US145823A - Improvement in sewing-machines - Google Patents

Description

T. A. WEBER.

Sewing Machines'.

Patented Dec. 23,1873.

Attorneys.

UNITED STATES PTEN'I FFIG.

T HEODORE A. WEBER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOETO i ALBERT LATHROP RUNYON.

IMPROVEMENT IN SEWING-MACHINES.

Speclication forming part of Letters Patent No. 145,823, dated December 23, 1873; application iiled August 30, 1873.

To all whom t may concern:

Be it known that I, TEEoDoEE A. WEBER, of Philadelphia, in the county of Philadel phia and State of Pennsylvania, have invented verse arrangement, as when these devices have been before used. By this arrangement a much shorter and stii'er needle can be used, and there is less liability of the needle springing away from the looper and missing stitches. The second part of my invention consists in the arrangement of an upper thread take-up to operate in connection with the under bulgedplate take-up heretofore used, all as hereinafter` described.

Figure 1 is a longitudinal sectional elevation; Fig. 2 is a partial section, showing some of the parts in different positions; and Fig. 3 is a partial section on the line y g/ of Fig. 1.

Similar letters of reference indicate corresponding parts.

A represents the needle; B, the spool-carrier for the locking-thread; C, the rotary looper, and D the vibrating loop-spreader. The looper is mounted on a revolving bulged plate, E, which turns on the axis G, so arranged, relatively to the needle, that the looping-hook C takes a very direct downward course after engaging the thread, while the spreader l) is, otl necessity, caused to take a lateral course to carry the thread across the path of the spoolcarrier B, to open the loops wide enough for the spool-,carrier to pass through. These parts are all constructed and relatively arranged the same as represented in the Patent No. 139,067, May 20, 1873, except I now cause the rotating looper to take the loopk rst, whereas in the aforesaid patent the spreader took it iirst, and the looper afterward.

I improve Lathrops machine by enabling a shorter needle to be used. The take-up consists of a bar, b, pivoted at one end to the needle-bar IV at d, and having a long slot, c, in it near the other end, through which astationary rod, f, xed on the stationary presserarm g, passes for a pivot, on which the end h, having the hole for the thread, is caused to swing up quickly at the beginning of the down movement of the needle, and thus hold the loop taut on the bulged plate below while drawing it, whereas before it was loose part of the time. l

To vary the pressure of the presser i, I have a collar, j, on the presser-bar l, above the pressure-spring m, with a screw-stud, a, projecting out through the slot p, and having a clamping-nut, g, to screw up against the head of the presser-arm and bind it fast, to vary the tension of the spring by shifting the collar up or down on the presser-bar, and fastening it whenever needed.

The presser-stock has a plate, r, for holding it up to adjust the Work, by lodging on a rest when the stock is turned to swing the presser around out of the way; but, as it is not always necessary to turn the foot around, I provide the turning-plate t with a pin, a, to swing under plate t, to hold the presser up,

, and to swing back again to let it down. This plate can be operated much easier than the presser, and thus save considerable labor.

When the spool has passed through the loops, and the spreader D begins to go back to release the loops, the bulged plate E enters it, and draws the thread laterally over its swell, so as to keep the necessary tension on the slack given up by the spreader. At the same time the upper take-up begins to rise, the needlearm having previously reached the upper limit of its movement, and begun to descend again, and acts, in conjunction with the bulged plate, .to keep the loops taut. The bulged plate escapes through the loop as fast as it is taken np, and the then the spreader takes said loop from the latter passes off the horn a as it vanishes, looper, substantially as specified.

the horn preventing it from being caught by the needle and the spreader D. tion with the needle-arm W, and in combina- Having thus described my invention, I claim tion with the lower bulged rotating` take-np E as new and desire to secure by Letters Pat- F, substantially as speeied. ent- 1. The arrangement of the rotating` looper, THEODORE ALEX' WEBER needle, and the vibrating spreader, substan- Witnesses: tially as described, so that the rotating` looper LEBBEUS WISNER LATHROP, takes the loop rst and near the plate K, and I WV. W. ABBOTT.

2. The upper take-up b, arranged in connec-`

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