US1573617A

US1573617A - Sewing machine

Info

Publication number: US1573617A
Application number: US599072A
Authority: US
Inventors: Harry W Krag
Original assignee: AMERICAN SHOE MACHINERY AND TO
Current assignee: AMERICAN SHOE MACHINERY AND TO; AMERICAN SHOE MACHINERY AND TOOL Co
Priority date: 1922-11-04
Filing date: 1922-11-04
Publication date: 1926-02-16
Anticipated expiration: 1943-02-16

Description

Feb. 16 1926.

H. w. KRAG SEWING MACHINE Filed Nov. 4, 1922 2 Sheets-Sheet l Feb. 16 1926. 1,573,617

. H. w. KRAG SEWING MACHINE Filed Nov. 4,, 1922 2 Sheets-Sheet 2 /,;m TTORNE YS i I @VENTOR 8 12y i 'MH Patented Feb. 16, 1926.

UNITED STATES" f 1,573,617 PATENT: OFFICE.-

HARRY w; KRAG, or s'n oUIs, MISSOURI, ASSIGNOR T0 AMERicAN SHOE MACI-iLIN- ERY AND TOOL COMPANY, ors'r. LOUIS, MISSOURI, A CORPORATION-0F MISSOURI. V

SEWING iviaciirnn.

Application filed November 4, 1922. Serial No. 599,072. I

To all whom z'zf-mag concern:

Be it known that I, HARRYWV. KRAG, a citizen of the United States, and a resident of the city of 'St. Louis and State of Missouri, have invented a new and useful Improvement in Sewing Machines, of which the following is a specification.

This invention relates principally to sewing machines of the type employing a straight needle and a presser-foot. One of the principal objects of the present invention is to produce a simple, economical and efiiclent guide demos for maintaining the line of stitches auniform distance from the edge of the work. Another object is to provide means for varying the location of the line of stitches with relation to the edge of the work; Another object is to provide means for pressing the work against the work support durlng the mechanical lift of the presser-foot. Another object is to operatively connect the guide device with the presser bar, whereby said device is adapted for movement with sa d presser-bar whenv the SELIHGlS manually lifted to msert or remove the work. The-invention consists in the combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawing, wherein like reference numeralsindicate like parts wherever theyoccur,

i Fig. 1 is a front elevation ofa portion of a sewing machine provided with a guide device embodying my invention;

Fig. 2 is 'a side elevation of the parts shown-in Fig. .1; v 7

Fig. 3 is a-plan view of parts located beneath the -s'titcher-head,"the presser bar being shown in horizontal section; and

Fig. tis a vertical section on the line in Fig. 2.

. The sewing machine shown in the a'ccom panying drawing comprises a stitcher-head .5 supporting a vertically reciprocatory presser-b'ar 6 having a laterally extending" presser-foot portion? adapted to press the work against a work table 8, which is secured to a shuttle-head 9 containing"a rotary shuttle 10.

plate 8 is provided with a removable-plate 11 having an upwardly projecting knife' The work supporting edge 11 located beneath and in; longitudinal alinement with the needle opening in said resser-foot. The knife edge 11 is adapted to engage the under surface of the work to cut a stitch receiving-channel therein. The hereinbetore described mechanism is Well known and it is considered unnecessary to of the shuttle-head portion 9 of the sew-'- 1ng machine, is a stud-bolt 13. A hand lever 14: hasa cylindrical hub portion 14* sleeved on the'bolt 13. The bolt 13 and hand lever 14 are held-in'place by a screw 3,'which is threaded into one end of the bolt, and a nut 13 which is threaded on the other end thereof. The inner end of the hub portion of the hand lever is provided with a radially extending lug or arni'l i adapted to support one end of a work guiding or gaging arm 15 which is pivotally secured to said hand lever arm 14: by means of a horizontal pivot screw 16. The Work-engaging arm extends forwardly and terminates adj acent to the presser-foot'7 in alaterally extending finger 15 that overhangs a 'h'ori 7 extending "80 Surrounding the bolt 13, betweenthe op zontally, disposed rearwardly finger 7? of the resser-foot.

posing surfaces of the lug 12-and the hub portion '14? of the hand lever 14, is a coil spring 17. One end of this spring is broughtforward and hooked over the pivotally sup.

ported arm 15; and the -opposite end of said spring extendsrea-rwardly of the bolt 13 and bears against the adjacent surface of H the ,fra'me of the sewingmachine. This sprlngserve's to press the'free end of the end with a depending lug 14 through which of a boss 19 that projects horizontally from the frame of the-machine. v The hub portion of the hand lever is split, as at 20; and a clamping screw-2'1 extends through one of the split portions and; is threaded into the other, whereby suflicient frictionmay'be developed between the'conta'cting surfaces of the hand lever and its supporting stud to' resist" rearward movement of the-gage arm under pressureof the work, but insuflicient to prevent manual operation of said hand lever." I

0o arm down on the work. The hub portion of the hand leveris provided at the outer The work is shown in the form of an upper layer A and a lower layer B that proj ects beyond the upper layer. In the present instance, the upper layer A may be considered as representing the welt of a shoe and the lower layer B may be considered as representing the layer that forms the sole of the shoe and is to be attached to the welt before trimming.

The operation of the device is as follows:

After the presser-foot has been manually lifted to permit the work to be properly positioned therebeneath, the resser-foot is lowered to press the work against the worksupporting plate. The hand lever is then manipulated to cause the pivot which supports the gage arm to move transversely of its axis, thereby forcing the free end of the gage arm into engagement with the edge of the welt and the upper surface of the untrimmed sole. The locating screw 18 is then adjusted to cause the end thereof to abut against the boss 10 of the frame of the sewing machine. The screw serves as an adjustable stop for limiting the forward movement of the gage arm. \Vhen in the position just described, the forward end of the gage arm serves as a guide or gage for maintaining the line of stitches a uniform distance from the edge of the welt; and, by reason of the downward pressure exerted on the gage arm by the spring 17, said gage arm serves also as a presser-foot to press thework against the work-supporting plate. Thus, a continuous pressure is exerted on the work whereby said work is pressed against the work-supporting plate during the mechanical lift of the presser foot and a stitch receiving channel of uniform depth is obtained,

Sufficient clearance is provided between the rea-rwardly extending finger 7 of the presser-foot and the overhanging finger 15 of the gage arm to prevent the gage arm from being lifted during the mechanical lift of the presser foot. However, when the presser foot is manuallylifted to its fullest extent to permit insertion or removal of the work, the finger on the presser-foot engages the finger on the free end of 'the pivotally supported gage arm and lifts said arm clear of the work.

The invention admits of considerable modification without departing from the invention; therefore, I do not wish to be limited to the exact arrangements shown and described.

What I claim is:

l. A sewing machine comprising a work support provided with a channel cutter, a presser-foot, and a spring-pressed member adapted to engage work comprising an upper layer and a lower layer projecting beyond said upper layer, said springpressed member being adapted to guide the work by contact with the marginal edge of the upper layer thereof and being adapted to press the work against said channel cutter by contact with the upper surface of the lower layer thereof.

2. A sewing machine comprising a work support provided with a channel cutter, a presser-foot, a spring-pressed member adapted to engage work comprising an upper layer and a lower layer projecting beyond said upper layer, said spring-pressed member being adapted to guide the work by contact with the marginal edge of the upper layer thereof and being adapted to press the work against said channel cutter by contact with the upper surface of the lower layer thereof, and means for adjusting said member transversely of said presser-foot.

3. A sewing machine comprising a work support provided with a channel cutter, a presser-foot, a springpressed member adapted to engage work comprising an up per layer and a lower layer projecting beyond said upper layer, said spring-pressed member bein adapted to guide the work by contact with the marginal edge of the upper layer thereof and being adapted to press the work against said channel cutter by contact with the upper surf-ace of the lower layer thereof, means for adjusting said member transversely of said presser-foot, and an adjustable stop for limiting the movement of said member towards said presser-foot.

4. A sewing machine comprising a work support provided with a channel cutter, a presser-foot, a spring-pressed member adapted to engage work comprising an upper layer and a lower layer projecting beyond said upper layer, said springspressed member being adapted to guide the work by contact with the marginal edge of the upper layer thereof'and being adapted to press the work against said channel cutter by contact with the upper surface of the lower layer thereof, means for adjusting said member transversely of said pressersfoot, an adjustable stop for limiting the movement of said member towards the presserfoot, and means carried by said presser-foot for lifting said member when said presserfoot is manually lifted. a V 5. A sewing machine comprising a work support, a presser-fo-ot, a fixed stud, a hand.

lever having a hub portion sleeved on said stud and frictionally engaging the same, and agage arm having one end pivotally supported on the hub portion of said hand lever with its free end in position to engage the work.

6. A sewing machine comprising a wor: support, a presser-foot, a fixed stud, a hand lever having a hub portion sleeved on said stud and frictionally engaging the same, a gage arm having one end pivotally supported on the hub portion of saidhand lever with its free end in position to engage the work, and an adjustable means carried by said hand lever for limiting the movement thereof in one direction. 7 7. A sewing machine comprising a work support, a presser-foot, a fixed stud, a hand lever having a hub portion sleeved on said stud and frictionally engagingthe same, a gage arm having, one end pivotally supported on the hub portion of said hand lever with its free end in position to engage the work, a spring for holding the free end of said arm down on the work, adjustable means carried by said hand lever for limiting the movement thereof in the direction of said work, and means carried by the-presserfoot for lifting the free end of said'arm when the presser-foot is manually lifted.

8. A sewing machine comprising a work support, a member pivoted to said machine for swinging movement towards and away from said work support, and a work engag- 7 ing arm having one end supported on said work support in position to engage the work, the other end of said arm being pivotally supported on said pivotally mounted member, said arm being adapted for independent swinging movement in directions r of November, 1922.

, ported at its lower end for swinging movement towards and awayfrom said work support, and a work-engaging arm' having one end supported on said work-support in position to engage the work, the other end of said work gaging arm'being pivotally supported 'on the upper end of said upright arm, said arm being adapted for free swinging movement in directions transverse to the pivotal axis of said upright arm.

10. A sewing machine comprising a work support, an upright arm pivotally supported at its lower end for swinging movement towards and away from said work a support, a work gaging'arm arranged with one end in position to engage the work, the

other end of said work gaging arm being pivotally supported on the upper end of said upright arm, and an adjustable stop movable with said upright arm and adapt ed to abut against said machine for limiting the movement thereof in one direction.

Signed at St. Louis, Missouri, this lst'day HARRY W. KRAG.