US1156820A - Overedge sewing-machine. - Google Patents

Description

J. C. RINGE.

OVEREDGE SEWING MACHINE.

APPLICATION FILED JUNE 6.1914.

1,156,820. Patented Oct. 12, 1915.

- 2 SHEETS-SHEET I.

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' J. C. RINGE.

.OVEREDGE SEWING MACHINE.

APPLICATION FILED JUNE 6.1914.

1,156,820. Patented Oct. 12, 1915.

2 SHEETS-SHEET 2.

INVENTOR- coumma PLANOGRAPH co.,wAsnmo'r0.-, u. c

UNITED STA ii i A Q JOHN G. RINGE, BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE SINGER MANUFAC-f TUBING COMPANY, A CORPORATION OF NEW JERSEY.

ovnannen SEWING-MACHINE.

Application filed June 6, 1914. Serial No. 843,334. I

To -all'whom-z't may concern:

Be vit known that I, JOHN 0. RINGn acitizen of the United States, residing at Bridgeport, in the county of 'Fairiield and State of- Connecticut, haveinvented certain new and useful Improvements in Overedge. Sewing-Machines, of which; the. following is a: specification, reference being had therein i tothe accompanying drawings.

This invention relates to improvements in overedge' sewing machines and, has for its object to provide a locket-itch; sewing mas.

chine with improved means for carrying the needle-thread over the free edge of the fabric beingacted on and concatenated .with the lower or bobbin=thread-at the under side of the fabric. i

vln-the accompanying drawings, which form a part of the specification, Figure l-is a front side'elevation of a sewing machine fitted with the present invention; Fig. 2 an under side: view of Fig. 1'; Fig. 3 a' perspective of the improved mechanism detachedf-romthe sewing machine. Fig. 4diagramm'atic views illustrating the action of the thread-carrying looperat different stages in the formation of a given stitch: Fig. 5 is an enlargedview of the free end" of the thread carrying looper; Fig. 6 a View illus trating a portion of a seam as efl'ected by the present construction; Fig. 7 a plan of.

the loop-taker'showing' its loop-seizing point entering the needle-thread loop.

The presentinvention is shown as applied to a Singeranachine employing-a loop-taker operated in a horizontal-plane, but as it relates only to the construction andapphcation of the thread-carrying looper, only such reference will be made tothe other elementsof the machine as is deemednecessary for a properunderstandingof its application.

Referring" to the figures, '1'. represents the bed-plate upon which is mounted the bracket-arm comprising the arm standard 2 and arm bracket 3, 4 the main orneedle-bar driving shaft carrying at its rear'end the hand .or band-wheel 5 and at its opposite end the usual take-up cam 6 for actuating the take'up lever 7, the front face of saidcam being provided with a stud-bearing (not shown) upon: which is pivoted one end of aneedl'e-bar' actuating link 8 connecting the needleebar-9 with the main-shaft 4; 1

. 10 denotes a spring depressed clOthqoresser carrying bar'providedaat its lower end with of the shaft 12., e i '18 representstheloop taker providediwith'.

a suitablethread holding: case 18 and ear ried by the loop-taker shaft/l9- to: the lower end, of which is suitably secured"a..beveled gear 20. which meshes with 'a. like. gear 21" carried the loop-taker actuating. shaft, 17, thus giving to saidlooprtaker two rotations to one of the ina-ineshaft 4.

i 22 denotes the arm. bracket faceplate of- Specification of Letters Patent. Patented'act. 1915; v

usual construction and provided with acom monly employed threadcheck 23 threadtension 24- ,and' thread controller-25.-

. The .means employed for giving to the" fabric its feedlmoveinents and for controlling the amplitude of saidlmovementsmay be oflany. approvedi construction, one form of whichis partly shown'in the drawings, butit is notedeem'ed necessary tosp'ecifi'cally describe such. mechanism since it is well understood. f Y

Referring now to the parts more directly connected with the invention, 27 represents a shaft bracket secured by screws, as28, and depending from the underside of'.;the bed plate, 29 a rock-shaftmounted.tooscillate in suitable bearings formedin: said bracket and carrying a crank-arm 30provid'ed' with.

32, formed in the facecam 33 carried bythe as a follower 31'tracking a heartrca m groove i 1 crank-shaftlfl, the rock-shaft 29 carrying V a bracket-collar 34 provided with afguidepin35'. I I 36 represents an eccentric cam carried by too the loop-taker actuating shaft l? andpro V vided with an eccentric strap connection. 37, the outer end of which is connected by a' ball-and-socket joint 38' with an arm 39' of a bell-crank lever 40 pivoted on ajstud-screw- 41 threaded into the hubv42 of the shaftbracket, 27-, the arm 43 I of; said-bell-crankg lever, being. forked to embrace a collar 44 loose on the-shaft 29 and operatively connected with said collar by pintle screws, as 45.

46 represents a looper carrying bracket whose lugs 47 and 48 are provided with suitable openings to receive the rock-shaft 29 and arranged at opposite sides of the collar 44, said looper carrying bracket having a suitable opening 49 to receive the pin 85 and in a suitable opening 50 is secured, by screw 51, the thread-carrying looper 52 provided with a thread-engaging finger 53 and thread-engaging groove 54. v

Having set forth the details of the invention, the following mode of operation and cotiperation of the several parts will be readily understood: Referring now to the threadlooper 52 and its actuating mechanism as when occupying the positions illustrated 1n Figs. 1, 2 and 3', and in side elevation and plan views a; and Z2 respectively, of Fig. 4,

with the needle 55 at nearly its limit of upward stroke as shown in said figures and views, the initial action of the heart camgroove 32 on the crank-arm 30 acts to rock the free end of the looper 52 toward the needle and simultaneously with .said rockingmovement the eccentric cam 36, through the connections previously pointed out, moves the finger 53 laterally across the line of needle actuation and in contact with the needle-thread 56, as'shown in side elevation and plan views 0 and d respectively, of Fig.4. During the time that the cam-follower 31 is tracking the cam-groove 32 from the point illustrated, best shown in Fig. 3, to substantially the point 57, the eccentric cam acts to give to the looper its reverse lateral movement to position the free end of the looper as shown in views a and f, of Fig,

4, thus carrying the needle-thread over the edge of the fabric, see Fig. 6, and into the groove 54, as shown in Fig. 5 and in views 6 and 7, with the needle entering the needlethread looper loop 58, when the tracking of the cam-groove by its follower from the point 57 tothe point 59, or point of reverse action of said cam-groove, the free end of the looper is rocked away from the line of needle actuation so that in its'return movement from below the thread-plate the heelportion 60 of the looper will pass clear of the needle, as illustrated in side elevation and plan views 9 and it respectively, of Fig.

4. During the time that the follower is returning to its illustrated position the looper is rocked to its limit of upward movement, the eccentric cam in the meantime acting vto return the looper to its illustrated position, best-shown in views a'and'b. It being understood that the needle effects the usual thread-loopwhich is entered by the receivcatenating the latter with the needle-thread substantially as is illustrated in Fig. 6.

Having thus set forth the nature of the invention, what I claim herein is 1. In an overseaming sewing machine, the combination with a stitch-forming and cleth-feeding mechanism including a throatplate, a needle provided with, an upper thread and a loop-taker provided with a mass of under thread, of a needle-thread looper actuated to deliver said upper thread in the form of a loop over the free edge of the fabric being acted on and present said loop beneath said fabric to-be entered by said needle and concatenated with said under thread, said actuating means including a cam member having one complete actuation to a like actuation-of the needle for giving to said-looper rocking movements, and a cam-member having two complete actuations to one of said needle to give to said looper oppositely directed lateral movements at the upper, and at the'under side of said throat-plate. 7

2. In an overseaming sewing machine, the combination with a stitch-forming and cloth-feeding mechanism including a throatplate, a needle carrying an upper thread and a loop-taker provided with a mass of under thread, of a needle-thread looper actuated to deliver said upper thread in the form of a loop over the edge of the fabric and present said loop beneathsaid throat-plate to be entered by said needle and concatenated with said under thread, said actuating means including a cam-member for giving to said loopersubstantially uniform rocking movements and a cam-member for giving to said looper accelerated and retarded lateral movements, in the formation of a given stitch. I

3. In an overseaming sewing machine, the combination with a stitch-forming and cloth-feeding mechanism. including a rockshaft, a bell-crank lever, a throat-plate, a

needle provided with an upper thread and a loop-taker provided with a mass of under thread, of a needle-thread looper actuated to deliver said upper thread in the form of a loop overthe free edge of the fabric being acted on and present said loop beneath said fabric to be entered by said needle and concatenated with said under thread, said actuating means including a heart-shaped cammember 'operatively connectedv with said looper through said rock-shaft, and an eccentric cam-member operatively connected with said looper through the bell-crank lever, said rock-shaft and bell-crank lever acting to transmit to said looper rocking and lateral movements, respectively.

4. In an overseaming sewing machine, the combination with a stitch-forming and cloth-feeding mechanism including a rockshaft provided with a looper carrying bracket, a bell-crank lever, a throat-plate, a

needle provided withan upper thread and a loop-taker provided with a mass of under thread, of a needle-thread looper actuated to deliver said upper thread in the form of a loop over the free edge of the fabric being acted on and present saidloop beneath said fabric to be entered by saidneedle and concatenated with said under thread, said actuating means including a heart-shaped cammember operatively connected with said looper through said rock-shaft and looper carrying bracket, and an eccentric cam member operatively connected with said V looper through the bell-crank lever, said 15 name to this specification, in the presence I of two subscribing witnesses. V v v RINGE.

Witnesses: I

FRANK M.- WooT'roN, EDWARD H. Wo ens.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. 0'. l

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