US7369A - Improvement in sewing-machines - Google Patents

Description

o. L. rammoujsV Sewing Machine.

Patented May 14, 1850.

UNITED 'STATES PTENT OFFICE.

o. n. n EYNoLDaoF DOVER, 'NEW HAMPSHIRE.

IMPROVEMENT IN s-EwmMAci-UNES.

Specification formingpart of. Letters- Patent No. 7,369., dated May-14,' 1850.

Y .To all whom, ltn/tay concern,.-

Be it known that I, o, L.Y narrows, of Dover, in the county of Stratford and State of New Hampshire, have invented a new and useful` Improvement in a- Machine `for Sewing i Cloth and other' Fabrics; and Ido declare that:

away. Fig. 3 is a' transverse vertical section. through the line l 2 of Figs. -1 and 2. Fig. 4. isvthe needlewhichtdraws thethread through the cloth. y Fig. 5 is the piercer for perforat.

ing the' cloth.

,Thev corresponding parts in the severalgures are referred to by similar letters.

-My invention consists in a new construction,

combination, and arrangement of the parts of a sewing-machine, whereby the working parts are caused to perform their duties twice during each revolution of 4the main 'shaft or Afirst mover, and thereby form two stitches; also, -in the use of a piercer worked by the same motionas the needle, for` the purpose of perforating the cloth previous to making thestitch;

also, 'in the use of a guide or leader, through' which the thread.l is passed as it' comes from the spool by which it is supplied. This guide has such a motion that each time the needle (which is of the form of the bearded stocking or knitting frame needle) is passed through the cloth the thread is ledover its point so as to be caught and drawn back through the cloth `at the backward motion of the needle; also,

in the manner of holding the cloth to 4be oper- Y ated upon.

To enable others skilled in the art to make and .use my invention, I will proceed to describe its construction and operation.4

A is the bed-plate.

f B'B are standards bolted to the bed-plate, carrying themain shaft C, which .is mounted in suitable bearings, and receives a rotary motion by means of the crank-liandle D ou the flywheel E, or by a band working on the `pulley F. Y e

G is a cainfast on the main shaft C, and performing two distinct oices, each of which it performs twicel during'its' revolution-first, that o f working the needle, "piercer, and thread leader, and, secondly, that of working the cloth-feeder. The pulley Fis loose upon the shaft C, so as to allow of the stoppage or' starting of the machine while being worked by. a band, motion being transmitted by vmeans. of

" an ordinary clutch from the pulley to the Cam G. v Y

H is a xed center, attached to the standard B.. The lever Il works on the center E[and is attached at itsupper end (which is forked) to the boss lof the pulley F, andat 4its lower end, which passes through a slot in the bed=plate, to the end of another lever,-J, under the bedplate,"wor.king on. a center, K5, fast to the `bed;v

plate. This lever .J Ahas at its opposite end a knob or handleattached to a stud passing through a slotiu the bed-plate. By moving this, handle to and fro the pulley F is released from or clutehed'rmly tothe caxnG. a` is the needle, the forni o`f which is the same as that ofthe bearded knitting or stock-- ingfframe needle.` (Seen atFig. 4.)

b isthe piercer, formed -as-seen'atFig. 5. -M is abarrslidin'g in the direction of its length onthe faceof the bed plate, aud working in guides N N, screwedfto the bed-plate. Iheneedle is provided' with .a shank which is fitted into theend of the slidingy bar M, which Ais bored to receive it, 'and"secured by a setscrew, c.- The .piercer is secured by a screw to the Slding bar M" at a-distance from the needle elual to the intended length .of the stitches. It is shorter than the needle,'pso'that it does not pierce the cloth in its ferward mo` tion until `the 'needle hasentered the hole made by the last forward motion of the piercer',- otherwise it might, -in passing. through .the cloth,"

close the last hole made. 4

O is a lever working under the bed-plate on a center, P, fast to the bed-plate. One end of this lever is provided with a fixed stud which passes through a slot in the bed-plate, and carries a friction-roller, Q. The opposite end is formed into an eye, R.

S is a sinall frame, attached to the under side of the sliding bar M, and working through a slot in the bed-plate of the inachine. It carries-a frictioulroller which works in the eye It.

T is a helical spring, attacl1ed by one end to the side of the bed-plate and 'by the other to a stud, U, on tn e lower side of the sliding bar M. This spring vhas a tendency to keep Athe sliding bar, and consequently the needle, in its most backward position on the back side of the cam. v

G isa groove against the bottom of which works the friction-roller Q. The forni of the groove is -shown by dotted lines, and it will be stenthat as fits most prominent parts (marked 1 in Figs. 2 and 3) are in contact with the friction-roller Q, the bar, with the needle and piercer, will be vthrust forward. to their l full extent through the cloth, and as the cani revolves the spring T will draw back the bar, and with it the needle and piercer. When the cam has made one-'quarter of a revolution, one ofV the deepest parts, 2, oi' the groove will be in contact with the friction-roller Q, and the'- bar `lV[, with the needle and piercer, will be -drawn to their most backward position.

d-is a spool revolving easily on a fixed spin` dle fast to the bedplatle.

eis a spring attached at one end tothe bed;

plate, and ,having its other end pressing on the thread as it passes. through the notches in the guide f, for keeping the' proper tension on the' thread, so as to make the stitehes'tight. g is a iixed thread-guide.

V is themovable guide-arm orthread -leader.

I -It 'is'formed of spring-steel, and is firmlyattached at its back end to one of the guides N. Near the center-of its length on its Aunder side is a projection, h, and its front end is bent over the edge of the bed-plate, and is provided with an eye, i, through which the thread passes'. A frictionyroller, j, is mounted in a bearing at! tached to the upper side of the sliding bar M. Upon this roller the guide-arm V rests and is held by a helical spring, k, which is bent over it and secured at both ,ends by screws to the bed-plate. .When the needle is in its back position, the projection 7L is resting on the roller. j, and the. eye is raised; but as the bar M moves forward the 'rbller leaves the projection and the spring k draws down the guide-arm.

W is the board which .carries the cloth.l The cloth is attached 'at its upperedges to hooks formed of theA ends of plates screwed to fthe board, while its lower edge is drawn over pins, also 'xed in the board. The board is grooved on its back side to it the V-shaped edge of a plate screwed to, `the front of the bedplate, and on the loweredge of its back side carries a .toothedrack, X. Into the racka .toothed wheel, Y', is geared. lThis toothed wheel' is mounted on a shaft or spindle,` Z, mounted in -bearings m m.- Screwed to the under side of thebed-plate, at the opposite end of the spindle l, 'is a ratchet-wheel, n.

o is a xed center or bearing.

p and 'q are two levers, working on the com- At the end of the lever q is a' A. click or pawl, s, is .jointed mon cent-er o. friction-rollen' r, to the lever p, and gears into the ratchet-wheel n. As the cam G revolves the projections 3 and 4 come alternately in contact with the it to the ratchetwheel n. y catching the teeth of the ratchet-wheel, to preand the pawl taking into the teeth of the ratchet-wheel causes the spindle l to revolve.

.The toothed wheel Y, movingthe rack forward,

gives the required motion to the cloth-carrier. y s is a spring secured at 011e end under the bed-plate and bearing on the pawl s, keeping vent its being drawn back by the pawl ini its backward motion.

p is a ,helical spring, fast toV a stud in. the

bed-plate, 'for the purpose of bringing back the lever p and pawl s, so as to be ready again for action. The feed may be regulated accord` ing to the length of the stitch required, by the distance which the4 pawl is jointed from the center o;

y is aleverworking under the bed-plate'on a center, z," fast tothe bed-plate, and having at one end a stud, y', passingthrough the plate.

If this stud is pressed down, the opposite end iof the lever will raisethe pawl s from the ratchet-wheel n and allow thel cloth-carriage to be moved by hand in either direction along the front of the machine.

t is a plate 'against which the cloth is held while being pierced and-sewed. u is a small hole, to allow the piercer to passethrough. 'v is another hole, through ,which the needle passes. The plate t is screwed to a carriage, w, which is bolted to the bed-plate. ac is a plate forming part of the carriage w, against which the ycloth is held by the backward stroke of the needle. This plate has holes corresponding to those in the plate t, 'to allow the passage of the needleand piercer.. The r-ed lines denote the thread and the blue lines represent the edges of the cloth.

The operation ofthe machine is as follows:

The cloth is stretched on the carriage w and the threadis brought fromthe spool d through the guides f and g, and is passed through the eye i at the end of the guide-arm V. The end of the thread being held by the operator, the cam G- is caused to revolve till one of the most prominent parts in the groove (marked 1 on the dotted line in Figs. 2 and 3) is in contact with the friction-roller Q on the lever O. The

guide-bar M will be propelled forward to its full extent, and the needle a and piercer b will be pushed through the cloth. The` roller jA 011 the bar M will be removed fromthe proj ection' h on the arm V, and the arm will have descended, and the eye i willl have guided the thread over 'the point or hooky of the needle. As,'the cam proceeds farther in 4its revolutionthe needle will be drawn back through the cloth, carrying the threadin the form ofa loop, the point of the hook or beard of the needle beingclosed or pressed into a groove in thel back part of the needle in its backward passage by passing through the hole lfin the f plate t, for the purpose of preventing thesaid.

point'from catching and tearing thej'cloth.

When it has passed through, it is released and s is another spring,

will spring open. The projection 4 on the outside of the cam G will then act upon the roller 1' on the lever q and give the motion to the cloth-carriage, which will cause the loop in the thread to lie along the back of the cloth;

- The next prominent part 1 of the cam G will come in Contact with the roller Q and again force the needle forward through the hole lformed by the piercer b in its last stroke, and the thread will againbe led over the needle as the eye i descends. As the cam continues revolving the needle will recede, taking the thread again,4 in the form of alop, through the cloth and through the last-formed loop. The projection 3 on-the cam G will then act on the roller i', and the cloth will be ready `for the needle to` pass through again for the next stitch, the piercer at every forward stroke of the bar M making a hole in the cloth',

through which the needle passes at the next forward stroke of the said bar M. The end of y the thread may be left by the operator after one or two stitches are made, as the action of the clothLcarriage'will tighten the thread.

, What I claim as new in my invention and desire to' secure by Letters Patent, is-

1. The adaptation of the bearded needle a, such as is used in knitting or stocking frames,

`in combination with the manner of closing the beard-or hook-thereof previous to drawing it back with the thread, to prevent the poi'nt tearing the cloth, by passing it 'through the `hole 'v in the plate t, in the manner' substantially as herein described; v

2. 'The combination of the spring thread leaderor. guide V, the archedspring k, and the frictionlroller j; for the purpose of leading the thread under the point of the beard of the needle.

O. L'. REYNOLDS.

'VVitnesses:

JOHN H. WHEELER, DANI.. OsBoRNE.

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