US322811A - Maohdtes - Google Patents

Description

4Sheets--Shee t 1.

I. EGGE & G. J. A; SJOBERG.-'

BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.

No. 322,811. PatentedJuly 21, 1885.

(No Model.)

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F. EGGE & O. J. A. SJOBERG;

BUTTON HOLE ATTACHMENT FOB SEWING MACHINES.

No. 322,811. Patented July 21, 1885.

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4 Sheets--Sheet 3.

(No Model.) A I I A F. EGGE & C. J. A. SJOBERG.

v BUTTON HOLE ATTACHMENT E H SEWING MACHINES. No. 322,811. Patented July 21, 1885.

., F a I N. PETERS. Pholo-Lilhngnpher Washington. D. c.

(NoModeL) 4 Sheets-Sheet 4.

P EGGE & 0. J. A. SJOBERG. BUTTON HOLE ATTACHMENT FOR SEWING MACHINES. No. 322,811. v Patented July '21, 1885.

8%Illlmm"!mm"I""mm"IIIHHIHIIHIIIIHHllllllllllllllllllllllllllIlllllllllllfllllll%g llllilllllillI![Ill|Illlllillllllllllllllllllllllllllmlill""[IIHHIHIIINHM||||||||l||||||| 7/0 1%7ws$es Ivivehiws C20 2 Jfl. 5 03% w. rJQ/Mzakr Q B1 NITED STATES PATENT OFFICE.

FREDERICK EGGE AND CARL J. A. SJ OBERG, OF BRIDGEPORT, CONNECTICUT, ASSIGNORS TO THE SMITH & EGGE MANUFACTURING COMPANY, OF SAME PLACE.

BUTTON-HOLE ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 322,811, dated July 21, 1885'.

Application filed September 6, 1884, (No model.) Patented in Canada October 14, 1884, No.20,342.

invented certain new and useful Iniprovements in Button-Hole Attachments for Sewing-Machines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will-enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to certain novel and useful improvements in button-hole attach- 5 ments for sewing-machines, and has for its ob ject to provide a simple and comparatively inexpensive machine of this description, by means of which button-holes may be speedily and effectually worked and perfectly barred at the ends; and with these ends in view our invention consists in the details of construction and combination of elements hereinafter fully explained, and then specifically designated by the claims.

In order that those skilled in the art to which our invention appertains may more fully understand its construction and operation, we will proceed to describe the same in detail, referring by letter to the accompanying drawings, forming a part of this specifi cation, in which Figure l is a plan view of our attachment; Fig. 2, a side elevation; Fig. 3, a plan view, with the top casing removed; Fig. 4, a section taken at the line 00 m, Fig. 6; Fig. 5, a section taken at the line m m, Fig. 6; Fig 6, a section taken at the line 00 m", Fig. 1; Fig, 7, a section taken through the line 00 m Fig. 1; Fig. 8, a section taken at the line m* m, Fig.

e 1; and Fig. 9, a detail enlarged View of a button-hole, showing the manner in which the barring-stitches are made at the ends, the location of said stitches being shown by loops.

Similar letters denote like parts in the several figures of the drawings.

A is a rock-shaft, which is adapted at the forward extremity to be connected with the needle-bar of a sewing-machine. This shaft is mounted within uprights B projecting from the casing C. Loosely hung on said shaft is a dog, D, and rigidly secured on the rear end of the shaft is a plate, E, having lugs F integral therewith. Through these lugs are passed set-screws G,extending toward thedog D and on opposite sides thereof, and by the adjustment of which the throw of the dog is regulated, as will be readily understood.

H is a lever pivoted to the bed-plate I, and with its forward end formed into a box, J, within which is arranged the pawl K in such manner as to slide freely.

L is an ordinary wire spring connected to a pin, M, projecting from the pawl, and with its free ends attached to the box, the object of i this arrangement being to give to said pawl a spring movement.

N is an L-shaped lever pivoted to the bed plate, and having its outer portion cut away or recessed, as shown at O, and its inner portion provided with an elongated slot, P.

Q is a wiper and R a ratchet. This wiper and ratchet are preferably made from the same piece of metal, and are pivoted to the bedplate in such manner that the wiper is within I the recess 0, as shown at Fig. 5, while the ratchet extends over the recess and immediately above the plane of the lever N,as clearly shown at Figs. 3, 4, and 7. It will be readily understood that the action of the wiper within the recess will cause the lever N to vibrate. \Vithin the lever H is a slot, S, within which. projects the dog D, as shown at Fig. 7, and by the rocking of the shaft A motion is thereby communicated to the lever H. At each vibra tion of this lever the pawl K'will engage with the ratchet R and turn it around one tooth. On the backwardmovement of said lever the pawl will, as soon as it gets beyond the next preceding tooth, spring behind the sameand be in position to turn the ratchet at the next forward movement of the lever. The construction of the recess 0 and the arrangement of the wiper therein is such that, at each intermittent turning of the ratchet by the pawl, one of the cams of the wiper will strike against the wall of the recess, and thereby cause the lever N to vibrate.

Within the slot 1? is a hollow pin, T, provided with a head, U, on the bottom and thread ed interiorly. V is a screw extending within mo racked at the sides.

said pin, and adapted to set against the surface of the lever N, whereby the location of the pin along the slot may be fixed at any desired point for the purpose presently explained.

W is a toothed wheel; X, an eccentric-disk, and Y atrippet, all arranged on the same short shaft, and in such manner as to rotate in unison. We can, if desirable, form these parts out of the same stock in one piece; but we prefer to connect them rigidly together with their perforations for the shaft in alignment.

Z is a plate pivoted to the bed-plate, as seen at A. The rear portion of this plate is fork ed, as shown, and provided with inwardly-projecting lugs B, which extendaround on opposite sides of the eccentric-disk X, and are in constant contact therewith, for the purpose presently explained, the plate being raised from the bed-plate by the washer 0, Fig. 6, in order to elevate it to the same horizontal plane with the disk, and thereby not interfere with the movement of the wheel W.

D is a plate, and is fastened by pins E to the under side of the plate Z.

F are spring-arms, formed integral with the plate D, and extending upward at right angles thereto above the level of the plate Z, for the purpose presently explained.

G is a Hat spring, (see Figs. 4 and 6,) which is bellied upward at the forward portion and secured to the plate Z by the screw H driven into the pivot A.

I is the oscillatorhaving two elongated slots, J K, (seeFigs. 3 and 6,) the former being This oscillator in its assembled position rests upon the spring G and the rim L of the set-screw V, said rim acting as a washer interposed between the oscillator and the lever N, the set-screw itself extend ing upward through the slot K and fitting closely therein. The spring-arms F embrace the oscillator closely, as shown at Fig. 3, and act as a yielding fulcrum for said lever, as will be hereinafter set forth. Motion is imparted to the oscillator from the lever N through the medium of the pin T, which extends through the slot K in the lever. By shifting the said pin along the slot 1? the vibration of the 0scillator is increased or decreased, according as the pin is moved nearer to or farther away from the fulcrum. of the lever.

M is a ratchet-wheel (see Figs. 3 and 6) secured on the end of ashortshaft, N, the upper extremity of the latter being formed into a small pinion, O, which extends below the under surface of the said wheel a distance equal to the thickness of the oscillator. The shaft N has its bearing within the hollow post 1?, and extends therein far enough to bring the-pinion O in the same horizontal plane with .the oscillator and between the racksin the sides of the slot J. The spring G acts against the bottom surface of the pinion O for the purpose of insuring'a steady movement thereof and preventing slipping.

Q is afriction-spring placed aroundthe hollow pivotal post R, (see Fig. 7,) and bears against the casing O and the lever H for the purpose of insuring a steady movement of the latter.

' S is also a friction-spring, which .bears against the casing and the ratchet R, to pre-. vent the turning of the latter by the spring-pawl K on the return movement of the lever H. If desired,we can readily use the ordinary detent or click to accomplish this purpose.

T is a spring-pawl pivoted to the under side of the lever H, and adapted to engage with the toothed wheel W and turn the same at each forward vibration of said lever, as will be presently explained.

U is also a spring-pawl pivoted to said lever at the upper forward extremity thereof, and adapted to turn the ratchet M at every forward vibration of the lever.

The operation of our improvement is as follows: The vibration of the lever H imparts motion to the oscillator, as hereinbefore set forth. When a button-hole is stitched along the side, the pawl T always lies at the base of the incline of one of the two long teeth of the wheel W, and the play of said pawl is only snfficient to enableit to engage with the short teeth. Accordingly, the said wheel, the eccentric X,

and trippet Y are stationary during said stitching, and no motion whatever is imparted to the plate Z. The normal position of the pinion O is that of engagement with one side of the rack in the oscillator, the particular side being, of course, dependent upon the side of the buttonhole which is first stitched. At every upward movement of the forward arm of the rock-shaft A, the ratchet M will be turned by the action of the pawl U on one of the teeth, and the pinion 0 will act on the rack and thereby feed the oscillator in order to carry the work forward or backward under the needle, so as to stitch the button-hole throughout its length.

. V is a push-bar, having an ear, WV, (see Figs. 3 and 8,) projecting laterally therefrom, and adjustably secured to a side extension, as, of the oscillator by means of a screw, Y, headed at the bottom and passed upward through the elongated slot Z, (see Figs. 3 and 8,) and surmounted by a thumb-nut, A. When the oscillator has been fed forward so that the stitching has extended to-the end of the button-hole, the push-bar will strike the trippet Y and turn the toothed wheel W around sufficiently to enable the pawl T to drop in front of the long tooth, and at each vibration of the lever H turn the said wheel until the pawl again falls into position at the base of the incline of the other long tooth. WVhile the wheel WV is being turned around, the constant action of the eccentric X on the pivoted plate Z causes the latter to change its position around the pivotal point thereof, and since the oscillator is carried by said plate the reciprocation of saidoscillator is effected between different vertical planes, thereby causing the barringmade in different places in the fabric, as shown at Fig. 9. When the action of the eccentric has caused the position of the oscillator to be so changed that the pinion and racks are disengaged, the feeding movement will stop, and the timing of the action of said eccentric is such that the oscillator will be carried gradually, so that the other side of the rack may engage with the pinion, a succession of barring-stitches being made in the meantime in alignment. XVhen the rack and pinion engage again, the oscillator will then feed in a direction opposite to that above described, and barring-stitches in different places will be made at the other side of the button-hole until the wheel 7 has ceased to turn, when the vibration of the oscillator will become regular and constant and the stitching of the button-hole at the other side effected. (see Fig. 4,) secured to the side of the oscillator opposite to that at which the bar V is connected, strikes the trippet Y on the reverse feeding movement of said oscillator, and enables the pawl T to operate on the wheel XV and effect the barring at the other end in precisely the same manner as above described.

The number of barring-stitches depends upon the number of teeth in the wheel WV, because, at every movement of the eccentric caused by the action of the pawl T on said wheel, the stitches will be made in a direction at an angle to the line of stitches along the side of the button-hole. If more teeth are placed in the wheel the timing of the eccentric must be such that the oscillator will be carried more gradually, in order to allow a greater number of stitches to be made in the same space.

The normal position of the trippet Y is in alignment with one of the push-bars V B,so that the latter may perform their functions,and at the same time permit the pawl T to operate along the incline of one of the long teeth without turning the wheel, whereby the oscillator may be fed and oscillated within the same vertical planes, thereby enabling the stitches to be made uniformly along the side of the button-hole.

The length of button-hole is accommodated by the adjustment of the push-bar V through the medium of the screw Y and thumb-nut A, since the farther the push-bars are apart the greater will be the longitudinal movement allowed to the oscillator before the trippet is acted upon. In order to adapt ourimprovement to machines in which the needle-bar has a greater or less vertical play than usual, the screwsG are simply run out or in, as the case may require, thereby allowing more or less lost motion before the dog D is operated upon. Any suitable cloth-clamp G is attached'to the oscillator. The yielding fulcrum enables the oscillator to be fed forward and vibrated, while at the same time the movements are positive, as the spring-arms always maintain a grip.

A push-bar, B,

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

1. In a button-hole sewing attachment for sewing-machines, the oscillator or cloth support having two racks, and fulcrumed by means of two springs embracing said oscillator at each side, and adapted to be fed forward and backward by the action of an intermittently-revolving pinion on said racks, in combination with means for shifting the normal position of the oscillator laterally, and throwing said pinion out of engagement with the rack, whereby a series of barring-stitches may be made in different places in the fabric and across the end of the button-hole, substantially as set forth.

2. The pivotalfulcrum-plate having springarms adapted to constantly embrace the oscillator, and capable of being shifted around its pivotal point by the action of an eccentric,in combination with the oscillator and the devices for effecting the vibration and feeding of said oscillator, substantially as shown and described. x

8. The eccentric, trippet, and wheel having two long teeth and intermediate short teeth, all secured on the same short shaft, in combination with the pivoted plate having spring arms, the oscillator fulcrumed between said arms and provided with a stationary and an adjustable push-bar,api11ion arranged between racks in the oscillator, andfthe devices for continually revolving said pinion and for operating against the teeth in said wheel,whereby the oscillator is fed and the bearing-stitches formed, substantially as set forth.

4. The combination of the rock-shaft A, adapted to be actuated by the Vertically-reciprocating ncedle-bar of a sewing-machine, dog D, depending from said shaft and operated by adjustable abutments, pivoted lever H, having attached thereto spring-pawls U T K, lever N, cutaway to accommodate a wiper,

Q, secured on the same short shaft with the ratchet-wheel R,'pivoted plate Z, having upwardly-extending spring-arms F, wheel WV, having two long teeth and intermediate shorter teeth, eccentric X, arranged between two diametrically-opposite points of contactof the plate Z, trippet Y, said wheel, eccentric, and trippet being secured on the same short shaft, oscillator I, fulcrumed between said spring-arms, and having at its forward portion racked slot J, and at the rear elongated slot K, pin T, extending upward through the slot P in the lever N within the slot K, and adjustably secured by means of set-screw V, ratchet-wheel M, secured on the extremity of short shaft N, pinion 0, also secured on said shaft and extending below the under surface of the ratchet and between the racks in the sides of the slot J, and a stationary and an adjustable push-bar, V B, attached at the sides of the oscillator and adapted to act on the trippet, substantially as shown and set forth.

5. The L-shaped lever, pivoted to the bedplate and recessed at one extremity, and vibrated by a wiper-wheel revolving intermittently within said recess, in combination with the oscillator connected to the lever by a pin adjustable along elongated slots in said oscillator and lever, whereby vibration is imparted to the oscillator, and the throw of the same determined, substantially as set forth.

6. The combination of the pivoted fulcrumplate, the oscillator supported thereby, and the eccentric, having two dia1netrically-opposite points of contact with said plate, and adapted to move the latter to and fro, substantially as set forth and described.

7. The lever H, carrying spring-pawls K T U, in combination with the ratchet R, toothed wheel W, and ratchet M, substantially as set. forth.

8. In combination, with the toothed wheel,

FREDERICK noon. CARL J. A. SJOBERG.

\Vitnesses:

S. S. WILLI MsoN, "W. J. HAVILAND.

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