US851734A - Take-up for sewing-machines. - Google Patents

Description

PATENTED APR. 30, 1907.

- J. DIBHL.

TAKE-UP FOR SEWING MACHINES.

APPLICATION FILE D MAY 8, 1897.

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No. 851,734. PATENTED APR. 30, 1907. J. DIEHL. TAKE-UP FOR SEWING MACHINES.

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UNITED STATES P TENr orroE.

JACOB DIEHL, or CLEVELAND, CHI AssICNoN 'ro THE STANDARD SEWING MACHINE COMPANY, or CLEVELAND, 01-110, A CORPORATION oE OHIO.

TAKE-UP FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented. April 30, 1907.

Application filed May 8, 1897. Serial No. 635,639.

To rtZZ whom, it may concern:

Be it known that 1, JACOB DIEHL, a citizen of the United States, and a resident of Cleveland, Cuyahoga county, State of Ohio, have invented new and useful Improvements in Take-Ups for Sewing-Machines, of which the following description, taken in connection with the drawings herewith accompanying, is a specification.

This invention relates to sewing machines, and more particularly to the take-up and thread controlling devices embodied in such machines.

The principal object of the invention is to improve such devices so as to render both of the same positive in their action; thereby insuring their proper and regular operation in sewing at a high rate of speed, and further, to regulate their time and direction of movement relative to each other and to the looper and needle, whereby the strain and frictional wear upon the thread, caused by the action of such parts thereon, will be reduced to a minimum. This object I secure by means of the construction and combination of parts embodying my invention as hereinafter set forth in detail and pointed out in the claims.

Referring to the drawings: Figure 1, represents a side elevation of the front end of a sewing machine embodying my invention, part of the arm being broken away to show the parts supported therein. Fig. 2, is a front end elevation of the machine. Figs. 3, 4, 5, and 6, are front elevations of the machine with the face-plate removed and the casting partly in section, showing the relative positions of the take-up, thread-controller, needle, and looper, with certain of the operating parts, at different times during the operation of the same, and Fig. 7, illustrates perspective views of certain of the parts of be hereinafter referred to.

To explain in detail: a represents the bedplate of the machine, a the overhanging c rm thereof, a, and a the needle and presser bars respectively, b the rotating driving shaft suported in suitable bearings in the arm a, and h the crank secured on the front end of said shaft and having operative connection with the needle-bar to operate the same, through the medium of a connecting pitman 6 The above parts, as described, are of usual construction.

According to my present invention, 1 have ated to slide upon the needle-bar independently thereof to give its thread-engaging arm 0 a vertically reciprocating movement in proper time to give down and draw up the thread at each stitch, from the said crank b through the medium of a connecting link I), which latter is pivotally connected at one with the said sleeve 0 and at its opposite end with a rigidly connected arm I) of the crank I). Said arm 6*, in the present instance and as more clearly shown in Fig. 7, is connected with the crank so as to be movable therewith, by means of a squared end I) on the crankpin which is entered into a like-shaped opening b in the arm I), but any other suitable form of connection may be employed between the parts or the same be formed integral with each other, without departure from my invention.

The pitman connects at its lower end with a pin (Z which is secured upon a collar or block d having a fixed connection with the needle-bar. Said block (1, in the present instance, is formed with a lateral extension (Z arranged with its end projecting into a vertically arranged groove (1 located in the inner Wall of the arm a, in which it travels when the needle-bar is operated so as to prevent the latter from turning in its bearings. The said extension (I of the block (1 also serves, according to my present invention, as a means to support the pitman connecting pin d in a position at one side of the center of the needle-bar as shown, in lieu of in a position central therewith as heretofore. The pin a being thus supported at one side of, or eccen'trically to, the needle-bar, changes the time of movement of the needle bar relative to the looper so that the dill'erential movement of the latter is greatly lessened; thus adapting the machine to be run at a higher rate of speed with greater ease and with less jar and strain upon the operating parts. The change in time of movement to the needlebar thus secured also better adapts the same for its co-operation with the take-up and thread'controller as will be hereinafter described.

The pin d with which the pitman connects, as herein illustrated, has a laterally adjustable connection with the block d in a direction toward and away from the needle-bar,

whereby it may be adjusted to regulate the action of the latter relative to the looper and to a threadcontroller to be hereinafter referred to, by means of a longitudinal slot (Z in the extension of said block in which the pin may be moved, and in which it is adapted to 'be secured in a stationary adjustable position by means of a fastening screw (1 Any other suitable construction may however be employed to secure such adjustment of the pin, or the latter may be cast integral with .the block, without departure from the invention.

In the operation of the take-up, after it has drawn up the needle thread loop to complete the stitch, it then begins to descend to give down the required thread for the formation of the next stitch, and during such downward movement of the take-up and before the needle has entered the work, a certain amount of slack thread is produced whichis necessary to be controlled or kepttaut until after the needlehas entered the work. Heretofore, thread controllers in the form of light springs have been employed for controlling such slack thread, but these, not being positive, have been found ineflicient when the machine is run at high rates of speed. To avoid such objection, I have provided a positively acting controller for co-operating with the take-up in handling the slack thread.

According to my invention and as a simple and convenient embodiment of the same, I have provided a vertically arranged lever e which is pivotally supported at its upper end on a lug e on the inner wall of the arm a, and rovided at its lower end with an outwar y turned extension 6 which latter forms the controller proper and projects outwardly through an elongated slot e in the face-plate as shown in Figs. 1 and 2. Such extension at a point outside of the face-plate is provided with an eye 6 therein through which the thread is adapted to be passed.

The controller lever, e is operated to give its lower thread engaging end 6 a vibrating movement in a direction substantially at right angles to the path of movement of the vertically reciprocating takeup, and to and from a position in the line of draft of the thread between the take-up and needle, so as to control the slack thread in a manner as will hereinafter be described, as follows: The needle-bar operating pitman b is provided with a fixed arm 6 having a pin or screw 6 at its outer end which extends and operates within a cam slot e" formed in the said controller lever e. The said arm 0 of the pitman W, as herein shown, projects from the latter at a point adjacent to its connection with the pin (1, whereby the operating end of such arm will be vibrated by the pitman in a direction as though pivoted upon said pin (Z,

movement to the controller lever e. The particular location however of the arm 6 upon the pitman 6 may be more or less changed, or other suitable means for securing operative connect-ion between the pitman and the controller lever be employed, without departure-from my invention' The operation of the machine embodying the construction as above set forth, is as follows: In threading the machine, the thread is passed from the spool or other thread supply throiwh suitable guides f, f, on the faceplate of the machine, to the tension device f, and from the latter through a guidef located in the line of draft of the thread in passing between the take-up and the needle, and from thence up through the eye e in the controller to the take-up, and from the latter down again through the controller and the guide f to the needle, all as clearly shown in Fig. 2. After the machine has been thus properly threaded and the take-up-is in a position at the limit of its upward stroke, as shown in Figs. 1, 2, and 3, the controller e is in a position in the line of draft of the thread between the said take-up and the needle as shown. Now, starting the machine with the parts in such position, the take-up and needle begin to descend and simultaneously therewith the controller begins to move toward the right in proper time to control the slack thread given down by the take-up. The controller continues to move in such directionto keep the thread substantiallytaut until the take-up and needle have reached their lowest point and the point it of the looper h is about to enter the thread thrown out by the needle, as shown in Fig. 4. At this time, as the said looper enters the thread loop and begins to draw down upon the same, the controller also begins its return move ment from its outward limit of movement as shown in Fig. 4, in proper time to supply the thread to the looper as indicated by the relative movements of the same as shown in Figs. 5 and 6. During such time as the looper is taking down the thread loop to a position to be cast off, and the controller is being returned to its normal starting position to give down the slack thread controlled thereby to the looper, as shown in Fi s. 5 and 6, the take-up remains substantiafiy stationary as shown. This timing of the take-up is secured, in the present instance illustrated, by reason of the point of pivotal connection between the take-up sleeve 0 and the connecting link 6 being brought to a position almost coincident with the axis of the crank 12 upon and communicate such positive vibrating ICC the downward movement of the take-up, whereby, during the movement of the crank from the position shown in Fig. 4 to that in Fig. 6 in operating the controller, the crank 1) moves the outer end of the link or pitman 5 without causing the same to communicate but slight movement to the take up as shown.

After the parts have assumed the position shown in Fig. 6, a continued action of the machine causes the controller to be moved into a position in the line of draft of the thread between the take-up and needle; the looper to cast off the thread loop; and the take-up to move upward to its original position, as shown in Figs. 1, 2, and 3, to draw up the thread loop into the work and complete the stitch. The take-up being supported upon the needle-bar as described, is guided thereon to move in a straight vertical line whereby it will have a direct pull upon the thread in drawing up the stitch; and the controller acting upon the thread only when it is placed in a slack condition at the downward movement of the take-up, and giving it to the looper in a substantially slack condition as required thereby, and then returning to its normal position in the line of draft of the thread so as not to engage or interfere with the latter when being drawn up by the take-up, all tend to secure the proper handling and controlling of the thread when the machine is run at high rates of speed, without undue wear or strain thereon, the advantage of which will be obvious.

Having thus illustrated and described one practical embodiment of my invention, it will be obvious that the construction and arrangement of the several parts may be more or less materially modified, or the takeup and controller be applied 'to a reciprocating shuttle or other machine different from the rotary shuttle machine herein shown,

Without departing from the spirit of my in- I vention.

WVhat I claim as new and desire to secure by Letters Patent of the United States is, 1. In a sewing machine, the combination,

with the needle-bar, of a reciprocating takeup having a movement independent of that of the needle-bar, means guiding said takeup in a path substantially parallel with the path of the needle-bar, a vibrating threadcontroller movable in a direction substantially at right angles to the movement of the take-up and to and from a position in the line of draft of the thread between the take-up and needle, and means independent of the needle-bar for operating said controller positively.

2. In a sewing machine, the combination, with the needle-bar, of a vertically reciproeating take-up having a movement independent of that of the needle-bar and being supported and guided thereon, a pivoted vibrating thread-controller movable in a direction substantially at right angles to the movement of the take-up, and means independent of the needle-bar for operating the said takeup and controller.

3. In a sewing machine, the combination, with the needle-bar, of a rotating shaft having a crank, and a take-up and a thread-controller each having an operative connection with said crank and being actuated thereby independent of the needle-bar.

4. In a sewing machine, the combination, with the needle-bar, of a rotating shaft having a crank, and a take-up and a thread-eontroller each having an operative connection with said crank through the medium of a pitman and being positively actuated thereby independent of the needle-bar.

5. In a sewing machine, the combination, with the needle-bar, and a reciprocating take-up mounted to slide and operate thereon, of a rotating shaft having a crank, the latter being provided with a fixed angular arm or extension having an operative connection with the take-up, for the purpose set forth.

JACOB DIEHL.

WVitnesses Guns. 0. EMMONS W. O. TALMAGE.

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