US12074A - Improvement in sewing-machines - Google Patents

Description

* carries the locking-thread. Fig 4 is UNITED STATES PATENT-Y 0FFICE'.

v IMPROVEMENT IN S EW ING-MACI--UNES Specification forni i'ng part of Letters Patent No. 12,074, dated December 12,1854.

Be it known that I, G1sonen W. STEDMAN, ot ;Yie'nna', inthe county of Varren and State :ofi'.l\ew- Jersey, have invented certain i1e'wand useful "I1npro veinents' in Machinery for Sew;

ing Cloth; and I do hereby declare that the ;i'ollowing is a; full, clear, and exact description of.the same, reference being'had to the accompanying drawings, forming part vof-th is specification, in which* Figure 1 is a longitudinal vertical section of a sewing-m'achinewith my improvements. Fig. 2 isan inverted pla'n o tl 1 e same. Fig.3 is a front view of. the needle and tube which 7 a;- side view of the needle-arm," showing the method in which the needle -operates for; th e purpose of feeding the,cloth.- Fig. 5 is aside view of a modified arrangement, of the needle. Similar letters of reference j i ndicate corresponding parts in the several figures.

This invention consists i i1a certain new and simple device employed in combination with; a nee'dletoeifect the interlacing oft wo threads, one ofv which is.protrude.d through the cloth by a needle in the same manner asin most of the sewing-machines now "in use, v and theother of which passes through the said; loop and forms another loop, through which the needle. and 1the first thread pass, thus forming. a

- 'do'nble'- series of interlacing loops on one side A i-s}'the bed-plate .01- table, to which all the t parts of the machine are attached. B is a plate secured- -at its back part to the table A by a screw-bolt. a, which serves asa pivot, upon which it isn1ovablewhen desired.

This plate B receives upon the clothor ma= terial to be sewed. It contains the slot 1), through which the needle works, and has attaehed to it-the gage (f,which guides the cloth),

D is the llO 0( ll(-tll'li1,' which is attached to -a s n 1all l 'O(3k-Slllft,'1), working in bearings upon the bed-plate, and which receives the usual motion to carry the needle 0' through the cloth or other inaterial laid upon the plate B from an cccentric, F, on the main shaft G, connected with it at the opposite extremity to where the needle 0 is attached.

. It is the spool which supplies the needle with thread. v v I I is a springpresser, which confines the cloth to the plate 13 during the se\\'i1 1g-.

3 is a short tube, which is open'fron1 end to end, and arranged to work under the plate B, close to the needle and opposite to one side of the 'eye thereof, in a similar manner to the Shuttle com nionly employed. This tube works in a guide, (I, under the plate B, and is conii art of the needle-arm below the rock-shaft B, so that it will work back and forth as the needle works up and down, always retreating from the needle as the,lzitter enters the cloth,

at the front endv (see Fig. 2) as to throw its (which thread is shown in blue color) left by the needle on the under side of the cloth. This tube has a thread, which for the sake of distinotion,l'will call the tubethread, Z (shown in red color,) passing thr'o1igh'it fro'n1 a spool,

the back and leaving it at the front end. This thread before it enters the tube passes through produeed upon it by. a plug,f, of leather or other material. 1Everly"time'the needle passes th1.'ougl1..t-1 1e cloth and leaves a loop, the tube enters it during-the retraction of the needle, ,and the thread protruding from the point of h is i1eatfto the needle. 7 By the time the has advanced as far. as it is allowed, the

' neeill' distance from the cloth, has drawn its loop tube-thread lying by the side of the tube, and

which has been protruded through the loop on the needle-thread is caused to form a-loop, into the retraction of the tube; As the tube is reheedlc-thread and draws it tight around the,

'1'1eted arod K, at its rear end with that and advancing toward it when it is being re tr aoted fromthe clot-h. This tube is so formed point toward the needle, so that it may not fail to .pass' through the loop in the needle-thread L, placed 'on anupright piv,ot, e, entering it at a hole in the guide piece ,'I, inwhich friction is the tribe '1ie's along that side of the tube 0,, having been retracted to its tight around the tube and that part of the 'as the tube recedes that portion of its thread which the needle enters as it makes its next descent-through the cloth simultaneously with tracted, it leaves its own loop in the loop-of the needle, so that when the needle is withdrawn from the cloth the new loop in the needleiii-st ascent of the needle after leaving the loop, }d0es not receive its 'finaltightening till the succeeding ascent of the needle. It will; he understood by the foregoing description that i he tube-thread is left in the form of aloop through a loop in the needle-thread, and then receives a loop of the needle-thread, and there-' fore the action of the needle and tube differs entirely from the action of the needle. and" shuttle, which the tube appearsto resemble. In Figs. 1, 2, and of the drawings the tube I is supposed to be just withdrawn from. the

loop of the needle;th1ead and the-needle-t o be just entering the loop in the'tub e-thread. 4 The above operation can be effected with a needle attached to the arm in the usual way,

and is entirely independent of the attachment and operation of the needl.to feed the cloth,

* which I am about to describe, and'is particularly illustrated in liig.4, though-al so shown in Figs. 1 and 3. l5 in .those figures ;repre- -sen,ts a roller or short rbc1'r-shaft'fittedwith journals to transverse bearings in the end ofthe ncedle-arni I). This roller carries the ne'edle c, which is inserted through it and secured I transversely to its axis',*and it carriesalso-a stud or screw, g, which is to be connected by a spring, h, of india-rubber or other elastic substance, with a screw,-, screwed into the arm,

' or with" some-part of the a'rm, in such away as to throw the stud g against the front of the screw 43,- or some fixed part of the arfn, to hold 1 the needle in a position tangential or otherwise oblique to an arc deseribedfroin the pivot l l.

connection with the arm. The j point or any part of the length of the needle while fixed relatively to thearn1 describes an are from the center E, as indicated by the dotted, are in Fig. 4; but the point describes a larger are thanfany other part. Consequently as the needle moves through the cloth the cloth. is drawn toward the center E to the extent indicated by the change of position of the part in contact The force applied to the needle to driveit through the cloth tends to push the stud g hard up against the screw '1: or other stop provided for the purpose, and thus inake a rigid with thecloth in black and red outline. The

, strength of the spring It must be insufiicient to overcome the friction of the presser I, or its equivalent, upon the cloth, and then," as the needle is being withdrawn from the cloth, the

roller F,will move in its bearings to allow every part of the needle to move in the same are, and thus prevent; the-cloth being moved back; but as soon as v the needle leaves the cloth the spring will throw it to the tangential or Oblique position first described. The length of the movement of the cloth may be varied to alter the length of' stitch by means of the screw 'i, by which it is brought nearer to or farther- The feed may be given in any. direction by placing the needle obliquely in that direction to, the path in which it moves, whether it be attached to an arm or to a straight from the are.

bar moving in a right line. The modification of this arr; nger'neut of the needle in Fig; 5 con- -.'.sists in securing it in a small stock, j, which is pivoted by a screw or pin, 7;, to the arm D, and has a spring, h, applied abo"e the pivot to drive it backagainst the screw -i-.

The proper lateral adjustment of the tube J and the slot b of the table is effected by simply unscrewing; the belt a, and moving the plate B to the right or left, as necessary. The

distance between the guide (I and the rear end of the rod K is so great, compared to the dis v tanee between the guide and the point of the tube, that the relation between the tube and slot in the plate is not p'erceptibly influenced hat I claim as my invention, and desire t o secure by Letters Patent, is

The tube 3'', receivingthread and acting, In

combination with-the needle, substantially as desc'ri bed,jso that each forms a series of loops,

'each. of:whi'clr loops receives one and is re.-

ceived by the uextone of the other series, as

WVit1iesses:

, A. G. Hown1.t, U. H. Hownn-n,

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