US37931A - Improvement in sewing-machines - Google Patents

Description

W. WEITLING.

Sewing Machine.

No. 37,931. Patent'edrMavrch 17; 1863.

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l'. n/ w'w UNITED STATES PATENT QFFICE.

WILLIAM VEI'ILING ,0F NEW YORK, N. Y.

Spccilication forming part of Let-ters Patent No'. 37,931, dated March 17', 1863.

fo all whom it may concern:

Be it known that I, WiLLIAM WE'ITLING, ot' New York, in the county ot' New York and State ot' New York, have invented a new and uselnl Improvement in Sewing-Machines for Making Button-Holes; and I do hereby declare that the following isa clear, full, and xact description o f the saine, reference being had to the specitication ot' another improvenient in it, bearing originally the same date as this, (December 20,1862,) and to the accompanying drawings, forming part of this specitication,in which- Figure ll represents a perspective view'of my invention. Fig. 2 represents a longitudinal vertical View ot' the same. Figs. 3, 4, and 5 represent different positions of the threads. Figs. 6 and 7 represent plan or top views of the button-hole stitch.

- sewing-machines of a double-thread holder,

which operates,in conjunction with the needle, a thread-carrier, and shuttle, to form the button hole stitching, the double-thread holder crossing its two threads under the needle and vertical thread-carrier, the threads ot' which 1 interloop with the crossed threads, and which are secured by the shuttle-thread passing through the loops of the needle and vertical thread-carrier, the operation resultingin asubstantial button-hole stitch, which may also be applied advantageously to the edging ot' cloth.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

Iuse a sewing mechanism in which the operating-line of the shuttle or of its equivalent traverses the feeding-line, and which mechanism is provided with a thread-carrier consisting of a needle having no piercing-point, as described in my patent dated October 29, 1862. I use a shifting double-thread holder consisting of a pair ot' levers (the thread-holder levers) whose arms e and c2 act as thread-holders, moving'on a common fulcrum, 4:, txed upon the thread-holder plate b so as to cross 'each other alternately in a direction parallel to the plane of that plate, and in such a position as to project with their ends down below ther curve toward the position ofthe needle a and the thread-carrier c.V 'lhe ends of these arms are each provided with an eye for the passage ot a thread. The threadlot' the thread-holder c2,- passing through leaders t u c zo, is supplied from spool g2. That ot' the thread-holder c', passing through leader 7L, is supplied from spool g. Lever f moves on another fnlcrum, 12, tixed also upon the thread-holder plate b. The arms of leverf are connected to the upper arms of the thread-holder levers by means of the rods x y. By connecting theupper end ot' lever f with connecting-rod a and imparting to this rod a reciprocating lnotion a reciprocating r crossing motion is imparted to the two threadholders by the action ot'a beveled gear, m, attached to the main 'shaft ot' the sewing-ma- .chine, acting by crank-pin z on connectingrod n, and being so regulated by the adjusting' of the gear as to e'teet the crossing motion otl the thread-holders at the time when the needle aand the th read-carriercdescend under aud before they ascend over the bed-plate. Threadholder plate b, serving thus as abase to the crossing operation of the th readholder levers c and e2, which traverse the feeding-line, acts also as a lever for imparting to the thus-crossed thread-holders a reciprocal motion along that line and traversing the line of the crossing operation, moving thus alternately from position C to position D and back, as shown by Fig. 1. By this arrangement the crossing thread-holders are alternately held forward Linder the needle a and thread-carrier c, and are withdrawn therefrom at the proper time.

Thread-holder plate b in its quality ot' a lever has its fulcrum in an axis passing through hinge fi' in a direction' parallel to the plane of that plate. Hinge l,isattached to lifting-plate 7c, which plate, supporting the thread-holder plate Z1, moves with it in hinge t2, fastened to the upright part ot' angularsupport-er q. Upon the base part of this supporter lifting-plate k reposes, holding the thread-holder plate in a vertical position, or nearly so, suspended by its hinge t', which position is alternately changed, and that change controlled by the revolution of eccentric r, with whicheccentric the upper part otl thread-holder plate b is conedge of that suspended plate and in a slight nected b y arm s of a sliding ring moving on veccentric r. The motion of this eccentric thus carrier o. Thus when the needle-bar rises the lower part ofthe plate b, acted on by eccentric 4r.inclines forward,and the. thread holders hold their crossed threads forward under the needle a and the thread-carrier c, in a position represented by Fig. 3, until both descend under the bed-plate, when thev lower part of the threadholder plate moves back from the needle a and the thread-carrier c, which then in descending to their lowest point pass to a position, as represented by Fig. 4. They then take up and interloop with their threads the threads of the thread-holders e and e2- on the upper side of the button hole or edge, forming astitch on the upper side of the button hole or edge', as represented by Fig. 6. In ascending again the threads of the' needle. a' and the threadcarrier 0 form loops below the bed plate,

l'through which the shuttle 10 passes, as represented by Fig.5, which loops are thus checked by the thread of the shuttle or its equivalent passing through them, forming thus a stitch ou the lower side ofthe button hole or edge, as represented by Fig. 7. Meanwhile the threadholders while receding from the needle a have crossed each other andl are moved forward again, when the needle a and the thread-carrier c ascend over the bed-plate, and th'e operation begins anew. When thus the buttonhole is stitched thread-holder plate b is lifted up by hand with lifting-plate lc and the fabric shifted to another button-hole opening.

The button-hole guide consists of two short pins, o and o2, passing vertically through the opening ofthe button-hole to the edges ot' the opening in the bed-plate for the passage ot the n eedle and the thread-carrier. These pins may be fixed either in the bridge of the bed-plate or may be fastened to wires to the lower part of the cloth-presser, as shown by Figs. 2, and 9. The position of these pins is in the opening of the button-hole parallel to the edges thereof, so that the needle a and the thread-carrier c are working automaticallybetween these pins, which thus serve as guides to the passage of the round as well as-to the passage of the straight portion of the buttonhole.

The foot of the cloth-presser is provided near its point with au eye or leader, 15, for the passage of a cord. This eye is placed so as to lead the cord in a straight line over, the edge ofthe fabric along the opening of the buttonhole and along the guide-pins standing in that opening, running thus along the button-hole between the needle a and the thread-carrier c, the needle working on one side ot it and the thread-carrier on the other side between the two pins.

The stitch iliade. by this machine may be equally well applied for edging cloth or other fabric, and in that case two needles may be used instead of one needle and vertical threadcarrier. y

Having thus fully described the nature ot' my invention, what I claim herein as new, and desire to secure by Letters Patent, is-

l. A doublethread holder operating in such a manner as to cross'its two threads alternately to the right and to the left, and having a reciprocating motion to and from thc needle or needles ot' a sewing-machine, substantially in the manner and for the purpose herein' described.

2. In combination with a sewing mechanism provided with a thread-carrier operating through the opening of the button-hole, a

double-threadholder operated in such a mannenas to cross its' two threads alternately to the right and lel't, and havingv a reciprocating motion to carry the crossed threads to and under the needle and vertical thread-carriere, substantially in the manner and for the purpose described.

3. A thread-holder consisting of a pair of levers moving on a common fulcrum toward and from the needle or needles, and having also a crossing motion of its arms, whose ends e and e2 are provided each with an eye or threadleader for the passage of thread, as herein described, and for the purpose set forth.

4. The combination of a shifting doublethread holder and a thread-carrier with a sewinglnechanism, substantially as herein de scribed, and for the purpose set forth.

5. Securingthe thread-holder plate b to any gular supporter q by means ot' double hinges t" and i2, so as to raise or lower the doublethread holders e andA e2 at pleasure, substan tially in the manner and for the purpose described.

G. rlhe button-hole guide consisting of the two pins o and o2, whether attached tothe bedplate or tocloth-presser, when the same` are constructed and operated substantially in the manner and for the purpose described.v

- WILLIAM WEITLING,

" Witnesses:

PHILIPP EoKs'rEtN, JoHN Nass.

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