US44217A - Improvement in sewing-machines - Google Patents

Description

resents an'elevation of connections.

i found, and I do not UNITED STATES Pirrrnwrl OFFICE.-

CHARLES PARHAM, OF PHILADELPHIA, PENNSYLVANIA,

IMPROVEMENT lN SEWING-MACHINES.

Specification forming part of Letters Patent No. 442| 7,

To aliL 'whom it may concer-n.:

Beit known that I, CHARLES PARHAM, of the city and countyot' Philadelphia, and State of Pennsylvania, have invented certain new and useful 4improvements in sewing-machines lfor making the button-hole, blind button-hole, overlap or felling, and the ordinarystitch; and I do hereby declare the following to be a. t'ull, clear, and exact, description of the same, reference being had to the accompanying draw; ings, making a part of this specification, in Which*. l i` Figure 1 represents an elevation of the inachine, taken from one of its sides. Fig. 2 repthe same, taken from the needle or sewing end of the machine. Fig. 3 represents, by a detached or broken view, the shuttle, shuttle-driver, looper, and their Fig. 4 represents detached from vthe -machinethe reciprocating rest upon which the cloth lies, the needle-throat bridge, and the feed-wheel. fl-`ig. 5 represents a vertical central and longitudinal section .taken through the front end of 'the machine; and Fig. G represents the 'form of the stitches madeby the machine.

Similar letters of reference, cur in the several separate iignres,'dendte like parts of the machine in all 'the drawings.

Letters Patent of the United States Vforvimprovements in. sewing-machines, No. 42,502, and dated on the 26th day of April, 1864, were granted to me,in which many of the parts and operations of my present invention may be propose to again describe or fully represent all of those parts and operations, but simply the improvements which I have made on said patented invention and so much ct the machine as will illustrate the locality'and action of theimproved parts.

The nature of my present invention consists, iirst,in a needle-guard attached tothe shuttlecarrier for the purpose of keeping or throwing the needle back in its recess and clear of the shuttle. Theneedleoftemwhen its pointstrikes upon the edge of or upon the seam ot' any niaterial being. sewed, will glance ot or out of its recess, and the-shuttle will then strike or catch nuder it and break or bend it. This guard is `designed to prevent this casualty, and etiectually does so.

Another part of my invention consists in a dated September l, 1884.

where they ocwheel and stationary throat-piece, and thus.

preventing thematerialthatjs being sewed from gettinginto said yspace and jamming. It

-also facilitates the true movementot the cloth' in the lateral direction, as it moves with the plate on which the cloth rests, and with .the feed-,wheel also,.an'd `leaves` nothing for the cloth to hang upon-*that is to-say, nostationlary surface.

Another parto'f my invention consists in the laterallylreciprocating plate to Vrest the materiall that is being sewed upon. This platereciprocates with the feed-wheel, and thus vaids said feed-wheel in cloth.

Another part of my invention consists in the guides or Vgages .on -the reciprocating plates,

for the purpose of defining the distance of the sewing from the edgeof the cloth, whether for the whip or button-hole stitch.

Another part ot' my in vention consists in the application to a sewi-ng-machine of an auxiliary alternating needle-thread ,take-up,77 so that.

when the machine is converted into a button'- llole from the ordinary stitch-machine a takenp may be used thatwill compensate for the additional thread drawn o'from the spool by the loo'perwhich is then used. l ,i

Another part of my invention' consists in certain mechanism-for properly workiu'gan alternating take -lup and adjusting-'it-to the work to be done. 1

-Another part of my invention consists in'a ,springcheck or clamp working in connection with the alternating take-np and-.checking the draw-off from the-spool at every alternate stitch, to make certain the take-up of all or any-superfluous thread.

To enable others skilled in the art to make, apply, 'and use these improvements, I will proceed to describe the saine in connection with the drawings, which illustratethe whole machine, but`conne the description more particularly to the parts no w claimed as new.'

The needle-guard A is shown in place in Fig. 3, wherefB represents the shuttle; C, the shuttle-carrier; D, the race; E, the feed-wheel, and F thelooper worked hy a ratchet-wheel and lever below. The needle-guard A is atguiding and moving the jammed into said space.' A

' a laterally-reciprocating bearing for that part brated in its frame lateral direction.

guide or gage,b,(or two or more, it'.necessary,)

. imparted to them,

tached to the sh'uttlcfcarrier C by meansof a set-screw. so that it may hea-djusted when necessary. It is rounded oft" next-the face of the race, and moves in close proximity should bejust in advance of thepoint of the shuttle, so asto pass the needle in advance of the shuttle. Should the between the feed-wheel andthe' stationary prevent the material upon from getting It moreover makes throat-piece a, and thus that is being worked of the material that vvextends beyond the sewingline, and thus aids in moving and guiding said material. be moved in one direction bythe feedwheeler reciprocating plate H, and in the opposite di-v rection by the recoil of va."spring underneath it, where 'it is out of the way. f

' I is a cloth-gage, made adjustable on the bridge, but moving with it as the bridge moves, Y as in workin gfbntton-holesormkin g the over- H is-the movable or laterally-reciprocating plate to rest' the material upou,'italso serving' as a guide upon it. The feed wheel Eprojects: slightly above this plate, aud,`as the feed-wheel is v'i- K horizontally by means ot' the rod L and other mechanism, as described in my above-mentioned patent, the

plate H is carried with On the plate H there isa for the purpose ot' guiding o r gaging the distance ot' the sewing from the edge in making either the whip or the buttonhole stitch, andthis guide or gage, as well as the gage I on the bridge G, reciprocates laterally with its respective parts when they have that motion y and this lateral motion can bedregulated by changing the throw Ut' the ro When this machine is sewing the ordinaryv stitch an ordinary take-up can be used but .when working button-holes'and the looper F is brought into action,then compensation must be made for taking up the additional thread.

that the looper draws oit' from the spool. For this purpose I have devised what I terman auxiliary alternating needle-thread take-up, It is auxiiiary, because it works in addition to the ordinary take-up. looper, when the looper is in action, what the ordinary take-up does for the needle-thread. It is alternating in its action, because the neeto it, and

needle-from any cansev project from its recess, therounded or inclined portion of this guard forces it ,'Ih'is needle-throat bridge may' to the material lying or resting' it in a corresponding dle makes twov passeswhile the .lo-oper acts but once. This auxiliary take-,up is .quitelimpon tant in'niaking the buttonhole stitch, as I rind and the regular ordinary take-np there is an extra quantity of thread drawn oit' from the 'needle-'spool by the action ot' the. looper equal to thcamountwhich passes around the looper, and, as a consequence, without it aloose loop would occur at every alternate stitch.

The auxiliary alternating'takeup M is operated as follows: It is attached to a roekshaftv,'N, supported in bearings c c on the arm O, and which shaft at its' rear cndhas a slot` ted arm, I, connected with it,

'means of a set-screw, d. drive-wheel S,striking the stud Q, rocks the thus operates the take-up M. ,0n the shaft N thereisasprngcheck or clamp, c, which as said shaft rocks pressesaganst the`spool' on the 'pinf at every alternate stitch for the purpose of clamping or checking the draw-ott' from the spool, except when actually necessary to form the stitch and vto insure the taking up ot' all superuous thread. Y

The' laterally reciprocating motion of the feeding mechanism, Ythe auxiliary take-up, and the looper may be thrown into or out of action Vas the machine is changed from one kind of work to another--namely, the take up, by slipping the stud Q, and its cam up through the. slot of the arm l and fastening it out of the4 inuence of the cam R, the reciprocation of the .feeding mechanism by, running vthe screws ou the rod L forward to throw said rod out of action with' the cam that otherwise would operate it, andthe looper by moving a mechanism that throws it out of action, as in my patent heretofore mentioned.

In Fig. 6, I have shown at g a specimen on an enlarged scale ofV the button-hole stitch made by my machine. This button-hole work may be in the body or en the edge ot' the clot-h., or, as they are technically termed, the blind 4or open button-hole stitch or work. At h, I Vhave shown the overlap, fell, or'whip stitch,

It does for ,the

and at 'i the ordinary straight sewing, all ot' which this machine is capable" of sewing with very slight adjustments ot'v its parts.

Having thus fully described the natpre,iob ject, and purpose of my invcn tion, what'I claim therein as new is-v-` l y l. In combination wit-h theshuttlelcarrier, a needle-guard for forcing the needle back into 'its recess should .it from-auyjcause be forced out therefrom, substantially as described, and for the purpose' set forth. i

2. The movable needlethroat bridge for covering the space between the feed-wheel and stationary needle-throat piece to prevent-thc cloth from getting jammed in said space, and to facilitate the moving and guiding of the cloth, substantially as described.'

3. In combination with a laterally-reciprof that` on every othermovement of the needle through which slot a stud or pin, Q, passes. and is secured byb The. cani It on the shaft N at stated and proper intervals, and p the operation described.

eating feed-wheel, thel laterally-reciprocating plate on which the material rests, so that; the

ot' the looper, substantially as `6. The combinationof the cam, stud, arm,

and rockfshaft for operating the auxiliary take- V up and timing` it. so nsto conform td the motions ot' ille needle, shuttle, and looper, substantially as represented.

7. In combination with the auxiliary allernating take-up, the springcheck or clamp for checking the draw-ott from the spooi at every alternate stitel|,substantially as and for -the purpose described.

CHARLES PARHAM. V Witnesses DAVID BEITLER, L. GRIMM.

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