US239189A

US239189A - Sewing-machine

Info

Publication number: US239189A
Authority: US
Publication date: 1881-03-22
Anticipated expiration: 1898-03-22

Description

(No Model.) 8 Sheets-Sheet 1.

r J. H. OSBORNE.-

Sewing-Machine.

No. 239,189.- Patented March 22,1881.

. 3 Sheets--Sheet 2.

J. H. OSBORNE. Sewing Machine.

(No Model.)

No.239,1s9.

Patented Mar ch 22, 1881.

3 Sheets-Sheet 3.

J. H. OSBORNE.

(No Model.)

Sewing Machine,

Patented March 22,1881.-

I II N-PEIERS FHOTQ-LITHOGRAPHER, WASHINGTON. 0.0.

l UNITED STATES JOHN H.-OSB()RNE, OF PHILADELPHIA, PENNSYLVANIA.

SEWING-MACHINE.

PATENT ()F ICE.

SPECIFICATION forming part of Letters Patent No. 239,189, dated March 22, 1881.

Application filed May 21, 1880. (N0 model.)

To all whom it may concern:

Be it known that I, J OHN H. OSBORNE, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in sewing-machines, and pertains to that type of sewing machines which are constructed as adapted to form zigzag and other fancy stitches; and the invention consists in certain features of construction and combinations of parts, as will hereinafter be described, and pointed out in the claims.

In'the accompanying drawings, Figure 1 is a view, in side elevation, of a sewing-machine embodying my improvement, a portion of the side of thegoose-neck being removed to illustrate a portion of the mechanism inclosed therein. Fig. 2 is a view, in side elevation, of the opposite side of the machine. Fig. 3 is a vertical longitudinal section taken through the needle-bar, some of the parts being represented in side elevation. Fig. 4tis a detached view, partly in vertical section and part front elevation, of the needle-bar and its case or box. Fig. 5 is a side view of the needle-bar and its case or box. Fig. 6 is a view, in perspective, of the worm on the main shaft. Fig. 7 is a detached view, in perspective, of the vibrating yoke.

Arepresents the main shaft, located in the goose-neck A, said shaft having a disk, a, secured to its forward end, and a wrist-pin, a, attached to the disk. An anti-friction roller, b, is journaled upon the wrist-pin, the roller engaging the cam B, fastened to the rear side of the elongated needle-bar case or box 0, whereby a vertical reciprocation is imparted to the latter by revolving the main shaft A. Needlebar caseor box 0 is of trough shape, and within its groove 0 is placed the needlebar 1), thelatter being pivoted at its upper end, as fat 0, to the case or box 0, thereby a1 equal to the width of one tooth.

lowing a free forward-and-backward movement to the lower end of the needle-bar and needle D. The front side of the case or box 0 is furnished with a slot or opening, at, near its lower end, for a purpose hereinafter explained.

To the main shaft A is secured a sleeve,.E, which has a worm, F, formed thereon or secured thereto, said worm being straight, or formed at rightangles to the length of the sleeve from its outer end, e, to the point e, at which portion a sharp incline, 0 connects the straight portion between 0 and e and the straight inner end, 6 (See Fig. 6.) A hearing or box, f, is secured to the upper side of the gooseneck, in which bearing is journaled the shaft G, the latter being screw-threaded at its opposite ends.

Upon one end of shaftGr is secured the wormgear H, by means of the nut g or other suitable device, the worm-gear extending through a slot in the goose-neck, and its teeth engaging the worm F, and adapted to be actuated thereby. The worm F being formed at right angles to the shaft, with exception of the sharply-inclined portion 6 imparts motion to the worm-gear only when such inclined portion (2 engages the teeth of the worm-gear, and then the latter is quickly turned a distance Hence the worm F on the main shaft serves to impart an intermittent movement to the worm-gear and shaft to which it is secured, by reason of the peculiar form of said worm. ()n the opposite end of the shaft Gr is secured a toothed wheel, I, by means of the nut h, or other equivalent device, to enable the wheel to be secured to the shaft in any desired rotary adjustment.

J is a latch or lever, which is pivoted, at i, to the side of the depending portion 2" of the shaftbearing, the upper end of the lever having a wed geshape nose or projection, 3', formed thereon, while its lower end is pivoted to a link, k, the opposite end of the latter being pivoted to the adjustable block or slide L, fitted to the sector-bar M, which extends upwardly from the yoke N. The yoke N is pivoted at K, and is constructed with the yoke-arms m m, located in front and rearoftheneedle-bar. Each yokearm is provided with a transverse hole, a, in which are inserted the bearing-pins O the latter being secured. in proper adjustment by means of the set-screws P P, inserted in the ends of the yoke-arms. Bearing-pins O O are rounded at their adjacent ends. One end of pin 0 engages with the rear side of the lower end of the needle-bar, while one end of pin 0 extends through the slot or opening (1 in the needle-bar case or box, and engages with the front side of the lower portion of the needlebar. The bearing-pins O O serve as lingers, engaging with the front and rear sides of the lower portion of the needle-bar, and as an oscillatin g movementis imparted to the yoke N, these fingers operate to impart a forward-andbackward movement -to the needle-bar and needle attached thereto.

A spiral spring, Q, is secured at one end to.

the goose-neck or head of the machine, and at itsopposite end is attached to the lower end of lever or latch J, and serves to retain the nose or wedge-shaped projection on the upper end of lever J in'contact with the periphery of the toothed wheel I. By rotating the main shaft an intermittent movementis imparted to the toothed Wheel I, as hereinbefore explained, and the extent of such intermittent movement is equal to the width of the crown portions k of the teeth k of the wheel, or to the intervenin g slots 1 between the teeth. When the wheel I is moved so that one of the slots 1 comes opposite the nose of the latch, the nose is forced into the slot by the spring Q, thereby throwing the lower end of the latch or lever forward, and by means of the link forcing the sectorbar forward, thus tilting or oscillating the yoke and causing the bearing-pin O to move the needle-bar to the limit of its rearward movement, and allowing the needle in its descent to pierce the fabric to form the rear line of the zigzag stitch. The next revolution of the main shaft operates to force the nose of the latch outwardly from the slot Z onto the crown of next succeeding tooth, and to tilt the yoke in the opposite direction and cause the bearingpin 0 to force the needle-bar to its forward limit of movement, so that the needle in its descent will force the front line of the zigzag stitch. Thus it will be observed that the needle is caused to reciprocate very nearly in a vertical line, and its forward and backward movements are imparted thereto at the commencement of each successive stroke.

The extent of lateral movement imparted to the needle-bar may be readily regulated by raising or lowering the slide or block on the sector-bar, the slide being secured at any desired point by means of the set-screw R.

The toothed wheel 1 serves as a patternwheel, and by varying the relative widths of the crowns of the teeth and the intervening slots many different styles or forms of stitches may be produced.

It is evident that many slight changes in the construction and relative arrangement of parts may be resorted to without departing from the spirit of my invention, and hence I would have it understood that I do not restrict myself to the exact construction and arrange ment of parts shown and described; but,

Having fully described my invention, What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a reciprocating needle-bar case orbox, and aneedle-bar pivoted at its upper end within said box or case, of a worm attached to the main driving-shaft, a worm-gear and pattern-wheel, constructed and arranged to be moved intermittingly by said Worm, and devices connecting the lower end of the vibrating needle-bar with said patternwheel, substantially as set forth.

2. In a sewing-machine, the combination, with a vertically-reciprocatin g needle-bar case or box and a vibrating needle-bar, of an oscillatingyoke en gaging with theopposite sides of the needle-bar, and mechanism for imparting an oscillating movement to said yoke, substantially as set forth.

3. In a sewing-machine, the combination, with a reciprocating and vibrating needle-bar, of an oscillating yoke provided with adjustable pins or fingers which engage with the front and rear sides of the needle-bar, substantially as set forth.

4. In a sewing-machine, the combination, with a reciprocating and vibrating needle-bar, of an oscillating yoke for imparting forward and backward movement to the needle-bar, said yoke provided with a sector-bar, and mechanism adjustably connected with said sectorbar, for imparting movement to the yoke, substantiall y as set forth.

5. In a sewing-machine, the combination, with a vibrating needle-bar, of a worm on the main shaft, a worm-gear and pattern-wheel at tached to the same shaft, and a latch or lever engaging at one end with the pattern-Wheel and its opposite end connected by intervening mechanism with the needle-bar, substantially as set forth.

6. The combination, with a reciprocating needle-bar. case or box, and a needle-bar pivoted at its upper end within said box or case, of a worm attached to the main driving-shaft, a worm-gear and pattern-wheel, constructed and arranged to .be moved intermittingly by said worm, and a latch orlever arranged to engage at one end with the periphery of the patteru-wheel, and devices connecting the opposite end of the latch or lever and the needle-bar, substantially as set forth.

7. In a sewing-machine, the combination, with a vibrating needle-bar and an oscillating yoke engaging therewith and provided with a sector-bar, of a pattern-wheel, a pivoted latch or lever one end of which engages the pattern-wheel, and a link pivoted at one end to the latch or lever and at the other end adjustably secured to said sector-bar, substanment with the pattern-wheel, substantially as tially as set forth.'

set forth. 8. The combination, Withthe oscillating In testimony that I claim the foregoing I yoke and pattern-wheel, of. a latch provided have hereunto set my hand. 5 with a wedge-shaped nose, which engages with JOHN H. OSBORNE.

the pattern-wheel, a link pivoted at oppo- Witnesses: site ends to the latch and yoke, and. a spring BERNARD TAYLOR, for forcing "the nose of the latch in engage- LEWIS S. 00X.