said `reciprocating rod and engagmg sald forked arm so thatV Jche reeproeatons of the Arod will osellateV said looper, said block being' so located, on the rod as to move from fp pomtat one side of the Shaft earrymg the looper to a` pomt *at the other side thereof, and said looper earner lmvmg a. forwardly`projeet1ng ledge amd a bracket plate carried by said ledgge and supporting the outer end of the looper.

ROY WT. REDIN.

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