US1252696A - Looper-carrier for sewing-machines. - Google Patents

Description

w. H; HUGG.

I OOPER CARRIER FOR SEWING MACHINES.

APPLICATION FILED Nov. 6. 1914.

1,%52,696. Patented Jan. '8,'191s.

40, ATTORNEY WILLIAM H. I

JIERSIiiY;:ASSIG'NOIR, .TOLTHE' SINGER MANU- LOOPER-CARRIER FOB SEWING-.MAGHINES.

1 v Specification of. Letters Tatent.

. .PatenterLJ an. 8,1918.

Application filed November 6', 1914s" Serial No." 870,552.

' T all whom it may concern.

Be it known that'I, WILLIAM H. HUGG, a citizen of the United States, residing at Elizabeth, inthe countyof Union and State of: New "J ersey, have invented certain new anduseful Improvements in Looper-Carriers for Sewing-Machines, of which thefollowing is a specification, reference being had therein to the accompanying drawings.

This invention relates to that class of plural-needle sewing machines particularly of the chain-stitch type for producing simul- A 'taneously two or'more parallel seamswh'erein the lateral spacing apart of the needles is determined by the particular nature of" the work to'be performed. It has for its 1 object to provide an effective looper-can rier adapted to sustain a plurality of loop-- ers of uniform shape and size for all gages in which the needles are set, the loopers receiving their endwise or' loop-seizing movements in a direction approximating parallelism with the plane in which the needles are set and transversely of the di rection of feed of the work.

- According to the present improvement, the

"looper-supporting members is preferablyv looper-carrier comprises two looper-s'upport ng members having a common fulcrum" upon which they-receive their rocking loop'- seizing and shedding movements upon which they are relatively adjustable endwise of the looper-blades, means being provided for securing such'members together in their requisite positions to locate thapoints of the respective looper blades a distance apart equal to the spacing apartof the needles with which they cooperate. One of the formed with a boss upon which the other member is coaxially mounted for circular adjustment and which boss is adapted to receive the common fulcrum-pin upon which the loopers perform their operative movements.

In the accompanying drawing Figure 1 is an end elevation of the looper embodying the present improvement, with two loopers sustained thereby for cooperation with laterally spaced needles carried by a common needle-bar in a manner well known. Fig. 2 is a perspective view of the looper-carrier and loopers upon a larger scale. Figs. 3 and 4 are side elevations of the parts represented in Fig. 1, but showing the needles and loopers set at different gages.

' member 2 is shown formed with a slot 5 concentric with the bearing 4: to receive the shank of theclamp-screw S-tappedinto the looper-supportingmember 1 and adapted to '-clampthe two members together in'their desired position of adjustment around the axis'of the-bearing i. Within the axial aperture of "thebos's 3 is secured the fulcrum-pin 7 having'the head 8, upon which the compound looper-carrier thus formed performs its ':rocking movementa -The primary looper-supporting 'member-isiformed' in its upper portion with a lateral socket in which is secured by means of the set-screw 9 the flattened cylindrical shank 10 of the ball=stud-11adapted for connection with the actuatingmeans from which the looper carrier derives its rocking 'movements.

The members 1 and 2 have at their upper ends the usual socketsin which are secured by means of "set-screws 12 the shanks of loopers 13 and 14 ofwell-known form, with flat blades 15' and" 16 having lateral threadgrooves 17 terminating adjacent the looper- " points 19 and 20 in thread-eyes 18. 'Each looper-blade is shown formed :at the heel with an aperture 21 in communication with a threading slit22 at the upper ,edge of the blade, the body of the looper" lei having secured thereon the plate 23 formed with open guide-eyes 24 through which the threads are directed to the respective loopers.

The looper-blades cooperate with laterally spaced eye-pointed needles 25 and 26 secured in the multiple needle-clamp 27 carried by the reciprocating needle-bar 28 in the usual manner. The needles are spaced apart a distance corresponding to the gage of the seam to be produced, and one is set in advance of the other a distance equivalent to the spacing apart of the looper-blades, as represented in the drawing.

In Fig. 3 a comparatively narrow-gage needle-clamp 27 is employed, the component.

clamp 27 is" shown of a much Wider gage,

crum-stud 7 that the points 19 and 20 of the looper-blades are spaced correspondingly with the needles and withthe spacing. apart of the parallel seams to be produced, the

members 1 and 2 of the looper-carrier being secured in such adjusted position by means ofthe clamp-screw 6. In Fig. 4 the needleor loop seizing and -shedding movements;

According to the present improvement, the looper-blades are relatively adjustable concentrically with the fulcrum upon which they perform their operative movements,

. and therefore in all adjustments they bear practically the same relationto the needles and the work. Thus they are caused to seize the needle-thread loops in the most advantageous positions .of the respective needles" and to manipulate said loops in the comple tion of a stitch-forming cycle under precisely the same conditions intheir relation to the work to which the needle-thread loops are attached and the feed of the work.

In order to secure exact unformity in the relation of the loopers with the needles and the throat-plate, or the work sustained thereby, for difl erent gages of scam, it has heretofore been deemed necessary to employ difierent sets of loopers for each gage of seam, but according to the present improvement, the two parts of the looper-carrier are 'relatively adjustable in such manner that the points and heels of a single set of looperblades of permanent design are invariably at the proper distance from their axis of oscillation,regardless of the distance apart of the looper-points lengthwise of the looperblades. 7 I

Having thus set forth the nature of the in vention, what I claim herein is g V -1. 'A'niultiple looper-carriercomprising a primary looper-supporting member, a fulcrum therefor, an auxiliary looper-supporting member fulcrumed coaxially with the primary member, and means for securing said members together adjustably around said fulcrum, whereby in all adjustments of .said 'members the looper-blades mounted thereon are caused to bear the same relation to the needles and the work.

2. A multiple looper-carrier comprising a primary looper-supporting member formed with a boss to receive a fulcrum-pin, an auxiliary looper-supporting member apertured to fit said boss upon which it iscircularly adjustable, and means disposed 'ecentrically to said boss for securing said members together in different positions of adjustment, whereby in all adjustments of said members the looper-blades mounted thereon are caused to bear the same relation to the needles and the work.

V 3. A pivoted looper carrier, a looper fixed to said looper carrier, said looper carrier having a projecting flange concentric to the axis of the looper carrier, a looper support having an opening which receives said' flange and a slot, a set-screw passing through said slot into the looper carrier for holding the support in adjustable positions,' and a looper fixed to said support. H

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

WILLIAM. H. 'HUGG.

Witnesses:

HENRY A. KORN MANN, J 12., WILLIAM P. STEWART,

Copies oi, this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. C. j

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