US1991627A

US1991627A - Buttonhole sewing machine

Info

Publication number: US1991627A
Application number: US569135A
Authority: US
Inventors: Franklin A Reece
Original assignee: Reece Button Hole Machine Co
Current assignee: Reece Button Hole Machine Co
Priority date: 1931-10-16
Filing date: 1931-10-16
Publication date: 1935-02-19
Anticipated expiration: 1952-02-19
Also published as: GB423491A; FR779174A

Description

Feb. 19, 1935. F. A. REEcE BUTTONHOLE SEWING MACHINE Filed Oct. 16, 1931 2 Sheets-Sheet 1 lnverfior F mnKlin A. Reece byWMaW ATTys Feb. 19, 1935.

F. A, REECE BUTTONHOLE SEWING MACHINE Filed Oct. 16, 1931 2 Sheets-Sheet 2 Figf24.2

' InvenTor. FmnKlin A. Rejece @MMA/M ATys.

Patented Feb. 19; 1 9135 BU'r'roNnoLE sEWiNG mflloHINE Franklin A. Reese, Brookline, Mass., assignor'to The Reeee Button Hole Machine Company,

Boston, Masswa corporation of Maine Application october 16, 1931, serial No. 569,135

14 'claims. (o.`112" 15e)- This invention relates to buttonhole sewing machines and particularly to them'echanism for giving the needle its lateral jogging movement to cause it to penetrate the work alternately at the buttonhole slit and at a distance back from the slit; For convenience the thrusts of theneedle through the goods at thebuttonhole slit will be referred to as slit thrusts While the thrusts' of the needle through the work back from the slit will'be referred to asi'depth thrusts. I

When the sewing of the buttonhole is completed each buttonhole stitch will include a portion of thread extending from a slit thrust to a depth thrust. The length of these portions of thread, which is sometimes referredto as the bight of the buttonhole stitch, is determined by the extent of the lateral jogging movement vwhich the needle has.

In the operation of buttonhole sewing machines it is sometimes desirable to vary the bight of the buttonhole stitch, or, in other words, to vary the amplitude of the joggingmovement of the needle. In some fabries it is important to sew a buttonhole with a Wide bight which .Would be accomplished by giving the needle'an increased amplitude of jogging movement, andfor other purposes it inay be desirable to sew thebuttonhole with a narrow bight, which is accomplished by adjusting the needle-jogging mechanismfso lthat the needle will have a decreasedamplitude of `jogging movement. Moreover, in sewing buttonholes in some fabrios it is desirable that the slit thrusts of the needle for the stitches on both sides of the buttonhole should be in the exactcenter line of the buttonhole while in sewing buttonholes in some other fabrics, suchfor instance as coarsely woven or knitted fabrics,,it is desirable to so adjust the stitch-forming mechanism that the slit' thrust of the needle will be spaced from thecenter line of the buttonhole, inwhich case thel two lines of slit thrusts formed when the two sides of the buttonhole are sewed will be spaced from each other. i

In prior buttonhole sewing machines withwhich I am familiar the means for adjusting the'y amplitude of jogging movement of the needle, or the bight of the stitches, is such that any change in the length of the jogging movement which is made whenthe needle' is set for making its slit thrusts at any point other than the center line of the buttonhole involves also a change in the position of the slit thrusts of the needle and, therefore, in these prior butto'nhole sewing machines if it was desired to change'the bight of the buttonhole stitch when the needle is set to make slit thrustsat one side of the center line of the buttonhole without, however, changing the .position of the slit thrusts ofthe needle it-has been necessary to make two adjustments, that is, first to make the'adjustment to secure the desiredam- 5 plitude of jogging` movement of the needle and then to make a subsequent adjustment in order to center, the stitches and bring the line of slit thrusts back to' the desired or initial position.

One objectof the presentinvention is to provide a novel needle-jogging mechanism Which can be adjusted to vary the amplitude of the jogging movement ,of the needle without, however, changingjthe position of the slit thrusts regardless of the position of the slit thrusts of the needle relative to the center line ofV the buttonhole Vso that if a change in the bight of the stitches is desired without any change in the position of the slit thrusts of the needle a single adjustment is all that is necessary. r i

Another object of the invention is to provide a novel means for adjusting the position of the needle'to enable the slit thrusts to be `madef'at any desired point transversely of the buttonhole slit, which means is independent of the li neans for varying the amplitude of jogging movement of the needle. v v I In my present invention, therefore, thetwo adjustments, one for varying the amplitude of jogging ,movement of the needle and the other for varying the position ofthe slit thrusts of the needle, are independent and each adjustment can be made'without .changing the other adjustment.. Inforder to give'an understanding of the invention I have illustrated in the drawings a selectedembodiment thereof which will now be described after which the novel features will be pointed out in the appended claims. v Fig. lis a side view ofa portion of a buttonhole sewing machine embodying my invention; Fig. 2 is a section on the lin`e 2-2, Fig. 1; Fig. 3 is a section on the line,3--3, Fig. 2'; Fig. 4 is a View taken at right` angles to Fig. 3; ,v f Figs.` 5 and 6 are diagrammatic views showing thefoperation of varyingr the amplitude of jogging i movement of the needle withoutvaryng the position of the'slit thruststhereof. w I v The buttonhole sewing machine ,illustrated in the drawings Vhas the usual work-holding means `1 by which the work 2 in which the buttonhole is to be sevied is clamped tothe bed 3 and also the usual buttonhole cutter 90 by which f the` buttonhole slit is cut. The stitch-forming mechanism. comprises the usual needle 4 operating from above the work 'and suitable under thread ,55k

mechanism situated beneath the work and carried by the usual rotary turret 5.

The needle is mounted in a needle bar 6 which has Vertical reciprocation in the head 7 of a stitch frame 8, the latter being mounted on the bedV 3. The needle bar derives its vertical reciprocation from a cam 9 mounted on a cam shaft 10, said cam having a cam path ll which receives a follower 12 carried on the end of a lever 13 situated within the frame 8 and pivoted thereto to rock about a center 14, the outer end of the lever being suitably connected to the needle bar as shown at 15.

The needle bar also has a backand forth lateral jogging movement so thatithealternate thrusts, or slit thrusts, will be along the line of the buttonhole slit while the other thrusts, or depth thrusts, will be through the fabric at a distance back from the slit. The means for thus giving the needle its joggingmovement are similar in many respects to that usually employed in sewing machines of this type, an exemplification of v which will be found in the Patent No. `1,437,847,

bar is turned in sewing around the end` of the f buttonhole. The axial opening 18 through the gear is larger than the sleeve 16 so as to permit the sleeve to be shifted laterally in said opening thereby to accommodate the necessary lateral jogging movement of the needle..

The sleeve 16 is provided at its lower end with two oppositely-disposed inclined grooves v19 and the gear 17 is provided With two depending ears 20, each of which carries a spring-pressed shoe 21 having a toe portion 22 which occupies one of the grooves 19.

Means are provided for reciprocating the sleeve 16 in a vertical direction, and becausev of the engagement of the stationary toes 22 with the grooves 19 such vertical'r'eciprocation will cause the sleeve and the needle'bar to be movedback and forth laterally thereby to produce the slit thrusts and the depth thrusts.

' The sleeve 16 derives its vertical reciprocation from a cam member 23 mounted on the cam shaft 1'0 and having a cam groove 24 in which is'received a follower 25 on. a lever 26 pivoted at 27 to the frame 8. The operative connections between the lever 26 and the sleeve 16 includes a rocker member 31 which is journalled in the frame 8 and which is provided with two

arms

30 and 32. The arm '30 is connected to the lever 26 through the medium of a fixed-length link 29, the latter being pivoted at one end lto said lever at 54. The 'other arm 32 of the rocker Vmember has a forked portion 33 which embraces the upper end `of the sleeve 16 and is pivotally connected vto trunnions or projections 34 extending from a collar 35 mounted onV the sleeve and in which the Vhave with reference to the center line of the buttonhole depends upon the position' in a vertical direction which the sleeve 16 occupies when the machine comes to rest'at the completion of a buttonhole cycle or, in other words, it depends upon the initial position in a vertical direction .of

the sleeve 16. The machine herein shown' has' suitable means, which will be presently described,

for adjusting the vertical position of the sleeve 16 and thereby adjusting the positioniof the slit f thrusts of the needle.

The cam 2d has a fixed throw and for varying the amplitude of the jogging movement the link 29 is adjustably connected to the arm 30, thisv being the usual practice.

The arm 30 is shown.

and the slot 36 has such a shape that when the machine is at rest with the needle raised, saidv slot will form the are of a circle struck from the pivotal connection 54 as a center., Hence with the parts in this position the pivot point 37 may be adjusted longitudinally of the slot 36 without changing the position of the arm 30.

The shifting of the pivot point 37 toward the U outer end of 'the slot will result in decreasing the amplitude of the jogging movement of the needle or the bight of the stitch 'while vadjustment ofv the pivot pin 37 toward the lower end of the vslot 36 Will increase the amplitude of jogging move-` ment of the needle or the bight of the stitch.

Since this adjustment can be made without changing the position of the arm 30 and conse-f.V

of jogging movement of the needle or the bight of the stitch may be adjusted without producing any change in the position of the slit thrusts,

of the needle, and this is true regardless of the;

position in whichthesit thrusts of the neede 40 are made transversely of the buttonhole. This is illustrated in Figs. 'and 6 wherein 38 indicatesl the buttonhole slit. In Fig. 5 vis illustrated diagrammatically a buttonhole in which the slit thrusts of the needle are in line with the buttonhole slit, such slit thrusts .being indicated at'39. In'lfiig. 6 is 'illustrated diagrammaticallya bute; tonholeinwhich the slit thrusts are situated atf one side of the buttonhole slit, such slit thrusts;`

being indicated at 54.'

Assuminglthat the'sewing machine is adf justed 4for'makin'g'yvde bight stitches withthey a buttonhole with stitches .having a'narrower bight but with theslit thrusts of the needle still in the line of the buttonhole slit, then the piv-v otal connection 37'Will be adjustedftoward the outer end of the slot 36, which will result ,in prof ducingv the narrow bightV stitches indicated. in dotted lines Fig. 5 wherein the depth lthrustsl win be at the points maitama at 52. ..This ad- I justment, however, does not affect 1in any way the position in which the slit thrusts will be made andl they `will still be in the. line of the button*- hole 'slit as indicatedin ldotted lines. Fig. 5,. In` v other words, with the construction 'above ldescribed the change in the amplitude 'of the jogging Amovement of theneedleQwhether such change isan increase lor a decreasejoccurs en-v tirely on one end of said movement,'that is, on theY similarly, if it is assumed that .the'sewing 75'" depth thrust end thereof.

chine is ladjusted for making a wide bight' stitch but .with the slit thrusts of the needle at one side of the buttonhcle slit as shown in full lines Fig; 6 wherein the slit thrusts are indicated at 54 and the. depth thrusts at 55, then the shifting of the connection 37 in theslot 36. to make'the narrow bight stitches shown .in dotted lines Fig. 6 will cause the thrusts of the .needleto be made as shown by dotted lines Fig. 6, that is, the slit thrusts, indicated at 56, will stillbe made in the same position as the slit thrusts 54v of the wider bightstitch' butthe depth thrusts'will ,be made at points indicated at 57 which are. nearer the buttonhcle slit than the depth thrusts 55 for the wide bight stitch. `In otherwords, the adjustment of the link 37 in the slot 36 for changing the bight of the stitch` does not produce any change in the position of the slitv thrusts of the needleand the change in the bight occurs at one end only of the stitch, that is, the depth thrust end. i

The means herein shown for adjusting the position of the needle to vary the position of the slit thrusts thereof relative to the buttonhcle slit comprises an adjustable connection between the rocker 31 and the arm BObymeans of which the relation betweenV the two arnis 30 and'f32 may be varied. i v i The rocker member 31 is provided with the two

cylindrical bearingportions

42, 43 which find bearing'in the two sides Vof the frame 8. The bearing portion 43 extends beyond the frame and the arm 30 is provided with a split hub portion 44 which encircles the projecting bearingportion- 43. The split portion of the hub 44 is provided with a clamping screw 45v by which the hub may be firmly clamped to the bearing portion 43. The bearing portion 43 is provided with a projection 46 through which is threaded anV adjusting screw 47 which is confined between and the ends of which bear against two lugs 48 carried by the arm 30. This screw is provided' with a flat sided head portion 49 by which it may be turned and with a lock nut 56 for locking it in any adjusted position. Theturning of the adjusting screw 47 will serveito turn the rocker member in the arm 30 thereby shiftingthe position of the arm 32 up or down with relation to the arm 30. Such up or down adjusting movement of the arm 32 with relation to the arm 30 will shift the sleeve 16 up or down correspondingly and thereby Vshift the needle laterally. This adjustment, however, does not produce any change in the amplitude4 of jogging `movement of the needle but merely shifts the position of the needle bodily thereby shifting the center line of the stitches. This is illustrated in Figs. and 6. Assuming that the machine is adjusted to sew a buttonhcle with wide bight stitches indicated in full lines Fig. 5 with the slit thrusts of the needle in the line of the buttonhcle slit then by properly adjusting the screw 47 the position of the needle may be shifted so that the slit thrusts will be as indicated at 54 in Fig. 6 wherein they are located at one side of the buttonhole slit but this adjustment doesnot change the amplitude of jogging movement of the needle and, therefore, the machine will continue to sew the wide bight stitch as shown in full lines Fig. 6.

I claim. I

l. In a buttonhcle sewing machine, the combination with a needle bar and a needle carried thereby, of needle-reciprocating mechanism, a sleeve through which the needle bar reciprocates, a rocker member connected to the sleeve for reciprocating it vertically aslvsaid rocker member oscillatesf` said rocker member having an arm, means toA give the sleeve a lateralishifting movement as it` reciprocates,.fcam-actuated means connected to said arm for oscillating the rocker member, and means for adjusting vtherelative angular positions of said arm and the connection of the rocker member to the sleeve.

2. In a buttonhcle sewing machine, the combinationlwith a needle bar and a needle carried thereby, of needle-reciprocatingV mechanism, a'

sleeve through which the needle bar reciprocates, a rocker having two arms, one of which is connected 'toV said sleeve, means connected to the other arin to oscillate the rocker, and means to lgive the sleeve a lateral shifting movement as it sleeve throughwhich the needle bar reciprocates, a lrocker member having two arms, one of which is connected to the sleeve, a cam-actuated lever having a fixed amplitude of oscillation,'a fixed length link pivotally connected at one end to said lever and at the other endl to the other arm of therocker member, the rocking movement of the rocker member shifting the sleeve vertically, means to give the ,sleeve a lateral shifting movement'as it moves vertically thereby to. cause the needle to make slit thrusts and depth thrusts, the arm of the rocker member to which the link is attached having a slot formed on the aro of a circle lstruclf: from the pivotal connection between said lever and link, said link being adjustable in said slot, means to` clamp the link tosaid other arm in any adjusted position and means other'than the link to vary the positions of the slit thrusts with relation to the slit of the buttonhcle.

4. In a buttonhcle sewing machine, the combination with a needle, of needle-reciprocating mechanism, needle-jogging mechanisniby Which the needle is caused to make alternate slit thrusts and depth thrusts,l said needle-jogging mechanismL including a rocker member having two arms and means to vary the relativeangular position of said arms, whereby the position of the depth thrusts and slit thrusts may be changed while maintaining a given amplitude of jogging movement. i v

5. In a buttonhcle sewing machine, the coinbination with a needle, of needle-reciprocating mechanism, needle-jogging mechanism by whch the needle is caused to make alternate slit thrusts and depth thrusts, said needle-jogging mechanism including a rocker member having two arms adjustable relative to each'other to vary the angular relation thereof, whereby the position of the slit thrusts and depth thrusts may be changed while maintaining a given amplitude of jogging movement. j

6. In a buttonhcle sewing machine, the combination with anneedle vbar and a needle carried thereby, of needle-reciprocating mechanism, a sleeve through which the needle bar reciprocates, a rocker member having two arms, one of which is connected to the sleeve, a cam-actuated lever having a fixed amplitude of cscillation, a xedlength link connecting saidulever to the other arm of the rocker member, and means for ad- With respect to each other.

'7-.In a buttonhole sewing machine. the combination with a needle bar and a needlel carried lthereby, of needle-reciprocating' mechanism, a

rocker member, a cam-actuated lever having a fixed amplitude of oscillation,a fixed-length link connecting said lever to said rocker member and by which the rocker member is given a rocking movement, a connection between the rocker memberl and 'the needle bar by which rocking movement of the rocker member shifts the needle bar laterally thereby producing slit thrusts and depth thrusts, and means other than either the fixed-length link or the connection between'the rocker and the needle bar to vary the position of the slit thrusts relative to the slit of the buttonhole.

8. In a buttonhole sewing machine, the combination with a needle bar and a needle carried thereby, of needle-reciprocating mechanism, needle-jogging mechanism including a rocker member, a cam-actuated lever having a fixed amplitude of oscillation, a fixed-length link connecting said lever to the rocker member and connections between said rocker member and said needle bar to cause the needle bar to have a lateral jogging movement as the rocker oscillates thereby to form slit thrusts and depth thrusts,

and means other than either the fixed-length link or the connection between the rocker and the needle bar to vary the position of the slit thrusts relative to the buttonhole slit without changing the amplitude of jogging movement of the needle.

9. In a buttonhole sewing machine, the combination with a needle vbar and a needle carried thereby, of needle-reciprocating mechanism, needle-jogging mechanism including a rocker member, a cam-actuated lever having a. fixed amplitude of oscillation, a fixed-length link connecting said lever to the rocker member and connections between said rocker member and said needle bar to cause the needle Vbar to have a lateral jogging movement as the rocker oscillates thereby 'to-form slit thrusts and depth thrusts, and manually-operable means separate from either the lined-length link or the connection between'the rocker and the needle bar to vary the position vof the slit. thrusts relative to the buttonhole slit without changing the amplitude of jogging movement of the needle.

10. In a buttonhole sewing machine, the combination with a needle,` of tneedle-reciprocating mechanism, needle-jogging mechanism by .which the needle is caused to make alternate slitthrusts and depth thrusts, means to vary the amplitude of the jogging movement of the needle by either increasing or decreasing said amplitude on vthe depth thrust sideonly of said movement.

11. In a buttonhole sewing machine, the'combination with a needle, of needle-reciprocatlng mechanism, needle-jogging mechanism by which the needle is caused to' make alternate slit thrusts and depth thrusts, means to vary the amplltude of the jogging movement of the needle by eitherV increasing or decreasing said amplitude at` one end only of said jogging movement, and a ysep-i arate means to adjust the spacing of the slit thrusts on one side of the buttonhole from those on the other side thereof.

'12. In a buttonhole sewing machine, they combination with a needle, of needle-reciprocating mechanism, needle-jogging mechanism by which the needle is caused to make alternate slit thrusts and depth thrusts, a' single adjusting means independent of any elements that control the amoperative to increase or decrease-to the same extent the space betweenthe buttonhole slit andl the slit thrusts on each side of the buttonhole. 13. In a buttonhole sewing machine, the combination with a needle, of needle-reciprocating mechanism, needle-jogging mechanism by which between the buttonhole slit and the slit thrusts on each side of the buttonhole.

14. A buttonhole sewingmachine having workholding means, a' needle, needle-reciprocatingmechanism, needle-jogging mechanism having means to control the amplitude of jogging move- -plitude of jogging movement of the needle and ment and by which the needle is caused to .make I alternate slit thrusts and depth thrusts, means for giving a relative feeding movement between the work-holding means and the needle, whereby theneedle makes slit thrusts and depth thrusts on first one side and then the other of the buttonhole, and means independent Vof the elements* which control the amplitude of jogging movement L of the needle to vary the space between the slit thrusts on opposite sides of the buttonhole.

FRANKLIN A. REECE