US12146A - Improvement in sewing-machines - Google Patents

Description

' 2 Sheets-Sheet 1.

D. WARD.

Sewing Machine.

Patented Jan. 2 1855.

' 2 Shets-Sheet-Q. D. T. WARD.

Sewing, Machine.

Patented Jan. 2, 1855.

znvenz'm PATENT OF ICE.

DANIEL T. VVARD, OF NEWVARK, NE JERSEY.

IMPROVEMENT IN SEWING-MACHINES.

Sperification forming part-of Letters Pacnt No. 19,!46, dated January :2, 1855 To all whom it may concern:

Be it known that I, DANIEL T. VARD, of Newark, in the county of Essex and State of New Jersey, have invented, made, and applied to use certain new and useful Improvements in Sewing-Machines; andl do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, referencebeing had (to the anneieddrawings, making part of this spccification,where- 1n Figure 1 is a plan of the machine from the under side of the bed. Fig. 2 isa cross-section through line A A, representing the needle and needle-carrier in elevation. Fig. 3 is a section of the loop-catcher, and Fig. 4 is a cross-section of the looper and slide.

The like marks of reference denote the same parts in all the figures.

My improvements consist in means for drawing out the thread, so as to form a loop as the needle rises to insure the passage of a shuttle through the same, or thelooper in single-thread machines.

a represents any frame or bed-plate of the desired size and shape. bis ashaft'set in suitablejournal boxes or bearings in the bed-plate,

and driven by any competent power. 0 is a cam of the required size and shape to communicate (by a rib or groove in-the face thereof) a vibrating motion to the vertical part of the lever d, which is'set in an arm, B, projecting over the top of the bed-plate, and provided with slides 1 1 at the end to receive the needle carrier 0, to which the horizontal arm of the lever 11 is connected by a link. These parts so described can be of any desired form, size, or character, as usual, so as to communicate to the needle 3 the necessary vertical motion, and therefore need not be further described.

f is the spool, and 2 the thread-guide,as usual, and 4 is a spring-clamp to hold down the goods operated on. p

10 is a cam on the shaft 1), taking an arm, on a slide, 11, and kept toward the shaft 1) by a spring, 12, which slide-has a plate passing through the bed, to which motion is communicated by said cam 1.0 in its rotation, and feeds the cloth; but this feeding motion does not form any part of my invention. Therefore any other means may be used for this purpose.

g is a cam on the main shaft, which by a rib, 5, (or groove, if preferred communicates motion to a slide, h, set in guides 6 6. The cam g and shaft are shown dotted in Fig.- 7, as if removed to show this slide h, 7 being the notch in which the rib 5 operates 8 is a forked end to the slide h, in the faces of which are diagonal rows of bristles facing each other, so that the points of the bristles nearly touch each other. The operation of this part is as follows: The parts are so timed and adjusted that the'slide It comes up as the needle descends. Thereby the point of the needle passes between the rows ofbristles, and, as the needle draws up. again, the bristles. hold onto the thread and draw the same out sidewise as the slide h retires, holding onto the same just sufficiently to form. a good loop for the shuttle, in case of a two-thread machine, or the looperin a single-thread machine, to pass through, and

that with unerring certainty, the bristles releasing the thread when pulled on to allow the needle to operate again, and that'without wear I or any tendency to break the thread. Springs might be used in place of the bristles, but I do I not prefer the same.

It will be evident that if the slide it and fork g were used without the bristles the fork would form a guide in which theloop would be formed by the retraction of the needle, preventing said loop from turning to either side out of the way of the shuttle or looper, and the very re-, traction of said fork to allow the looper or shuttle to pass would pull out said loop even by the friction should the thread be against one of the interior faces of the fork.

\ Z are slides attached to the under side of the bed plate, which carry a sliding carriage, 13, having a point or projection, 14,

which passes through the loop in the thread as the carriage 13 is slid along in the slides l by means of a right-angle lever, m, set on a fulcrum, 16, and receiving motion from a pin, 17, on the slide h, taking a slotted hole in one arm of said lever, and the other arm taking by a similar hole the pin 15 in the carriage 13. This carriage 13 and point 14 have a slot or mortise through them vertically, in which is a lever, 18, on a fulcrum, 0, at the outer end of which is a point, 0, projecting from the under side of said lever, and at the other end a small bent lever, 19, on a fulcrum, 20, is connected, so that one arm of said bent lever is vertical. We will suppose that the point 14 of the looper is passing into the loop, the le- Ver 18 is in the position shown in Fig. 2,with the hook or point 0 retracted within the loweredge of the slot in the point 14, and when said point 14 is sufficiently projected through the loop the upper arm of the lever 19 takes a screw point or projection, 21, on the under side of the bed-plate, and a slight continuation of the motion of the slide or carriage 13 causes the point 0 to be depressed below the lower surface of the point 14, which catches the thread as the slide 13 is withdrawn by the operation of the lever on. The parts 'are so timed that the needle descends just before the point 14 has entirely moved back, catching the loop off the point of the looper bypassing down by the side thereof. At this moment the lever 19 comes incontact with the sliding spring-stop 22, which reverses the said lever 19, raising the point 0, and dropping the loop as the needle passes through the same. This springstop 22 is fitted so that it slides in the bearings Z, and is kept toward the slide 13 by means of a spring, 1), which spring yields as the slide 13 and stop 22 1nove along back together, and in order to regulate the exact position of the stop 22 toward the needle, and by consequence the retraction of'the point 0, so as to drop the loop at the right time, I continue a small screw-rod through the side of the bed-plate, and adjust the amount that the spring 12 is allowed to carry said stop by the nut 23.

I do not claim any particular method of moving the needle; neither do I limit myself to using my improvements with the arrangement of needle and levers to the same here in shown; but

\Vhat I desire to secure by Letters Patent 1s- The sliding fork 8,with or without the bristles 9, to detach the thread from the sides ot" the needle or form a guide to the loop for the passage ofthe looper or shuttle, in the manner and as described and shown.

In testimony whereof I have hereunto set my signature this 27th day of June, 1854.

DANIEL T. \VAR-D. W'itnesses:

LEMUEL XV. SERRELL, THOMAS G. HAROLD.

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