US884579A - Sewing-machine. - Google Patents

Description

PATENTED APR. 14, 1908,

-r. C. GOODWIN.

SEWINGMAGHINE. APPLICATION FILED SIIPT.14,.1905.k

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J. C. GOODWIN.' SEWING MACHINE. ArPLIoATIoN FILED SEPT. 14. 1965.

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` Arronufr JULIUS O. GOODWIN, OF PHILADELPHIA, PENNSYLVANIA.

SE WING-MACHINE.

Application iiled September 14, 1905.

Specification of Letters Patent.

Patented April 14, 1908.

Serial No. 278,428.

To all whom it may concern.'

Be it known that I, JULiUs C. GOODWIN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a specification.

My invention relates to improvements in that class of sewing -machines employed in the manufacture ofshirts, overalls and underwear and is particularly adapted to the hemming of sleeves and like portions of a garment which cannot be satisfactorily stitched by machines of the ordinary household type.

My lnvention embodies details of construction which enables the machine to be run at a high rate of speed with freedom from noise and vibration common to this class of machines. Y

My invention will be more fully understood by reference to the accompanying drawings forming part of this speciiication and wherein:

Figure 1 illustrates a side elevation of a machine constructed in accordance with my invention. Fig. 2 re resents a longitudinal section of the same ta en on a line 2 2 as indicated in Fig. 1. Fig. 2 represents a detached plan view of a portion of the machine showin the arrangement of the throat-plate. Fig. 3 shows a front elevation of the machine. Fig. 4 illustrates a detached perspective view ofthe loo er slide and loopers, and Fig. 5 shows a etached erspective view of the feed-bar and the belicrank lever and connections for raising and lowering the same. Fi 5 shows a slightly modified form of be crank-lever, the view otherwise being the same as Fig. 5.

Referring now to the reference letters of the drawings, A denotes the base of the machine which is provided with bearing A1, A1, to receive a driving shaft B. This driving shaft is furnished with a hand wheel B1, a grooved ulley B2, and a number of eccentrics B3, B4, B5, B6 and B7 from which motion is obtained to operate the various parts of the machine in a manner hereinafter described.

The base of the machine has projecting upward and outwardirom it a curved arm A, which is provided with bearings A3, A3, for the reception ofa needle bar C, and bearings A, A, to receive a presser-bar D. The

base has also projecting outward from it dircctly under the arm vA2 another arm A3, which. is hollowed out to receive the lower stitch formingl mechanism and is provided at or near its free end with a throat plate A4.

The upper stitch forming mechanism is controlled by the eccentric B3, through the following line of connections. On the said eccentric is a ring C1, upon which is fulcrumed the forked end of a lever O2, which projects upward and is provided with a bearing C3, forming a socket for the ball end of the lever O4. The last mentioned lever is connected to a longitudinal shaft C5 fitted to bearings b5, b5, on the arm A2, which shaft is provided at its forward end with a lever O, connected to a link O7, and this in turn'is pivoted to the side of a collar CS, mounted upon the needle bar C, containing two needles c and c1. The presser bar I), is provided with the conventional presser foot D1, which is normally held down by means of a leaf spring S, one end of which is fastened by a screw d, to a lug d1, on the arm A2, while theother end bears upon a lug d2 on the presser bar D. The pressure of the spring S upon the presser bar may be increased or diminished by means of a set screw D2, which is threaded in a lug d3, on the machine and bears upon the spring. The presser bar and its parts may be raised at will by means of a cam D3, which as shown in Fig. l of the drawin s is secured upon the presser bar by means of a pin d3. The goods upon which a seam is to be stitched is fed forward over the arm A3, by means of afeed plate E, which is controlled by the two cams B and B7 the former of which imparts a forward and backward movement to the feed plate while the latter raises and lowers the same and consequently brings the teeth of the plate into and out of contact with the fabric to be acted upon.

The feed plate E, is connected to or as shown in Figs. 1 and 2 may form a part of a bar E1, which for the purpose of adjusting the longitudinal movement of said feed plate is connected to the upper end of a segment E2, which has its lower end fulcrumed to the frame of the machine at a point c3. The segment E2 is provided with a slot e2 to receive a stud E5, which holds the segment in working engagement with an eccentric rod E4, op

erated upon by the eccentric B6. The rais'- ing and lowering of the feed plate as before stated is controlled by the eccentric B7, which is operatively connected to one end of an eccentric lever E5, Whose opposite end is fulcrurned to the short arm of a bell crank lever E, which has a bearing in the arm A3 and by means of links e, c, has its long arm connected to the feed plate E. The looper F, which forms the essential feature of the lower stitch forining mechanism, constitutes a bell crank F1 provided with needle like loopersj, f, which as is Well known in the art intercept the loops brought down and formed upon the needles c and c1. The bell crank F1 ofthe looper F, is mounted upon a slide F2, by a screw f1, which forms its fulcrum and the bell crank is operated by having the arm f2 fulcrumed to an eccentric rod F, which in turn is fulcrumed at a pointj'i* to an eccentric strap F4 controlled by the cam B5. The slide F2, is guided in a slot a4, in the forward end of the arm A3, and is operated from the eccentric B4 by an eccentric lever F5, which is operatively connectedl to the slide by a screw Having described my invention what I claim and desire to secure by Letters Patent 1. A sewing machine comprising a main shaft, a feed bar, a segment fulcrumed at one end to the machlne frame and connected at its other end to the feed bar, an eccentric7 an feed bar and the machine frame for varying the stroke of the feed bar, a bell crank lever having one of its arms connected to the feed bar, and a horizontally reciprocating rod connected to the other arm of the bell crank lever, whereby motion is imparted to the bell crank lever for raising and lowering the feed bar.

A sewing machine comprising a main shaft, a horizontally reciprocating feed bar, a segment fulcrumed at one end to the machine frame and connected at its other end to the feed bar, an eccentric, an eccentric rod adjustably secured to the segment intermediate its connections with the feed bar and the machine frame for varying the stroke of the feed bar, a bell crank lever having one of its arms connected to the feed bar, a horizontally reciprocating rod connected t0 the other arm of the bell crank lever, whereby motion is imparted to the bell crank lever for raising and lowering the feed bar, and a casing for all of said parts having an opening therein through which access may be had for adjusting the eccentric rod.

In testimony whereof I aflix my signature in presence of two witnesses.

JULIUS C. GOODWIN.

Witnesses:

ARNOLD KATZ, NORMAN W. ELLIOTT.

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