US618687A - klemm - Google Patents

Description

N0. 6l8,687. Patented Jan. 3|, I899. 3. A. KLEEVHE'L @E'Efifififiii SEWIFJE MADHENE.

(Application filed Apr. 1. 18081 2 Sheets$heet 2.

(No Model.)

WITNESSES: w d I INVENTOR O v ATTORNEY pulley 1.

HERMAYX A. ILEMM, OF NE\V YORIQ N.

QVEREDGE SEvViNG iVl/KCPHNE.

srEeIsioA'uoN forming part fifliettsrmtent hic. 316,687, datedfianuary 31,

Application died April Q, 1898, Serial No. 676,324. (No model-l To ail whom it may concern:

Be it known that I, llnnnaxx A. KLEMM, a citizen of the United States of Ameriea, and aresident of New York city, eountyand State of New York, have invented certain new and useful Improvements in Overedge Sewing- Machines, of which the following is a specification.

My invention consists of improvements in apparatus for-actuating the needle and looper, whereby the operations will he performed to better advantage, especially in the matter of timing the looper relatively to the needle, as hereinafter described, reference being made to the accompanying drawings v in Figure 1 is a plan V1819 of my improved overedge sewing-machine with a part in horizontal section. Fig. 2 is a seetii d elevation on-line 2 2 E1 1; I o is a sectional ele vaiion on line 3 of Fig. 1. iii" 4t a side elevation of the rocking arm which the cross-head on which the hjioper-bar 155 carried and by which the lengthwise and lateral motions of the leoper are I)? due ed. Fi 5 is a front elev tion of said rocking harm is a plan view, and Fi of the eresshend. Fl of the crank meehaniwo in arm to ei'feet the he er the erosshead. Fig, side i the cam that e inoveiiienis of the la A repr .n s the 1. in driving: which motion is app die-med. by arrow 1 -shaft to iied in the direction inby a belt working: on the 1' is the needle-bar, men ted isi'henrings 0 above shaft A, to reciprocate horizontally and r-nnsversely to said shaft for carrying the needle by the pendent arm a, extendingibrward of the front side of the ease j, in which most of the working are inelosed. The eeeentrie 9, carried on sh: "t A and working between the horns 7i, atta to the needl har, reeiproeates the need. bar in uniform forwerd-and-haekvrard movements.

i represents the loeper. It ranges trans" versely to the line of the needle and over the needle, being at its heel attached to the end of a pendent bar-j of the euterertremity of the loo} )er-uarrying bar is, on which is adjustahlo forward and backward, held in fixed position by the set-screw Z. Inside of the front plate of the ease the looper liar k is attached to the hanger m, which is pivoted at its upper end to the pin a, carried by the crank-arm o, the hub of which is secured by a pivot-screw p to an arm .5, extending horizontally rearward from a laterallysliding CTOS3-l16fld q, carried on a pair of slidewayrods 6, carried on the branch 2 of the rocking arm it, one above another, said rocking arm being pivoted ate and having a slot w, in which an eccentric a: on shaft A works to swing the cross-head forward and backward in uniform motions. The hanger m, carrying the looper-bar, being thus pivoted to swing reguiarly by the movements of rocking arm '16 to carry the looper forward and hackward ever the feed-1i no of the goods betwnmi ieeddielzs y and 2, also bears against the face of the cam a on shaft A. The contour of said c m is such that it swings the hanger on its i vet-pin n at the same ti me, and thus gives the and-down motion of the looper to first it for taking the needle-loop after the lo has passed through the goods, then rise to grass intelrward over-the edge seam, then fall in preparatory to Withdrawing to cast off one, and then rise again to again pass over da e seam to be again depressed for again taking the needledoop, these upward-anddewnwa rd iil0V6lll6fltS being made at the same time that the loeper is made to traverse the seam by the rocking bar a. The spring I), attached to the lower end oi the hanger m, retracts said hanger against the cam a to swingthe loo 7 r den/n.

The purpose of the eran rm 0, to the pin of Whieh, n, the hanger is pivoted, is to adjnst the looper in its relation to the needle. vertically, whieh is done by loosening the pivot-screw p and duly shifting the arm and then tightening the screw.

For effecting the lateral nioxmsnents of the leopei' the cross-heed from whieh it is suspended by pivot w, is connected hr the mm c; stndpin o, with the slotted rocking arm 1] of the reek-shaft e, carried in the head f oi the arm LL and ranging at right angles to the slidewayst of the cross-head and swinging forward and backward in unison therewith. This roeleshaft c has a crank g, the pin of which, 7i, is connected by a hall-jointwith tho movement of. the latter part of said crossing free end of an eccentric-rod c5, mounted on. the eccentric j; carried on the shaft A, whereby lateral motion is communicated to the cross-head for workin the looper laterally at the same time that cross-head vibrates in the forward-and-backward motions for so actuating the loopcr, and the np-and-down motions of the looperare also produced at the same time through the movements of the hanger m by thecain a and the spring I), as before stated. It-will be seen that by using the slotted rocking arm (2 and the stud-pin of the cross-head working therein for reciprocating the cross-head and so adjusting the slotted arm as to angular relation to the crank-pin the crank-pin is at the point of greatest recession from the axis of the arm when the forward movement of the looper over the needle to catch the loop of thence dle-thread begins. The looper will then have accelerated motion when going forward to enter the needle-loop, which is desirable for promptly and certainly engaging the loop, and the time gained in this quick forward movement will be compensated by the slower and the slower movement in the beginning of the return.

'lhe thread-carrying looper i is arranged adjacent to and above the point of contact of the feed-disks and in position at right angles to the vertical plane of the axes of the feeddisks and the point of contact of the faces of the disks. I

By means of the foregoing-described operating mechanism the looper receives a sextuple motion in connection with the reciproeating needle. I

The geared feeding-disk y is mounted on the upright tubular post a and has a shaft b extending downward through said post and bracket 0 attached by an arm d to the baseplate at e for supporting the same in a fixed position to the lower end of the shaft. A concentric ring f -is attached suitably for the shaft, beingturned by said ring, and the ring is made to turn in a step-by-step motionby a lever 1 having forward-an d-backward movement imparted to it by the lever 7L ,COIll1GCi]- ing-rod i eccentric on the mainshaft A, and the spring is, and a friction-pawl device acting on the inner periphery of said ring, but not shown herein, it being the subject of a claim in the patent granted to me, No. 571,322, to which reference is made for an understand ing of the same. i

The outer ungeared feed-disk z is mounted on the lateral arm 3 of the gooseneck-standard t", which is set upright on the lever a pivoted at o and having the spring 10 pressing said lever downward, and thereby causing the grip ofthe feed-disks on the goods being fed to the machine. In practice a suitable foot-treadle fixed on the fioor and having suitable connection with the end 0: of the lever 11 to lift it by pressure on the treadle will be provided for releasing the grip ol the disks on the goods when desired.

' Suitable tension devices for supplying the thread to the needle and to the looperwill he provided as usual in such machines.

I claim- In an overedge sewing-machine the combination of a driving-shaft, a horizontally-re ciprocating needle-bar able means for actuating said bar by said shaft, a looper-bar and looper relatively'arranged with the needle substantially as described, a hanger-bar for carrying thelooper bar, suspended from a pivotal, support, a

cam and retracting-spring for actuating said hanger to produce the vertical movements of the looper, a laterally-i'eciprocating' cross-' head supporting the hanger-bar pivot and imparting .the lateral movements to the looper,

and needle and suit-- and a forwardly and backwardly swingingrockingarm parting like rocking arm on the driving-shaft and an 'edcentricof the driving-shaft imparting lateral movements tothe cross-head, as hereinbefore set forth.

carrying the cross-head and im-v movements to the'looper, said being actuated by an eccentric Signed by me, at New York, this 30th day of I March, 1898. I i

J IIERMANN A. KLEMM.

\Yitnesses:

J. HOWARD,

A. P. THAYER.

Images