US299118A - bowling- - Google Patents

Description

(ModeL) 6 Sheets-Sheet 1.

J. BOWLING 8v J. GONNOLLY.

BUTTON HOLE SEWING MACHINE.

No. 299,118. Patented May 27, 1834.

6 l Y um Om NG NA OM OG N ...1 JW uws Gm 0 ma LN W0 T 0m DB J Patented May 27, 1884.

(Mqdel.) 6 Sheets-Sheet 3.

J. DQWLING 8E J1 001111011111u BUTTON HOLE SEWING MACHINE. No. 299,118. Patented May 27, 1884.

WITNESS 8 lVVE/VTOH kfm gli@ A Homey (Model.) 6 Sheets-Sheet 4.

J. BOWLING 8v J. CONNOLLY.

1 BUTTON HOLE SBWINGMAGHINE.

No. 299,118. Patented Mey 27, 1884.

12e-wu om 6 Sheets-Sheet 5.

(Mdel.)

Am OO O0 1l 7, 2 Y n@ Y.M LEd LWB GEM N06 NAt OMM G GN l JW oww Gm.. NO I H LN WO T om DB J OO 1|. 1|- 9, 9 2 O. N

(Model.) i 6 Sheets-Sheet 6.

J. BOWLING 1n J. GONNOLLY.

BUTTON HOLE SEWING MACHINE. No. 299,118. Patented May 27, 1884.

Darren drains Farrar Ormea.

JAMES DOWLING AND JOI-IN CONNOLLY, OF LONDON, ENGLAND.

BUTTON-HOLE SEWING-MACHINE SPECIFICATION forming part of Letters Patent No. 299,118, dated May 27, 1884. Application filed July 27,1881. (Model.) Patented in France November 10, 1882,.No. l5:2,l74.

.To all whom it may concern:

Be it known that we, .Lines DowLrNe and JOHN CoNNoLLY, subjects of Her Majesty the Queen of Great Britain, both residing at London, England, have invented certain new and and to theletters or figures of reference marked thercon,which form a part of this specification.

This invention relates to machines for sewing button-holes. Its chief obj ect is to provide such machines with convenient, cheap, and reliable automatic feeding mechanism to obviate the inconvenience of turning, moving, and guiding the fabric by hand while the buttonholes are in process of being sewed. This we accomplish by the peculiar' construction and combination of parts hereinafter described.

In the accompanying drawings, Figure l represents a plan view of our improved buttonhole sewing-machine. Fig. 2 represents a front elevation of the same. Fig. 3 represents a rear elevation of the same. Fig. I represents a bottom view of the same. ffl Figo represents a detail view ofthe cam, degat/heel, and proximate devices which rotate, step by step, the shaft whereby the longitudinal feed is effected, and of the screw which regulates the length of the button-holes. Fig. 6 represents a transverse vertical section through the feeding devices. Fig. 7 represents a detail plan view of a part of the feeding-plate, showing the oblong beveled-edge opening therein through which the needle plays. Fig. 8 represents a detail perspective view of the levers and tappet whereby the various motions of the feedingplate are produced, the parts being shown slightly separated from each other. Fig. 9 represents a detail perspective view of the tappet. Fig. 9 represents a detail bottom plan View of the same and of the prongs (shown in dotted lines) of the lever above it. Fig. 10 represents a detail bottom view of the movable frame which carries the feeding-plate. Fig. 11 represents a detail view of the movable frame and plates carried thereby, the latter being shown as detached 5 and Fig. l2 represents a detail view of the angular arm F, hereinafter described, and its connections.

In the said drawings, A designates the base of a sewingmaehine, which is adapted to be secured to a table, as usual,- and is cast with the frame of said machine.

B designates the driving-shaft, which is arranged transversely, journaled in bearings cast with or attached to said base, and provided with a pulley, b,which is adapted to receive a belt, whereby it may be driven in the usual manner. On the opposite end of said shaft is a hand-wheel, b, so that it may be operated by hand instead. This, however, is not necessary and is inserted chiefly for conven-` ience in illustrating the operation of the machine. Shaft B carries a cam, B', which operates the needle-lever C and the needle-bar e; also a second cam, B2, which reciprocates the shuttle-bar D. There is no novelty in these devices, and any other mechanism for operating the needle and shuttle may be substituted therefor. These cams are preferably protected by a casing, d. Shaft B also carries a small cam, E, which operates to depress the outer end of an angular arm, F, the inner end of which is sleeved on ashaft, G, arranged below shaft B and at right angles thereto. Said arm F rocks freely on shaft G. It is restored to its place, after being depressed as stated, by a retracting-spring, f, its upward motion, under the influence of said spring, being regulated by an adjusting-screw, g. Said spring and screw are of course attached to a iiXed part of the frame of the machine, and said screw serves to regulate the length of the stitches.

The hub of arm F, which turns on shaft G, is provided with radial studs f, and also with movable pieces or dogs F7 springs F2 being attached at one end to said studs, and at the other end to said pieces or dogs, respectively. The outer ends of said dogs are bent so as to overlap the periphery of a wheel, G', fast on shaft G, and the springs F2 cause them to cling to said periphery. The hub above men` tioned is provided with peripheral notches, each of which has a radial side in the direction of the tension of springs F?, and a curved I IOO ally-feeding mechanism may, however, be substituted lfor slowly rot-ating shaft G. This shaft carries a grooved cam, G2, which receives in its groove a downwardly-extending stud, h, of a transverse lever, H, which is pivoted at its rear end to a fixed part of the frame. The movable part of said lever is connected to a frame, I, which moves longitudinally of the machine on guides l'. This frame is provided with transverse guideways, which receive a transversely-moving plate, J, to which the feeding-plate K is attached. Thus the action of cam Gz will be to give longitudinal motion to said feeding-plate and to the material thereon. The frequency of such motions depends on the shape of the cam-groove in cam G. As shown, it is adapted to cause two complete longitudinal journeys of the fabric during each rotation of shaft G. In order to vary the longitudinal feedingto correspond to the varying lengths of different button-holes, we make a longitudinal slot, h', in lever H and a corresponding slot, t', above it in an extension of frame l, and we employ a movable fulcrurn consisting of a screw, I2, that has on its lower end a head which fits into slot h'. Said screw extends up through slot t', and receives above the same a clamping-nut, which holds it at any point to which said screw may be shifted in said slots. By thus moving the fulcrum backward or forward the throw of the lever is in? creased or diminished, thus increasing or lessening the longitudinal motion of the fabric.

The shaft B carries a cam, B, which is provided with two circular grooves, that are connected at opposite places, where the ends of the intervening partition are beveled off.

These receive a wrist-pin, Z, on the outer end of a lever, L. Said wrist-pin travels from one of said grooves to the other and back again,as determined by their shape and by the action of a pivoted beveled tail, L', which is turned past the corners or edges of the'beveled partition. Any other form of groove might, however, be substituted, if capable of giving the 'double oscillation desired, so that said tailpiece L' would not necessarily be required. The office of lever L is to cause the feedingplatc and fabric to make the necessary rapid motions back and forth between the stitches, so that the edges of the button-hole will be properly bound. This transverse movement is accomplished through the medium of an arm, M, which is pivoted on the fulcrum of lever L. This arm or lever is received between the prongs of a fork, m, on said lever, which stride it at such an interval as to allow a certain independent motion of either of said levers L and M, though generally they move together. The upper side of arm or lever M is provided with afixed fork or yoke, m',which receives a lug, m2, on the under side of trans'- versely-moving slide or plate J. Thus the rapid oscillations of lever L cause corresponding transverse movements of said plate and the feeding-plate carried thereby.

When either end of the button hole is reached,l it becomes necessary to provide for a longer transverse feed than usual, in order that the stitches may be of sufficient length to close said button-hole at that end. To effect this, we employ a grooved cam, N, on shaft G, a horizontally-acting lever, O, which is provided with a stud which enters the groove in said cam, and a sliding tappet, l?, which is arranged horizontally on the machine and provided with a gudgeon or stud, .1), that enters a slot in the other end of lever O. This tappet is arranged between levers L and M, and passes through guide-lugs in the former, so as to have no lateral motion therein. It is provided on one side with the laterally-projecting flattened portion p', and on the other with a similar portion, p2, arranged at a different part of the tappet longitudinally. It is spanned by prongs QQ', extending downward from arm or lever M. When the tappet is moved longitudinally into such a position that the part p' is opposite the prong Q, the lever M will be thrown farther to the right by the action of lever L. When in the other position, the reverse action will follow. There is a third position possible, in which the tappet is in contact with both prongs, inasmuch as the proj ecting portions p and p' are prolonged toward each other until they nearly overlap. When there is an interval between the tappet and IOO either prong Q or Q', the feeding on the side of that prong willv be less than on the other side, because the motion of lever L in that direetion cannot be transmitted to lever M until the said tappet comes incontact with said prong. Hence, in the first position stated, the machine is ready to sew on the right side of the button-hole; when in the second position, on the left side thereof; and when in the third position, (having then full transverse feed both ways,) to sew across the ends of the button-hole.

The operation of the machine is brieiiy as follows: While the longitudinally-feeding devices above described advance the material slowly,the transversely-acting lever L,through tappet l? and arm or lever M, keeps rapidly vibrating the feeding-plate, so as to make the needle sew alternately in the exact edge of the button-hole, (on the side of thelatter then being bound,) and a little back of the same, for the purpose of binding the said edge with a close succession of V-shaped stitches. end of the button-hole is reached, cam N, through the described connection, shifts said tappet so that both its parts, p p2, are in contact with the prongs Q Q', respectively, and,

When the shaped.

as above stated, the needle then makes a long stitch, which is repeated once or more to close the end of the button-hole. The cam N then shifts tappet P again, so that it will cause the transverse feedingto be in the other direction than that rst adopted, for the purpose of binding the other side of the button -hole. When the other end of the button-hole is reached, the tappet is once more placed in contact with both prongs and the end of the button-hole is closed.

In order to hold the fabric tightly and smoothly on the feeding-plate, and to insure evenness and accuracy in the sewing, we employ a clamp constructed as follows: A. stem, R, rises from the frame I. Ou this stem is a sleeve, S, having its upper end spiral or cam- ()n its lower end is a plate-spring, T, and a cam-shaped nut or collar, U, turning on said stem, bears against the cam-shaped end of said sleeve, so as to Hatten said spring on the fabric and hold the latter on the feeding-plate. This spring tends to force said sleeve upward when the action of said collar or nut allows it to do so. A downwardly-bent rigid arm, V, extends from said sleeve toward the needle and constitutes a presser-foot, to which a guide-loop is attached. The needle works within said guide-loop. By turning nut U in one direction both the spring T and presser-foot are clamped firmly against the fabric, holding it at two points. By turning said nut in the other direction they are released. Said nut or collar is held by a stop-collar, c, clamped to said stem.

The edge of the opening Z of the feedingplate is beveled, as shown at z, and the guideloop aforesaid, which forms part of the presser-foot, fits down within theinner edge of this beveled part 'z and holds the fabric securely without the need of serrations or notches. By turning the sleeve of the yclamp on the stem thereof the presser-foot may be removed from the neighborhood of the needle.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

The combination of lever L, tappetP, moving longitudinally in guides thereon, arm M, arranged above lever L and provided with downwardly-extending prongs which straddle said tappet, the transversely moving slide which carries the feeding-plate and is connected to said arm, a shaft which vibrates said lever transversely, and devices whereby said tappet may be shifted longitudinally, so as to cause the machine to sew on one-side of the button-hole or the other, substantially as described.

In testimony whereof We affix our signatures in presence of two witnesses.

JAMES BOWLING. JOHN CONNOLLY.

Vitnesses:

MATTHEW AUGUsrUs SOUL, WILLIAM HENRY HAYES.

Images