USRE8499E - Improvement in sewing-machines - Google Patents

Description

2 sheets-sheet 1.

L HEERY Sewing-Machine. Np. 8,499.

lmaissuewl Novl.19,1878.r

Xmexm, Lukkmexg, 'bg l 'Wwsesl 2 Sheets-Sheet 2.

L. HEERY. Sewing-Machine.- No. 8,499. Reissued Nov. 19,187.8.

@YW Mmmm 'UNITED STATES PATENT `OEEIcE.

LUKE IIEERY, 0F METHUEN, MASSACHUSETTS.

IMPROVEMENT IN SEWING-MACHINES.

Specrniion forming part oi' Letters Patent No. 94,740, dated September 14, 1869; Reissue No. 8,499, dated November 19, 1878; application lcd4 December 96, H77',

To all whom it 'may concern:

lie it known that I, LUKE IIEERY, formerly ot' Hinsdale, in the county of Berkshire and State of Massachusetts, but now of Methuen,

in the county of Essex and State of Massachusetts, have invented a new and useful Polylinear Sewingl\[achine, of which the following is a specification:

The object of my invention is to complete at one operation several lines of stitching runningl in the same general direction, either in straight. parallel lines, sinuous lines, or a coinbination of straight and sinuous lines, the sinuosities being produced by mechanically changing the position ot' the stitching meehanism in a lateral direction, while the material to be stitched is fed in a direct line to the action of the needles, and the spaces between the several lines being changeable to suit the character of the work.

To effect these objects my invention consists of the mechanism substantially as herein described and claimed.

In the accompanying drawings, which form a part of this specification, and to which reference is herein made, Figure 1 is a side elevation of the 1nachine,'with a portion of the arm removed to exhibit its contained meehanism; Fig. 2, a front elevation ofsame; Fig. 3, an inverted plan view ofthe bed-plate and under work of the machine; Figs. 4, 5, and 6, detached details of several parts; and Figs. 7,

8, 9, and 10, illustrations of a few ofthe diversiticd lines of stitching that can be produced by my machine.

As shown in the drawing, the bed-plate l of the machine has secured to its upper side the usual sewing-machine arm 2, which is provided at its front end with the face-plate or head 3. Within the arm is the driving-shaft 4, to the front end of which is secured a disk, 5, having a wristpin, which engages with a curved slot in the' lever 6, said lever being pivoted to an ear on the arm 2, and arranged to vibrate behind the head 3. This lever, which is shown detached in Fig. 4, has also a straight slot formed in it, which engages with a stud on the primary needle-bar, 7, so that the rotations of the driving-shaft 4 impart a reciprocating motion to the needle-bar. 0n the primary'needle-bar are projecting guides 8, for carrying the supplementary needle-bars, 9, which slide freely in a lateral direction. thereon, and obtain from them an isochronous reciproca-ti n g mot-ion with the primary needlebar.

The driving-shaft has, near its rear end, a crank, 10, which connects by a rod, 11, with the arm 12 of the rock-shaft 13. This rockshaft imparts all the necessary movements to the under work ofthe machine, and is provided with a-n arm, 14, at its front end, in which there are two wrist-pins. The outer wrist-pin, 15, connects, by the rod 16, to the shuttle-carrier 17. Said carrier slides in the shuttle-race 18, and gives mot-ion to the shuttle' 19 in the usual manner. The other wristpn, 20, is connected by a rod, 21, to an arm, 22, of another rock-shaft, 23, which rock-shaft operates the loop-hooks 24, for retaining the loops of the needle-thread for forming a 4 chainstitch.

In order to produce the proper timing of the movement of the loop-hooks, some provision is necessary whereby they will obtain a molnentary rest at each movement of the arm 14. As a simple means for e'eeting this, a slot, 25, is made in the rod 21, so that the wrist-- pin 20 will have suicient lost motion7 in the slot without producing any movement of the loop-hooks as said 'arm moves in either direction.

In order to produce an isoe-hronal movement in lateral directions .of the supplementary needle-bars and their respective loop-hooks, it is necessary that a connection should be m'ade between these parts in such manner that all of their lateral movements will be coincident. To e'ect this purpose a separate connection is formed from each guide 26, in which thesupplementary needle-bar has its vertical movement. To each guide is attached a bar, 27, which extends back to the standard' of the arm,

thence downward beneath the bed-plate, where it is joined to asimilar bar, 28, extending forward until it reaches the loop-'hook corresponding to its needle-bar, at which point it is furnished with ears 29, running up each side of the loop-hook, so as to move it (the loophook) in either direction sidewise without interfering with its vibrations as produced by .the rock-sh aft 23. Said rock-shaft is provided with a spline or feather, 30, fitting into a seat cut in each loop-hook, and by this means a vibratory motion of the hook is secured, with perfect freedom for its lateral movements.

The lateral movements of the stitching mechanism are secured in the following manner: A xed stud or arbor, 31, is secured to the under side of the bed-plate, upon which is placed an :Irun-32, carrying a pawl, 33. This arm is vibrated by au arm, 34, on the rock-shaft 13, to which it is connected by a rod, 35. A cam'- disk, 36, to which is attached the ratchetwheel 37, is placed on the stud 31. in such inauner that the pawl 33 will engage with the teeth of the ratchet-wheel and rotate the canidisk with an intermittent motion. The motion derived from vthe pawl and kratchet-wheel is exactly suited to the character of this work. The cam-disk is provided with projections 38, which may be made of aiiyfanciful form to be reproduced in the liuc of stitching; and it is obvious that the changes that can be produced in the lines of stitching are mainly dependent upon the infinite variety of outlines that may be given to the projections of the cani-disk. A pin, 39, which is attached to the bar 28, bears against the face of the cam-disk, and is held in close contact with it by means of the spring 40, which presses against a lug, 41, on the bar 28. As the cam-disk rotates, tlie'suppleincntary needle-bar and its coactin g parts are moved, by the means described, to follow the configuration ofthe projections of the camdisk. By the use of a separate cam-disk for each supplementary needle-bar, so as to pro-` duce an independent motion for each, a different style may be given to each line of stitchin g, after the manner shown `by the different lines illustrated in Figs. 7, 9, and 10; or, when desired, all the rows of stitching maybe made in straight lilies, as hereinafter described.

The presser-foot mechanism does not differ materially in its construction from similar devices in common use, except in the elongation of the foot-piece 42, to accommodate the increased number of needles, and in providing it with slotted openings to allow for the lateral movements of the needles. Attached to the sliding bar 43 of the presser-foot mechanism is a stud, 44, for carrying the feedingroller 45, for moving the material to be stitched to the action of the needles. This feedingroller is rotated on the stud by the following mechanism: A ratcliet-wlicel, 46, which forms an integral part of the feeding-roller, is ar-l ranged to be operated by the sprii'ig-pawl 47,

attached to an arm, 48, which vibrates pn the stud carrying the feeding-roller. To tlieouteii end of this varm is pivoted a sliding rod, 49, which is held in4 place and guided by a stud, 50, secured toa'bracket on the head of the machine, which passes through a slot in the sliding rod. This rod lies in close proximity to the lever 6, and is operated by it to move the feeding device, said lever, on its downward movement, striking a stationary tappet, 51, on the sliding rod, thereby depressing the arm, and carrying back the spring-pawl to reengage with the teeth of the ratchet-wheel.

0n its upward movement said lever strikes a movable tappet, 52, on` the said sliding rod, and moves the feeding-roller by means of the intervening mechanism. The degree of the movement of the feeding-roller is regulated by adjusting the movable tappctin the slot of the sliding rod, so as to increase or diminish the amount of lost motion of the lever 6 between tlie two tappets.

rlhe take-up for the upper thread of the primary needle consists o'f an eye, 53, attached to the outer end of ,the lever and rendered adjustable bya slotted opening for its attachiiig-screw. A loop, 54, for guiding' the upper thread to the primary needle is attached to the head 3 of the arm, and an eye formed at the upper end of each supplementary needlebar performs the same duty for ythe suppleiiieiitary needles.

All of the needles, 55, are secured to their respective needle-bars in the usual manner, and separate spool-holders 56 and teiision-bnttous 57 are provided for each needle.

A uniform lateral movement of the supplementary stitching mechanism, t-o produce uniformity iii the siiiiiosity of their lines of stitching, as illustrated in Fig. 8, may be prodiieed by clamping together their respective bars 27 and straight parallel rows may be produced by securing each supplementary stitching mechanism by means of a set-screw, 58, havin g a bearing against the bar 28 of each,

by which each of these organizations' is heldin a ixed position, to produce a line of stitching at a given distance from the line prod-need by the primary needle and its coactiiig mecliaiiisin. 'lhc cam mechanism is rendered iiioperative by being disengaged wliile the niachine is used for stitching such straight parallel liiies.

It will readily be seen that by lthe act-ion of the feediiig-rollci, which is iliade long enough to extend over the entire line ot' supplementary needle-bars, the material is fed in a direct line irrespective of any devious eoursethat may be given to the lilies of stitching, and that each separate line ot' stitching is coinpletc in itself, and independent of the thread used for forming any other line.

I elaiii as my inventionl. In a machine for sewing several separate and, distinct lines of stitchingrthe combination,`with the several distinct stitching meehaiiisms, of the mechanism, substantially as descri bed, .foriinpartin g to said stitching mechanisms a lateral movement with respect to the line of the feed, whereby several lines of stitching may be made, ont` or more of which will be sinuous and parallel to, or of variable sinuosity in respect to each other, essentially as specified. l

A2. The combination,"with a primary needlebar working in la fixed position, and one orl more supplementary needle-bars,r e'acli one of which is connected to its respective looping- 3G and spring 40, as and for the purpose specified.

5. The combination of one or more supplementary needle-buts, 9, loopinghooks 24, and

conneating- bars 27 and 28 with the rock-shaft 13, arms 32 and 34, roll 35, pawl 33, ratchetwheel 37, cam-disk 36, and spring 40, all essentially as herein specified.

Y'LUKE HEERY.

Witnesses:

HENRY TONGUE, J AMES W. HEERY.

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