US767478A - Buttonhole-sewing machine. - Google Patents

Description

PATENTED AUG. 16, 1904-.

I). H. HAYWOOD.

BUTTONHOLE SEWING MACHINE.

APPLICATION FILED MAR. 7, 1904.

2 SHEBTS-SHEET 1.

N0 MGDEL.

INVENTOR WITNESSES:

w 4 WM ATTORNEYS No. 767,478. PATENTED AUG. 16, 1904.

' D. H. HAYWOOD.

BUTTONHOLE SEWING MACHINE.

APPLICATION FILED MAR. 7, 1904.

N0 MODEL. 2 SHEETS-SHEET 2.

WlTNESSES:

UNITED STATES -Patented August 16, 1904.

PATENT @rrrcgn.

DANIEL HOWARD HAYIVOOD, OF NEIV YORK, N. Y., ASSIGNOR TO THE NATIONAL MACHINE COMPANY, OF MAMARONEGK, NET/V YORK, A COR- PORATION OF NEWV YORK.

BUTTONHOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 767,478, dated August 16, 1904.

Application filed March '7, 1904. Serial No. 196,907. (N model.)

To all whmn it warty concern.-

Be it known that I, DANIEL HOWARD HAY- WOOD, a citizen of the United States of America, and a resident of the city of New York,

borough of Manhattan, county and State of New York, haveinvented certain new and useful Improvements in Buttonhole-Sewing Machines, of which the following is a specification, reference being had to the accompanying I drawings, forming a part thereof.

My invention relates to buttonhole-sewing machines, and particularly to machines for sewing round-end or eyelet buttonholes.

Hy invention consists in certain improved 5 means for controlling lateral movements of the needle-bar for shifting the field of the jogging movement thereof to and between opposite sides of the buttonhole-slit at the time of sewing round the ends thereof.

2 The main object of my invention is to simplify the mechanism for this purpose, while at the same time permitting ready manual adjustment of the amplitude of jogging movements imparted without necessary correspond- 5 ing adjustment of the extent of the shifting movements, and independent manual adjustment for the extent of the shifting movement imparted, without change of the pattern-cam employed and without necessary correspond- 3 ing adjustment of the amplitude of the jogging movements.

I will now proceed to describe a buttonhole-sewing machine embodying my invention, and will then point out the novel features in the claims.

In the drawings, Figure 1 is a view in side elevation of a buttonhole-sewing machine embodying my invention. Fig. 2 is adetail view, in horizontal section. of certain parts, the plane of section being taken substantially upon the line 2 2 of Fig. 1. Fig. 3 is a detail view of a form of pattern-cam employed in stitching round-end buttonholes. Fig. 4: is a diagrammatic view of a round-end buttonhole. Fig. 5 is a detail view of a form of patterncam employed in stitching eyelet-end buttonholes. Fig. 6 is adiagrammatic view of an eyelet-end buttonhole.

The machine illustrated herein comprises in main the Well-known form of buttonhole-sew- 5 ing machine made by The National Machine Company, certain parts thereof being removed and other parts substituted therefor in carrying out my invention. The machine comprises the usual bed 1, overhanging arm 2, and front head 3. A Work-clamp 4 receives and presents the Work for stitching and is reciprocated longitudinally With respect to the buttonhole being stitched2'. a, transversely of the machine itselfby any suitable well -l;nown feed mechanism. In stitching a complete buttonhole with the present machine no lateral movement is imparted to the Work-clamp or work whatsoever, all the movements necessary for shifting the field 5 of the stitching operations laterally being given to the needle.

The stitch-forming mechanism includes a vertically-reciprocating and laterally-vibrating needle-bar 5, such as is commonly em- 7 ployed in machines of this type. The needlebar is mounted to reciprocate vertically in a laterally-vibrating gate, one end, 6, of which appears in Fig. l of the drawings, and a pitman or connecting-rod 7, connected at one end with the said vibratinggate 6, constitutes a movementtransmitting means therefor. Two separate, and distinct classes of lateral movements are transmitted through the movement-transmitting means to the gate, and hence to the needle-bar. These movements may be described, first, as laterally vibrating or jogging movements of the needle necessary for overseaming, as is well known, and, second, a movement for shifting the field of op- 5 eration of the needle in its overseaming movements, so that the operation of overseaming may be shifted from one side of the buttonhole-slit to the other around the ends of the buttonhole-slits. The means for transmitting 9 the laterally vibrating or jogging movements to the needle comprises a vibrating lever 9, mounted upon a rock-shaft 10 and vibrated in the usual manner by means of a cam 11, suitably driven from the main shaft 12 of the machine. The lever 11 has a fixed and unvarying period of vibration. A reciprocating element comprising a sliding plate 13 is mounted between horizontal guides 14 and is connected by means of a link 15 with the vibrating lever 9. Reciprocating movement is transmitted to the reciprocating element by its connection with the vibrating lever 9, and the period of movement of the vibratin lever being constant the amplitude of movement transmitted to the reciprocating element will be uniform. A manual adjustment, however, is provided for increasing or decreasing the amplitude of movement of the reciprocating element, the end of the link 15 being adjustably connected in a slot in the vibrating lever 9, so that it may be adjusted to a position nearer to and farther away from the center of oscillation of the said lever. By adjusting the connection of the link 15 with the lever 9 farther away from the center of oscillation thereof the amplitude of movement imparted to the reciprocating element will beincreased and similarly the amplitude of movement imparted to the reciprocating element will be decreased as the connection of the link 15 is adjusted nearer the center of oscillation of the vibrating lever 9. The reciprocating element includes a stud or support 16 upon which is mounted a bell-crank lever 17. The bellcrank lever has a substantially vertical arm 18 and a substantially horizontal arm 19. The vertical arm 18 is connected to one end of the pitman or connecting-rod 7, and the horizontal arm 19 of said lever is connected to the upper end. of a verticallyarranged connectingrod 20, pivoted at its lower end to a lever 21, fulcrumed to the bed of the machine at 22. The upper end of the rod 20 will of course partake of the lateral movements of the slideplate 13, stud or support 16, and bell-crank lever 17, and such movements will be permitted freely by reason of the pivotal connection between the lower end of the said. rod and the outer end of the lever 17. The bed 1 of the machine is suitably apertured to permit such lateral movements, and it will be understood that while the upper end of the rod 20 will actually travel'in an are described with the axis of the connection between the lower end of the rod 20 and the outer end of the lever 21 as a center the arc is so short and the radius thereof so large that the vertical component of the movement of the upper end of the rod 20 will be so small as to be practically negligible. The lever 21 has a projection 23 thereon, which bears against a cam 52% and acts as a cam-follower therefor. A spring 25 holds the cam and follower up to the face of the cam and maintains the parts in their proper relative positions.

The connection of the pitman or connecting-rod 7 with the arm 18 of the bell-crank lever 17, which bell-crank lever is carried by the reciprocating element 13 16, will cause the movements of reciprocation of the said reciprocating element to be transmitted to the needlebar so that the same will be given the laterally reciprocating or jogging movements required for thc'purpose of producing overseaming-stitchcs in the manner well known. By shifting the position of the bell-crank 17 upon the reciprocating element laterally shift-.

ing movements will be imparted to the needle-bar independentof the laterally vibrating or jogging movements. The pattern-cam 24:, which is driven by any suitable mechanism in a manner well-known in this class of machine, will impart the necessary movements through the lever 21 and connecting-rod 20 to the bellcrank lever 17 in order to give the required shifting movements. A cam, substantially as shown in Fig. 3, will produce a round-end buttonhole. such as is illustrated diagrammatically in Fig. 1, the low portion of the cam representing the stitching on one side of the buttonhole and the high portion stitching on the other side of the buttonhole, while the inclines between them represent stitching around the ends of the buttonhole. A pattern-cam, substantially as is shown in Fig. 5, will produce eyelet-end buttonholes, such as is illustrated diagrammatically in Fig. 6, the low portion of the cam dropping to a still lower plane and the high portion of the cam rising to a still higher plane before reaching the inclines which connect the two portions in order to form the swelled portion around the eyelet end.

In order that the position of the stitching upon opposite sides of the buttonhole with respect to a line passing centrally therewith may be adjusted toward and away from such central line, and that without varying the amplitude of the jogging movements, so that the length of stitches will not be varied, I have provided means for manually adjusting the point of connection of the connecting-rod 20 with the arm 19 of tl'lebell-crank lever 17. Such means for manual adjustment comprises a stud and nut 26 carried by the connectingrod 20 and a slot 27, in which the same is mounted. This slot permits the stud 26 to be moved toward and away from the center of the oscillation of the bellcrank lever 17, whereby the throw of same may be varied at will without change to the cam 2 1 employed. It will be understood, however, that this change in throw in no way affects the amplitude of the jogging movements imparted to the needle, but merely the position of the field for such jogging movements with respect to the central line of the buttonhole, and it will also be clear that by properly locating the slot this adjustment will be equal upon both sides of the buttonhole with respect to the central line thereof.

l/Vhat I. claim is 1. In a buttonhole-sewing machine,the combination with stitch-forming mechanism including a verticallyreciprocating and laterreams ally-vibrating needle-bar, of a reciprocating element, means for reciprocating same to produce the lateral vibrations of said needle-bar, a bell-crank lever pivoted to and carried by said reciprocating element, means connecting one arm of said bell-crank lever with said needle-bar, and means connected with the other arm of said bell-crank lever for controlling pivotal movements thereof to vary the working position of the needle-bar.

2. Ina buttonhole-sewing machine,the combination with stitch-forming mechanism including a vertically reciprocating and laterally-vibrating needle-bar,of a vibrating lever, means for vibrating same to produce the lateral vibrations of said needle-bar, a bell-cranklever support connected to said vibrating lever, a bell-crank pivotally mounted upon said support, a pitman or connecting-rod connecting one arm of said bell-crank lever with the said needle-bar, and means engaging the other arm of said bell-crank lever for varying and determining the position of said bellcrank lever with respect to its support to vary and determine the Working position of the needle-bar.

3. Inabuttonhole-sewingmachine, the combination with stitch-forming mechanism, including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reciprocating same, abellcrank lever having a substantially vertical and a substantially horizontal arm, pivotally supported on and carried by said reciprocating element, means connecting the vertical arm of said bell-crank lever with the said needle-bar, whereby laterally-vibrating movements are transmitted thereto, a connectingrod connected with the horizontal arm of said bell-crank lever, and arranged substantially at right angles thereto and at right angles to theline of reciprocating movement of the said reciprocating element, and means controlling longitudinal movements of said connectingrod whereby the said bell-crank lever is rocked upon its support, substantially as and for the purpose specified.

4. In a buttonhole-machine, the combination with stitch-forming mechanism, including a vertically reciprocating and laterally vibrating needle-bar, of a stud or support 16, means for imparting thereto lateral movements of vibration of a predetermined constant period, a bell-crank lever supported by said stud, said bell-crank lever having a substantially vertical and a substantially horizontal arm, a pitman or connecting-rod 7 connecting the vertical arm of said bell-crank lever with the said needle-bar, whereby the laterally-vibrating movements of said stud or support 16 are imparted to the said needle-bar to produce the said laterally-vibrating movements thereof, a vertically-arranged connecting-rod connected at one end with the horizontal arm of said bell-crank lever, and means pivotally connected with the opposite end of said verticallyarranged connecting-rod controlling longitudinal movements thereof, whereby shifting movements are transmitted to the bell-crank lever while still permitting the above-mentioned laterally-vibrating movements thereof.

5. In abuttonhole-sewing machine, the combination with stitch-forming mechanism including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reciprocating same to produce the lateral vibrations of said needle-bar, means for manually adjusting the amplitude ofreciprocating movements imparted thereto, a bell-crank lever pivoted to and carried by said reciprocating element, means connecting one arm of said bell-crank lever with said needle-bar, and means connected with the other arm of said bell-crank lever for controlling pivotal movements thereof about its pivotal support to vary the working position of the needle-bar.

6. In a buttonhole-sewing machine,the combination With stitch-forming mechanism including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reciprocating same to produce the lateral movements of said needlebar, a bell-crank lever pivoted to and carried by said reciprocating element, means connecting one arm of said bell-crank lever With said needle-bar, means connected with the other arm of said bell-crank lever for controlling pivotal movements thereof to vary the working position of the needle-bar, and means for manually adjusting the limit of said pivotal movements.

7. In a buttonhole-sewing machine,the combination with stitch-forming mechanism including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reciprocating same to produce the lateral vibrations of said needlebar, means for manually adjusting the amplitude of such reciprocating movements, a bellcrank lever pivoted to and carried by said reciprocating element, means connecting one arm of said bell-crank lever With said needlebar, means connected with the other arm of said bell-crank lever for controlling pivotal movements thereof to vary the Working position of the needle-bar, and means for manually adjusting the limit of such pivotal movements.

8. In a buttonhole-sewing machine,the com bination with stitch-forming mechanism including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reciprocating same to produce the lateral vibrations of said needle-bar, means for manually adjusting the amplitude of such reciprocatingmovements, a bell-crank lever pivoted to and carried by said reciprocating element, means connecting one arm of said bell-crank lever with said needle-bar, means connected with the other arm of said bell-crank lever for controlling pivotal movements thereof to vary the working position of said needle-bar, and manually-adjustable means for adjusting the point of connection of said controlling means with said bell-crank lever.

9. In a l uttonhole-sewing machine,the combination with stitch-forming mechanism including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating slide. said slide in its reciprocating movements adapted and arranged to impart the laterallyvibrated movements to said needle-bar, a vibrating lever 9, a link 15 connecting said slide with said lever, a bell-crank lever 17 pivotally mounted upon said slide, a pitman 7 connecting one of the arms 18 of the bell-crank lever with the needle-bar, a vertically-arranged connecting-rod 2O pivotall y connected to the other arm 19 of the bell-crank lever, and means substanti ally as described for longitudinally moving said connecting-rod 20, whereby the bellcrank lever may be rocked upon its pivotal support to vary the working position of the needle-bar.

10. In a buttonholesewing machine, the combination with stitch-forming mechanism including a verticallyreciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reci n ocating same to produce the lateral vibrations of said needlebar, a bell-crank lever pivoted to and carried by said reciprocating element, means connect ing one arm of said bell-crank lever with said needle-bar, and a cam for controlling pivotal movements of said bell-crank lever upon its support to vary the working position of the needle-bar.

including a vertically-reciprocating and laterally-vibrating needle-bar, of a reciprocating element, means for reciprocating same to produce the lateral vibrations of said needlebar, a bell-crank lever pivoted to and carried by said reciprocating element, means connecting one arm of said bell-crank lever with said needle-bar, a connecting-rod connecting With the other arm of said bell-crank lever, and a cam for imparting longitudinal movements to said connecting-rod whereby the bell-crank lever may be rocked upon its pivotal support to vary the working position of the needle-bar.

12. In a buttonhole-sewing machine, the combination with stitch-forming mechanism, including a verticallyreeiprocating and laterally-vibrating needle-bar, of means for laterally vibrating the needle-bar and for shifting the field of such lateral vibratory movements gradually around the end of a buttonhole from one side to the other While the work is held. stationary as to the lateral movements, and without necessarily varying the amplitude of such vibratory movements, said means comprising a vibrating member having a substantially uniform extent of vibration throughout, the path of such vibration being substantially at right angles to the plane of vertical reciprocation of the needle-bar, a bellcrank lever thereon having two arms, one projecting laterally with respect to the vertical plane of movement of the reciprocating needle-bar, and. the other arranged at substantially right angles to the first-said arm, movement-transmitting means connecting the lastsaid arm with the said needle-bar, a connecting-rod connected to the said horizontal arm and arranged substantially at right angles thereto, and means for controlling movements of the connecting-rod to impart pivotal movements to the said bell-crank lever.

DANIEL HOWARD HAYWOOD.

\Vitnesses:

C. F. (JARnINe'roN, CHAS. J. JonNsoN.

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