US142013A - Improvement in sewing-machines - Google Patents

Description

3 Sheet s sheeti'.

sewingmachinesf No. 142,013. 'Patented AugustI9,1873-.

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SGWing Machines.

142,013. Pa!ented,AugustI9,'18?3..

-Wil'nesses:

UNITED STATES rrrcn.

EBENEZER A. GOODES, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SEWlNG-MACHiNES.

Specification forming part of Letters Patent No. 142,013, dated August 19,1873; application filed November 16, 1872.

To all whom it may concern:

Be it known that I, Ennunznn A. Goonns, of the city and county of Philadelphia and State of Pennsylvania, have invented new and usefullmprovements in Sewin g-Machines; and I do hereby declare the following to be a clear and exact description of the nature thereof, sufficient to enable others skilled in the art thereof. Fig. 3 is an end view of a portion thereof. Fig. 4 is a view of the upper side of the feed-bar and connected mechanism. Figs. 5, 6, and 7 show various positions of the looper during the operation of sewing. Fig. 8 is a detached view of the holder and bobbin and the holder therefor, the parts being separated. Fig. 9 is a central transverse section thereof, the parts being together.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates primarily to revolvin g hook sewing-machines, in which a stationary bobbin-holder is supported in proper position by means of a case, the loops being formed around the same by the hook or looper. The invention consists in a looper operated as hereinafter described; also, in the combination, with such looper, of a permanently-secured holder and case, constructed with a lateral opening for the reception of the bobbin, and through which the bobbin may be removed without disturbin g or displacing either the holder or case. The holder and case are properly adjusted when first made so as toproduce good work,

and then never require to be changed. The trouble and wear of readjustin g the parts, and the liability to disarrange them, and thus produce bad work, are obviated. It also consists in mechanism for adjusting and actuating the feed-bar.

7 Referring to the drawings, A represents the needle-bar, which may be operated by an oscillating arm, B, mounted on the stationary arm 0, which rises from the table. Below the table, and at its forward end, is mounted a transverse shaft, D, on which is placed a cam, E, which has a cam-face, a, and a cam-flange, b,

projecting from said face, and said camre ceives rotary motion from a pulley, F, which is fixed to the cam, and mounted on the axis D, the pulley being operated by a band or belt, G, which passes around a driving-wheel, H,

whose bearings are on an arm, J, which projects downwardly from the under side of the table at its opposite end. At the inner side of the cam E is firmly secured a crank-arm, K, which rotates with the cam, and on a portion of the crank which is attached to the cam is hung one end of a rod or arm, L, which extends longitudinally under the table, and is jointed to the lower end of the oscillating arm B, which has a downward continuation, B, beyond its axis on the arm 0, through an opening in the table beneath the same, where its end is connected to the rod L, as has been stated, andthus the rotation of the cam will impart motion to the rod L and arm 0, and

consequently to the needle-bar. M represents the looper, which consists of a longitudinal bar, N, having at its forward end a transversely-arranged hook-shaped piece, P, and a slot, R, in its main portion. The forward end of the bar is journaled to the crank K, and through the slot R passes a pin or screw, S, which extends transversely, and is secured to the connecting rod or arm L. T represents the feed-bar, which is arranged transversely, and connected to a longitudinal bar, U, which is hinged to the under side of the table. An arm or bar, W, is pivoted to said bar U, and its forward end 0 rests on the cam E, and communicates motion from the latter to the feedbar T., A screw, X, is fitted in the bar U, and its head is grooved, as at d, and in the groove rests the rear end 0 of the arm W, whereby by turning the screw the forward end of said arm may be moved nearer toor further from the cam-flange b of the cam E, and the length of feed and consequently of stitch is readily regulated or adjusted.

It will be seen that by the rotation of the cam its face a elevates the feed-bar, and the flange b advances the same, the return motions being accomplished by the action of a spring or springs suitably applied; and it will also be I for the thread. The bobbin Z consists of two disks, m, of size equal to the central space in the holder, and a connecting-piece, on which the thread is wound, the side disks confining the thread in place and preventing entanglement thereof, and also forming the axis or bearin gs for the bobbin in the shuttle. A represents the case, which is secured to the under side of the table, and consists of two circular open concave jaws, A, which are arranged vertically and longitudinally, and so located that the needle descends at the side of one jaw, and the looper M is moved around the case, and consequently around the holder. The interior of the jaws A is properly fitted to the holder, which is arranged therein and permanently secured when the machineis built. The jaws are open or annular, and the opening in the outer jaw corresponding with the central space of the holder permits the introduction and removal of the bobbin. The holder is pre' vented from rotating in its case by a pin, it, which projects from the inner face of one of the jaws, and enters a notch, h, in the holder.

Thethread from the bobbin is passed through the guide-opening g in the holder. The spring it holds the bobbin in position in the holder, and also serves to give tension to the thread thereof, said spring being secured to one side of the holder, and bent or turned to enter an 7 opening in the bobbin, (see Fig. 9,) so as to bear on the latter. The hook P takes a loop from the needle, and said loop is carried entirely around the holder and spread, so that the thread is passed along on both sides of the holder, between said sides and the concave side of the case. When the loop is thrown off from the hook P it is between the holder and case, and the thread of the bobbin is within the loop, whereby the stitch is formed, which is then taken up or tightened by the ascent of the needle and the strain of the thread as the next loop is being formed.

Owing to the described construction there is no necessity for disturbing or displacing the holderor case, and consequently the holder is subjected to very little wear, and its proper relative position secured in setting up the machine is maintained without difficulty. The construction also facilitates the removal and replacement of the bobbin.

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

l. The revolving hook-looper M pivoted to the crank-wrist K, and connected by slotted 5:111 R and pin or screw S with the needle-actuatin g connectin g-rod L, operated directly from the same crank, as and for the purpose herein set forth.

2. In combination with the subject-matter of the preceding clause, the case A supporting the doiible-convex stationary bobbin-holder, and provided with an opening to permit the independent removal of the bobbin, as set forth.

3. The pivoted bar W and adjusting-screw X, in combination with the feed-bar U and a rotary actuatiu g cam, substantially as set forth.

The above signed by me this 26th day of September, 1872.

' EBENEZER A. GOODIES. \Vitnesses:

JOHN A. WIEDERsHEIM, HARRY M. WIEDERSHEIM.

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