US1029887A - Sewing-machine. - Google Patents

Description

M. H. PEARSON.

SEWING MACHINE.

APYPLIOATION FILED AUG.4, 1909.

Patented June 18, 1912.

2 SHEETS-SHEET 1.

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COLUMBIA PLANOGRAPH (20., WASHINGTON, D. c

M. H. PEARSON.

' SEWING MACHINE.

APPLICATION FILED AUG.4,1909. 1,029,887.

2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

Patented June 18, 1912.

tinrrnn STATES PATENT orrrcn MARSHALL HENRY PEARSON, OF LEICESTER, ENGLAND, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

To all whom it may concern Be it known that I, MARSHALL HENRY PEARSON, a subject of the King of Great Britain, residing at Leicester, in the county of Leicester, England, have invented certain new and useful Improvements in Sewingli Iachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to sewing machines and particularly to lock-stitch wax-thread sewing machines which employ an eye-pointed needle.

The object of the present invention is to improve the construct-ion and arrangement of the thread handling devices of machines of the class above referred to so that the needle thread can be pulled through the eye of the needle more readily and with less liability of stripping the wax from the thread.

With the above object in view, the invention consists in the devices, combinations and arrangements of parts hereinafter de scribed and claimed.

The present invention will be clearly understood from an inspection of the accompanying drawings in which- Figure 1 is a sectional front elevation of a machine embodying the same in its preferred form, so much only of the machine being shown as is necessary to show the connection of the present invention therewith. Fig. 2 is a detail plan view illustrating the relative arrangement of the eye-pointed needle, shuttle and thread deflector. Fig. 3 is a detail end view illustrating the relative position of the parts shown in Fig. 2 and Fig. 1 is a view similar to Fig. 3 with the parts in a different position illustrating the manner in which the thread is pulled through the eye of the needle by the shuttle.

The machine illustrated in the drawings is a straight eye-pointed needle machine designed particularly. for sewing harness with wax thread. In addition to the eye-pointed needle and its actuating mechanism, the parts illustrated in the drawings are a shuttle, a bobbin carried by the shuttle, a deflector for moving sidewise one side of the loop of thread forced through the work by the needle and mechanism for actuating the shuttle and deflector.

The eye-pointed needle is indicated at 1 Specification of Letters Patent.

Application filed August 4, 1909.

end of a shuttle driving shaft 12.

SEWING-MACHINE.

Patented June 18, 1912.

Serial No. 511,215.

and is secured to a vertically arranged needle bar 2 which is actuated in a manner common to eye-pointed needle sewing machines by a crank pin 3 engaging a cam slot in a block 4 secured to the needle bar. The crank pin 3 projects from the face of a disk 5 which is secured to the driving shaft 6 of the machine.

The shuttle, indicated at 7 is or may be of the well-known discoidal type and is provided with a central cylindrical chamber containing the bobbin 8 which holds the locking thread. The bobbin is mounted to turn on a stud 9 projecting from one wall of the shuttle. For a portion of its periphery the shuttle is cut away as indicated at 10 to receive the shuttle driver of usual construction which projects from adisk 11 on one The shaft 12 is rotated alternately in opposite directions at the proper times during the operation of the machine to impart an oscil lating movement to the shuttle by means of a toothed segment 13 which meshes with a "pinion 14 on the rear end of the shaft 12.

The toothed segment 13 is carried at the lower end of an arm 15 pivoted at its upper end on the machine frame. From the hub of the arm 15, an arm 16 extends upwardly and carries a roll which engages a groove in the face of the driving pulley 17 on the main shaft of the machine.

The deflector which engages one side of the loop of thread forcedthrough the work by the needle and moves the loop sidewise into a position to be engaged by the beak 18 of the shuttle, has the form of a hook 19 as best shown in Fig. 2. The hook 19 is arranged to reciprocate below the work plate 20 of the machine and is secured to the front end of a slide bar 21. This slide bar is pivotally connected at its rear end to the lower end of a lever 22, the upper end of which carries a roll engaging a groove in a cam 23 secured to the main driving shaft.

The eye of the needle is indicated at 2 1 and extends through the needle in a direction parallel to the plane in which the shuttle operates. In the machine shown in the drawing this direction is also the direction in which the work is fed so that the needle eye is not only arranged to cooperate to the best advantage with the shuttle but is also arranged in the position necessary for the production of the correct harness stitch.

The manner in which the devices illustrated in the drawings operate in the formation of a stitch will be clearly apparent from an inspection of Figs. 2, 3 and 4. The deflector hook l9 advances from the position illustrated in Fig. 2 to a position in which the end of the hook is on the opposite side of the needle and the needle advancesthrough the work. The needle thread now leads from the work down along the needle, through the needle eye and upwardly along the needle through the work to the supply. The'loop of needle thread thus formed lies in a plane parallel to the plane in which the shuttle operates. The needle now rises slightly as is common in eye-pointed needle machines, and a loop of thread is thrown outwardly from the needle into a position to be engaged by the deflector hook 19. The deflector hook now retracts drawing the needle thread to one side so that the thread extending from the eye of the needle to the hook is in a position to be engaged by the beak 18 of the shuttle. The shuttle now moves forward, the beak enters the loop of needle thread, and as the shuttle continues to rotate the needle thread is pulled through the eye of the needle, as indicated in Fig. 4. The pull of the needle thread is away from the needle and downwardly in substantially the direction in which the thread leads through the needle eye so that the thread is pulled easily through the needle eye. By pulling on the needle thread, as indicated in Fig. 4, the friction between the thread and the needle eye is reduced to a minimum and consequently the wax stripping action of the eye on the thread is also reduced to a minimum. The continued rotation of the shuttle causes the shuttle and the bobbin of locking thread contained therein, to pass completely through the loop of needle thread. The needle thread is then drawn up in the usual manner slipping over the shuttle and out of the hook 19 until the thread is drawn tightly against the work. 7

arranged to move the hook from one side of the needle path to the other While the needle is out of the work and to return the hook to original position after the needle has en-.

tered the work to thereby engage the loop of needle thread'and move it into a position to be engaged by the shuttle.

2. A sewing machine, having, in combination, an eye-pointed needle, a holder for the locking thread, a device moving in a plane substantially parallel to that of the loop of thread forced through the work by the me dle and arranged to engage the needle thread loop and pull thread from the supply through the needle eye in substantially the direction in which the thread leads through the eye and pass the loop thus formed around the locking thread holder a deflector hook, and mechanism for actuating the hook arranged to move the hook from one side of the needle path to the other while the needle is out of the work and to return the hook to original position after the needle-has entered the work to thereby engage the loop of needle thread and move it into a position to be engaged by the shuttle.

ARTHUR ERNEST JERRAM, ELEANOR PYWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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