US1152667A - Sewing-machine. - Google Patents

Description

F. T. STRUBECK.

SEWING MACHINE.

APPLICATION FILED 0150.8. 1913- 1,152,667. Patented Sept. 7, 1915.

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n stains PATEN E K FBANS '1. STRbBECK, 0F BEAGHMONT, MASSACHUSETTS, AS-SIGNOR TO THE SINGER 7 MANUFACTURING COMPANY, A CORPORATION- OF NEW JERSEY.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Sept. 7,1915.

Application filed December 8, 1913. Serial No. 805,228.

specification, reference being had therein to the accompanying drawings I This invention has for its primary ob ject to provide effective means for fulling the margin of knit goods and applying thereto a binding tape.

As preferably constructed, the ruffling mechanismcomprises a vibratory arm with means for varying its amplitude of vibration, and detachable coupling means whereby an independently movableswingingarm carrying the milling blade may be operatively connected with or disconnected from said arm. Arranged adjacent and at one side of the path of movement of the ruflling blade is a binder, while beneath said path of movement is a work-supporting plate preferably formed with convergent guideribs inclined relative to the direction of movement of the ruffiing blade and toward the binder.

The invention will be understood by reference to the accompanying drawings, in which Figure 1 is an end view of asewing machine embodying the present improvement, and Fig. 2 a perspective view of a portion thereof with the bracket-arm omitted. Fig. 3 is a perspective view of the rufiling blade, the ribbed work-supporting plate and the Fig. 4 is a front end view of the work-supporting plate and the binder with the body fabric and the binding tape in position. Fig. 5 is a perspective view of a section of knit goods with the binding applied thereto. Fig. 6 is a detail perspective view showing the preferred adjustment of the rufl'ling blade stop member upon the blade-carrying arm. a

The sewing machine frame is constructed with the usual bed-plate 1 and bracket-arm 2 in the overhanging portion of which is journaled the mainshaft 3 to the forward end of which is operatively connected the reciprocating needle-bar 4' carrying the needle 5 cooperating with the complemental stitch-forming mechanism beneath the .bed-

plate.

The feeding mechanism is constructed and operated substantially as disclosed in. my United StatesPateilt No. 986,652, of. March 14, 1911, comprising the lower feed-dog 6 and the upper feeding-foot 7 secured to the swinging bar 8 with its apertured upper end embracing the stud-screw 9 sustainedby the angle-lever 10. This angle-lever is provided with a lateral arm carrying the stud-screw 11 which is embraced by the apertured lug 12 of the collar 13 fixed upon the presserbar 14 which carries the presser-foot 15 disposed in advance of the feeding foot 7 and provided with the usual needle-hole.

the upwardly extending crank-arm 19 se-.

cured upon the rock-shaft 20journaled upon the head of the overhanging bracket arm. The rock-shaft 20 has fixed thereon a second crank-arm 21 carrying the stud-screw 22 embraced by the aperture'd extremity of the eccentric-rod 23 provided with a strap 24 whichis fitted upon the actuating eccentric 25 fixed upon the main-shaft 3. -From the means just described the presser-feet 7 and 15 derive alternating lifting movements.

The shank of the feeding foot 7 is provided with a lug carrying the pin 26 connected by the link member 27 with the pivotal pin 28 sustainedby the depending arm 29 of the upper feed rock-shaft 30 which is in practice connected with the lower feeding mechanism and from which the feeding foot 7 derives its work-advancing movements. a H

Intermediate its ends the eccentric-rod sustains the screw-pin 31 embraced by the apertured upper end of the depending link 32 connected at its opposite end by the screw-pin 33 with the lateral crank arm 34: fixed upon the rear end of, the rockshaft 35 disposed parallel with and beneath the rockshaft 20. This rock-shaft has upon its opposite end the depending arm 36 formed with a slot 37 which is overlaid by the swinging arm 38 having the slot 39 and sustained at its upper end upon the fulcrumpin 40 mounted in the head of the brackets arm adjacent the rock-shaft 20. A, coupling screw All is employed in a manner well known to pivotally connect the slotted arms 36 and 38, the shank of such screw passing through the slots in said arms and being adapted to be clamped in different positions of adjustment therein relatively to the actuating rock-shaft .35. o

J ournaled upon the fulcrum-pin is the 'rufiier-blade carrying arm 42 carrying at its free end the stud-screw 43 upon which is mounted the rocking plate 44 sustaining the rufiiing blade 45 which is pressed normally downward by means of the spring 46 embracing the stud-screw 43 and having one arm'connected with the plate 44 and the other arm in engagement with the stop-lug 47 of the rigid finger 48 clamped adjustably in position by means of the stud-screw 43.

The rock-shaft 20 and fulcrum-pin 40 are mounted in a common bearing-boss secured to 'the headof the bracket-arm 2, the inner face of the arm 42 resting against the end of such bearing-boss and both this arm and the overlying swinging arm 38 being confined against movement endwise of the fulcrum-pin 40 by the nut 40 applied to the end of the fulcrum-pin.

The arm 42 has in its forward face at the rearward edge the inclined notch 49 and adjacent aperture 50 adapted to be engaged by the extremity of the latch-pin 51 journaled in a socket 52 of the bracket-piece 53 which is secured to the swinging arm 38 and pressed normally outward by means of the spring 54. As represented in Fig. 2, the arm 42 is disconnected'fromthe arm 88, being held in retracted position by means of the spring 55 hooked at one end in the aperture 56 of said armand secured at the opposite end by means of the stud-screw 57 to the head of the bracket-arm.

By pressing the arm 42 downwardly, the bottom of the inclined notch 49 presses back the latch-pin 51 which snaps into the aperture 50 to couple the arms 38 and 42 to gether for a ruffiing operation. The disengagement of the latch-pin by retraction of its head 51 causes the uncoupling of the rufliing-blade carrying arm which returns to retracted position under the action of its spring 55. By provision of an arm for the rufliing blade separate from the swing ing arm 38 and providing detachable connecting means between such arms theruffling blade may be connected with and dis connected from its actuating mechanism without disarrangement of the adjustment of the coupling pin 41 which determines the amplitude of the ruffling movements.

Secured upon the sewing machine bedplate by means of screws 58 entering the slot 59 therein is the shank 60 of the binding guide 61having the usual U-shaped channel which in practice embraces the laterally projecting portion 45 of the ruffling blade 45. Beneath the path or range of movement 'of the ruffling blade is disposed the work-supporting plate 62 which is shown provided with the aperture 63 entered by the fastening screws 64 by means of which it is secured upon the bed-plate in advance of the sewing machine throat-plate 65 and at the side of the binding guide 61. The forward portion of this plate 62 adjacent the binder is upwardly ofiiset at 62 (Fig. 4) to provide clearance for the lower limb of the binder and permit the lower ply of the binding tape 6 to be directed freely beneath the margin of the body fabric f. This offset portion of the work-supporting plate is provided with the convergent standing guideribs 66 which are inclined relatively to the direction of feed and of movement of the rufiiing blade toward the binding guide. These ribs are so arranged and proportioned that they support the body fabric adjacent the binding guide under the action of the rufiling blade and serve to crowd the same edgewise into contact with the middle portion of the binding tape within the guide so as to insure uniformity in the overlap of th upper and lower plies of the tape upon the corresponding faces of the fulled body fabric. It is of course not essential to the present improvement that these guideribs be disposed upon a separate plate as they may obviously be formed directly upon the throat-plate, in so far as the performance of their specific function is concerned.

In the use of the machine, a binding may be applied to an unrufiied or unfulled body fabric when the ruffling blade carrying arm 42 is disconnected, as represented in Fig. 2, but when the latter is coupled, as indicated in Fig. 1, the ruiiling or fulling operation is added. By the mechanism described, the parts are so proportioned andtimed that the ruffling blade advances simultaneously with but more rapidly than the feeding foot 7 while the non-feeding presser-foot 15 is raised, and the retrograde movement of such parts occurs when the foot 15 is pressed upon the goods and the foot 7 is lifted. As the work advances under the rufliing action to crowd the same beneath the needle and between the edge of the rufliing blade and the feeding foot 7, it is simultaneously forced by the guide-ribs 66 between the upper and lower limbs of the binder whereby it is maintained in contact with the middle portion of the binding tape during the the blade 45 extended upwardly from the work-supporting plate. By this means, the disconnection of the arm 42 from the vibratory arm 38 not only permits such arm to swing upwardly to disengage the rufiiing blade from the work, but causes the blade to turn upon its fulcrum-stud 43 so as to direct its serrated worleengaging edge upwardly away from the work to prevent accidental contact with the work in the removal of the latter from the machine.

Having thus set forth the nature of the invention, what I claim herein is 1. In a sewing machine, the combination with stitch-forming and feeding mechanisms, of rufiiing mechanism comprising a vibratory arm, a swinging arm overlying the same and having a fulcrum remotely disposed relatively to that of the other arm, means adjustable toward and from said fulcra for pivotally connecting said arms together at different points, means connected with and adapted to impart to said vibratory arm operative movements, a ruffling blade carrying arm having a fulcrum coaxial with that of said swinging arm, a detachable connection between said coaxially fulcrumed arms, means for maintaining said rutlier-blade carrying arm retracted from operative position and disconnected from said swinging arm and a ruffiing blade sustained by said blade-carrying lever.

2. In a sewing machine, the combination with stitch-forming and feeding mechanisms, of rufliing mechanism comprising a vibratory arm, a swinging arm overlying the same and having a fulcrum remotely disposed relatively to that of the other arm, means adjustable toward and from said fulcra for pivotally connecting said arms together at difierent points, means connected with and adapted to impart to said vibratory arm operative movements, a rufiling blade carrying arm having a fulcrum coaxial with that of said swinging arm, means for confining said arms against movement lengthwise of their fulcrums, a spring pressed pin mounted upon one of said arms for engaging the other for locking said arms detachably together, means for maintaining said ruflling-blade carrying arm retracted from operative position and disconnected from said swinging arm, and a rufiiing blade carried by said blade carrying arm.

3. In a sewing machine, the combination with stitch-forming and feeding mecha nisms, of a binder, ruffling mechanism comprising a rufliing blade having a range of movement adjacent said binder, and a worksupport provided with a guide-rib disposed beneath the range of movement of and in operative relation with said rufliing blade and inclined to its direction of movement and toward said binder.

4. In a sewing machine, the combination with stitch-forming and feeding mechanisms, of a binder formed with spaced upper and lower laterally extending channel members, rufliing mechanism. comprising a ruffiing blade having a range of movement adjacent said binder, and a work-supporting plate disposed beneath said rufiiing blade adjacent the binder and having in its lower face a clearance recess to accommodate the lower channel member of said binder and upon its upper face a plurality of convergent guide-ribs inclined toward said binder and adapted to support a body fabric under the action of the rufiling blade.

5. In a sewing machine, the combination with stitch-forming and feeding mechanisms, of rufliing mechanism comprising a vibratory arm, actuating means therefor, a swinging arm, a detachable connection between said arms, means for retracting said swinging arm when detached, a ruifiing blade carried by said swinging arm, and means for directing the ruiiling blade away from the work when said swinging arm is retracted.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

FRANS T. STRCBECK.

Witnesses;

HARRY H. MAYER, JOHN P. MYRON.

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

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