USRE599E - Improvement in sewing-machines - Google Patents

Description

T.' J. w. ROBERTSON.

Sewing Machin.

Reissued Sept. 14, I858.

UNITED STATES J. V; ROBERTSON,

or New YORK, N.

IMPROVEMENT IN SEV VIN G-MACHINES.

Speeil'lcation forming part of Letters Patent No. 12,923. dated May .22, I 55; Reissue No. 599, dated September 14, 1858..

To all, whom it may concern:

Be it known that I, T. J .W. ROBERTSON, of the city, county, and State of New York, have invented a new and useful Improvement in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which.-

Figure 1 is a front view of asewing-machine with my improvement. Fig. 2 is a vertical central section of the same. Fig. 3 is a de tached View of the looping apparatus, showing it in a position diiferent to that shown in Fig. 1.

Similar letters of reference indicate corresponding parts in the several'figures.

This invention consists, first, in so arranging and applying a looping apparatus on the opposite side of the cloth to that on which the needle is operated, for the purpose of completwhere it is capable of use.

The drawings show the application of ,my

invention to a single-thread sewing-machine,

but will serve also to illustrate its application to machines of other kinds above mentioned.

, A is the cloth-table.

a is the needle, which carries the thread and operates in substantially the usual manner.

I) is the 1ooper,which takes theloop of thread formed by the needle.

It will be observed, on examining the drawings, that this looper works in such a'manner as to cross the line of feed, thereby opening the loop for the needle to pass through. It is attached to a lever, c, which works on a pivot, (l, which is secured in the frame or stand B of the machine a short distance below the table A. The lever c has a' spring, h, applied to it in such away as to throw up the looper as high as the under side of the table A, as shown in Fig. 3. It is provided with a slot, z, to re ceive a pin, 0, which is secured to a slider, j, which works in a fixed slide, 9, parallel with the needle. This slider f is provided with a small eye or ring, j, which is directly in line with the needle and is large enough for the point of the needle to pass through withoutinjury, but not large enough for the needle to pass entirely through. During the great part of the descent of the needle the looper is held up by the spring 71. to the position shown in Fig. 3; but shortly before the descent terminates'the needle enters as far as it can through the eye j of the slider f, and when it is allowed to go no farther it drives downthe slider, whose pin e carries down the-lever 0 far enough to throw the point of the looper b to the opposite side of the needle to that on. which it stands when it is raised up to the table. of the looper works close to the needle as it passes it, and when the lever is allowed by the ascent of the needle to be raised by the spring the looper passes into and extends the loop and retains it, as shown in Fig. 3, until the needle passes and carries the thread through it to form the next loop. d

The loop is opened and kept in position for the needle to pass through by running the looper in a diagonal direction to the line of feed. \Vhen the looper is run parallel to the line of feed, the loop is not opened sufficient to insure the needle passing through it with certainty, unless a sideward motion is given to said looper for the purpose of opening the loop. This applies also to those loopers or needles running at, right angles to the line of feed, as they also require a longitudinal motion to take the loop from the needle and a sideward motion to open the loop for the needle 'topass through. By running the looper in a diagonal direction, as in my machine, the looper not only takes the loop from the needle, but also opens the loop for the needle to pass through with one direct motion of the looper. This is. a great advantage over the method of running the looper heretofore used, as it lessens the .wear, friction, and power used for running the looper and requires less mechanism;

In order to prevent the closing of the looper under the sharp side of the hole 75 in the table A, through which the needle works, I provide The point a a fixed rounded piece, Z, for the loop to rest against. This tends to keep it open, and also to prevent it slipping'over the point of the looper.

This machine can be operated by turning the shaft of the machine in either direction; or it can be operated if the shaft is detached from the needle-holder and motion imparted to said holder bythe hand, when all the operations of themachine will go on exactly as before, thereby showing the motion of all the parts is derived from the needle and holder. This will be seen to be a great advantage in sewing-machines, not only enabling the machine to be operated either by the right or left hand, at the convenience of the operator, but it also very much simplifies and cheapens said machine and renders it less liable to get out of I order.

.VVhat I claim as my invcntiomand desire to Y secure by Letters Patent, is

1. So arranging and operating a looper or its equivalent that it shall derive its motion '1. J. \V. ROBERTSON.

W'itnesses: 7

- JAMES Romznrson,

O. S. NEWELL.

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