US1133147A - Sewing-machine. - Google Patents

Description

L. E. JOHNSON & E. ERIOKSON.

SEWING MACHINE.

APPLICATION FILED MAY 19, 1913.

Patented Mar. 23, 1915.

6 SHBETSSHEET 1.

L. E. JOHNSON & E. ERICKSON. v

SEWING MACHINE. APPLICATlUN FILED MAY 19. 1913.

Patented Mar. 23, 1915.

s SHEETS-SHEET 2.

L. E. JOHNSON & E. ERIOKSON. SEWING MACHINE.

v APPLICATION FILED MAY 19, 1913. L1 go Patented Mar. 28, 1915.

6 SHEETSSHEET 3.

L. B. JOHNSONK: E. ERIGKSON. SEWING MACHINE. APPLICATION FILED MAY 19, 1913.

9 1 1 Wu v r PatentedMar. Q3, 1915.

6 SHEETS-SHEET 4.

L. E. JOHNSON & E. ERIOKSON.

SEWING MACHINE.

APPLIOATION FILED MAY 19, 1913.

Patented Mar. 23, 1915.

6 SHEETS-SHEET 5.

ll m clnwwm,

. L. E. JOHNSON & E. EPLHTKS'ON.

SEWING MACHINE.

APPLICATION FILED MAY 19, 1913.

1 a, Patented M21323, 1915,

6 SHEETS-SHEET 6.

cam for operating the looper.

.assrenons no vro'ron snon raaonrnnnr so on season A tl llliln sn nrnontnenntn .Khn 'v i Lilohi il ll Specification oztftottera.

Patented 29th,

implication filed may 1.9, 1913. Serial No. 76$,t5l71.

To 0:55 whom it may concern:

Be it lrnovvn that We, Lawrnnon lid. donnson a citizen ot the United States of America and a, resident ot" Winthrop, in the county of Suflollr and State ol Massachusetts, and Fimvano Fruonso), asubjectot h King, Swedernandresident of Lynn, in the county of Essex and State or Massa hneetts,.haveinvented certain new and usef l. thaw/enema in Sewing-Machines. of which tbetollotving is a specification.

This invention relates to improvements in shoe-sewing machines, and more especially to loehstitch Wan thread machines tor stitching outer soles of shoes to the Welt, and it consists in certain novel teaturesof constrnetion and arrangement of parts which vvillbe readily understood by reference to thedescription-ol the drawings and'to the claims hereinafter given @t' the drawings? Figure 1 represents a plan of a serving machine embodying the invention. Fig. 2 represents a front elevation of the some. Fig. 3 represents an elevation of the left end of the same. Fig. l represents an elevation of the right end of the same. Fig. 5 represents a vertical section of the same, loohing to the right, the cutting plane being on line 55 on Fig. 1. Fig. 6 represents a vertical section of the same, looking to the left, the cutting plane being on line 6 6 on Fig. 1. Fig. 7 represents an elevation of the needle and awl driving members and showing the looper hook and the cam for operatingit. Fig. 8 represents a plan of the rear end of the looper support and showing in section a portion of the Fig. 9 represents a sectional detail of the shuttle cap locking; mechanism, the cutting plane being on line 9-9 on Fig. 3. Fig. 10 represents a transverse section of the same. the cutting plane being on line 10-l0 on Fig. 9. Figs. 11 and 12 represent details of the looper to be hereinafter described.

Similar characters designate litre parts ihroughont'the several figures of the draw "HTS.

in the drawings, is the base ot themachine adapted to be secured to a column and having the end linmea 2d and pro vided with hearings tor the revoluble shaft 9 3. The revohrbleshaft-'23 has thedriving wheel .btsecnred to one end thereof want to its opposite end isrheyeds-the-cam 25. interposed between the side frames Ql, and 22and lreyeoltothe shaft 23 are the cam. dislrs Qdand d7. To the-inner side of the .sideifrarno 21 is sect-med the Work support 28. which -may' be of any Well-known construction, the securing means consisting of. the bolts 29-29. The side "frame 21 has also formed upon its inner face a race 3G for the shuttle. 31 which is driven by a plate 311 having a shuttle engaging lug 312 and provided with a shank 32 having; keyed to its outer end a gear 33- partially surrounded by the flange 34: termed on the outer face of the side frame 2t. Meshing? With the gear 33 1s a gear segment 35 termed upon the end of a lever 36 pivoted at 37 to the side frame 21, the opposite end or arm of said lever being articulated at 38 to a connectingrod 39 pivotally connected to the cam dish by the, stud 40. FVhen the cam dish) 25' is rotated in the direction otthe arrorv a: on Fig. 3 an oscillating movement will be imparted to the segment by the connecting rod 39. lit will be observed that the total length of the operating arm of the lever 86 and the connecting rod 39 between the centers of the stud t0 and pivot 37 is greater than the direct distance between saidpoints so that it is impossible torthese members to come into alinement under-any condition. Thi oscillation ofthe segment 3L5i rvill part the required inovementto the. plateau and through the lug 312' ,to 'thnfshuttlefit. The shuttle 3lis provided with axcap d1 pivoted at d2 tojtheside frame EZL said cap beingadapted to-be moved about its pivot to permit the removal ot the shuttle 31 when it is desired to renewtha bobbin. Normally the cap it is'retai'ned in the position shown in thedrarvings by. the locking member. at extending therofrorninto-a slot in the extension 44 ot' the side frame 21. In a bearing in the extension ist is a member 45 having a depression in its inner end into which extends the outer end of the member 48 which. is provided with a pin 46 normally engaging a notch d? in the member 45 to-lixuitthe oscillation of the member 45 about its axis A portion of the wall of said depression 18 titl cut away to permit the removal of the locking member 43. The outer end of the member 45 has secured thereto by a nut 431 a handle 48 by which said member 45 may be moved sufficiently about its axis to cause the cut-away portion thereof to register with the slot in the arm 44 and thus permit the locking member 43 to be removed from the depression in the end of the member 45 and the cap '41 to be moved upwardly about its pivot 42 so that the shuttle 3l may be removed.

The cap 41 is provided with a chamber 56 adapted to receive a heater the heat from which will keep the wax thread T within the shuttle 31 in condition for use.

The frame 22 is provided with two parallel studs or pins 60, 61, on which is mounted a movable frame 62. This frame has pivoted to the lower end thereof at 63 an oscillating vslotted lever 64 the lower end of which is provided with a roller 65 extending into a cam path 66 in the periphery of the cam disk .27 In the slot 67 ofthe lever 64 is a fulcrum block 68 pivotally mounted in a forked member 69 having a shank 70 extending through a straight slot 71 in the frame 22 and also through a slot 72 in a hand lever 73 pivoted at 74 to the end frame 22. That portion of the shank that travels in the slot 71 is flattened to fit saidslot and be guided thereby. The shank 70 is surrounded by washers 75 between which is a spring 55 tending to retain the lever 73 against the flange around the slot 71, the friction thereon being suflicient to lock the lever 73 in adjusted position. The washers 7 5 and spring 55 are retained in position by means of the nut 76. It is obvious that when the cam disk 27 rotates, the cam path 66 thereof will operate upon the roller 65 to actuate the lever 64 about its fulcrum thereby moving the frame 62 a given distance, this distance depending upon the position of the fulcrum pin 77. The inclination of the slot 71 conforms to that of the 'lever 64 to permit the free movement of the forked member 69 lengthwise of the lever 64 without binding thereon.

By means of the handle 73 the position of the fulcrum block 68 may be changed at will to secure any desired degree of feed. It is obvious that the shank 70 will be moved in the slot 71 during the movement of the hand lever 73 about its pivot 74, and when adjusted the friction on the lever will be Suf ficient to retain it in thisposition. When desired the nut 76 may be adjusted so that the lever 7 3 will be ositively locked so that a continuously uni orm feed of the work will be obtained. The frame 62 has a long bearing formed therein in which is mounted the shaft 80 having pinned to its outer end a, collar 81 provided with an ear between which and a pin on the upper end of the frame 62 is interposed a spring 82 adapted normally to retain the needle guide 83 se cured to the opposite end of the shaft 80 in proper relative position to the needle 84 carried by the needle support 85. The guide 83 is normally positioned by the pin 833 in the hub thereof bearing against a wall of said needle support 85, said pin being retained in this contacting position by the spring 82. The needle guide 83 is provided with a slot 83* at its outer end which retains the oil therein and serves as a means for lubricating the needle as it moves through said guide in either direction. When the needle 84 is operating the guide 83 is caused to move with the needle support 8.3 by the tension of said spring 82 until the ear on the collar 81 comes into contact with the pin 811, when further movement of the guide 83 will be prevented.

The needle support 85 has a gear segment 86 formed thereon and is provided with a tubular sleeve 86 surrounding the shaft 80 in the long bearing in the frame 62 and about the axis of which it is adapted to be oscillated by the lever 87 having formed thereon at one end a gear segment 88 meshing with the gear segment 86. a The teeth of the gear segment 88 are of sullicient length to permit the teeth of the gear segment 86 to remain constantly in mesh during the movement of the frame 62 in either direction. The lever 87 is pivoted at 89 to the frame :21 and is provided at its rear end with a roller 90 in the cam path 91 formed in the cam disk 26. During the rotation of the disk 26 the cam path 91 operates upon thev roller 90 to give the required movement to the needle segment at the proper time. The needle support 85 has also secured thereto the awl 911 positioned thereon so as to enter a slot in the work support 28 and the work supported thereby during a portion of the oscillation of said needle support, this awl being in the same vertical plane with the needle 84.v

The lever 87 is provided on one side with a cam extension 92 adapted to act upon a roller 93 on a bell crank lever 94 pivoted at 95 to the side frame 21 beneath the shuttle race 30. The forward end of the lever 94 has secured therein a looper hook 96 and a spring 97 is provided to retain the roller 93 in contact with the cam extension 92 at all times. The lever 87 is provided with an upwardly extending arm 98 to the upper end of which is pivoted a link 99 the opposite end of which is articulated to a loop spreader the upper end of the movable frame 62. The forward end of the spreader 100 is curved dmvnwardlv and rearwardlv as indicated in Fig. 6 and its left hand edge is inclined as v100 pivoted at101 to the hub 102 formed on shown in Fig. 2. This mechanism provides a simple means for spreading the loop of thread at the proper time for the book of the shuttle 31 to enter the same.

The thread is drawn from any suitable source of supply and passes over a fixed rod 103 extending from one side frame 21 to the other 22, a pin 101 extending outwardly from this rod 103 positioning the thread If thereon and preventing it from slipping lengthwise thereof. The thread It then passes around a pin 105 secured to the thread lock cam lever 106 which is pivoted at 107 and has at its rear end a roller 108 in the cam path 109 formed in the right hand side of the disk 27. The thread t passes from the pin 105 over a stationary pin 110 in the side frame 22 and then through slots in two downwardly extending arms 111 of a forked member 112. The thread it passes from one arm 111 to the other arm 111 under a stud or pin 113 projecting horizontally from the side of the forward end of the lever 108. From the forked member 112 the thread t passes through a hole 114 in the movable frame 62 to an eye 115- on the side frame 22 and thence into the wax pot 116 secured to the side frames 21 and 22 by the screws 117. To the front wall of the wax pot 116 is clamped, by means of the clamp screw 118, a support 119 having two arms 120 extending into the wax pot 116, each arm 120 being provided with a sheave 121 around which thethread t passes through the liquid wax in said pot 116. Having passed through the wax pot the thread t extends through an eye 122 secured to the end frame 21 and then over a sheave 123,

revoluble about a stud on the end frame 21. and around a sheave 12 1 revoluble about a stud secured to the end of a takeup lever 125 pivoted to the frame 21 at 126 and having articulated thereto at 127 a link 128, the opposite end of which is pivotally connected to a cam lever 129 pivoted at 130 to the frame 21. The free end of the lever 129 is provided with a roller 131 in a cam path 132 formed in the side of the disk 25, said path being provided with the necessary throws to actuate the takeup lever 125 at the proper time to take up the slack in the thread. The thread 6 passes from the sheave 124: on the takeup lever 125 to the eye 51 in the looper member 127 secured to the forked member 128", the downwardly extending arms 129 of which straddle and are pivoted to the squared end 130 of an oscillating member 131*. This member 131* has a bearing in the end frame 21 and to its outer end is secured an arm 13 between the outer end of which and an eve 133 in the base 20 is interposed a spring 134. The rearwardly extending arm 135 is provided with a roller- 136 positioned in the cam path 137 in the periphery of the dish 26 and other rollers 1518 held in contact with the periphery of the disk-26 by the spring 133. The periphery of the disk 26 is provided with a throw 139 adapted in the rotation of said disk to oseillate said member 130"131 about its axis while the throw 110 inthe cam path 137 is rocking the member 135 about the axis of the pivot pin 111, the combined action of these throws forming the necessary loop around the hook of the needle 81 after it has passed through the work and is extending through the slot of the work support 28. The extreme upper end 126* of the looper 127 is provided with an eye 51 and a finger 52 extending beyond the end of said eye 51. The eye 51 and finger 52 form a slot in which the needle 81 is temporarily positioned during the formation of the loop.

The loop spreader 100 operates in the same plane with the. hook of the shuttle 31 and when the barb of the needle St has drawn the loop of thread through the work the tapered end of saidspreader will enter between the two portions of the'thread on said barb and spread them apart so that the shuttle-hook will be sure to enter. When the needle 84- has passed through the work so that its barbed end extends below the work support 28 the looper hook 96 will also be moved downwardly so that when the looper 126 operates the thread (3 will not only be placed upon the barb .of the needle 84: but it will also be carried around the hook 96 so that a given amount of thread will be always measured 0d to be carried through the work by the needle 84 preparatory to its coacting with the shuttle in the formation of the stitch. Uwing to the pivotal connection of the looper support 128 whereby it may be tilted in either direction by the cams 139 and 140, the looper 126 will have imparted to it an orbital movement in a path eneirling'that in which the needle 8t moves and also about the looper book 96, the cams 139-140 being so constructed and timed that this movement will occur when the needle has passed through the work and lies within the orbit of the looper.

As has been stated, the needle 81v and the awl 911 are in the same vertical plane and oscillate about' the same axis so that the entering of the needle 8-1 into the hole in the work formed by the awl is always assured and no opportunity is afforded for them to get out of register.

,The needle and awl support 85 is mounted on a movable frame 62 and when the awl is in the work the latter may be fed relative to the work support, the len th of feed being determined by thehan le 73, it being obvious that by means of the devices con trolled by said handle a change in the feed may be obtained at time while the ma-.

chine is running.

It will beseen that by the construction shown and described, a very compact sewing machine is provided in. which the parts are reduced to a minimum. The machine is particularly adapted to be used by unskilled labor such as shoe repairers, although it may be used equally as well on new work.

It is believed that the operation and many advantages of this sewing machine will be fully understood from the foregoing description.

Having thus described our invention, we claim: 1. In a shoe-sewing machine, a stitchforming mechanism consisting of a needle, an oscillating shuttle, driving mechanism for said shuttle, a loop-forming mechanism, 'neei'lle-operating mechanism, including a cam-controlled lever, a tapered spreader mounted to operate in a plmeparallel to the needle, and connections between said cam-controlled lever and spreader adapted to cause the latter, by the operation of the former, to be oscillated to expand the loop 4 held by the barb ofthe needle as the shuttle cooperates: therewith.

2.- In a shoe-sewing machine, the combination of a needle; operating mechanism therefor including a camcontrolled lever; a loop-spreader comprising a tapered finger mounted to operate in a plane parallel to the needle and having its operating end curved rearwardly; a support therefor; and means operable by the cam-controlledlever for moving the spreader transversely of the loop held by the barb of the needle.

3. In a shoe-sewing machine, the combination of a needle; operating mechanism therefor including a cam-controlled lever; a shuttle, a pivoted loop spreader comprising a finger mounted to operate in a plane with the hook of the shuttle and parallel to the needle, said linger having a tapered end curved rearwardly; and means connected with said cam-controlled lever for-moving said spreader about its pivot and causing it to expand the loop held by the barb of the needle as the shuttle cooperates therewith.

4. In a shoe-sewing machine, a stitchi'orming mechanism consisting of an oscil- I to cause its wedge-shaped operating end to enter the loop held by the barb of the needle and spread said loop as the shuttle cooperates therewith.

6. In a shoe-sewing machine, a stitch forming mechanism consisting of a needle,

a shuttle mechanism, a loop forming mechanism, and a looper hook adapted to be retamed in a stationary position within the .orbit of the looper during the formation of the loop.

7. In a shoe-sewing machine, a stitch forming mechanism consisting of a needle, a shuttle mechanism, a loop forming mechanism, a looper hook adapted to be retained in a stationary position within the orbit of the looper during the formation of the loop;

and means for withdrawing said hook prior to the movement of the needle to draw the loop through the work.

8. In a shoe-sewing machine, a stitch forming mechanism consisting of a needle, operating mechanism therefor, a shuttle mechanism, a loop forming mechanism, and a looper hook operable by said needle operating mechanism and adapted to be retained in a stationary position within the orbit of the looper during the formation of the loop.

9. In a shoe-sewing machine, the combination of a needle; a support therefor provided with a gear segment; a cam controlled lever having a gear segment meshing with said needle support gear segment; a pivoted looper hook; means on said lever for moving said hook about its pivot; and a looper adapted to form a loop about said needle and hook. I

10. In a shoe-sewing machine, a stitch forming mechanism consisting of a needle, a shuttle mechanism, and a loop forming mechanism combined with a pivoted looper hook movable in a vertical plane and adapted to be moved into the orbit of the looper prior to the formation of the loop and retained in this position until the loop has been completed.

11. In a shoe-sewing machine, a stitch forming mechanism consisting of a needle, a shuttle mechanism, a loop forming mechanism, and mechanism for operating said needle, combined with a pivoted looper hook, Signed by us at 19 Columbia st., Boston, and a cam member operated by said needle Mass, this 13th day of May, 1913.

operating mechanism adapted to move said 4 hook into its operating position inthe orbit LAWRENCE JOHNSON of said looper and return it to its normal EDWARD ERICKSON' position, said cam being timed to produce Witnesses: said movements before and after the forma- WALTER E. Lommm),

tion of the loop. NATHAN C. LOMBARD.

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