US276560A - Sewing-machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

l H. GHARMBURY.

h SEWING MAGHINE. No. 276,560. 7 Patented May 1,1883.

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UNITED STATES PATENT OFFICE.

HENRY CHARMBURY, on ivEWARK, NEW JERSEY.

SEWING-,MACHINE.

SPECIFICATION forming part of Letters Patent No. 276,560, dated May 1, 1883.

Application filed December 30, 18 82. (No model.)

To all whom it may concern:

Beit known that I, HENRY O ARMB RY, a citizen of Great Britain, residing at Newark,

in the county of Essex and State. of New'Jersey, have invented certain new and useful Improvements in Sewing-Machines; and I 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, reference being had to the accompanying drawings,

and to letters of reference marked thereon, which form a part of this specification.

The more especial object of this invention is to reduce the cost of constructing, to Silli'.

plify,and otherwise improve machines for stitching sweat-bands for bats, imitating the peculiar style of hand-stitching now in vogue, whereby the. cost of said bands are materially reduced, and the stitching more uniform and perfect. 1

A further object is to adapt the machine to produce, first, ordinary straight sewing, 'Figure 5, I; second, a stitch known as a zigzag stitch, Fig. 5, II; and, third, an imitation of hand-whipping, Fig. 5, III, all of which stitches have been employed on hats,

and can be produced by my device by manipulating the parts, as will be hereinafter set forth.

The invention. consists, first, in a machine capable of and constructed to produce either and all of the'above-mentioned stitches; second,a single-needle machine, constructed and adapted to imitate what is technically denominat'ed hand-whipping; third, in a hook arran gedin connection with the needle, above the bed-plate, having a compound motion or a combination of motions, whereby the needle-thread is caught when the needle-point is out of and above the face of the leather or goods, holds the same while the needle passes sidewise a certain distance, descends through the goods, rises, makes a return motion, and descends through the loop held by the book, after which action of the needle the hook releases the thread and then passes to a position preliminary to catching the thread for a second stitch.

tially as will be hereinafter set forth, and finally embodied in the claims.

Referring to the accompanying drawings,

'in which similar letters of reference indicate like parts in each of the several figures, Fig.

1 is an elevation of a sewingmachine em-' bodying my improvements. Fig. 2 is a plan of the bed-plateand attachments. Figs. 3and 4 are modifications, illustrating a method of actuating the book by power received fromthe needle bar. Fig. 5 illustrates certain stitches my device is capable of forming; and Fig. 6 is an enlarged view, illustrating the construction of a certainpeculiar stitch imitating in a degree What is known as hand whipping.

In carrying out my invention I prefer to construct the machine substantially as shown in Figs. 1 and 2, wherein A is the bed-plate: B,

the overhanging arm, carrying the vertical between thecarn and the needle, a slot, it, al-

lowing said sliding motion. The cam 0 causes the lever to move longitudinally, while the cam 01 gives a vibratory motion when in connection with a spring, k, which latter furnishes reactive power. Said spring is secured to the lever atj, while the free end bears against the lugor post 43. Upon the end of the lever, lying in close proximity to the needle, is secured adjustably a hook, it, which, when actuated by the lever; graspsthe needle-thread, while the feed carries. the material forward, and the needle descends through said material, forms a loop through which the shuttle passes, then. rises again, the feed acts, and the needle descends through the loop formed by the said hook.

Under certain hereinafter-specified circumstances it becomes necessary to throw the lever f,or the hook adjusted thereon, from a position of engagement with the ncedlethread.

To effect this, a shifting device, Z, is provided, a

by means-of which the lever is rendered ineffective in producing any'useful result. Said shifting device is preferably constructed with a tongue, which, extending under the leverf, engages with a shoulder. on said lever, throwing the latter out from a position of engagement with the needle-thread, as shown in dotted outline.

I prefer to construct in y device in connection with a machine for making what is technically known as a zigzag" stitch,illustrated in Fig. 5, II. Indeed, the device above described is only operative with such a machine. fore describe herein the main features of said zigzag machine, as far as they relate to the present improvements, a more full description being given in United States Letters Patent No. 255,143, granted to me on the 21st day of March, 1882; but I do not wish to be understood as limiting myself to a connection with said machine. 1

The above particularly-mentioned zigzagstitch machine has therein a switch-cam, m, secured to the horizontal shaft D, which actuates the lever'n, fulcrumed at r to a reciprocating motion, which is in turn transmitted through the pitman-rod 0 and sliding guide 1) to the swinging needle-bar q, all as will be understood. By raising the stud s, which holds the pitman and lever into operative combination, to a point in line with the fulcrum a,

it will be evident that any reciprocating motion will be stopped, and the needle-bar Q will have a simple-vertical movement, producing the ordinary straight stitching illustrated in Fig. 5, I.

To produce a sweat leather or band having the imitation hand-whipping stitch the operation is as follows, referring more especially to Figs. 2 and 6,in the latter of which 2 indicates the sweatleather, 3 the reed-covering, and 4 the reed. The needle perforates the leather at a and forms a loop beneath the leather, through which the shuttle passes,- the shuttlethread passing through said loop, being illustrated at I). The needle then rises, and the hook t, actuated to a forward and lateral motion by the cams, catches the thread, while the feed carries the leather forward, and the needle, influenced by the zigzag-stitch-producing mechanism, descends at 0 while the hook still holds the thread. The needle passes downward and presents the loop d to the shuttle, then rises again, while the feed and .zigzag mechanism causes it to descend at 6 through the loop held by the hook, which then releases the thread, preparatory to taking a new hold and a repetition of the whole process.

In Figs. 3 and 4 is illustrated a modification of my device as far as it relates to the hook actuating mechanism. In said figures, q is the vibrating needle-bar, adapted to form the zigzag stitch,said needle-bar having a pin, screw,

or projection, 1", adapted to enter the-slot of-- the cam-plate t, Fig. 4, at each alternate descent of the needle. The lower end of cam t-' I 'is secured to spindle a, Fig. 3, which rocks and I there slides in guides, one of which is mounted on the presser-foot and the other is shown at w, Fig.3, and is secured to the presser-bar. The upper end of cam-plate it rests on a wedge-piece, u, secured to the lower edge of the head of the machine. A smallhook, t,is secured to thespindle v in a position near the needle, and a spiral spring, mounted between guide 10 and camplate 16, secures contact with the wedge-piece u.

' When the projection r enters the cam-slot at one of the'vibrations of needle-bar it descends until it comes into contact with the rounded shoulder 5 when the cam is pushed to one side, Fig. 4, at the same time its upper end slips off the wedge-piece to, allowing the spiral spring to move'the spindle endwise, Fig. 3. This motion releases the loop held by the hook t. After the needle has completed its descent it rises until its point is clear of the goods, when the pin 1", striking the opposite shoulder, s, forces the cam-plate back toits original posi tion, the hook 25 passing partially under the needle and carrying the needle-thread with it. The needle-vibrating mechanism now carries the pin r out of contact with the. cam t, which remains at rest, while the needle'descends again through the goods, rises and vibrates back, and again engages with the. cam t, when the point of the needle descends through the loop held by the hook, and thepin again strikes the shoulder 8 releasing the loop, 850. The action of the hook on the threadis substantially the same in this case as in the one before mentioned.

Having thus described my invention, what I claim as new, and Wish to secure by Letters Patent, is-- v 1. In combination, in a sewing-machine, a shuttle, a vibrating needle, athread-detaining mechanism adapted to catch the thread of the vibrating needle and hold the same to form a loop, and a device adapted to throw said detaining mechanism into and from operative engagement with said needle, substantially as herein set forth and shown.

2. The combination, with mechanism adapted to vibrate the needle, of mechanism adapted to hold the needle-thread to allow a loop to he formed, the holding mechanism hein g adapted and arranged to allow the goods operated upon to pass between the same and bed-plate, substantially as herein set forth and shown.

3. The combination, with a sewing-machine provided with a shuttle having a vibrating needle, of a thread-catching device arranged above the bed-plate to allow the material to be drawn between said catching device and said bed-plate, all substantially as and for the purposes herein set forth and shown.

4. The combination, in a sewing-machine, of a vibrating needle, a hook, and a shuttle, all arranged and operating in conjunction.

5. In a sewing-machine, the combination, with-the shuttleand vibrating needle, of a hook actuated by the lever f, fulcrumed upon the shaft 0, cams c (1, receiving power from said shaft, the slotted lever f, working on the fulcrum g, and the adjustable hook t, all arranged and operating substantially as herein set forth and shown.

In testimony that I claim the foregoing I have hereunto set my hand this 27th day of November, 1882.

HENRY CHARMBURY.

Witnesses CHARLES H. PELL, OLIVER DRAKE.

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