US856645A

US856645A - Stitch-forming device for sewing-machines.

Info

Publication number: US856645A
Application number: US23650804A
Authority: US
Inventors: Robert L Lyons
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-12-12
Filing date: 1904-12-12
Publication date: 1907-06-11
Anticipated expiration: 1924-06-11

Description

NO. 856,645. PATENTED JUNE 11, 1907. R. L. LYONS. STITCH FORMING DEVICE FOR SEWING MACHINES.

APPLICATION FILED DEO.*12,1904.

3 SHEETS-SHEET l.

No. 856,645. PATBNTED JUNE 11, 1907 R. L. LYONS. STITCH FORMING DEVICE FOR SEWING MACHINES.

APPLIGATION FILED DEO.12,1904.

3 SHEETS--SHEEI 2 24 L A A),

v (Uzi/755555: i ru enlar:

Kitty No. 856,645. PATENTED JUNE 11, 1907. R." L. LYONS.

STITCH FORMING DEVICE FOR SEWING MACHINES.

APPLICATION FILED 1950.12. 1904 3 SHEETS-SHBET 3.

[live/21502: QMJQ L W UNITED STATES PATENT o EIoE.

FROBERT L. LYONS, OF WALTHAM, MASSACHUSETTS.

STITCH-FORMING -DEVlCE FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed December 12,1904. Serial N- 236.508-

'To all whom it may concern:

erence being had to the accompanying drawingls, forming a part of this specification.

his invention relates to improvements in stitch forming devices for single thread sewing machine which are particularly adapted for sewing on buttons.

Themain object of this invention is to so construct a single thread sewing machine for forming groups of stitches by vibrating the work with respect to the path of the needle that the drawing away from the path of the needle of the first of any particular pair of 102p; is: prevented.

' other object of this invention is to so construct a single thread button sewing machine,i which the button and the material to whic it is to be sewed is vibrated to alternately present the holes of the button in the path of the needle, that the loop may be cast off the loo er without danger of cutting the thread,,an d a new loop taken from the needle by the loo er.

Other objects of the invention will appear from the description and claims.

The invention consists in a sewing machine comprising a needle, a looper, means for vibrating the work with res ect to the path of reventing' the distortion or displacement of t e thread loop on the looper,v whereby said loop may be in i position to receive the next succeeding loop,

carried tothe looper by the needle, and may be cast off thereonto.

The invention also consists in such other novelfeatures of construction and'combination of parts as shall hereinafter be more fully described and pointedout in the claims.

Figure 1, represents a side elevation of portions of the improved sewing machine, partially in section. Fig. 2, represents an enlarged bottom plan view of the same. Fig. 3 re resents an end elevationfpartly' in section, 0 the same. Figs. 4, 5 and 6, represent diagrammatic views of the needle, the

looper and the thread positioner, illustrating successive steps in the o eration of these parts inthe sewing of a utton to fabric.

with the needle bar by t Fig. 7, represents a bottom plan view of parts of the bed plate showing the needle hole and the thread positioner approximately in the position it occupies with relation to the needle hole when the thread positioner is holding the loops against lateral movement.

Similar numbers of reference designate corresponding parts throughout.

ln button sewing machines in which the button, and the fabric, is vibrated with respect to the path of the needle, either back and forth, as in sewing a two hole button, or I diagonally for the sewing of a four hole button: whereby the holes of the button are successively positioned in the path of the needle there is a tendency to effect a lateral drag on the loop of thread about the looper to-distort said loop, whereby one side of the loop is brought to a position to be caught and broken by the hook of the looper. Or the loop on the looper may be so drawn to one side that it cannot be cast off by the looper on to the next succeeding loop as this latter is being engaged by the point of the looper. As shown in thedrawings 10 represents the bed plate of a button sewing machine on which is mounted the frame 11. having the head 12 in guides of which the needle bar 13, carrying the needle 14 is free to slide. The needle bar 13 is driven from the shaft 15 which is journaled in bearings of the frame 1 1 and its head 12, and is Ipivotally connected e usual connecting rod 16 pivotally connected with a member on said shaft and with the stud 17 adjustably mounted on the needle bar, whereby the rotation of the shaft 15 effects the reci rocation of the needle bar. The usual

gui e eyes

18 and 19 are secured to the head 12 and serve to guide the thread a to the needle.

On the bed plate 10 is movably mounted the button clamp 20 of any usual construction and adapted to be driven in any well known manner to successively osition the holes in the button in the path 0 the needle.

In the preferred form shown herein, the but plate 10, beneath the needle position, is furnished with the usual needle passage as is shown 111 Figs. 4, 5, 6 and 7.

The main shaft is journaled in bearings of the bed plate 10 and has the cam 26 and the worm 27, this shaft being driven inany usual and well known manner. Adjacent to this main shaft 25 is rotatably mounted the gear 28 the teeth of which are engaged with and driven by the worm 27 to rotate this gear and its cam member 29 the peripherally disposed teeth of which work against the bearing 23 to effect the vibration of the lever 21 against the action of the spring 24 and cause the movement of the button clamp.

Rotatably mounted at the under side of the bed plate are the

bevel gears

30, 31, and 32, motion being imparted to the gear 30 by connections with the main shaft 25 to drive said gears and the shaft of the looper 33, of any ordinary construction, which shaft is journaled in bearings of the bracket 34 depending from the bed plate, and is provided with the gear 35 meshing with the gear 36 on the shaft of the gear 32. The looper being so positioned beneath the needle hole of the bed plate that a loop of thread carried down through said hole, by the needle, may be engaged by the hook end of the looper.

In the under side of the bed plate is formed the guide 37 extending longitudinally of the bed plate at one side of the needle hole as is indlcated in dotted lines in Fig. 2; in this guide is mounted the slide 38 having at its rear end the cam slot 39, extending at an angle with the general extension of the slide, and, in its lower surface a recess 40 having the shoulders 41 and 42, and in this recess is pivotally mounted the arm 43 furnished with the hook end 44. 1 To effect they reci rocation of the slide 38 from the main sha t 25, I provide a lever 45 which is pivotally mounted at the under side of the bed plateand has the

pins

46 and 47, the pin 46 45 eing engaged in the slot of the cam 26 while'the pin 47 works in the slot 39 of the lever 38.

Beneath the bed late and adjacent to the slide 38 are, preferably, adjustably mounted the plates 48 and 49, the plate 48 having the sto pin 50, while the plate 49 is furnished wit the spring buffer 51. As will be seen by reference to Fig. 2 of the drawings the finger 43 is moved back and forth between the pin 50 and the buffer 51 and, if this pin and buffer are suitably adjusted, is intercepted by such parts and caused to swing on its pivot. When said finger strikes the spring buffer 51 it is su 44 past the needle hole and to a position for holding the thread loop against the drag of osed to have em, gaged the loop of threa etween the workthe work and in a position where the hook of the looper will not pass'outside said loop, in

yielding strain may be exerted on the arm 43 which will not break the thread.

It is to be understood that this improvevmentiis particularly designed for use in a single thread sewing machine, and preferably in such a machine in which the button clamp is vibrated to successively. present the holes of the button in the path .of the needle.

Attention is now called to Fig. ,4 of. the drawing in which it will be seen that the needle is on the upward movementafter having assed down through the hole 0 of the button Etc deliver the .loop to the looper 33, if now the button. be moved to the right, in said figure, to bring the hole (2 in the path of the needle, the tendency is to drawthe loop ofthread in the same direction then carrying the side a. of said loop across. the. path in which the hook end of the looper, moves, so that, as the looper rotates to take the loop of thread delivered by the needle through the hole d of the'button the hook end of the looper will pass outside of the side a .of the first loop and will break the same. The slide,

38 is timed to move forward as .soon as the needle has moved upward sufiiciently to clear the arm 43 and the loop of thread is engaged approximately to the position shown inFig.

7, holding the loop of thread approXimately as shown in Figs. 5 and 6 and preventing the dragging of the loop, or its distortion; by the movement of thework. As will be seen by reference to Figs. 5cand 6 the looper may now rotate and take the next succeeding loop, delivered by the needle through the hole (1 of the button, without: breaking; the first. mentioned loop, and this latter loop will then be cast ofi on to said secondloop. After the needle 14 has deliveredthe second loop to the looper 33, throughthej hole (1 of the; button, the needleagain moves upward to a point above the button and the S1i'de.38 is;movejd backward to theposition shown in .Fi 2 of the drawings. Thelbutton ib'beingien illustrationl'anjd description toilimit my infvention to such use for I=a1n-well aware, that the invention is applicable and. usefulin machines for sewing onbuttonsfhaving more than two; holes and in which the movement ofthe button clamp is such: that all. the hdles in the button arepresentedin succession,'in

the path of the needle, as, is wellknown. in

the art. Nor do I-I desire to limit myself to the specific construction of the thread, or

loop, positioner or to the manner in which it i is operated.

It is obvious that one of the important features'of this invention is to so control the thread loop on the looper that. thelooper may cast thesame off on to the next succeeding loop without reference to the position to WhIOh the work, or the button ma have been drawn, and this invention is not 'mited to an particular means for accomplishing this 0 ject.

' Having thus described my invention, I claim as new and desire to secure by Letters Patent. a

1. Ina single thread button sewing machine, the combination with a button clamp mounted for movement to position the holes of the button with respect to the needle, of a needle, needle driving means,a looper, and a movable needle thread positioner adapted to engage the thread between the looper and the work to resist the drawing action 'of the button clamp, in its movement, on the loop.

2. In a single thread button sewing mla-.

chinethe combination with stitch forming mechanism comprising a needle and a looper, of a work holder movably mounted with respect to the path of the needle, and movable means, adapted to engage the thread beneath the work-holder, to resist the lateral movement thereof under the action of the Work holder.

3. In a single thread button sewing machine, the combination with a button clam mounted for movement to position the holes in the button with respect to the needle, of a needle, needle driving means, a looper, a needle thread positioner movably mounted to work beneat-hthe work and having a path of movement across the needle path, and means for actuating said positioner .to move the thread laterally at alternate loop delivery movements of the needle.

In witness whereof I affix my signature in presence of two witnesses.

ROBERT L. LYONS.

Witnesses:

H. J. MILLER, S. GoosTRAY.