US12573A - Improvement in sewing-machines - Google Patents

Description

, v 2 Sheets-Shet 1'. V

G. W. S TEDMAN.

I SewingMachine,

N o.-12,573. j 1 Patented March 20, 1855;

V UNITED; STATES t one. w. STEDMAN, on

PATENT O FICE.

VIENNA, NEW JERSEY,

IMPROVEMENT IN SEWING-MACHINES.

Specif cation forming part of Letters Patent No. 12.5 73, dated March 20, 1355 To all whom/it may concern 7 Be it known that -I,- G. W. STEDMAN, of Vienna, in the county of \Varren and State of New Jersey,have invented a new and Im-; proved Sewing-Machine; and I do'hereby declare that the following is a full and exact descriptionthereof, referencebeing had to the accompanying drawings, making part of this: specification- F'gure 1 being a side elevation of 'my improved sewing-machine; Fig. 2, an endeleva- ,tion; Fig. 3, a top view of a portion detached; Fig.4, an elevation of a portion detached,

showing'a-different position ofth e needle and other parts; Fig, 5, atop viewof certain parts detached in ,the same position; Fig. 6, asec- :tion of a portion detached.

' Like, letters designate corresponding part in the several figures.

The naturepf my invention consists first, in feeding the cloth along bymeansof the nee dl acting as a lever against it over a fulcrum, the needle-carrier being driven for the purpose with a 'cra'nk motion or its equivalent, while the length 'of stitch is regulatedby the length of the Slot-in which the needle is allowed to vibrateat the fulcru'nn'secondly, in

forming the stitch, in connection with'w the needle, by means of'a fingerhaving a reciprocat- ,ing inotion nearly at rightangles' to that of' the needle, and-provided with a beak-like extremity for entering between the thread and needle, and with awedgews'haped shoulder on one side,'in. combination witha slightretaining-spring, tor-forming a loop through which the needle passes inv its turn, the whole be ing arranged substantially as hereinafter set forth.

, The 'i'ranreA 'inay beof anydiniensionsior" design for conyenience onto suit the fancy. I make use of a single, thread,.a, forming a' chain-stitch therewith. It is taken from a spool, a,'situated in some convenient-place,

and passes thence through ade'vice-for regu lating its tension. This is simply a standard or-vrod, 5, through which the. thread passes.

'overa shoulderl thereon, A,r ing,;' b, around said standard, isrpressed d'QWIlllPOll its shoulder by tho i 'action ofa .coiled spring, c, and ithusipinches the thread. The force of press-,1

ureisregulated by screwing up or dow n' a nut, 7,, against said coiled spring. By this regu- "the carrier by means of a binding-head, g,

.through which the needle is inserted, and

which is proyidedwitha screw-shank passing. through the carrier, and, being held by a nut, thereby presses the needle into a groove in s'aid carrier. This head bears only at the shoulders uu, "Fig. '6, which press the needle against the carrier itself, 'and not over the hole through which the shank passes. By this device no strain comes upon the needle to breakj" it. The thread ,passes down through eyes in the wrist f'and-binding-head g, and is finally, ut through an eye near the point of the neele in.'the usual manner. The needle moves iii-a slot, t, formed in the cloth-holder N, and

also in a-slot, Z,- in the supporting-plate L, 1 The cloth 8 is inserted beneath said cloth-holder;

which is pressed down upon the'supportingplate by a spring, P, ,of sufiieient strength. to

retain the cloth in place, but to allow i-ttolbe fed forward .by the needle.- This is done in the following manner: The crank .11 revolves ..'i'n the-directioni'ndicated bythe'arrow'in Fig.

2-, where the needle is represented as descending through the cloth. -In this position the needlefi's p essed forward to the left-hand ex I tremity-of t c slot i,'1 ig. 4i, b'ya slight spring, j. I As the crank descends and travels toward the right hand, the needles brought towaul the other 'end of the slot; till j it reaches the right "ei rtremityat t, as seen in Fig, 4, which represents the cloth supporter and holder as. I cut-in the plane jx' ,wyFig. The nas the" crank f scends-and; tends farther i 'O'the' right, said end tof'the slotfacts asafixed fulcrumand compels the lower endofthe'needlwto move toward the "left, and'consequently to "niove'the 'cloth orother. material forwizard; The length ofstitch is regulated byan-eccentric,.k,-(or-.

its equivalent,) by turning which on its' pivot.

- t.he sloti is lengthened or shortened When ing shaft, 0, which has a vibratory motion communicated to it by means of a connectingrod, E, passing from a crank-pin on the driv= ingpulley D to an arm, (i, on its other end. The parts are of course so proportioned and arranged as to give the desired extent of reciprocating motion to the finger M, which is bent into the form of an arc concentric with the axis of its motion, and is secured to its arm I by a binding-head, 0, and nut 1-, as represent ed, or by any other suitable means. It is evident that the finger may have, a rectilinear reciproeatin g motion, instead of a circular mo'- tion, if desired, and that any other convenient device may be adopted to give the motion.- The motion is so timed as to-reeede when the needle is descending, as indicated 'by arrows in Fig. 2, and to advance when the needle is ascending, as indicated in like manner in Fi 4. The end m, whichI denominate the beak is flattened vertically to about half the'thiekness of the rod,-as seen in Figs. 1 and 5, and is pointed so as to enter between the nee? die, by the'side of which it moves in contact, or nearly so, and the thread, as shown in Figs. 4 and 5; hence when the rod or finger advances-it takes the thread and forms a loop therewith. At some distance from theextreinity of said beak a sort of enlargement or shoulder, a, is formed on the needle side of the finger. This shonlder is made wedgeshaped or receding at the top, and rounded so that the needle will be free to pass do w n avhile the finger is receding without coming in con-' tact, and yet reach below the beak before it recedes entirely back therefrom. Tlie l'o1'1u of the shoulder and beak can be bestunderstood by inspecting the drawings. A. slight spring, 1), presses up against the lower side of the finger, touching it under the shoulder a,-

and thence curving downward to'its extrelnitvy It will be observed th e the main of the moments when the loops .are forming, and straightens it again when the stitch is to be closed, v 1-,.

All the parts of the machine are so arranged enabling it to be observed if anything should get out of order.-

secure by Letters Patent, is? v 1.. Feeding the cloth long 'by means of the needle acting as a lever against it, over a fulcrum, t,'the needle-carrier being .driven, for the purpose, with a erankmotion, or its equivalent, substantially as herein set forth.

the needle, regulating the length of stitch by the combined action of -the slot 0, of adjustablc length, and-the slight spring or its equivday of January, v

" O. l. STEDMlAN'.

. GE Witnesses:

J; S. BROWN,

1e tension of the crank H allows the thread" to be slack at the as to be open to the view ,of the operator, thus VVhat I claim as my invention, and desire to 2. In connection with the above'in'otion of alent, for throwing the needle away from the proved sewing-machine signed, by me this 11th

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