US124854A - Improvement in sewing-machines - Google Patents

Description

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JOHN 8. PRICE & CHARLES E. BlLLiNGS.

lmprpVement in Sewing Machines.

N0. 124,854 Patented Marchi9,1872.

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JOHN B. PRICE 8L CHARLES E. BILHNGS.

Improvement in Sewing Machines. N0.124,854. I FatentedMarch19,1872.

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Improvement in Sewing Machines. Nq.124,854-.

Patented March 19, 1872.

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,1; FE? E TENT JOHN B. PRICE AND CHARLES E. BILLINGS, OF HARTFORD, CONNECTICUT.

v IMPROVEMENTiIN SEWING-MACHiNES.

Specification forming part of Letters Patent No. 124,854, dated March 19, 1872.

SPECIFICATION. To all whom it may concern:

Be it known that we, JOHN B. PRICE and CHARLES E. BILLINGS, of Hartford, Hartford county, Connecticut, have invented certain Improvements in Sewing-Machines, of which the following is a specification:

Nature and Objects of the Invention.

Our invention relates to the mechanism for moving the shuttle, needle, and feed devices when combined to form a new and improved scwing-machine; and also relates to the arran gement of an adjustable presser -bar. And further, our invention also relates to certain improvements in the shuttle.

Description of Accompanying Drawing.

. Figure I is a side view and partial section of our improved machine. Fig. II is an end view, showing the feed device and the take-up motion when the foot of the presser-bar is upon a thin fabric. Fig. III is a partial front view, showing the presser-bar raised. Fig. IV shows the spring operating the presser-bar and the device for raising the same. Fig. V is a detail view of parts of the feedmotion. Fig. VI is a partial plan view, showing the rub ber feed-plate. Fig. VII shows the needle operating mechanism in one position, and Fig. VIII shows it in another position, and Figs. IX

and X show the construction of the shuttle.

General Description.

A is the bed of the machine, beneath which the rock-shaft B is hung in bearings a a. Motion is given to this shaft from the driving-pulley of the machineby means of the arm b, connection c, and pin d on the pulley. This shaft B operates the shuttle, and also the feed, in the manner hereafter described. The pin 01 also up device operated with the needle-bar, and

the needle then returns up, completing its stroke, and arriving at its highest point at the same time that the shuttle completes its forward movement and is about to be returned.

During this up ward movement the take-up device draws up the loop and takes from the spool sufficient thread for the new stitch.

The feed is operated from the shaft B by means of devices we will now describe. The feed-plate G is formed of rubber, held up against the under side of the fabric which is being sewed, underneath the foot, by means of the bar H, which is operated by the cam K and the spring 0. This bar H is pivoted at one end to a projection beneath the bed of the machineby slotting over a pin passing through the said projection. It is provided with apin,

n, to form a stop to its motion in one direction, and adjustable screwstop u for the opposite direction, its throw across the machine being regulated to correspond with the length of the stitch required. By means of the cam K and spring 0 this bar H has an up-and-down motion, and by means of mechanism we will now describe a reciprocating motion is given to it at the proper times. The bar L is pivoted to the bed of the machine at 19, near the bearing of the shaft 13, and extends upward, and by means of a pin, 8, and slot 1, is attached to the feed-bar H, in such a manner that the said bar H has its up-and-down motion independent of any action on the bar L; but the latter is made to drive the feed-bar H in one direction, horizontally, by the spring-catch c, which catches in the notch w on the back of the cam K, and carries the feed-bar H a short distance horizontally against the spring M, and then, loosening its hold on the feed bar H, said bar H is released so that the spring M can pull it back horizontally, thus giving a slight rcciprocatin g movement to the feed-plate.

The take-up device consists of theithreearmed lever m pivoted to the needle-bar (J, and operated by the action of the needle-bar, the lower arm of the lever being connected to the presser-bar S by the connection I. The operation of this take-up device is to form the loop by carrying down the thread at a rapid rate when the shuttleis about to pass through, and then remain still while the needle is stationary and the shuttle passing through, and then drawing the thread up rapidly again when the needle-bar rises. It also, by its arrangement, takes the thread nearly in a direct line with the spool. thus being an improvement over take-up devices that take the thread horizontally. Any desirable tension device is arranged between the take up and the spool.

In the drawing, a screw is arranged with a slotted head, through the slot of which the thread passes. The device for keeping the foot of the presser-bar down on the fabric, and for raising the same when not in use, consists of the shaft I passing through the front of the frame, having the arm II projecting into a slot in the presser-bar, and having on its opposite end the hand-lever III. This shaft has a spring, IV, coiled around. it, one end of said spring being made fast to the shaft and the other end being fastened to the frame. A torsional spring-pressure is thus brought on the presser-bar. By pressing the hand-lever III back of the catch V the presser-bar and foot may be taken entirely away from a fabric. This take-up is adjusted automatically to the thickness of the cloth, for any additional thickness raises the bar and the point to which the connection 1 is pivoted thereon, so that this point bears a corresponding relation to the surface of the fabric, and the take-up is moved in the same manner as previously described.

The operation of the before-described de vices in relation to the movement of the shuttle and needle, and constituting the general operation of the machine, we will now show.

Supposing the shuttle to be at the extreme forward end of its stroke and the needle at the extreme upper end of its stroke, then the feed will be at its highest point and the catch V will have caught the notch in the cam K; then, as the drivingpulleyis turned, the needle will commence to pass downward, and the action of the feedbar H, operated by the cam K and the bar L bearing the catch V, is to move back with the shuttle a short distance against the spring M, carrying the feed and fabric with it, until the catch V-looses its hold and the spring M pulls the feed-bar H back. .As the backward movement of the shuttle is continued the feed-bar G is allowed to drop by the cam K and is carried down by the spring 0. Just previous to the shuttle arriving at the center the needle is brought to its lowest point. The loop is formed by the action of the take-up as the shuttle passes through, as before mentioned. The needle then returns to its highest point and the feed device to the point it occupied at the start. The takeup draws up the loop, and one revolution of the machine is accomplished.

The shaft 70 has attached to it, at one end, i

a disk, 00, to which the needle-bar is connected by the link y, and at the other end the crankarm his attached, which is connected to the crank f by the link g. This crank f is attached to the pulley T, which turns loosely upon the shaft 7c.

In Fig. VII the central crank I1. is shown on its upper dead point, and it will be seen that no motion will be imparted to this crank h by the motion of the pulley until the upper deadpoint of the crank f is passed, as shown in Fig. VIII, as the movement of the crank f and connection g is, until that time, around the pin of the crank h as a center, without moving the shaft k. In this manner we give the desired motion to the needle-bar before mentioned.

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

1. The device for giving the proper motion to the needle, consisting of the shaft In, its crank h, loose pulley T, crank f, and link g, arranged in relation to each other, and operating sub stantially as set forth.

2. The combination of the elements of the preceding claim with the shuttle-carrier, rockshaftB, arm I), and connection a, when arranged and operating as set forth.

3. The device for operating the feed, con sistin g of the cam K on the shaft B, combined with the bar H having the springs 0 and M arranged as shown, and the bar L, arranged with the spring-catch V, operating in connection with the cam K, all operating together to give an up-and-down and reciprocating motion to the feed, substantially as set forth.

4. The device for lifting and adjusting the presser-bar foot, consisting of the shaft I havin g spring IV around it, and the arms II and III, arranged and operating as shown.

5. The combination of the needle-motion, shuttle-driving motion, feed-motion, and feed plate, constructed and arranged, as shown, to operate as hereinbefore specified.

JOHN B. PRICE. CHARLES E. BILLINGS.

Witnesses:

R. F. HYDE, ALFRED J. MUNGAN.

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