US379175A - Thomas h - Google Patents

Description

(No Mbdel.)

T. H. MARTIN. SEWING MAUHINE.

No. 379,175. Pa-tented Mar. 6,1888.

Enron,

THOMAS H. MARTIN, OF LONDON, ENGLAND.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 379,175, dated March 6, 1888.

Application filed April 13, 1887. Serial No. 234,727. (No model.) Patented in England September 29, 1886, No. 12,369; in FranceDecemberQ, 1886, No. 180,203; in Germany December 14, 1886, No. 40,707; in Norway December-16, 1886, No. 200; in Belgium December 21, 1886, No. 75,673; in Sweden December 22, 1586, No. 1,000; in Spain March ll, 18:7, No. 6,623/10,514; in Victoria Apr-i127, 1887, No. 5,039; in Italy May 3, 1887, XLII, 300; in New South \Vales July 30, 1881', No. 2,115, and in Austria-Hungary September 15, 1887, No. 12,351 and No. 35,94.

.To a'ZZ whom it may concern:

Be it known that I, THOMAS HERBERT MAR TIN, a citizen of England, residing at George Street, in the cityof London, England, have invented a new and useful Improved Sewing Machine, (for which I have obtained patents in Great Britain, No. 12,369, dated September 29,1886,- in France, No. 180,203, dated Decem bar 9, 1886; in Belgium, No. 75,673, dated December 21,1886; in Germany, No. 40,797,

dated December 14, 1886; in Norway, No. 290, dated December 16, 1886; in Sweden, No. 1,009, dated December 22, 1886; in Spain, No. 6,623/l0,514, dated March 11, 1887; in Victoria, No. 5,089, dated April 27, 1887; in New South Wales, No. 2,115, dated July 30, 1887; in Austria-Hungary, No. 12,354 and No. 35,948, dated September 15,1887, and in'ltaly, No. 306, Vol. XLII, dated May 3, 1887,) of which the following is a specification.

This invention relates to acompact, simple,- and cheap construction of chain-stitch sewingmachine such as is represent-ed in the accompanying drawings;

Figure 1 is a side view. View. Fig. 3 is a plan. tive view of the machine.

The main frame consists of a back plate, A, with two projecting end pieces, a (1 at its lower part, and a projecting lug, a, at the top, the whole of this frame being preferably punched orstaniped and bentin one piece from sheet metal and secured to a rbase plate,-'B.

Fig. 2 is an end Fig. 4 is aperspec- To the lower part of the frameis fixed abracket, a, holding a pin which carries the thread reel 0. To give tension to the thread this reel can be made to revolve with moreor less friction by screwing or unscrewing a nut, 0, so as to compress more or less a spring, 0, which presses a washer against the end of the reel 0.

On the front end ofthe frame A is fitted, to slide up or down, the presser-foot D, which is pressed down by a blade-spring, d, and can be raised when required by applying the finger to a projecting horn, 01 The stem of the presser'foot has slotted holes through which pass two screws, d. A round vertical rod, b, is fixed at its upper end in the lug a and at its lower end in the base B.

The needle N is fixed by a set-screw, n, to the needle arm E. which is preferably punched or stamped and bent in one piece from sheet metal. It has two lugs, e and e, bent backward and bored to receive the rod 1), so that the needlearm can slide up and down the rod b and also turn round on it as an axis.

[ by which itis caused to revolve. The other end of the spindle F has fixed onitarevolving looper, G. The crank f is connected byalink, f, to a pin, e, which is screwed in a lug projecting forward from the needle-arm E.

Above the looper G is fixed on the bracket a the table '1, on which is laid the fabric to be sewed. The thread from the reel 0 being passed through guideholes and through the eye of the needle N, while the fabricis pressed on the table T by the presser-foot D, on turning the handlef and so causing the crankf the spindle F, and the looper G to revolve, the

' needle-arm E and needle N are caused to move up and down, and by the action of the cam f andspring 0* on the arm (2 the needle is also caused to move to and fro horizontally, moving, to the one hand while it is down in the fabric and to the opposite hand when it is up clear from the fabric. By the former movement of the needle the' fabric in which the needle is then engaged is advanced thelength ofa stitch at every stroke of the needlewhile the needle is down.

As in most casesit is unnecessary to provide for more than one length of stitch, the cam f may be fixed in one position on the spindle F. Should it be desired to provide for various lengths of stitch, the cam f may be made to shift longitudinally along the spindle F, so as to act on the arm a nearer to or farther from the axis 2), on which the needle arm oscillates, the horizontal feeding stroke of the needle being thus increased or diminished, as may be desired.

Having thus described the nature of my in vention and the best means I know for carrying the same into practical effect, I claim-- 1. The combination, in a sewingmachine, of

5 the back plate, A, having end pieces,al a",and

top lug, 1f, the vertical red I), the needle-arm E, adapted to rise and fall and swing axially 0n the said rod, a resser-foot, D, a looper, G,

and means for operating the needle'arm and I0 looper, substantially as described.

2. The combination, in a sewingmachine, of a supporting-frame, the vertical rod 1), the needle arm E, adapted to slide vertically and swing axially on said rod, the shaft F, having 15 the crank-handle f, the cam f on the shaft to swing the needle'arm, the link f, connecting the crank-handle with the needle-arm, the looper, and the resser-foot, substantially as described.

3. The combination, in asewing-machine, of a supporting-frame, a vertical rod, b, the needle-arm E, adapted to slide vertically and swing axially 0n the rod and having the arm e the spring e, acting on the needle-arm, the 25 shaft F, having the crank-handle f and the cam f, acting 011 the arm 0, the link f, connecting the crank-handle with the needle-arm, the looper, and the presser-foct, substantially as described.

4. Thecoinbination, in asewing-machine, 0f 0 a supporting frame, the vertical rod 1), the needle-arm E, having the upper and lower lugs e 6" adapted to rise and fall and swing axially 0n the red, the spring 0, the shaft F, having a crank-handle, f", and a cam, f, acting on the 35 needle-ar1n,a link, f. connecting the crankhandle with the needle-arm, the looper, and the presser-foot, substantially as described.

Tn testimony whereofl have signed my name to this specification, in the presence of two subscribing witnesses, this lSth day of March, A. D. 1887.

THOS. H. MARTIN.

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