US176917A - Improvement in sewing-machines - Google Patents

Description

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' SEWING-MACHINE. v No.176.917. Patented May 2,1876.

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. N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON D C -mrnn STATES ELOYI BoUsoAv, .13., OF NOBWALK, OHIO.

IMPROVENTENTIIN SEWING-MACHINES.

I Specification forming part of Letters Patent No. 176,917, dated May 2, 1876; application filed To all jwhomt't may concern;

Be it known that I, E oI-Bo soA Jr., of Norwalk, county of Huron, and State of Ohio, 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 .willenable others skilled in the art to which itpertains to make and use it, reference being had to the accompanying drawings, which formzpart of this specification.

My invention consists incertain 7 details. of construction in a sewing-machine, as hereinafter specified and claimed. 7

In the drawings, Figure 1 is an inverted view of a machine, showing the shuttle-driver audits cam-slot, Fig. 2 is a side elevation of a machine, showing the vertical shaft, the cylinder, shuttle-driver, and feed-shaft. Fig. 3'is a cro'ss-sectionof the feed-shaft, eccentric sleeve-journal, and its hanger. Fig. 4 is the shuttle and its details. Fig. 5 is a front elevation of the :feed regulatingand operating mechanism. Fig. 6j'is the needle-bar with its wing device for keeping it from turning in its bearings.

O is the elevated horizontal shaft; Z Z are the bevel-gears. O is the vertical shaft. M is the cylinder, having the cam-groove N in its periphery, and crank-pin B in its lower face. I is the shuttle-driver, and K its cam slot. G is the feed-shaft, and L its crank-arm.

H is the eccentric sleeve, and. I its hanger. E is the shuttle; G, its lid;-F, the tensionspring, and i t notches for threading the tenslon.

The operation of my invention is as follows: The power is applied, in this as in all machines of this class, to the elevated horizontal shaft 0; thence it is communicated to the vertical shaft 0 through thebevel-gears Z Z. The vertical shaft, with its cylinder M, engages, first, the horizontal rock-shaft O, which actuates the feed through the cam-groove N and crank-arm L, and, secondly, the shuttle driver P in itscam-slot K, through the crank-pin B. The shuttle-driver is of the oscillating class, and drives the shuttle through an are, at a certain period in each revolution of the vertical shaft 0 and its crank B, the latter operating, as stated, in the cam-slot K, gradually moving toward the fulcrum, thereby destroyat the heel of the shuttle.

May 21, 1874.

ing the leverage equilibrium, and accelerating the motion of the driver P. This movement I improve by causing the shuttle to pass through the loop. This being done, the proper shape of the cam slot K and crank-point B, moving away from the fulcrum of the shuttledriver P, allows the shuttle to slacken sufficiently for the needle-thread to be drawn up cylinder llL-inclining from near the upper face to near the lower face of the same, and vice versa, in such a relation to the crank-point B as to cause the shaft 0 to rock at proper times, and move the feedin suitable coordination with the other mechanisms.

It is desirable in sewing-machines that the feed should be so far adjustable as to permit the raising or depressing of the same as the various kinds of work to be performed require. This I accomplish by fitting the end of the rock-shaft 0, immediately under and supporting the feed mechanism, into an eccentric'sleeve-journal, H, held in the hanger I. By inspection of the drawings, Fig. 3, it is obvious that the vertical adjustment of the feed is performed by turning the eccentric H in the hanger I. I

My shuttle is closed and semi-cylindrical,

with one plane face coming in contact with projects up through a slot in the needle-plate,- and moves on a bar, D, one end of which is pivoted in a hanger extending from a cloth-.

plate. The other end of bar D is recessed as shown.

,ATENT litre.

This motion is Rig-idly affixed on shaft 0 is a lever, B, having an arm, at. extending upwardly, and'a curved downward projection, 0, with an enlarged tubular threaded end, f, for receiving a pointed screw, g. In the rear of the lever It, and on the shaft, is a lever, S, held loosely in place by a collar on the shaft. This lever is connected with lever B by a helical spring, d, and has an upper arm, I), with an inclined or cam surface, h, on its rear face, and a lower arm, 0, whose end is beveled, and rests against the point of the screw g.

As the shaft 0 is rocked the arms a. and b strike against a point, K, on the feed-bar, and thereby move it back-and forth. At the same time the cam H 011 the arm 11 plays in the recessed end of bar D, and elevates and depresses the same, which motion is communicated to the feed-bar.

The distance between the upper ends of armsa and 1) determines the length of feed,

and this distance is regulated by the screw g; for the farther the point extends through the sockets f, the closer are brought the arms a I), and as the-screw is withdrawn the arms separate. The point of the screw, comingin contact with the beveled end of arm 0, causes these adjustments; and I prefer to make the point of the screw conical. A positive and regular motion, both horizontally and vertically, is thus given to the feed. I

The device which I make use of to prevent a round needle from turning in its bearing is thefollowing: The cross-head X on needlebar a has a guide, W, projecting from the side, and fitting loosely in a groove cut in the corresponding side of the front plate of the machine, and in a line parallel with the needie-bar. The groove, of course, allows the guide 'to move vertically as'the needlebar carries it in its regular motion, but the groove and guide being fitted closely enough to prevent the needle-bar from turning.

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

1. Asa means of causing the forward motion of the shuttle and upward motion of the needle to stop at the same instant, and begin the reverse motion simultaneously, the horizontal oscillating-lever shuttle-carrier P, provided with the cam-slot K, the needle-bar n, provided with the cross-head X and intermediate mechanism, substantially as set forth, for driving the same.

2. The combination, with the horizontal driveshaft 0 and vertical shaft 0, of the rock-shaft O, for actuating the feed, substantially as described.

3. The combination, with the rock-shaft O and feed mechanism, of the rigid jaw- S, movable pivoted jaw F, and adjustable screw g, for regulating the throw of the feed, substantially as described.

4. The combination, with the shuttle, of the lid G, the said lid being hinged directly to the heel of the shuttle,substantially as set forth.

5. The combination, with needle-bar a, of cross-head X, guide W, and face -plate, provided with the slot u, whereby any tendency to revolve is obviated.

. 6. The combination, with the shafts O O and bevel-gears ZZ, of the cylinder M, bearin g the cam-groove n in its periphery, crank-pin B on its lower face, the crank L, and shuttle arm P, provided with the curved slot K, substantially as shown and described.

7. The shuttle E, constructed as described, and provided with the adjustable tensionspringF and the threading guide-notches i i, substantially as shown and described.

8. The combination of the feed-bar A, rigid lever 1t, loose lever S, spring d, and conicalpointed screw g, substantially as shown and described.

ELOI BOUSOAY, JR.

Witnesses:

N. S. G. PERKINS, J. R. PERKINS.

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