US464480A - pearsoh - Google Patents

Description

(No Model.) 2 sheets-sheet v1.

M. H. PEARSON.

FBEDING MEGHANISM POR SEWING MAGHINES.

No. 464,480. Patented Deo. l, 1891.

MARSHALL HENRY PEA/e5 oN,

2 Sheets-Sheel 2.

(No Model.)

M. H. PEARSON. FEEDING MEGHANISM POR SEWING MACHINES.

No. 464,480. Patented Dec. 1, 1891.

o., muro-nwo., wAsHmemn, n. c.

UNITED STATES PATENT OEETCE.V

MARSHALL HENRY PEARSON, OF LEIOESTER, ENGLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE JOHN OELAHERTY COMPANY, OF

MONTREAL, CANADA.

FEEDING IVIECHANISIVIv FOR SEWING-MACHINS.

SPECIFICATION forming part of Letters Patent No. 464,480, dated December 1, 1891.

Original application filed January 13, 1891, Serial No. 377,595. Divided and this application tiled August 28, 1891. -Serial No.V 403,979. (No model.) Patented in England June 28,1889,N0. 10,481.

To a/ZZ whom it may concern:

Be it known that I, MARSHALL HENRY PEARsON, mechanical engineer, a citizen of England, residing at Leicester, in the county of Leicester and Kingdom of England, have invented certain new and useful Improvements in Sewing-Machines, (for whichI have received British Letters Patent No. 10,481, dated June 28, 1889,) of which the following is a specification.

This invention relates to a novel arrangement of Wax-thread sewing-machines for making whatjs known as the lock-stitch, but parts thereof are applicable to machines usinga plain or unwaxed thread. In this machine the awl or piercing-tool is used as a feeder, and it is mounted on the end of a lever capable of receiving a compound motion, the awl being arranged below the work While the needle is over the work. The work to be sewed is held down by the presser-foot,

Y and as the awl rises it pierces a hole, and when it has reached its highest point it is movedl backward for feeding purposes. The shuttle, which has a reciprocating motion imparted to it through a pendulum-lever and connecting-rod through one of the grooves in the camp'late, is also arranged below the Work, and is so threaded that it will draw its thread prior to entering the loop instead of after- Ward, as is usual. The presser-foot is secured to the lower end of a round bar sliding in suitable guides in the bracket-arm, and is pressed down by a curved spring also attached to the arm of the machine. To the arm of the machine is also fixed the wax-pot (and water-reservoir) through which the needle-thread in passing through it is supplied with liquid wax. The thread-lever over which the thread passes from the bobbin to the needle is pivoted to the arm of the machine and depressed by a cam-piece xed to the upper end of the needle-bar and returned to its normal position by means of a spiral or other spring. The thread-lever is also arranged to draw off the requisite amount of thread from the bobbin according to the thickness of the material operated upon. The thread led from a. bobbin on the bracket-arm passes into the Wax-pot Without any tension, so as to be capable of receiving the greatest amount of wax before itpasses between the tension-plates arranged Within the pot and on leaving the Wax-pot passes through an india-rubber packing in a stuffing-box.

In the drawings, Figure 1 is a front end View, partly in section; Fig. 2, a rear endview;

Fig. 3, a plan view, partly in section, of the awl-lever and its support and actuating-cam and Fig. 4. a face view of my improved machine with the main actuating-cam removed.

A A is the main framing of the machine, cast, preferably,in one piece, and of a D form, one limb forming the base of the machine and the other limb the horizontal bracketarm.

B is the cam-shaft turning in bearings() b of the main framing. On the cam-shaft is keyed the aWl-cam E and the band-pulley F.

G is the oscillatin g awl-lever pivoted to the vertical rocking fulcrum-post g5, and tted with clamps g,.in which the awl g is adjustably mounted for piercing and for feeding for- Ward the Work. Y

G is the stitch regulator or cam, of circular form, so mounted upon the base of the main framing that an arm G2 (projecting from the fulcrum-post g5, to which the oscillating lever G is connected) is made to strike it. The oscillating lever G, which carries the awl g', is pivoted at g4 out of center to a vertical support g5, (hereinafter termed the fulcrumpost,) and is armed at its rear end With a runner Q7, which Works in a groove eX in the cam E, as shown in Fig. 3. The runner is fixed to a pin Q14, projecting from the end o6 of the lever, and when 'the end of the lever is deof the awl is effected by pivoting the lever G l to the vertical rocking fulcrurn-post g5, (which is supported by studs g8 gg, mounted in the bearings glo g, the lower stud g9 being capable of adjustment by means of a set-screw 912,

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mounted in the end of a lower lug gli) and causing the end of pin g1" to be pressed by means of a spring gli against the face of a cam e, formed in the groove of the cam E, as shown at Figs. 3 and et, rIhe amount of feed and also the length of the stitch is regulated by means of the regulator or stop-piece G, mounted on a pin fixed to the main framing of the machine, so as to be capable of being rotated by hand, as required. On the face of the circular piece G are numbers corresponding, in the course of asingle revolution, with the distances between the smallest or largest number of stitches per inch to be formedthat is to say, if the number of stitches vary from four to twelve or eight to sixteen stitches per inch then the numbers 4t to l2 or 8 to 16 will be marked on its face, as shown. Il, say, ten stitches per inch were required to be sewed, then the center screw would be loosened and the index turned round till the 1Q is opposite a pointer or marker gm, iiXed to the fra-ming of the machine, as shown in Figs. l and On the back of the circular piece G is arranged one or more cam or cams g, decreasingr about one-sixteenth of an inch in thickness for the largest to the smallest number of stitches per inch to be sewed. IVhen the required number on the dial is reached, the circular piece is fixed in position by tightening the center screw. Against the face of the cam or cams g1T the end of alever or arm G2 (which may or may not be armed with an adjusting or correcting` screw G3) projects from the fulerum-post (5, to which the awl-lever is pivoted, as shown in Fig. 3. By this means the traverse of the awl and the length of the stitches may be varied as required. The needle is timed to follow the awl point to point until the latter is below the Work, when the awl is returned by the means described to its normal position, the

needle meanwhile continu ing its descent to its lowest point and then rising to form the loop in the usual manner, through which the shuttle passes.

This application is a division of an application led by me January 13, 1891, Serial No. 377,595, and all features not specifically claimed herein are reserved for said original application.

I'Iavin g th ns described my invention, what I claim isl. In a sewing-machine, the combination, with a shaft B and a compound cam E, of an awl-lever G, provided at one end with an awl and at the other end with astud to engage the cam and adapted to rock laterally and vertically, an arm G2, and a cam g1?, to act upon the arm and thereby regulate the horizontal movement or feed of the awl-lever.

2. In a sewing-machine, the combination, with the awl-lever G and means for giving it the compound movement described, of a pointer secured to the frame of the machine and a graduated cam also secured to the f rame of the machine and adapted to regulate the lateral movement of the awl-lever.

3. In combination with shaft B and cam E, awllever G, provided at one end with an awl g and at the other end with a stud to engage the cam, a rocking support g5, carrying an arm G2, and a stud g4, upon which latter the lever rocks vertically, and a cam Q17 to act upon the arm In witness whereof I hereunto set my hand in the presence of two witnesses.

MARSHALL HENRY IEARSON.

lVitnesses:

JOSEPH HARVEY, Notary, Leicester.

STEPHEN PEAKE, 16 Amt Street, Leicester, Solicita/"s C'Zcrkf

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