US1433241A - Sewing machine - Google Patents

Description

D. S..SEYMOUR.

SEWING MACHINE.

AFPLICATION man APR. 8. 1919.

Patented Get. 22, 1922..

9 SHEETS-SHEET I. M

D. S. SEYMOUR.

' SEWING MACHINE. ATPLICATION FILED APR. 8. 1919.

Patented. Oct. 24, 1922..

9 SHEETS-SHEET 2.

7 3 W mm N I ,5 x. W 4%? fi D. S: SEYMOUR.

SEWING MACHINE.

M'PLICAIION FILED APR. 8. 1919.

Patented 0013.24, 1922. v

9 SHEETS-SHEET 3.

D. S. SEYMOUR.

SEWING' MACHINE.

AFPLICATION FILED APR.8. l9l9.

M241, I Patented Oct. 24, 1922.

9 SHEETS-SHEET 4- D. S. SEYMOUR.

SEWING MACHINE.

AIPLICATION FILED APR-B. 1919.

9 SHEETSSHEET 5.

D. S. SEYMOUR.

SEWING MACHINE.

M'PLICATION FILED APR-8, I9l9.

Patented Oct. 24, 1922.

9 $HEETSSHEET 6.

D. S. SEYMOUR.

SEWING MACHINE.

APPLICATION FILED APR. 8. 1919. lfiwfifln 4 Patented 0ct.24,;1922.

9 SHEETS SHEET 7.

1 l 5 all. all 4 I w D. S. SEYMOUR. SEWING MACHINE.

AFPLICATION FILED APR.8.1919.

Patented Oct. 24, 1922.

9 SHEETS-SHED 8.

\Q@ 0% fig M as $5 msmmm D. S; SEYMOUR.

. SEWING MACHINE.

APPLICATION FILED APR. 8. 1919.

Patented Oct 24, 1922.

9 SHEETSSHEET 9.

r am d ea at, ieaa llltllttti stares attain nutter s. SEYMOUR, or onscreen; rnizrnors, ASSIGNOR reunion srnorar lunar-rim:

S, Ai COBFORATION OF ILLINOIS.

snwr'ne vrncnrnn.

Application filed April 8, To al whom it may concern: Be it known that I, DUDLEY S. SEYMOUR,

a citizen of thellnited States, residing, at

Oak Park, in the county of Cook, State of Illinois, have invented certain new and useful improvements n Sewmg Machines, of which the following 1s a description, reference being had to the accompanyingdraw- H152; and to the figures of reference marked thereon.

The invention relates to new and useful improvements in sewing machines, and more particularly to a looper mechanism including a looper co-operating with a," pair of needles to form a vamper stitch.

" An object of the invention is to provide a looper mechanism of the above character,

wherein the looper islmounted to move in a horizontal plane and 1s so disposed relative to the line of feedthat the lateral or needle i avoiding movement of the looper assists in ioldingfithe needleloops well back on the looper,so that the needles will both enter a with certainty between the body of the loop I er and the looper thread at a point in ad,

, 'vance of both needle loops and without the use of a notched looper and a retainer for the needle thread loops.

A further object of the invention is to pro vide a looper mechanism of the above character, wherein the looper is so mounted on therefrom and swung to a y and partly in vertical its carrier that it maybe disconnected position forready accessin threading. y n

These and otheriobjects will in part be yob viousand will in part be hereinafter more fully disclosed. i i In theidrawings which show by way ofillustration one embodiment of the inventiona i i v n, Figural is a front view showing apart of the sewing machine having my improved looper mechanism embodied therein;

Figure 2is a plan view of the work sup-. port; v i' a Figure 3 is aview partly in end elevation section substantially on the line of feed; a t

Figure 4: is a view in perspective showing a part of the looper operating mechanism; Figure is a sectional viewgon the line Figure 6 is a sectionalfview on the line fi -e7 OfFlgllI 5;

1919. Serial No. 288,434.

' Figure 7 is a planview showing the feed,

theloopers and the looper operating mecha- DISIIL; also showing in dotted linesportion of the work support;

Flgure 8 is a similar view but showing operating eccentrics and the parts immedi ately actuated thereby- FigurelO is a perspective view showing the feed dog, the needles and the needle guides; M 'M i I Figure 11 is a view similar tofFigure S. but showing the loopers retracted;

F igure 12 is a view showing more or less diagrammatically, the needle, the feed dog, the loopers and the looper carrier with the loopers at the rear end of their stroke, i

Figure 13 is a front view of the needles and the loopers positioned as in Figure 12; Figure M is a View similar to Figure 12. but showing the loopers at the forward end of their stroke and before their lateral move ment to avoid the needles *F igure 15 is a view similar to Figure 13, but showing theloopers in the position indicated in Figurel i; n

Figure 16 is a view similar to Figure 12, but showing the loopers as having moved laterally to open. the thread triangle for the entrance of the needles;'

Figure 17 is a view similar to Figure 13, but showing the loopersflas positioned in Figure'lfi. it

The invention is embodied in a looper operating mechanism for a sewing machine, which; is adapted to make a vamper stitch -that is, two rows of needle thread loops which are locked by a looper thread loop passing through both needle thread needles and at one side of the line of feed and means is provided for bodily shifting the pivotal support of the looper, so that the looper is givena lateral or needle avolding movement in a direotiQn forward of the needles and slightly to the side of the line of feed from which the point of the looper enthe looper and the looper thread at apoint well in advance of both needle thread oops extending about the looper.

The invention further includes means for mounting the looper carrier on its support, so that it may bereadi'ly disconnected from the support and the carrier shifted so that the looper may be moved from its normal working position underneath the throat plate to a point directly beneath and opening in the cloth plate, which gives ready access to th'e'eyes of the looper for threadthe same.

The invention will be better understood by a detail reference to the drawings which show one embodiment of the invention. I have shown the invention as embodied in a sewing machine having a base plate 1, on which mounted a work sup aort The work support 2 is provided with the usual throat plate 3, having needle openings t, t and feed slots 5. The work support is also provided with an opening 6 which is closed by a cover plate 7 mounted so as to slide in suitable dovetail grooves formed in the work support. The work support. is also provided with a movable sectionS, pivoted at 9 and extending along in front of the needles,-which section may be swung about the pivot to give ready access to the parts beneath the throat plate. The depending apron 10 of the work support is formed with an opening 11 directly in. :tront of the needles.

The sewing machine is also provided with the usual overhanging arm 12, in which is mounted to reciprocate a needle bar 13, which, as herein shown, is provided with two pairs of needles 14, 14 and 15, 15. The material is held on the work support by a presser foot 16, which is of'the usual construction. The material-is fed across the work support and to the stitching mechanism by a feed dog 17, which is mounted on a-feed bar 18. The feed bar 18 is pivoted to a feed rocker 19, which is oscillated by an. arm 20 connected to a crank 21 on the end of the main shaft 22. The feed bar 18 is raised and lowered by an eccentric 523, also mounted on said main shaft 22. These parts are of the usual construction, and a further detailed description thereof is not thought necessary.

(lo-operating with the needles it, 14, be; neath the work support, is a looper 2i, and co-operating with the needles i5, 15, beneath the worlr support, is a lOO JO, 2:). Both of the loopers 2i and 9-5 are mounted on the carrier 26. The looper carrier '26 is pivoted at to a support 28 (see Figs. 5% and ll), and the looper support 28 is in turn pivoted to a looper supporting lever 29. The looper supporting lover E39 mounted to turn on a fulcrum post 30. This fulcrum post is secured to the bed plate 1 of the nin chine. The forward end oi? the lever 22) is prov. led with two spaced lugs ill and the looper support 28 is in the form of a yoke havixuz; two arms 32 and 325, one of which extends below the lugs 31. and the other above the lu:"s L3" id. the are pivotally connected to he respe/ The pivotal points of the arms are no.7- only n line, but said pivots are also in line with the pivot of the looper carrier proper.

The lever $29 is provided with a bull stud at its other end, with which an eccentric strap 3 1 is comiected. This eccentric strap co-operatos with an eccentric $35 on the in shaft As the main shaft rotates the lever 29 will be oscillatrd, and this gives the bodily movements t the pivotal support for the loopers. The looper support 28 is oscillated about its pivots by a link 36, which pivotally connected at one end to a :allstud i0 carried by the looper support (see Fig. 3) and at its other end to a ball stud, l]. carried at the outer end o[ a lever 4C2. The lever 42 is fulcruiuod on a post mounted on the bed i. lntorniediate the ends oi the lever -12 is a hall stud ii, to which an eccentric strain 4-5 is connected. This eccentric strap co-operutes with an eccentric ll) on the main shaft 22. As this main shaft rotates the lever 12 will be oscillated and this will in turn oscillate the looper support and move the loopers into and out of the needle thread loops.

it will be noted from the drawings that the pivotal connection lrietwcen the looper support 28 and the lever trli a! one side of the line of feed, which is clearly indicated by the position of the Feed (log. and also in rear of the needles. This pivotal support is also in a line passing between the needles and at right angles to the line of the needles. By this positioning of the pivotal support for the loopers. the loopcr will move in a direction substantially tangential to the line of the needlcs-thut is, to a horizontal line passing through the two needles.

The action of the two loopers is identical and, therefore, in describin' the operation only one looper will be referred to in order to avoid confusion.

The needles 14, 14 are set diagonal of the said looper whereby it moves in a horizontal planefland tangentially to a line diagonal to the line of feed and parallel to the line containing the'needl'es as it enters the needle threadloops, means for shifting support in a horizontal plane toward the needles while the looper is in the needle thread-loops whereby the face of the looper will operate to draw the needle thread loops about the looper to one side so as to insure both needles entering a thread triangle in advance of the needle thread loops. y

2. In combinationwith a feeding mechanism', of a pair of needles arranged in a line diagonal to the line of feed, a threaded looper adapted to cooperate with said pair of needles, means for pivotally supporting said looper whereby it moves in a horizontal plane and tangentially to a line diagonal to the line of feed'and parallel to the line containing the needlesas it'enters the needle thread loopers, means for shifting said support in a horizontal plane toward the needles while thelooper is in the needle thread loops whereby the face} of the looper will operate to, draw the needle thread loops about the looper to one side so as to insure both needles entering a thread trian a in advance of the needle thread loops, said looper being dis- ,p'osjed so as to move in rear of the needles when entering the needle thread loop.

3. The combination of a feeding mecha nism, a pair of needles arranged in a line diagonal of the line of-feed, a looper cooperating with said needles, means for pivotally supporting said looper whereby the same moves in a'h'orizontal plane and in a path; tangential to the diagonal line of the needles and in rear of the needles when enteringthe needle thread loops, means for moving said pivotal support for carrying the looper to a position in front of the needles while in the needle thread loops, whereby the face of the looper which inclines to the line of feed assists in carrying the needle thread loops to one side of the path of the needles so as to insure both needles entering theloop'er thread loop in advance of the needle thread loops.

4. The combination of a feeding mechanism, a pairof needles arranged in a line diagonal of the line of feed, a looper co operating with said needles, means for pivotally supporting said looper, whereby its point moves in a horizontal plane and in a path tangential to the diagonal line contain ing the needles and in rear of the noodles as the looper enters the needle thread loops and means for moving said pivotal support toward and from the nect or carrying the looper to the opposite side of the needles while in the needle thread loops and while the feed moving! the tal-rir, whereby the combined action the l l of the fabric and the face of the loo yer on the {needle thread loops serves to holt the needle thread loops well to one side of the path of both needles.

5. The combination of a feeding mechanism, a pair of needles arranged in a line diagonal of the line of feed, means for opera-ting the needles, a'looper CO'UPOIRtlILfQ with the needles, means for pivotally supi ;iorting said looper, whereby the point of the looper moves in a horizontal plane and from a position at one side of the line of feed across the line of feed as it enters the needle thread loops, said pivotal support for the looper being arranged on the opposite side of the line of feed from the point of the looper when retracted, and means for movsaid pivotal support toward and from the needles for carrying the looper to the opposite side of the needles while in the needle thread loops.

6. The combination of a feeding mechanism, a pair of needles arranged in a line diagonal of the line of feed, means for oper ating the needles, a looper, a looper support. means for pivot/e f supporting said looper simport whereby the looper moves in a horizontal plane, said pivotal support for the looper being disposed at one side of the line of feed and in a line passing between the needles and substantially at right angles to the diagonal line tainii the l'1(. liill.S,:lllll means for bodily moving s id pivotal support for carrying the loopers from one side of the needles to the other.

7. The combination of a feeding mocha nism, a pair of needles arranged in a line diagonal of the line of feed, a horizontalh moving looper co-operating with the needles, a support for said looper, a lever on which said support is pivotally mounted. means for oscillating said support for giving a lateral movement to the looper, means for oscillating the support on the lever for moving the looper into and out of the needle thread loops, said last nannu moans including' a lover, a link connecting the lever to the looper support, and means for oscillating the lever, said lever and link being so disposed as to be substantially in a line when the looper is at the forward end of its stroke.

8. The combination of a feeding mechanism, a needle, a looper moving in a horizoncarried by said looper ineaeai tal plane and copperating with needle,

a yoke-shaped support for said looper, a

cillating the lever, and, nieansitor oscillating said looper supportuon itspivotal connec{ tion with saidlever.

9. The combination of a main shaft, a feeding mechanism operated from said main shaft, a looper mechanism operatcdifrorn' said main shaft [and including a lever pivoted to swing in ahorizontal plane and having spaced lugs, a yoke shaped support straddlingsaid shaft and pivotally connected to the spaced lugs on said lover, a looper for oscillatingsaid looper support.

10. The combination of a main shaft, a feeding mechanism operated" ttroin said main shaft, from saidrrnain shaft and including a lever pivoted to swingin a horizontal plane, and

a line when the looper end of its stroke.

havingspaced lugs, a yoke-shaped support straddling said shaft and pivotally con nected to the spaced lugsion said lever, a looper carried by said looper support, and means for oscillating said looper support,

means for oscillating the. lever from the main shaft, a link connecting the lever with the looper support, said linlrand lever to which it is connected beingsubstantially in is at thefforward 11. The combination of a work support, a throat plate carried by said work sup,- port, a looper mechanism disposed beneath the work support and including a looper moving in a horizontal plane and in a path extending rier on which said looper is mounted, an

oscillating support, ,1 ineans for oscillating SZLlCl support, means for pivotally mounting said carrier onsaid oscillating support, a

spring controlled latch for holding the carrier [1n a predetermined position on said support, and means forlirniting the move- Vlooper, a mounted, an osc llating support fonsaid movement of a spring controlled latch for locking the support, and means a looper mechanism operated,

with the latch, whereby matically lock the looper carrier when the beneath the throat plate, a car- ,12, Thecoinbination of a work, support,

a throat plate carried thereby, aj looper mechanism located beneath the worl: supincluding a horizontally moving port and earner on which saldlooper 1S carrier, said'carrier being pivoted to said oscillating support, a stop for limiting the the carrier on said support,

carrier to the support with the looper in normal position.

, 13. The combination of a work support, a throat platecarried thereby, a looper mechanism located beneath the work support and including a horizontally moving looper, a carrier on which said looper is mounted, an oscillating support for said carrier, said carrier being pivoted to said oscillating support, stop for limiting the move- 1118I1L0fth603-1Tl61 on said. support, a spring controlled latch for locking the carrier to the support with the looper in normal position, said support having a cam face co-o-perating the latch will auto- 881116 is, shifted to normal position.

nnent of the carrier when released tronifthe a support. lever having spaced lugs pivotally attached to said yoke-shaped support, means for os- 14. The combination of a looper support,j

a ,looper carrier pivotally mounted onsaid support, spaced lugs, a latch adapted toengage between said spaced lugs for holding the looper in normal posltion relative to the support, a spring for holding said latch between the lugs, a handle for lifting the latch, said support having a earn face on whichsaid latch rides to lift the same for causing the latch to automatically engage between the lugs when thecarrier is shifted to bringthelooperfto normal position.

In testimony whereof, I ture, in thepresence of'two Witnesses.

DUDLEY S. SEYMOUR. Witnesses:

S. GEORGE TATE, ARTHUR F LARRABEE.

a'llix my signa-

Images