US255296A - Sewing-machine - Google Patents

Description

( No Model.) 3' Sheets-Sheet 1'.

J. T. JONES. SEWING MACHINE. No. 255,296; Patefited Mar. 21,1882.

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- 'T. JONES. SEWING MAGHINE.

Patented Mar. 2 1 ,188Z.

N. PETERS. 'Fhou gimu n w. Washington, a. c.

UNITED STATES PATENT OFFICE.

JOHN THOMAS JONES, OF UIIOA, NE? YORK.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 255,296, dated March-21, 1882.

Application filed March 22, 1881. (No model.)

To all whom it may concern:

Beit known that I, JOHN THOMAS JoNEs, of Utica, in the county of Oneida and State of New York, have invented an Improvement in Sewing-Machines, of which the following is a specification. I

Sewing-machine shuttles have been moved by a swinging arm, that gives to the shuttle an accelerated and retarded movement, and the feed-regulating device. has been placed at the base of the stationary head or arm of the machine and swung up or down and clamped, as in my Patent No. 117,640, and the take-up has had a spring-eye moving up and down with the needle-bar.

My present invention relates to a peculiar feed-regulating device that is more easily constructed and less liable to wear loose than the devices heretofore employed; also, to a link shuttle-carrier pivoted to two swinging arms, so that the shuttle is carried reliably through v the loop of needle-thread, and the heel of the shuttle is raised'and the loop of needle-thread draws freely off it, and at the same time the shuttle-thread is drawn up in the line of the shuttle, and there is no tendency to displace the shuttle by drawing theheel up against the under side of the throat-plate, as heretofore. I also employ a peculiar pivoted shuttle-lever, that forms the rear endof the shuttle-carrier and prevents the shuttle from rising out of the carrier, and it is used to lift the end of the shuttle as it is liberated, so that it can be removed. Upon the needlebar thereis a springcushion, which relieves sudden strain upon the thread and controls the same, and also holds the thread away from the needle-point as the latter descends.

In the drawings, Figure l is an inverted plan of the machine. Fig. 2 is an elevation of the needle-bar and head of the machine and a section of the bed at the line 0000, Fig. 1. Fig. 3 is an elevation of the shuttle and its arms, the bed being in section atg y.- In said Fig. 3 the parts that are to the right of the dotted line a a are shown in Fig. 3. Fig. 4 is a plan of the shuttle-carrier, and Fig. 5 is a vertical section of part of the vertical arm, showing also thefeed-regulating mechanism. Fig. 6 is a section at the line 2 z, Fig. 5; and Fig. 7 is a section of the spring-cushion onthe needle-bar in larger size.

The beda of the machine, the hollow arm I), that rises above the table and terminates as a head, 0, the main rotating shaft ti and fly-wheel, the needle-bar c and its actuating mechanism, and the presser-foot-f are to be of any usual or desired character, so long as these parts are adapted to myimprovements hereinafter set forth.

Upon the main shaft at there is a crank or eccentric, with connecting-rod d to the crankarm g of the rock-shaft g, which shaft 9 is in bearings 2 2, below the bed a. Near the end of the shaft g, next the needle, is an arm, h, and to its upper end is pivoted, at 4, one end of the shuttle carrying link h, and the other end is hinged at 14c to the arm 7L2, which is pivoted at 3 tola bracket at. the under side of the bed.

The shuttle k is of ordinaryconstruction, and it rests upon the fingers 5 and 6, that projectfrom the face of the link it; and 7 is a finger coming above the shuttle nearits nose or front end. The heel or back end of the shuttle is received into the recessed end of the lever l,

which lever i has the screw 14 for its pivot,

venience of moving such lever by the finger, and when the lever is turned into the position.

shown by dotted lines, Fig. 3, the sp'ringi is in a slot or opening behind the heel, and the concave shuttle'holding end is raised to lift and liberate the shuttle.

The shuttle-face runs against the vertical face I of theraceway, and by reference to Figs. 2 and 3 it will be seen that the link shuttlecarrier h does not move in the arc of acircle,

as it would do if it were moved by the arm h only. Neither does it remain parallel to the surface of the bed, as it would if the arms h and h were parallel, but the shuttle is carried upwardly as it enters the loop of needle-thread, and it is parallel, or nearly so, to the bed when the loop of thread is about midway of the'shuttle, and after this the rear end of the shuttle is kept up nearthe surface of the bed, and the point of the shuttle is carried downwardly. Jfhiscansesthe sh nttlc to stand in line,or nearly so, with its thread, that passes to the fabric. Hence the shuttle-thread receives tension in the proper direction as the stitch is drawn up. Besides this, the crank-motions that actupon tbe rock-shaft give to same and to the shuttle a rapid movement when the shuttle is passing through the loop of needle-thread and a retarded movement at the ends of the stroke. Hence the strain upon the thread and the concussion of the shuttle in the shuttle-driver will be but little, and the machine is rendered durable, and the risk of breaking the thread is lessened.

To still further lessen the risk of breaking the threads and insure the more perfect control thereof, I make use ofa spring-cushion, 0, at the npperend of theneedle-bar. Thisspringcushion is at the end of the arm 0, and itisin the form of a grooved cushion or saddle resting upon a helical spring within a. hollow slotted case, as seen in larger size in Fig. 7. There is a spring, 0 resting upon the top of the slotted hollow case, that retains the thread in place after it has been sprung in beneath it.

It will be understood that the thread passes beneath the guide 10, over the tension device 11, through the eye of the ordinary take-uplover 12, thence over the cushion o, and down directly to the needle-eye. By this arrangement of thread-regulating devices, the cushion n being located at the place where there is a bend in the thread before it passes straight,

or nearly so, to the needle, said cushion yields and prevents undue strain or friction on the thread during the rapid movements to which it is subjected, and the cushion compensates any unequal action in the other parts and keeps upon the thread the tension necessary to prevent the needle-point catching and split-- ting the thread as it descends.

By employing a screw to adjust the tension of the spring of the cushion the action of said cushion in controlling the thread may be varied.

The fced-bar n is pressed downwardly by a spring, as usual, and it is pressed upwardly by the bent lever a, pivoted at20, Fig. 3, and acted upon by a cam upon the hub of the rockshat't arm It, so as to strike the feed upwardly against the fabric at the proper time. The end motion is given to the feedbar by the rockshaft m with a finger that enters a notch in said feed-bar, as shown in Fig. 3.

At the other endof the rock-shaft at there is a crank arm and a link, 1;, to the vertical link q, that extends up to a crank or eccentric upon the main shaft d. (See Fig. 5.) The pin 25 forms the pivot or hinge that connects the links 1; and q, and this pin projects from a block, 0, that slides in a groove in the hub s. This hubs is pivoted upon a pin,s,thatpasses into the bracket t at the lower end of the hollow arm I), and from this hub there is a leverarm, 1;, that passes through a segmental slot in the side of the hollow arm b, and thereis a nut, 21, on the screwthreaded end of this arm n,

which clamps against the face of the arm I) to hold the parts in any position in which they may be placed.

It the hub s is turned by the lever t and held so that its slotis verticalor nearly in line with the link q, then the block r will go up or ('lownin the slot in the hub s and will give but little end motion to the link but when the teed-regulating lever a is moved the other way, so as to bring the slot of the hub diagonally to the endwise movement of the link then thelink p receives nearly thesame amount of end motion, and the feed movement is the greatest.

The feedregulating lever t can be moved and clamped at the place that will produce the desired feed movement; and I remark that in consequence of the hub 8 being upon a bracket from the arm 1), instead of being upon the bed a, as in my Patent No. 117,640, the parts can be properly made and put into place before the arm 0 is screwed to the bed a,thus not only facilitating the construction of the machine, but also insuring the proper operation of the feed'regulating mechanism.

I am aware that the shuttle-driver has been upon a link between a swinging arm and arevolving crank. \Vith my improvement the thread is pulled up at an inclination to the bed, and the shuttle swings back and forth in the same path, instead of describing an ellipse.

I claim as my invention 1. Theoombination,in.asewing-lnachine, of the stationary hollow arm I), having brackets t, that project down through the bed a, the links 1) and q, hinged together, the rock-shaftm, and feed-bar a, the block 1', grooved hub 8, arm a, and pivot s in the bracket t for the hub a, substantially as set forth.

2. The combination, in a sewing-machine, of the shuttle-link it, having supports for the shuttle, with the arm h pivoted at 3, the arm h, rock-shaft g, and mechanism for giving motion to the rock-shaft, substantially as set forth.

3. The combination, with the arm 7L2, rockshaft g, and arm h, of a shuttle -link, It, having fingers 5 and 7 to receive the nose of the shuttle, and the lever l, pivoted at 14, and recessed for receiving the heel of the shuttle, and a spring to retain the lever l in position, substantially as set forth.

4. The combination, with the needle-bar and needle in a sewing-machine, of a thread-tension, the take-up lever 12, having a positive movement, and the spring cushioning device 0, the parts being arranged substantially as specified, so that the thread passes from the controller 12 over the cushioning device, and then directly to the needle, for the purposes set forth.

Signed by me this 7th day of March, A. D.

J. THOS. JONES. Witnesses:

WM, TOWNSEND, Geo. W. BEST.

ECO

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