US727053A - Sewing-machine looper. - Google Patents

Description

No. 727,053. PATENTED MAY 5, 1903. D- L. ANTHONY.

SEWING MACHINE LO0PBR.-

APPLICATION FILED APR. 16, 1902-.

N0 MODEL.

1N VEN TOR.

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UNrrEn STATES Patented May 5, 1903.

PATENT OFFIQE,

SEWING-MACHINE- LOOPER.

SPECIFICATION forming part of Letters Patent No. 727,053, dated May 5 1903.

Application filed April 16, 1902. Se ial No; 103 229. (No model.)

T0 aZZ whom it may concern:

Be it known that I, DANIEL LUTHER AN- THONY, a citizen of the United States, residing at Sacramento, in the county of Sacramento and State of California, have invented certain new and useful Improvements in Sewing-Machine Loopers, of which the following is a specification.

My invention relates to improvements in sewing-machine loopers, the object of'my invention being to provide a cheap and simple attachment to a sewing-machine using a double thread, whereby the same is converted to form a loop-stitch of a single thread, the bobbin for the lower thread then not being used.

In the accompanying drawings, Figure 1 is an end view of the lower portion of a sewingmachine, the bobbin and bobbin-case being removed. Fig. 2 is a view from asimilar direction of the end of the needle-bar and needle and the shuttle, the parts being shown in the position in which the point of the shuttle passes through the thread. Fig. 3 is a simi-' lar view showing the parts in the position in which the needle is passed half-way around the shuttle. Fig. 4 is a similar view showing the loop closing around the finger. Fig. 5 is a perspective view of the under side of the throat-plate, showing the spring-arms and finger. Fig. 6 is an enlarged vertical section of Fig. 8, showing the finger trapping the thread to form a loop. Fig. 7 is a similar view show-' ing the finger released to drop the thread. Fig. 8 is a broken view of the throat-plate, showing in dotted lines the spring-arm and finger. Fig. 9 is a perspective view of the feeder, showing the finger resting therein.

Referring to the drawings, 1 represents the bed-plate of the machine, in suitable'guides 2 of which is supported the throat-plate 3, secured to the said bedplate by screws in the screw-holes 4. Through the needle-hole 5 in said throat-plate passes the needle 6, operated Upon the under.

by the usual mechanism. side of said throat-plate is secured a springarm 7, having extending laterally therefrom toward the arm-basea finger 8, bent upwardly, as shown. Said throat plate has formed therein, close to the needle-hole 5, an aperture 9, into which the upwardly-projecting-end of said finger extends and fits snugly when the spring-arm is pressed upward. Said spring-arm is pressed upward at each reciprocation of the needle by means of the feed mechanism, rising and descending therewith. I have herein shown the feed mechanism used in what is known as the White sewing-machine.

through which the thread is then carried by the needle, so as to form a loop-stitch with a single thread. For this purpose when the thread 10 has been carried through the throatplate 3 by the needle and has arrived at the position shown in Fig. 2 the point ll'of the rotary shuttle 12 passes behind the needle 6 and between said needle and the part of the thread already in the cloth and in its revolution carries the thread forward. It thus gradually draws the thread around or in front of the finger 8. During this time the feeder 16is falling, so that the finger is in-its lower position, so that the thread can pass between the point of said finger and the base-plate. When this part of the thread has passed to a proper position in front of said finger, the feeder 16 rises in the usual manner, and thereby raises said finger so that its point enters the aperture 9 in the throat-plate 3, thus completely trapping the thread infront thereof. The thread will now extend downward over the whole diameter of the shuttle, and as the point 11 of the shuttle moves upward the take-up-draws up the thread, diminishing the size of the loop, so that eventually the loop passes around the finger 8, as shown in Fig. 4. one end of the .loop being fastened to the cloth and the other going-upward through the cloth to the needle.

The needle 'now descends through the loop so formed, and the feeder 16 drops, thereby re leasing the loop fromthe finger, and at the same time the point 11 of the shuttle passes between the needle and the thread and the operation is repeated.

In order to raise the spring-arm 7 when desired, said spring-arm passes. downward into the reargroove or recess l t, formed between .the teeth-l3 of the feeder, and-the free end of said arm is also extended, as shown at 15, to pass into the recess let in the front part of the feederl This extension 15 also serves the purpose of preventing the thread from cs- I employ this finger S to form the loop,

caping to the rear of the finger, which it might otherwise do if the arm ended with said finger.

Instead of pressing the spring-arm upward directly by the feeder I prefer to do so by means of an intermediate spring-arm 17, the rear end of which is secured to the under side of the bed-plate, and the front end is bent upward and presses against the under side of the spring-arm 7. This permits of a yielding pressure being applied by the feeder to the spring-arm 7, which prevents any possibility of undue tightness which might be caused by a direct pressure by the feeder upon the spring-arm.

I am aware that many changes in the form and construction of this attachment to produce the above result can be made to conform to different machines or even in the machine to which the invention is shown as applied without departing from the spirit of this invention. I therefore desire it to be understood that such modifications come Within the scope of my invention.

I claim- 1. In a device of the character described, the combination of the needle, the shuttle engaging the thread and drawing it in front of the finger, the springarm and the finger thereon, arranged to spring vertically when released and engaging the under side of a stationary portion of the machine to trap the thread to form a loop, means for operating said needle and shuttle, and means for depressing said arm against the action of its spring, substantially as described.

2. In a device of the character described, the combination of the needle, the shuttle engaging the thread and drawing it in front of the finger, the spring-arm moving vertically under the action of its spring and in its upward movement engaging the under side of a stationary portion of the machine to trap the thread and form a loop, means for operating said needle and shuttle, and means for vertically moving said arm against the action of its spring, substantially as described.

3. In a device of the character described, the combination of a needle, means for reciprocating the same, a shuttle below the bedplate of the machine, a spring-arm attached to a stationary portion of said bed-plate, and having a finger thereon around which the thread is passed by the shuttle, a feeder for feeding the cloth, said feeder being arranged to engage said spring-arm to move said finger to trap the thread by one movement of the feeder to form a loop in the path of the needle and to release the loop so formed in a succeeding movement thereof, substantially as described.

4. In a device of the character described, the combination with the needle and means for reciprocating the same, of a. throat-plate, a shuttle beneath the throat-plate arranged to engage the thread carried therethrough by the needle, a spring-arm having a finger eX- tending therefrom around which the thread is carried by the shuttle in its movement to form a loop in the path of the needle, a feeder and mechanism for operating the same, said feeder being arranged to engage said springarm to press the projection against the under side of the throat-plate to retain theloop, and being also further operated thereby to withdraw said projection to release the loop, substantially as described.

5. In a device of the character described, the combination with the throat-plate, of a spring-arm secured on the under side thereof having a finger ext-ending laterally from said springarm in the direction of the arm-base of the machine, and then upwardly to trap the thread, a needle passing through said throatplate to carry the thread, a shuttle engaging the thread so passed through and cooperating with the finger to deflect the loop, and means for suitably actuating said needle and finger, substantially as described.

6. In a device of the character described, the combination of a throat-plate having a cavity out in its under side, a finger moving upwardly into said cavity to trap the thread, a needle for passing the thread through the throat-plate, a shuttle engaging the thread so passed th rough and cooperating with the finger to deflect the loop, and means for actuating said needle and finger, substantially as described.

. 7. In a device of the character described, the combination of a throat-plate, an arm having a finger extending laterally and upwardly, feed mechanism for the machine, an operative connection whereby said arm is operated by said feed mechanism to press the finger upwardly against the throat-plate, a needle carrying the thread through the throatplate, a shuttle engaging the thread so passed through and cofiperating with the finger to deflect the loop, and suitable means operating said needle and feed mechanism, substantially as described.

8. In a device of the character described, the combination of the needle, the rotary shuttle engaging the thread and drawing it in front of the finger, the vertically-moving finger then trapping the thread to form a loop and means for actuating said needle, shuttle and finger, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

D. L. ANTHONY.

Witnesses:

FRANCES M. WRIGHT, BESSIE GORFINKEL.

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