US85633A - Improvement in sewing-machines - Google Patents

Description

3 Sheets-Sheet 1.

Patehted Jahy 5, 1869.

MM. BARNES.

- Sewing Machine. No. 85,633;

,wi zw ray? ZZ MQ III/7 755555 3 Sheets Sheet 2; M. M. BARNES.

- Sewing. Machine. 7 No.. 85,633; 4 .v Patented hwy-5,1869.

3 Sheets-Sheet 3. M M BARNES Sewing Machine.

Patented Jan! 5, 1869.

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Q Ms W tiuiterl finder Qitir'e.

M. M. BARNES, OF NORTH ADAMS, MASSACHUSETTS.

Letters Patent No. 85,633, dated January 5, 1869.

IMPROVEMENT IN SEWING-MACHINES.

The Schedule referred to in these Lettera Patent and making part of the same.

To all of whom it may concern Be it known that I, M. M. BARNES, of North Adams, Berkshire county, Commonwealth of Massachusetts, have invented certain new and useful Improvements in Sewing-Machines ;.and I do hereby declare that the following is a full and clear description thereof, reference being had to the accompanying drawings, and to the letters of reference marked; thereon.

In the drawings- Figure 1' is a side and partial sectional view,

Figure 2 is a cross sectional view,

Figure 3 is an end view, and Figures 4, 5, 6, 7,-and 8 are detail views of parts pertaining to my machine.

In describing this machine I will enumerate and describe in order the points which I regard as novel and improved.

The Bobbin- Winder.

This is arranged so that by merely bringing it down in contact witlithe puney'li, inorder to give it motion, the rest of themachiue is disconndcted'from the power, and remains still.

' This is accomplished by means of the clutch I, (on the main shaft J which vis operated by means of the lever K, connected with, the frame L of the bobbinwinder, and throws-the traveller M of the clutch back, when the bobbin-winder is brought down, as shown in red lines, fig. 1, allowing the. shaitJ to remain stationary, while the sleeve N, of the pulley H, revolves on -it, at'oneend, as a bearing.

A spring, 0, keeps the traveller M in clutch whenever the frame L is up, and the lever K inoperative.

' The advantages of this arrangement are, that the bobbin-winder can be revolved much faster than is proper for the machine to be run, and yet no extra motion is required in order to accomplish the act of disconnection, the same motionthat is always required to set the bobbin-winder in gear accomplishing it.

The Tension-Device for the Thread. This issituated upon the frame of the needle-bar at P, and its peculiar construction is shown in fig. 4, and

consists, ofa cup, Q, having an inside cylinder-,Rffitting into it, and arranged so that it can be turnedby .a knob, S, on the top.

This cylinder It fits closely at the top edge of the outer cup- Q, but below that there is sutficient room for a large thread between them.

Slots, a and a, are cut into the sides of this cup, and are open. at the top.

A slot, 1), is cut through the top and sides of the cylinder R, and when the two parts are in the position shown in fig. 4, the slots come opposite to each other, and leave a straight passage through both shells: In this position the thread is passed through, by being slipped down from the top, but when in place, the cylinder R is turned, as shown in 1 of figr4, and a fIlC- tionis produced, which may be increased or dimin ished by turning the knob of the cylinder B, so as to a and I) in the two parts of the tension-device.

increase or di ihinish the'relative distances of the slots This forms a very compact and easily-adjusted tension, and

one peculiarly adapted to the sewing-machine, from its shape and construction.

The Foot-Bar.

This is shown in detail in fig. 5, and has two important points, the arrangement of the lever 'T, for raising and depressing it, and the lock .thereon, and the arrangement of the socket at'the lower end of the foot-bar, for the foot to bechunpcd in. I

The foot-bar U is placed in a hollow cylinder, V, supported in the forward end of the frame G.

The upper portion of the foot-bar U has a spiral spring, XV, around it, which is confined between the upper closed end of the cylindrical case V and a shoulder, X, on the bar, and tends always to press the latter down.

A guide-pin, c, in the bar, working in a slot, (1, cut into the side of the cylinder V at this poiiit,'prevents the bar from turning, and also acts as a shoulder, against which the lever T acts. to raise it, which it does by means of a cam-shoulder, Y, which comes under the pin 0 when the outer end of the lever is raised. When the lever is down, as shown in the figure, the pin 0 rests in a notch, (l, in the .short end of the lover.

The position of the leverT issuch that, when the needle-bar descends, the levc'r A strikes against the end of the lever, (shouldjit be raised,) and presses it down, letting the ibot-lmrfall, so that, in operating the machine, it preparcsitself for work, by setting the foot down to its proper posit-ion,"hy the first movement of the trcadle.

At the lower endof the foot-bar is attached a device for cutting the thread, when it is desired to do so, af-

outer prong, =12, of this has its inner edge, 0, sharp.

The edge of the other platc, -l, crosses the knife edge-of the plate k, and forms a notch for the thread to be caught on.

\Vhen the edge becomes dull, the plates may be adjusted so that a new portion of the edge ispresented to the thread. This is done by means of the screwholcs of the screw 'm-,'through both plates being elongated, and as the plates are hinged together at their lower ends by a pin, 1), by loosening the screw they may be set differently;

The Food. I

This is arranged so that a positive reciprocating motion is obtained, by means of an eccentric-lever, q, connected with the main shaft. This is shown in fig. 3, and it is seen that the motion desired, viz, a back' motion, with the corrugated-face of the feed-bar pressed up against the under side of the cloth, just after the needle has risen from taking a stitch, is obtained by means of the lever q, aforesaid, while the up-and-down motion required to clear the feed from the cloth in returning, and to throw it up into bite again before feeding, is obtained by auothercam-lever, s, which has the feed-bar r attached to it about thecentre, and extend ing upward. V v

The two levers s and q are arranged together as follows: An elbow, t, is pivoted at the apex to the bed of the machine at it. This elbow has a vertical arm, v,'and a horizontal one, w. To the end of the vertical arm v isattached the endof the lever s, by a pin, and

to the other arm, w, is connected the lever q, by means of an adjustable pivot, x, inthe following manner: A

slot,y,- is made lengthwise in the arm w, through which passes a pin projecting from the back of a slide, 1. The pin is provided on the end with a head, that rests against the opposite side of W. I The slide 1 slides upon the arm of the lever g, which .is pivoted near the centre to a projection on the bed of the machine at 2. The slide 1 has a set-screw, 3, in its lower end, by which it can be clamped in position to the arm of the lever q, thus adjusting the stroke of the feed, and consequently the length of the stitch taken in'the cloth.

The strap of the lever s is open at the inside, so that it can move laterally in order to accommodate itself to the motion of the leverr The operation of this arrangement is as follows:

We will suppose the parts in the position shown in fig. 3; that is, the feed-bar is pressed up against the under side of the cloth, and ready to move forward and shift the cloth with it. The shaft, turning, now

raises the shaft-end of the lever q, depressing the other, and with it the arm w of the elbow, which throws the .foot-bar by means of being, as before stated, regulated by the adjustment of the slide-post 1.-

Now, having described my invention, What I'claim as new, and desire to secure by Letters Patent, is- I j j 1. The arrangement of the bobbin-winder, in combination with the clutch I, on the main shaft, and the lever 'K, operating it, substantially as shown and described.

2; The tension-device, consisting of a cup, Q, and cylinder R, provided with slots at and a, all constructed and arranged in the manner shown and described.

3. The arrangement of the lever T, (of the foot-bar) in combination with the foot-bar, so that the leverA, in descending, shuts down the lever, and allowsthe footbar to be pressed down, substantially as shown.

4. The thread-cutter, consisting of the adjustable plates-k and Z, pinned together and attached to the the screw m, substantially as shown.

5. The combination of the eccentric-lever q, lever s, elbow t, adjustable slide 1, and feed-bar 0, arranged together and constructed substantially as herein described.

M. MUBARNES.

Witnesses: E. F. BARNES,-

G. H. LIDFORD.

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