US1981837A - Needle-stripper foot for sewing machines - Google Patents

Description

NEEDLE STRIPPER FOOT F'OR SEWING MACHINES Filed Sept. 7, 1953 Ma rtin Hem Zeb Wwneam needle-stripper foot is'substituted' for the regu- Patented Nov. 20, 1934 v l inure]: STATES PATENT; ormce v @Eo smog T FonsEwmG Mmmnommb, Elizabeth, N. J., assignor to'zThe ,"Singer 'Manufactm ing Company, Elizabeth;

N. J a corporation of New Jersey V i Application September 7, 1933, Serial No: 688,423

Claims. (01. nae-236) This invention relates to improvements in that the work is not properly controlled by the needle-stripper foot devices for sewing machines foot during the time that the needle-thread loop more particularly adapted for darningand emis being drawn up to set the stitches, because it broidering purposes, and has for an object to is at that time that the foot is raised from the 5 improve the stitch-forming: conditions incidental work. The needle-stripper foot according to the 80 to the employment of aneedle-str'ipper foot depresent invention is designed to control the work signed to permit manual shifting of the work more efficiently and, nevertheless, permit of raisduring the darning or -embroidering operation. ing the foot manually in the usual manner for Another object of thisinvention is to provide insertion and removal of the work.

a stripper-foot which, while so designed as to ef- Referring 'to the drawing, a sewing machine 66 iectively control the work or the enchained to which the improved stripper-foot has been thread-loops while theneedle is out of the work, applied, has a work-support including the usual may be raised into an inoperative position without throat-plate 1 provided with a needle-aperture incurring the liability of breakage of parts should 2 and with feed-slots, as 3, through which operthe machine be inadvertently started in theraised ates a feed-dog 4. For embroidering or darning l0 position of the stripper-foot r V purposes, the work may be supportedand shield- The features ofthe invention will be undered from the feed-dog 4 bymeans of a coverstood from an inspection of the accompanying plate 5 which overlies the throat-plateand may drawing and the following detailed description of be secured thereto in any usual manner. An

; a preferred embodiment of the improved needleexpedient well known in the art as a substitute 75 stripper foot illustrated therein. for the feed-dog cover-plate involves the pro- In the drawing, Fig. 1 is a front side elevation, vision of meanswhereby the feed-dog does not with the work-support in section, of a portion of p oject above the usual throatepla during J asewing machine to which/the improved attachp r ion of the ma h n i is h refore to ment has beenapplied, the stripper-foot bein be understood that the present invention is not so shown i n rm l operative position, Fi 2 limited to the employment of a feed-dog coveris afront end elevation, with the work-support in p at section, of the parts shown in Fig. 1, but with Overhangi the wo pp rt is t .u ual the stripper-foot raised into inoperative position tm terminating at its free n in a h d and with theneedle-bar down. Fi '3 i n 6,in which a-needle-bar 7 is. journaled for ver- 5 I larged front side elevation of the attachment, tical reciprocation. The lower end ofthe needlewith the stripper-foot illustrated in dotted li bar 7 carries a clamp 8 in which is secured the as depressed in itssupporting member. Fig. 421s shank of a needle 9 in t p s t s a an m f t plan i of th tt h t, a thread-guide 10 projecting from the under side with the presser-bar in section. Fig. 5 is a front of said clamp. Any sui a le mechanism may be no end elevation, partly in section, of aportion of the employed below the t-P 1 as complehead of t ewing machine t; a n of mentary to the needle in the formation of stitches. f Dresser bar journaled therein Fig; 6 1- m- Journaled for vertical movement in the bracksents enlarged and separate perspective view f et-armhead6 is the usual presser-bar 11 of which e a m t the upperbearing comprises an adjustable bush- 5 'w employing sewing machine f ing 12 serving as an adjustable abutment for the broidering or darning purposes, it has been a co u p end of a p in 3 i d about the P es rmon practise to adaptthe machine to permit of ba T lower h 'e e Spring 13 b a s a ainst 's'hifti'ng'the work manually, between successive a collar 14 elhtably fiifed pq t e Presser-bar, needle reciprocations. To this end, various exsaideollar mep g with avleterally pedients have heretofore been employed to lift'the tehdmfg 8 15 Which overlies the cam-edge ofthe presser foot intermittently or to hold it raisedso usual hftel: lever iii-end depressed e ea t, that the work is freeto be shifted; In one form by the p g I of the devices more commonly employed, a special I T Dresser-i001? usually p y de S tching operations is in thepresent case detached lar presser-foot of the machine, which stripperfrom the lower end of the presser-bar 11, and foot is designed to yieldingly engage th w k substituted for said. presser-foot is an attachduringthework-penetrating movements of the merit more particularly adapted for embroidering needle and is raised while the needle-is out of and darning purposes. This attachment com- 5 the. work. .This expedient has the disadvantage prises an angular supporting member 1'7 shaped n to partly embrace the slabbed lower end of the presser-bar 11, one wall of said member 1'7 having a vertically elongated slot 18 receiving the usual presser-foot securing screw 19 and providing for vertical adjustment of said supporting member upon the presser-bar. As illustrated more particularly in Fig. 6 of the drawing, a slot 20 is out into the rear wall of the supporting memher to open into the vertically elongated slot 18,

whereby said supporting member may be applied 1 to or detached from the presser-bar without completely unthreading the screw 19.

The front wall of the supporting member 17 is formed or otherwise provided with reversely bent and spaced guide-lips 21 and 22, which together with said front wall define a vertical guideway. Vertically slidable in said guideway of the supporting member 17 is the flat shank 23 of a needle-stripper foot 24 extending forwardly from said shank and provided with a needle-aperture 25. A shoulder 26 projects from the lower end of a side edge of the stripper-foot shank 23 in position to engage the lower end of the guide-lip 22, said shoulder 26 constituting a stop limiting upward movement of the stripper-foot in its guideway. A spring 27 having one end entering an aperture 28 in the upper edge of the supporting member 17 and its other end entering an aperture 29 in the shank 23 of the stripper-foot acts to hold the shoulder 26 yieldingly against the lower end of the guide-lip 22, i. e., the spring 2'? acts to raise the stripper-foot a limited extent in the supporting member guideway and to support said foot in its operative position.

When applying the attachment to the presserbar, the supporting member 17 of the stripperfoot is vertically adjusted into a position such that the stripper-foot is spaced from the worksupport of the machine just sufiiciently to permit of manual shifting of the work between successive needle reciprocations, the stripper-foot being sustained against downward movement by the spring 27 which yieldingly holds the stripperfoot at its upper limit of movement in the supporting member of the foot. In this position of the stripper-foot 24,- the-work is held efiectively against excessive response to the drawing action of the thread while the needle is out of the work. Should an undue thickness of work be presented under the stripper-foot, the latter mayrespond thereto by an upwardly yielding movement of the presser-bar. When the stripper-foot is raised into its inoperative position by manipulation of the presser-bar lifter-lever 16, said stripper-foot is disposed in the path of movement of the needleclamp 8 and of the thread-guide 10 carried thereby, because of the initially raised position of the stripper-foot while in its operative position. However, the provision of the stripper-foot sustaining spring 27 permits of a downward yielding movement of the stripper-foot when engaged by the needle-clamp in an inadvertent operation of the machine, thereby obviating breakage of parts.

Having thus set forth the nature of the invention, what I claim herein is:

1. An attachment for sewing machines comprising, a supporting member, a needle-stripper foot mounted upon said supporting member for vertical movement thereupon, a stop limiting the upward movement of said foot upon said supporting member, and a spring yieldingly urging upward movement of said foot.

2. An attachment for sewing machines comprising, a supporting member having a vertical ed upon said supporting member for vertical movement thereupon, a stop limiting upward movement of said foot upon said supporting member, and a spring interposed between said supporting member and foot yieldingly acting to hold said foot at its upward limit of movement.

4. In a sewing machine, a reciprocatory needlecarrier, a work-support, a needle-stripper foot, and supporting means for said needle-stripper foot including a spring yieldingly acting in a direction away from said work-support to hold said foot in spaced relation to the work-support throughout complete reciprocatory movements of said needle-carrier.

5. In a sewing machine, a needle-carrier, a work-support, a needle-stripper foot, supporting means for said needle-stripper foot including a spring yieldingly acting in a direction away from said work-support to hold said foot in spaced relation to the work-support, and adjustable mean for determining the spaced relation of said foot and work-support.

6. In a sewing machine, a needle-carrier, a work-support, a presser-bar movable toward and from said work-support, a needle-stripper foot mounted upon said presser-bar for movement thereupon toward and from the work-support, and a spring acting upon said foot in a direction away from said work-support.

7. In a sewing machine, a needle-carrier, a work-support, a presser-bar movable toward and from said work-support, means for limiting the movement of said presser-bar toward the worksupport, a needle-stripper foot mounted upon said presser-bar for movement thereupon toward and from said work-support, a spring yieldingly acting to move said needle-stripper foot upon said presser-bar in a direction away from said Work-support, and a stop limiting the movement of said needle-stripper foot under the action of said spring.

7 8. In a sewing machine, a needle-carrier, a work-support, a presser-bar movable toward and from said work-support, means for limiting the movement of said presser-bar toward the work-support, a needle-stripper foot mounted upon said presser-bar for movement thereupon toward and from said work-support, a stop limiting the movement of said foot in a direction away from said work-support, yielding means acting to hold said foot at its limit of movement determined by said stop, and adjustable means for determining the operative position of said stop.

9. In a sewing machine, a needle-carrier, a work-support, a presser-bar vertically movable toward and from said work-support, means for limiting the movement of said presser-bar toward the work-support, a supporting member secured for vertical adjustment upon said presser-bar and provided with a vertical guideway, a needlestripper foot slidingly mounted in said guide- Way, a stop for limiting movement of said foot upon said supporting member in a direction away from said work-support, and yielding means acting to hold said foot at its limit of spring yieldingly depressing said presser-bar in a movement determined by said stop and in spaced relation to said work-support.

10. In a sewing machine, a work-support, a reciprocatory needle-carrier, a presser-bar, a

direction toward the work-support, means limiting the extent of movement of the presser-bar spaced relation to said work-support.

MARTIN HEMLEB.

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