US1020041A

US1020041A - Sewing-machine.

Info

Publication number: US1020041A
Application number: US64007011A
Authority: US
Inventors: John Kiewicz
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-07-24
Filing date: 1911-07-24
Publication date: 1912-03-12
Anticipated expiration: 1929-03-12

Description

J. KIEWIGZ.

SEWING MACHINE.

APPLICATION FILED JULY 24,1911. 1,020,041. I Patented Mar. 12, 1912.

3 SHEETS-BEBE?! 1- um'i'n' H J. KIEWIGZ. SEWING MACHINE-f APPLIOATIOIPILED JULY 24,1911.

Patented Mar. 12, 1912.

3 SHEETS-SHEET 2.

J. KIEWICZ.

snwma MACHINE.

APPLICATION FILED JULY 24,1911 1,020,041 Patented Mar. 12,-1912.

3 SHEETS-SHEET 3.

JOHN KIEWICZ, 0F HYDE PARK, MASSACHUSETTS.

SEWING-MACHINE.

Specification of Letters Patent.

Application filed July 24, 1911. Serial No. 640,070.

To all whom it may concern:

Be it known that I, JOHN KIEWICZ, a citizen of the United States, residing at Hyde Park, 'county of Norfolk, State of Massachusetts, have invented an Improvement in Sewing-Machines, of; which the following description, in connection withthe accompanying drawing, is a specification, like characters on the drawing representing-like parts. v I

This invention relates to lock stitch sewing machines of that type which employ a stationary shuttle, and the general ob ect of the invention is to provide a sewing machine of this type which has a comparatively simple construction and which can be run noise 'lessly and ate high speed.

The features wherein my inventionresides will be fully hereinafter described and then pointed out in the appended claims.

My invention may be applied to almost any type of sewing machineadapted to make the lock stitch, and as illustrating one application thereof I have shown it as it would be applied to a buttonhole sewing machine of the general type shown in Patents No. 714,284, dated November 25, 1902, and No. 749,776, dated January 19, 1904. I wish it understood, however, that my invention is not limited in its application to buttonhole sewingmachines of this type, but can be easily embodied in almost any type of sew ing machine.

. Referring to the drawings wherein I have illustrated one/embodiment of my invention, Figure 1 is a side viewof a portion of the bed of a sewing machine as shown in said before-mentioned Patents N o.- 714,284 and No. '749,776, with a part of the bed broken out to show the construction; Fig. 2 is a top plan view of the shuttle; Fig. 3 is a vertical sectional view through the shuttle and looper-carrying shaft; Figs. 4 and 5 are side views of the shuttle showing different positions of the looper; Fig. 6 is a sectional view through the shuttle on substantially the liner-w, Fig. 2; Fig. 7 is a horizontal sectional view through the shuttle on the line y y, Fig. 6; Fig. 8 is a plan view of the shuttle, looper and operating mechanism; Figs. 9, 10 and 11 are plan views of the shuttle and looper showing different positions of' the parts in the formation of the stitch; Fig. 12 is a'view showingthe looper-operating mechanism- Fig. 1315; a plan view of the stationary shuttle support;

'Fig. 14 is a plan view of the hold-down; Flg. 15 is a perspective view of the looper;

Figs. 16, 17 and 18 are views showing the manner in which the loop is taken from the needle and carried around the shuttle; Fig. 19 is a side view of the shuttle and holddown; Fig. 20 is a perspective view of the shuttle support.

In the sewing machine herein illustrated A represents a portion of the frame of the sewing machine and A the bed of a sewing machine, such as illustrated in said abovementioned patents. Situated above the bed is the usual overhanging arm, a portion of which is shown at l and which supports the needle 2 that is adapted to reciprocate in a vertical direction. The needle herein shown is an eye-pointed needle through the eye of which the upper or needle thread 3 passes in usual manner. Said needle reciprocates through an aperture in the throat-plate 4 carried by the bed plate A as usual in machines of this description.

The shuttle of the sewing machine is shown at 40 and it is a stationary shuttle situated beneath the throat plate and in position so that the needle reciprocates at one side. This shuttle is an open-topped shell provided with a central hollow stud 6 on which the bobbin 5 is supported in usual manner. On the interior wall of the shuttle is a tension plate 7 provided .with an aperture 8 through which the thread passes from the bobbin to an aperture 9 in the shuttle. Said tension plate is a spring plate yieldingly held against the inner wall of the shuttle and bears against the shuttle thread, as will be obvious.

The shuttle 40 is sustained on a stationary support or platform 9 which is centered and held in the proper position by the shaft 10 that carries the looper 11. This shaft 10 is mounted for turning movement in a bearing 12 carried by a bracket-13 fastened to the underside of the bed plate A and it has at its lower end a pinion 14 that meshes with and is driven by a segmental rack 15 carried on a swinging arm 16. Said arm is Fast to the upper end of the shaft 10 is a looper-carrying arm 19 which carries the looper 1l,said looper being arranged to turn Patented Mar. 12', 1912 about the exterior of the periphery thereof. The

hold the shuttle support in its proper pos1- tion. The shuttle 40 rests loosely on the stalli tionary shuttle support 9 and is secured in place partly by a hold-down 24 and partly by a'positioning finger 25. The hold-down is shown in Fig. 14 and is in the form of aplate which is fastened at one end to'the bed of the machine, as at 26, and is provided witha point 27 that overlies one edge of the shuttle and with afinger 28 that not only overlies the upper edge of the shuttle but enters the shuttle slightly, as clearly seen i in Fig. 3. The upper edge of the shuttle is provided with a shoulder 29 adjacent the point 27, which shoulder coiiperates with the point 27 to prevent turning movement of the shuttle clockwise in Figs. .9 and 10.

The positioning finger 25 is fastened to the 7 bed of the machine in any suitable way, as

by a screw 30, and it is adapted to cooperate with another shoulder 31 formed on the top ed e of the shuttle as shown in Figs. 4 and ing in the opposite direction.

shoulders 27 and finger 25 prevent the shuttle from turning in either direction and the'holdv 40 down 24 prevents the shuttle from rising and from lateral movement while permitting it to be. readily removed from the support by tipping up the edge of the shuttle opposite the hold-down. The shuttle support 9 is also provided with the lip or flange 32 which assists in positioning the shuttle. The shuttle support 9 is held-from rotary movement by means associated with the hold,- down. As herein shown said shuttle support is provided with the vertical flange 33 having an apertured car '34 extended therefrom and a pin 35' depending from the hold-down enters the aperture in the ear and thus holds the shuttle support from rotation.

In the operation of the device the needle is depressed through the throatplate, as seen in Fig, 1,.and at this time the looper is situated back of the needle, as shown in Fig. 9. As the needle begins its retracting move ment a slight loop or slackness. is formed in the needle thread'3 and the looper is at this time swung forwardly into the position.

shown in Fig. 10 so that the nose thereof will pass in behind the needle and enter the loop 49 of the needle thread. It is underhereby to prevent the shuttle from turn-' 29 and 31, together witlith point stood, of course, that when the needle is in its lowest position the point of the needle stands above the arm 19 so that the looper can swing around the needle without coming in contact therewith. As the needle is retracted the looper continues its forward swinging movement into the dotted lineposition Fig. 10, during which movement it draws on and enlarges the loop 49 of needle thread and carries said loop around the shuttle, as seen in Fig. 4. The shuttle is provided on its side with a loop-opening projection or portion 41 whichis shown as a wedge-shaped portion having the two-converging shoulders or walls 42. As the looper is moved about the shuttle from the full to the dotted line position shown in Fig. 10 or from the position shown in Fig. 4 to the position shown in Fig. 5, the point .43 of the loop-opening portion enters the loop 49 and the two sides of the loop move down over the inclined shoulders 42 and thus said loop-opening projection 41 insures that the loop will be opened properly to receive the shuttle. In fact the upper and lower branches of the loop naturally slide over the top and bottom of the shuttle so that when the loop has been carried around into the position shown in Fig. 11 it is carried entirely over the shuttle. When the looper reaches the position shown in Fig. 11 the usual take-up (not shown) operates tot-ake up the needle thread, during which operation the loop is shed from the looper and the latter begins its backward movement into initial position again. The take-up operates to set the stitch in usual manner, the tension plate 7 supplying therequisite tension to the shuttle thread. As'the needle makes its next descent the take-up gives up thread as usual. in sewing machines of this type for the formation of the next stitch. During the operation of the device the loop passes between the shuttle andthe stationary -shuttle support 9 and also between the shuttle and the hold-down, it being understood that sufficient space is provided between these parts to readily permit the loop to pass over the shuttle. Itv will be seen from the. above that my invention is comparatively simple and comprises few parts and because of this fact the, sewing machine. can be run at a comparatively high speed. i

Having fully described my invention, what I claim as new and desire to secure by Letters Patent ,is:- i 1. In a sewing machine,thecombination with. a looper-carrying shaft, of, a horizontal shuttle support sustained by the shaft,

means for holding said support stationary,

a stationary shuttle resting on; the support and provided with a shoulder on its upper edge, a horizontal finger to engage said shoulder, and prevent the shuttle from turning, a needle, and a looper carried by the shaft and moved thereby in a path exterior to the shuttle and in aplane at right angles to the needle path.

2. In'a sewing machine, the combination with a needle, of a stationary shuttle sup port, a stationary shuttle sustained on said a, support and provided on its upper edge with a shoulder, a looper, means to move the looper about the shuttle in a circular path thereby to carry a loop of needle thread around the shuttle, a hold-down for the shuttle to prevent it from rising and also to hold it from turning in one direction, and a finger engaging the shoulder'of the shuttle and preventing it from turning in the other direction.

3. In a sewing machine, the combination with a stationary shuttle-having two oppositely-disposed shoulders on its upper edge,

of means for supporting the shuttle, a

needle, a looper, means to move the looper in a circular path exteriorly to the shuttle thereby to carry a loop of needle thread threabout, a hold-down to engage the upper edge of the shuttle and coiiperating with one of said shoulders to prevent turning movement of the shuttle 1n one direction, and a finger coiiperating with the other shoulder to prevent'turning movement of the shuttle in the other direction.

4. In a'sewing machine, the combination with a vertically-arranged shaft having an axial recess, a looper sustained by said shaft,

a stationary platform provided with a stud "entering said recess an positioned thereby, a shuttle on the platform and provided with a shoulder, a stationary hold-down to engage the top of the shuttle and prevent it 40 from rising and to engage said shoulder to prevent the shuttle from turnin and a needle, said looper operating to ta lie a loop of needle thread and carry it around the shuttle.

5. In a'sewing machine, the combination with a needle, of a horizontal stationary platform adjacent the path of the needle, a stationary shuttle supported by the platform and provided with a shoulder, a hold- 5 down engaging the top of the shuttle to hold the latter from rising and cooperating with said shoulder to hold said shuttle from turning, and a looper to take a loop of needle thread and carry it around the shuttle.

- 6. In a sewing machine, the combination with a needle, of a stationary platform adjacent the path of'the needle, a stationary shuttle supported by the platform, a stationary hold-down engaging the top of the shuttle to hold the latter in position, a looper to take a loop of needle thread and carry it around the shuttle, said platform having a flange rising therefrom, and means connecting said flange to the hold-down thereby to prevent the platform from turn- 1ng.

7. In a sewing machine, the combination with a needle, of a shaft having an axial recess, a platform having a stud entering said recess and positioned thereby, a stationary shuttle on said platform, aholddown for the shuttle provided with means to prevent said shuttle from turning, and a looper carried by said shaft and adapted to take a loop of needle thread and pass it around the shuttle.

8. In a sewing machine, the combination with a needle, of a shaft having an axial recess, a platform having a stud entering said recess and positioned thereby, a stationary shuttle on said platform, a holddown for the shuttle, said platform having a flange rising therefrom, means connecting said flange to the hold-down thereby to prevent the platform from turning, and a looper carried by said shaft and adapted to take a loop of needle thread and pass it around the shuttle.

9. In a sewing machine, the combination with a stationary shuttle, of a needle, a

looper to take a loop of needle thread and carry it around the shuttle, said shuttle havinga shoulder on its upper edge, and a hold-down provided with a point overlying said upper edge of the shuttle adjacent the shoulder and also provided with a downturned finger to overlie and enter the shuttle.

10. In a sewing machine, the combination with a stationary shuttle, of a needle, a looper to take a loop of needle thread and carry it around the shuttle, and a holddown to engage the top of the shuttle and prevent the latter from rising, said holddown being provided with a down-turned finger to enter the shuttle and prevent lateral movement thereof.

In testimonywhereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN KIEWICZ. Witnesses:

THOMAS J. CARTY, JOHN 0. Burns.