US32239A - comfort - Google Patents

Description

s. COMFORT, Jr. SEWING MACHINE.

No. 32,239 Patented May 7, 1861-.

- Witnesses:

$7 @a %M%j4z N RRIs PETER w, PH 0 lrrln.wAsnma spool. T

UITED TATES.

IMPRQVEMEN? 1N saline.

isles.

Specification ormi gart. or Letters ra itciraaaaae. dated ay 7; i 51;

magnoncerm- 1 Be iriz nown that I, $AMUEL obtain-n,

piffhlorrisville', Bucks county, Pennsylvania,

hare inwent'ed certain new and useful Improveinents'in' Sewing-Machines; and. Ldoherehy declare the following to be a full, clear, and

enact description of the same, reference being td the-accompanyin g drawings", andt'o the lettersof reference marked thereon;

My inventionconsists, first,.it a; novel de'; vice forirnpartin g tension to the needle-thread; secondly, in a device for iinparting tension to the shuttle-thread;

Iii cider toenable others to make and use my invention, I will now proceed to describe its construction and operation.-,

-On reference to the accompanying drawings,

which form a. partof this specification, Figure I is aside view 'of a sewing-machine with my. improvements; Fig. 2, an inverted plan view;

an inside face view'oi' theshhttlerae and shuttie; Fig.6 aiplan View of Fig.5; Fig.7, a transverse verticalsection of Figs-5 on the line 1 2; and Figs 8 and 9, enlarged sectional views of the, discoidul shuttle or spool-case, with the Similar letters refer to similar palrts throughout the several-views. j A re'presentsthe base-plate of the machine, afitLB the stationary arm secured 'tothe said.-

plate. I

To a pin, a, on theunder side of the baseplateisjointed the needle-arm G, which passes through lhe'plate and through the lower portion. of the stationary arm B, the upper edge otthe needle-arm forming part of the circuni-" 'ference .of a circle of which the fulcrum-pin a is the center, the under edge of the stationary" 'ar'in' being formed to.coinc de with this circle,

as seen'i'n Fig. 1. l l 4 D ist'he drivingshaft, turning-in projections b and b-\ on the underside of the base A, this shaft heingfurnishedwith a'driving-pulley, 0,1 and a scrolhcam pulley, E, into the groove of which tits a roller hung to a pin onthe end of the short arm d of the needle-arm O. The needie e is bent to'such-a curvia and is secured to the end of the needlearm in such a posit-ton that it shall coincide or ea ly coincide with the under edge of the stationary arm B, which edge, asbefore remarked, isfpart of the circumference oia circle-of which the pin a (the .cente r of vibration of the needle-arm) is the centenasidescribed inthe patent granted to.

me and F. E. Jackson, November 9, 1858.. To the top of the stationary arin B is se'--' cured the inclined. pillar 'F, and in front of the latter is attached a bar,-G, by means ofa set screw, h,'.between the headof which and the bar intervenesa helical spring, as seen in Fig.

4. This bar G is made concave on the inside, so-as to be adapted to the pillar, and has at the top a notch for receivin g the needle-thread,

the latter passing from the spooLthrough an orificein the pillar, and upward h'etw'eeuthe latter and the bar G:

eye'for the passage of the needle-thread. The

upper edge of the short arm of this lever is 1 curvcd ,,and arranged to bear against a spring,

j, secured to the stationary ariri B, to which is into the ueedle-arui,,servesto limit the move- .ment of the said lever. The stationary arm B is furnished with a spring pressure-bar, J, having the usual pad and the lever l for elevating the said bar, and allowing it to fall by the action of the spring'at pleasure. as these devices are commou'to otherfsewiug-machines,and as.

they form no ,part'oi my present im provements,

further allusion to them will be unnecessary.

v The curved needleepassesthrough a guided, situated atjthe outenektrem-ity of the stationary \armB, the slot through which theneed'le passes heingopen in front, so asto prevent the cutting-of the t hread,'-and of a width suificient to allow the needleto p ass freely without pro. ducing inordinate friction. ".Ehe needle-thread, as betbre remarked, passes through an orifice inthe inclined pillar F, and upward between 'the pillar and the spring-liar (hand through a I notch in the .iatter, from whence it passes downward throughian eye, as, on the stationary arm, upward and through the eye of the Tea pin situated near the end and on one side of the needle arm a lever, H,-is-hung loosely, the long arm of the lever having an lever H, and down theextremityof the through the eye of ward through an eye near stationaryarm,and'thence the needle to the fabric;

To the front end of the shaft D is secured the crank-wheel "K, the periphery of which isv eccentric with the will be rendered ap the lever being pro jections, pp, other on the shuttle N, which-is cave shuttle-race P shuttle is partially its circumference, a being ada parenthereinafter; T n of this crank-wheel i to the lower end of the lev brates in the under side shaft, for a purpose which h'e'pin s connected by a'rod, I or M, whiclr vi-L of the base-plateA,

vided with two lips or'p'ro-f bearing one on one side'andthe opposite'side of the 'discoidal loosely confined to the conby the aforesaid lips. The cut away at one portion of s seen in Fig. 8, this portion" pted to and resting onthe ledge q-q,

which forms the are of a circle the'center of .whichis at a'point between the fabric to be operated on and the u the latter being .pr

.race by the projection to,

ppcr edge of the shuttle," evented from'risin'g in the near whichisan open ing for guiding the shuttle-thread, as seen in- Fig. 5. One portio tle-race is hinged a proper position by which the loose portion ofthe depressed and the n of the ledge got the shut t r, andis confined to its a set-screw, s, on turning ledge may be sh u ttle abstracted from the 4 race. A curved groove, t, is formed in the latter for receivingvthe needle, the groove terminating at a Fig. 6, which serves to needle at a point D on and the shuttle.

the upper end of slotted opening, u, guide and steady the ctween the fabric operated The shuttle itself, which will be best observed on reference Figs.8 and 9, is comp casing, Q, with a circ the spool B. This connected togetherby in its proper brating lever edge of ception of the's secured to thecase, the latter at av poin spool-thread passe I between the spri through an eye n the guide-opening through the latter t furnished with a bl as to be readily mo along the spring, t

creased or diminished ac tion occupied by the bloc To a st tionary jcctions on the nod hung the rocking of whichis jointed the latter project The endfiot' the ar opening in the has die, the projecting the usual serrated position in the cas and its projections. the outer case is c s through this orifice, ng and the case, and thence ear the end of the spring to to the enlarged views, osed of an outer shell or ular recess for containing consists a tube, andis retained e hythe vi- The upper ut away for the re-' pring T, one end of which is the opposite end bearingon t beyond the orifice o. The thence near the o the fnbr ock,u', ved be he rig projection-w, and ic. The springls which is so arranged ckward and forward idity otiwhich is in-' Kording to the posispindle, 1 secured to proer side ofthe base-plate, is frame U, to the lower end another frame, V, and from the two arms W and X. In W projects through an eplate-at or 'near'the" neeportion of the arm havingcodes from. t-heframe.

its point on the under "screw the length of th vwill assume the spool. When thiso of two siniple disks it will be observed surface for moving the fab,-

rich The arm X bears upon a cam, 3, on the gshaft D, as best observed on reference to Fig. 5, thiscam serving to elevate thearm, .al'ld c nseq entl to raise the serrated surface onthe-end of the arm W. :The lateral reciprocating motion \:if this surface is imparted by e-c bined a tn of the crank-wheel K and the spring 4, the ed e of'the crank-wheel,

which, as before remarked, is eccentric with the-driving-shaft, hearing; against the frame IV and moving it, with its ar s X and W, outward, while the spring moves 'ch tvh l i .ward-astheprojecting portion'of tr cam menu of. the serrated su regulated by the screw 5, which passes throngs an arm, 6, on the rocking frame, and bears with side of the baseplate 'It will be evident tensionof the needle on between the springthe amount of this fric tion hein g increased or diminished at pleasure by adjusting the set -screw it, accident, the free unwinding ofthe thread Iron], the spool anditsfree passage to the frictionalsurface is interrupted or re operation of the machine, G will be pulled forward late'dat pleasure. The thread is caused by fricti bar G' and the pillar F,

the-top of the bar position illustrated in Fig. 4, in. which case the t'rictio the thread betweentl the top of 'the barwi sitetension "being im the obstruction to i ll beremoved, the requits free passagefrom the. bstruction is removed the spring-bar will recover its former position and press the. thread against the pi|lar,as before. It willbe seen that by the peculiar construction of the spring-bar and pillar and their arrangement inlrespect to the direction of the n is self-adjusting or self-rein respect to the I do not claim y passing the needle-thread or the shutread between a yielding bar or spring and a rigid object, inasmuch as tension has been heretotoreiimparted to threads by such means; but, v

I claim as my invention and desire to secure "by Letters Patent- 1. Imparting tension 'to-theileedle-threa d for producing fthehecessary tension on the same by-means of avcoiled or other suitable spring, f,- a bar, G, or its equivalent, and the pillar I, or other suitable stationary object, fulcrum 'ot' the said bar, the thread the same, that part of the bar acted spring, and the orificein "thepillar fo -guitle on 011 bthe l the pas.

The extent'of them rface of the arm WI that byadjusting this, e stitch may be rogu When, by any" tarded during the V by the thread and n previously imparted to v 1e orifice of, the pillar and parted to the thread by 1 when the set 3 sage of the thread areso situated in respect to interruption of the free passage of the thread each other andz'to the direction taken by the thread itself that any retarding of the latter or i nterruption of i tsprogress toward the fric tio'tai surface will remove the friction ca used bythe bar, as herein set forth.

2.1The combination of the spring T vith'the discoidal shuttle, when the said spring is so situated in respect to the orifieev and in respect to the direction of the thread from the shuttle-sgoqlwtothe fabric thatany retarding from the spool wiil be theceuse of'removing the friction on the thread between the sprin g and case, as before specified.

' In testimony whereof I have signed my name to this specification in; t

I hepreseuce of two subscribing witnesses S Witnesses:

HENRY HoWsoN,

CHARLES D. FREEMAN.

AML; COMFORT, JR. 7 v

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