US1863077A - Sewing machine loop-taker - Google Patents

Description

June 14, 1932. WATERMAN 1,863,077

SEWING MACHINE LOOP TAX ER Filed Dec. 24, 1950 Max L. Wafermaiz Patented June 14, 1932 UNITED STATES PATENT OFFICE MAX L. WATERMAN, OF FAIRFIELD, CONNECTICUT, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, OF ELIZABETH, NEW JERSEY, A CORPORATION OF NEW I JERSEY SEWING MACHINE LOOP-TAKER Application filed December 24, 1930. Serial No. 504,613.

This invention relates to improvements in sewing machine loop-takers and aims to provide a loop-taker having separable and mutually embracing cylindrical body-sections with a loop-seizing beak bent outwardly away from the loop-taker axis beyond the peripheral surface of the outer body-section. A further object of the invention is to provide for ready removal of the bobbin of a verticalaxis loop-taker, partially underlying the sewing machine throat-plate and having separable and mutually embracing cylindrical body-sections together defining a raceway for the bobbin-carrier.

' The foregoing and other objects and advantages in view, together with means whereby the same may be carried into eflect, will best be understood from the following description of a preferred embodiment of the 2 invention illustrated in the accompanying drawing, in which:

Fig. 1 is a top plan view of the improved loop-taker, including the bobbin-carrier and bobbin. Fig. 2 is a side elevation of the looptaker. Fig. 3 is a sectional view substantially on the line 33 of Fig. 1. Figs. 4 and 5 are perspective views of respectively the outer and inner body-sections of the loop-taker. Fig. 6 is a sectional view of the loop-taker body-sections substantially on the line 66 of Fig. 2.

V The present loop-taker was designed more particularly as an improvement on the rotary hook forming the subject of the U. S. patent to W. N. Parkes, issued Feb. 19, 1924, under .The loop-taker comprises an outer cylindrical body-section 1 closely embracing an inner cylindrical body-section 2 having a base 3 provided on its outer side with an annular rib 4 serving to locate the outer body-section. Depending centrally from the base 3 is a hollow. stub-shaft 5 adapted to be connected with suitable actuating mechanism (not shown) for rotating the loop-taker. The

outer body-section 1 of the loop-taker is fixedly but detachably secured upon the inner body-section 2 by screws 6 passing through countersunk apertures 7 in the outer bodysection 1 and threaded into apertures 8 provided in the thickened portion 9 of the inner body-section 2 adjacent to its base 3.

At its free end, the inner body-section 2 has an inwardly directed flange 10 and the outer body-section 1 similarly has an inwardly directed flange 11 overhanging the flange 10 and suitably spaced therefrom to provide a raceway 12 for a peripheral bearing rib 13 upon a bobbin-carrier 14 which is thereb journaled in the loop-taker body. A bobbin 15 is disposed within the usual thread-cavity in the bobbin-carrier 14, which latter is restrained against rotation with the loop-taker by any suitable means in the present instance comprising a lug 16 depending from a throatplate 17 to engage the walls of a notch 18 in a portion of the bobbin-carrier wall projecting beyond the loop-taker body. The throat-plate partly overlies the loop-taker and has feed-dog slots 19 and also an aperture 20 for a needle 21 which is endwise reciprocatory in a path substantially parallel with the axis of rotation of the loop-taker, it being understood from Fig. 3 of the accompanying drawing that the loop-taker illustrated is of the vertical-axis type.

The outer body-section l of the loop-taker is suitably cut away to provide thereupon a loop-seizing beak 22 and a loop-discharging spur 23, which latter is disposed in the cylindrical portion of the body-section l. The loop-seizing beak 22 is, however, bent outwardly away from the axis of the looptaker beyond said peripheral surface, as clearly illustrated in Figs. 1 and 6 of the drawing. By bending out the loop-taker beak in this manner the axis of rotation of the loop-taker may be spaced sufiiciently from the needle-path to provide for ready removal of the bobbin without interference by the overlying throat-plate and consequently the. regular principle of throat-plate construction may be followed, i. e., the edge of the throat-plate overlying the looper need not be cut away and unduly weakened adjato be passed about said bobbin-carrierr To I provide for the described contacting relationship between the'beak 22 and the nose 24, the latter is also bent outwardly away from the loop-taker axis beyond thecylinc'lrical surface of the inner body-section 2, as illustrated more particularly in Fig. 6 of the drawing Because of the inwardly projecting raceway fiange 11 of the body-section 1, it is obviously necessary to initially pass the cylindrical opposite end of said outer body-section 1 over the raceway-flange end of the inner body-section, when assembling said bodysections. To provide the necessary clearance for effecting the assembling of these parts, the outer body-section 1 is cut away below the beak 22 clear to the bottom of said section, thereby in effect providing a split ring having a channelorgap 25 to admit the outwardly bent nose 24 of the inner body member. This construction therefore provides for readily assembling the body-sections of a loop-taker having the advantage of a bent out beak in addition to the advan tages inherent in a loop-taker of the type described. The effect of the clearance-channel referred to might also be obtained by thinning the wall of the outer body-sectl on at the required. point or by bending or slightly crimping the wall of the outer body-section at, for instance, the location of the gap 25,.

instead of by entirely cutting away said wall.

Having thus set forth the nature of'the invention, what I claim herein is 2- v 1. A rotary loop-taker for sewing machines having separable and mutually embracing inner and outer cylindrical body-sections, the inner body-section having a thread-loop engaging nose disposed within the outer body section and extending outwardly away from the loop-taker axis beyond the cylindrical surface of said inner body-section, said outer section having an inner body-section-nose clearance channel extending to the base of the outer body-section and providing for separably uniting said body-sections in mutually embracing relationship.

2. A rotary loop-taker for sewing machines extending outwardly away from the looptaker axis beyond the cylindrical surface of said outer body-section, the inner body-section having a thread-loop engaging nose disposed within the outer body-section adjacent to said loop-seizing beak and extending outwardly away from the loop-taker axis beyond the cylindrical surface of said inner body-section, and said outer body-section having an inner body-section-nose clearance channel extending to the base of the outer body-sectionand providing for separably uniting said bodysections in mutually embracing relationship.

3. A rotary loop-taker for sewing machines having separable and mutually embracing inner and outer cylindrical body-sections together defining a raceway, a bobbin-carrier journaled in said raceway, the inner bodysection of the loop-taker having a thread-loop engaging nose extending outwardly away from the loop-taker axis beyond the cylindrical surface of said inner body-section, and the outer body-section having a loop-seizing beak extending outwardly away from the loop-taker axis beyond the cylindrical surface of the outer body-section, said outer body-section having a clearance-channel extending from its beak to the base of the outer body-section and providing for separably uniting said body-sections in mutually embracing relationship.

4. A rotary loop-taker for sewing machines having separable andmutually embracing inner and outer cylindrical-body-sections together defining a raceway, a bobbincarrier journaled in said raceway, the inner body-section of the loop-taker having a thread-loop engaging nose extending outwardly away from the loop-taker axis beyond the cylindrical surface of-said inner bodysection, the outer body-section having a loopseizing beak in contact with said inner bodysection nose extending outwardly away from the loop-taker axis beyond the cylindrical surface of the outer body-section, said outer body-section having a channel widthwise thercof'in alinement with said inner bodysection nose in a direction substantially parallel with the axis of rotation of the looptaker, and said channel extending to the base of the outer body-section to thereby provide for separably uniting said body-sections in mutually embracing relationship.- 1

5. In a sewing machine, a vertically reciprocatory needle, athroat-plate having a needle aperture, a vertical axis rotary loop-taker partiallyunderlying said throat-plate having separable and'mutually embracing inner and outer cylindrical body-sections together defining a raceway, a bobbin-carrier j ournaled in said raceway, the outer body-section of said loop-taker being cut away to constitute a split ring havin a loop-seizing beak and a clearance gap ad acent the beak, said 1001pseizing beak being bent outwardly from t e cylindrical surface of said ring away from the loop-taker axis, and the inner body-section having an outwardly bent thread-loop engaging nose disposed in contact with the inner face of said outwardly bent loop-taker beak and in alinement with said clearance gap in a direction substantially parallel with the axis of rotation of the loop-taker.

In testimony whereof I have signed my name to this specification.

MAX L. WATERMAN.

Images