US1306605A - moffatt - Google Patents

Description

1. R. MO'FFATT.

SEWING MACHINE. APPLICATION FILED MAYI4,1913.

1,306,605. Patented June10,1919.

gm wi f/naoom k flue vamp J. R. MOFFATT.

SEWING MACHINE.

APPLICATION nuzo MAY 14. 1913.

Patented 11111910, 1919.

3 SHEETS-SHEET 2.

J. R. MOFFATT,

SEWING MACHINE. APPLICATION man MAY14. 2913.

1 ,306,605 Patented June 10, 1919.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

JAMES R. MOFFATT, OF CHICAGO, ILLINOIS, ASSIGNOR T 0 UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEWING-MACHINE.

. I Specification of Letters Patent. Patented June 10, 1919.

Application filed May 14, 1913. Serial No. 767,609.

To all whom it may concern:

Be it known that 1, JAMES R. MOFFATT, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in sewing machines, and more particularly tosewing machines which are adapted for stitching an edging or the like to a body fabric. 7

An object of the invention is to provide a sewing machine having spaced needles and cooperating devices for laying connecting loops between the lines of stitching, with a trimming mechanism located in advance of the needles for trimming and directing an edge of fabric between the needles, and also an edging guiding device which will guide an edging to the stitching mechanism in rear of the trimming blade, so that the trimmed edge may be connected to the edging by covering stitches.

A further object of the invention is to provide a device of the above character with a guard or guide for directing the trimmedoft' strip away from the stitching mechanism, which guard or guide may be readily moved away from the trimmer to give access to the parts of the stitching mechanism and the trimming mechanism in rear thereof.

These and other objects will in part be obvious, and will in part "be hereinafter more fully disclosed. 1

Inthe drawings, which show by way of illustration one embodiment of the invention, I i

Figure l is a front view of a machine having my improvements applied thereto;

Fig. 2 is a plan view showing the work support, the presser foot, the needles, the trimmer blade, the edge guide and the relative arrangement of the same;

Fig. 3 is a perspective view showing the arrangement of the same parts;

Fig. 4 is a vertical sectional view through the presser foot, the trimmer blade and the work support;

Fig. 5 is a detail in perspective showing the trimmer-o crating mechanism; the needles and the Iiioper;

Fig. 6 is a detail in perspective showing the work support, the throat plate, the strip guide and also the needles;

Fig. 7 is a detail showing an edging attached to a fabric.

In the drawings, I .haveshown a sewing machine whlch consists of a bed plate l carrying an overhanging arm 2, on which is pivoted a needle lever 3. This needle lever is vibrated from an eccentric strap 4 cooperating with aneccentric on the main shaft 5. A needle bar 6 at the forward end of the overhanging arm is connected to the needle lever, and carries needles7 and 8 A presser bar 9 mounted in the overhanging arm carries a presser foot 10 at the lower end thereof.

Cooperating with the needles above the work support is a loop-laying finger 11. This loop-laying finger is mounted at the lower end'ofa shaft 12, which is journaled in a sleeve 13, carried by a support 14:. This supportis mounted so as to slide back and forth in a bracket 15 carried by the head of the machine. The support is connected by a link 16 to a lever 17, which is oscillated from an eccentric on the main shaft.

The shaft 12, at its upper end carries an arin'which is connected to a link 18, and the link 18 in turn is connected to a lever 19, which is also oscillated from an eccentric on the main shaft. These eccentricsfor operating the levers 17 and 19 are sotimed as to move the finger across the path of the needles, and then rearwardly, so that it is returned in a path entirely in rear of the needles. In other words, the finger has substantially four motions.

*The finger 11 at its free end is formed witha hook 20. When the needles 7 and 8 are raised, the hook is moved into engagement with the needlefthread of the right hand needle, and forms a loop therein which is placed so that the left hand needle enters said loop, after which the finger is retracted from engagement with the needle thread, and is moved or returned in a path in rear of the needles, as above noted.

These parts are substantially shown and describedin the patent to R'G. Woodward, No; 67 9,660, granted July 30th, 1901,. and further detalled I description thereof is thought unnecessary.

"The shaft 12 is mounted so as to slide vertically in the sleeve 13. A spring 21 encircles'the shaft, bearing against a collar 22 fixed to the shaft at the lower end thereof, and against the upper supporting sleeve at its upper end; This spring normally depresses the shaft '12,and holds the finger 11 in proper cooperative relation to the needles.

An arm 23 is mounted on the presser bar and eXtends underneath the collar 22 on the shaft 12. hen the presser bar is raised, this arm engages the collar and lifts the shaft 12, thus raising the finger 11. The finger 11 at. its free end lies overthepresser foot and is so positioned as tomove close to the upper face of the presser foot. The spring for holding the shaft depressed and the arm 23 'forraising the same, permits the finger to be positioned as stated, and to be raised with the presser foot when the fabric is inserted in the machine.

Located in front of the stitching mechan'ism is a trimming mechanism which consists of an upper movable blade 24 and a lower fixed or stationary blade 25. The fixed blade is carried by the throat plate 26 of the machine, and is secured thereto in any suitable way. The upper movable blade 24 is carried by an arm 27, which is mounted on a support 28 consisting of spaced sleeves 29 and 30, which slide on guiding- posts 31 and 32. The support is moved up and down on the-guiding posts byv a lever83. This lever is formed with a cylindrical rib at the free end thereof which engages a forked arm 34 carried by the support for the trimmer blade.

The lever at its rear end is pivoted to a fulcrum post 35. Said lever intermediate its ends is forked, and engages an eccentric 36 on the'main shaft 5. As the shaft rotates, the lever will be oscillated, moving the sup port for the trimmer blade up and down on the guiding posts, which will causethe trimmer blade 24 to move vertically in the same path as it performs its trimming function. This trimming blade 24 is located directly in front of the needle 8, sothat the trimmed edge of the body fabric will pass between the needles 7 and 8. V

The presser foot 10 extends in front of the trimming member, and is formed witha rearwardly projecting and downwardly ex tending guiding member 37 forthe trimmedoff strip. This guiding member deflects the strip downwardly against the strip guide 38. The strip guide 38 is mounted on abracket 39 pivoted to the under side of the work support. Said bracket isformed with a vertical wall 40, which prevents the strip from being deflected .laterallywunderneath the work support. The strip guide at its upper end is curved upwardly andforwardly to insure the trimmed-oft strip being bent downwardly and guided to the forward part of the machine. -This guidingmember on the presser foot and the strip-guidecarried by the work support, insures thedirecting of the trimmed-off strip away from the parts of the stitching mechanism. The bracket supportingthe strip guide pivoted, so that said strip guide may be swung away from the stitching mechanism and trimming mechanism to give access to the parts thereof in rear of the strip guide. 7

From the above description, it will be noted that I have provided a sewing machine wherein a strip of fabric is trimmed and the trimmed edge is guided between the spaced needles of the sewing mechanism, while the trimmed-off edge is directed away from the stitching mechanism.

Inorder that an edging may be guided so as to be secured to the'trimmed edge of the body fabric, I have provided 'an edging guide, which con'sistsof a roller 41 mounted in'suitable supporting lugs 42 and 43, carried by' 'the presser foot 10. The presser foot 10 is formed with a lateral-1y projecting arm 44, which supports the lug 43. This guiding roller is disposed directly in front of the needles, and is substantially parallel with a line or plane passing through the needles. Said roller is also located directly overthe rear end ofthe trimming blade 24, so that an'edging strip passing over the roller may be led to the needles in rear ofthe trimming point.

The roller 41 is preferably provided with spaced notched disks 45, which are adapted to engagethe edging between the cross bars thereof and facilitate the guiding of the same. The presser foot is also provided with a guard plate 46, which-is curved laterally to give suflicient room for the movement of thelooplaying finger 11. This guard-plate extends vertically, and protects the operator from both the loop-laying hook or finger and the needles. Y

In Fig. 7 I have shown a body fabric F, which is preferably formed of knit material, the edge of whichhas been trimmed and an edging E secured thereto by stitches S. This edging is guided by the roller, as above noted, and placed relative to the trimmed edge of the body fabric, so that one needle will pass through the .edgingwhilethe other needle passes through the body fabric. The lines of stitching formed by the needle are connected-above the fabric by the looplayingv finger. 11, which carries one needle 7 thread into the path of the otherneedle, and

by the looper threads which engage the needle loops beneaththe material and join the same.

From Fig. 5 of .the drawing it will be noted thatthe operating member 33 forthe trimming device extends underneath the looper 47, While the looper carrier 27 on avhichthe blade 24 is mounted is infront of the needles -7 and 8 and the looper 47. In other words, by the construction above described, I. have provided a trimmer-operatiso ing mechanism wherein the trimmer is moved positively up and down from a main shaft underneath thework support, and at the same time provided ample space for the operation of the looper which cooperates with the needles beneath the work support.

It is obvious that minor changes in the details of construction and arrangement of parts may be made, without departing from the spirit of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination of stitchforming mechanism including spaced needles and devices for laying connecting loops between the needles, of a trimming mechanism having a trimmer blade located beneath the work support and projecting above and overhanging the work support directly in front of said needles, a presser foot, an edging guide carried by the presser foot and located directly above the trimmer blade, whereby an edging may be guided to the stitching mechanism in rear of the trimming point.

2. The combination with stitch-forming mechanism including spaced needles and devices for laying connecting loops between the needles, of a trimming mechanism having a trimmer blade located directly in front of one of the needles, whereby the trimmed edge passes between the needles, a presser foot, and an edging guide, consisting of a roller carried by said presser foot and located directly above the trimmer blade, whereby an edging may be guided over said roller to the stitching mechanism in rear of the trimming point.

3. The combination with stitch-forming mechanism including devices for forming connected rows of stltching, a presser foot, an edging guide roller carried by said presser foot in front of the needles of the stitching mechanism, and a trimming mechanism including a trimming blade supported beneath the work support and projecting above and overhanging the work support, said trimming blade being located in advance of the stitching mechanism.

4. The combination with stitch-forming mechanism including a plurality of spaced needles, a device for guiding an edging to said needles, a trimming mechanism located in advance of the needles and so arranged that the trimmed edge is guided between the needles and including a trimming blade supported beneath the work support and extending above and overhanging said work support, said trimming blade being also dis posed underneath the guiding means for the edging, and a strip guide for deflecting the trimmed-off strip away from the stitching mechanism.

5. The combination with stitch-forming mechanism including a plurality of spaced needles, a device for guiding an edging to said needles, a trimming mechanism located in advance of the needles and so arranged that the trimmed edge is guided between the needles and including a trimming blade supported beneath the work support and extending above and overhangin said work support, said trimming blade being also disposed underneath the guiding means for the edging, a presser foot, said presser foot having means for deflecting the trimmed-off strip, and a strip-guiding device for guiding the trimmed-off strip away from the stitch-forming mechanism.

6. The ,combination of a stitch forming mechanism including spaced needles and devices for laying connecting loops between the needles, a trimming mechanism including cooperating trimming blades disposed in advanceof the needle and an edging guide l0-- cated in advance of the needle and having its edging guiding portion directly above the trimming blades, whereby an edging passing over said edging guide may be directed in rear of the trimming blades and to the stitching mechanism without being trimmed.

7. The combination with stitch-forming mechanism including a needle, a presser foot, a trimming mechanism, an edging guide roller carried by the presser foot and located rearward of the cutting portion of the trimming mechanism and in advance of the needle, said guide roller being raised from the bottom of the presser foot, whereby a fabric passing over the trimming blades may engage said guide roller, said presser foot being cut away in front of the needle and in rear of the guide roller to provide a space for the fabric engaging said guide roller.

In testimony whereof, I aflix my signa ture, in the presence of two witnesses.

JAMES R. MOFFATT.

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

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