US130556A - Improvement in wax-thread sewing-machines - Google Patents

Description

y R1.` ASHEl ZSheets--Sheetl- Wax-Thread Sewing-Machine.

No. 130,556. Patented Aug. 20,18'7

UNITED STATES PATENT CEEIOE,

ROBERT ASHE, OE BOSTON, MASSACHUSETTS, ASSTGNOR To AMOS L. woon,

TRUSTEE, OE SAME PLAGE.`

IMPROVEMENT IN WAX-THREAD SEWING-MACHINES.

Specilication forming part of Letters Patent No. 130,556, dated August 20,1872'.

To all whom it may concern:

Be it known that I, ROEERTASHE, of ABoston, in the county of Sul'olk and State of Massachusetts, have invented an Improvef ment in Wax-Thread Sewing-Machines 5 and I i do hereby declare that the following, taken in connection with the drawing which accompaf nies and forms part of this specification, is a description of my invention sufficient to enable. those skilled in the art to practice it.

4The invention relates to that class of sewin g-machines particularly designed for sewing With waxed thread, and in which each machine employs a hook-needle, working up through a plate at the top of a post, andan awl and a presser-foot working down from above the plate, the stock being fed by a lateral move,- ment of the needle when the `needle is in the work. In my invention, the post is stationary, and the needle-barslides in an arm or bearing which extends up from a rocker-plate hung upon a studpin projecting from the front of the post, and in another arm or bearing extendin g down fromthe rocker-plate,- the lower `arm* being connected to an arm on the end of a rocker-shaft, the reciprocating rotative movement of the shaft imparting the vibratory movement to the rocker-plate to eiiect `the forward feed movement of the needle when in the work, and its back movement when its point is below the work. This specifre methodof eiecting the feed constitutes one feature of my invention. 4An arm at the 'opposite end of the rocker-shaft is connected to a vertical arm extending' down from a horizontal rockersleeve or quill, at whose other end is a horizontal arm, from which a pin extends into a cam on the ily-wheel shaft. The connection of the arms is edected by an adjustableslidablock, by movement of which the throw of the rocker-shaft is varied to vary the feed.` At the end of the cam-wheel shaft is a crank, the pin from which extends into a vertically-reciprocatingbar, which is connected at its foot to an arm extending from a horizontal rocker-shaft, at whose other end is an arm jointed by a'link to a clamp xed to the needle-bar, the connection of the bar to the rocker-arm being effected by a slide that per- Vmits the bar to oscillate, the needle-bar re- `mailling at rest dnring the lateralmovements l presser -foot; m,

of the crank-operated bar, and being raised and depressed by the vertical movements of the bar'eiected by the ,crank-pin., Said bar extends above the cam-wheel, and is jointed at top to an arm on one end of another rocker-shaft, at whose'. opposite end isan arm,

only in the method of hanging the rocker-V plate that carries the bearings in which the needle-bar slides, but in the construction or arrangement of the mechanism that actuates the said rocker-plate, and permits its throw to be adjusted, and the mechanism that actuates the needle-bar and the awl-bar.

The drawing represents a machine embodying my invention.` f

A shows the machine in side elevation. B is a front elevation of it; C, a rear elevation.

c denotes the frame, composed of the base, upright, and goose-neck arm. At the front end of the base is the stationary post b, having at its top the needle-throat plate or worksupporting'plate c, provision being madefor the support of a table to surround this plate and extend to the upright d, as in other machines of this kind. c denotes the hook-needle; f, the needle-bar; g, the cast-off;` h, the cast-oft' bar 5 i, the awl; 7c, the awl-bar; l, the the presser-foot bar; n, the thread-guide; `o, the threadguide bar;` all these parts, except as to their means of actuation, being the same as in other machines of this class. Upon the front of the post is a pin, p, upon4 which is pivoted Vthe rocker-plate q, having two bearings, r s, in which slide the needle-bar f and the cast-Oifbar h. To the lower bearing .s is jointed (bya sliding or iexible connection) an arm, t, extending from fthe end of a long roeker-shaft,u, mountedin sta-- tionary bearings. At the opposite end of this shaftis a vertical arm, c, which is jointed-to an arm, w, extending from a rocker-sleeve, y, (that turns on a pin, 90,) there being at the oppositeend of this sleeve a horizontal arm, z, from which a pin, a2, extends into a cam-groove, t2, of a cam-wheel, c2, fixed ona rotary iiywheel and driving-shaft, 12v The arm 'v is jointed or connected to the arm w by a bolt, e2, that has a head, f2, which enters a slot or groove, g2, in the arm c, the bolt being coniined in place to the arm fw by a nut, h2. The bolt passes through a slot, i2, cut through the arm fw, and, by means of this slot and the groove g2, the bolt may be moved, and the throw of the arm thereby variably adjusted. The connection of the rocker-shaft to the bea-ring-plate q eii'ects the oscillation of said plate and the consequent feed or forward movement and the back movement of the needle; and, by the' provision for adjustment of the connection between the arms c w, the extent of feed movement of the needle may be varied as occasion may require. YThe lateral or feed move- Vment of the needle being thus produced, its 'vertical movements are eifected as follows:

The needle-bar passes through a clamp, k2

which is fastened to the'bar by a screw, l2, an

this clamp is connected, by a link, m2, to an arm, n2, extending from one end of a horizon- 'tal rocker-shaft, o2, (mounted and turning in stationary bearings,) from whose other end an arm, p2, extends. This arm p2 has a slot, q2, in which plays a slide, T2, atthe end of a bolt, $2,1ixed to and extending from a bar, t2. This bar is hung upon a pin, u2, extending from a crank, c2, at the end of the cam-wheel an'd driving-shaft d2. As the crankpin, in the rotation of the shaft, raises the bar the arm p2 is raised, the rocker-shaft is turned, and the nee- I dle is thrown up for its point to enter and pass through the work and the thread to be laid in its hook, and the continued movement'of the shaft causes the needle to be drawn down with the thread, the upward movement of the needle, its feed movement, and its downward movement taking place together and without intermission; but when the needle is down, or nearly down, there is a short pause or slowling77 of its movement during the-time the slide is passing from the outer end of the slot q? to the inner end thereof, there being, of course, a rapid vertical movement of the bar when the crank-pin is moving vertically, and but a slight vertical movement when the pin is in or near a vertical plane. The vertical throw of the needle may be adjustably regulated by changing the position of the connecting-bolt s2 with reference to a slot, y2, in the bar t. At the top of the bar t2 it is jointed to an arm, z2, extending from one end of a rocker-shaft, a3, at whose other end is an arm, ba, that is jointed to the awlbar 7a, and the reciprocating vertical movements of the awlbar are thus effected by thel actionof the crank-pin la'fupon `the bar t2. lThewconnection of 'theY arm z2 to 'the bar lis slightly adjustable by means of a bolt, d?, nut c3, and slot f3; but when the machine is in operation there is no sliding movement of the connection, all the lateral movement of the crank-operated bar being effected through the provision for sliding movement of the connection of the foot of 4the bar t? to the arm p2, by means of the slide r2 and slot q2, and through this provision the timing of the respective movements of the needle and awl are eifected.

Whenever the bar is moving up, the awlbar and needle-bar must, of course, both rise, but while the crank-pin is passing its vertical center the awl-bar will be comparatively stationary, while the lateral movement of the foot of the crank-bar will cause the needlebar to have a considerable vertical movement.

When the crank-pin, having passed its lowf er center, begins to rise, the awl is in the work and the point of the needle is brought very near to the; point of the awl, so that asthe awl rises from the work the needle enters the awl-hole. The points rise nearly together un-` til the needle-point is well through the work. When the crank-pin begins. to rise through the upper quarter of its rotation, the lateral move'- ment of the crank-bar begins; but as the up; per end of the bar has no lateral movement, the awl-bar moves faster than the needle-bar, the vertical movement of the end of the crankbar that actuates the needle-bar having to be Y modified by its lateral movement. The awl, therefore, moves faster than the needle, and increases the space between their points, and the action of thecrank-bar upon the arm causes the needle to beginy to descend while the awl is completing its ascent. The awl having risen, remains still, or does` not begin to de soend until the work has been fed, the thread laid in the hook of the needle, and the needle point is below the work. Then it descends and punctures the work and remains atl its lowest position and in the work, until thence dle, having been moved back and brought into vertical line with the awl, again starts up, its point nearly reaching the work before the awl begins to rise, and entering the work before the awl leaves the work. The presser-foot bar m is `raised by a projection from the arm b3, which strikes a piece, g3, flxed on the bar m, and it is thrown down by the stress of a spring, o3, when the awl-bar descends. .The ,threadguide bar is thrown forward by the action of a hook, h3, upon a roll, i3, when the-awl-bar rises, and is thrown back by a spring, k3, when the awl-bar descends. The cast-o bar is act-` uated by the action of a projection, Z3, from the needle-bar, alternately, upon two pieces, m3 n3, onthe cast-off bar.

' The camwheel c2 is made adjustable on the Icrank-shaft and with reference to the crankarm, for which purpose the crank has an arm, p3, in which is a slot, g3, through which slot extends a bolt, 1'3,that` fastens the arm and 'camtogethen By loosing this bolt the ca'm wheel may be adjustably turned with refer ence to' the crank-arm, and by these means the action of the cam to effect the feed may be adjustably timed with reference to the action of the crank, to effect the vertical movements of the aWl and needle.

I claim- 1. In combination with the stationary post, the pivoted and swinging bearing-plate q, carrying a needle-bar and cast-off bar, and connected to a rocking-arm, t, by a sliding connection, substantially as shown and described.

2. The rocker-shaft u and its arms t o, and the rocker-sleeve y and its arms w z, and the cam-wheel c, arranged and operating together, substantially as shown and described.

3. The rocker-shaft o2, slotted arm p2, arm n2, crank-bar t2, crank o2, rocker-shaft a3, and arms z2 b3, for actuating the needle and aWlbars, substantially as shown and described.

4. The combination with the presser-foot and thread-guide, for the purpose of imparting the upward movement of the presser-foot and the forward movement of the thread-guide, of the arm b3 that reciprocates the aWLbar, their opposite movements being produced by springs, substantially as shown and described.

5. In combination with the crank, the cam- Wheel c2, made adjustable on the crankshaft, substantially as and for the purpose described.

6. The arrangement of the slotted arm p2, rocker-shaft o2, rocking-bar t, operated as described, and slotted at its lower end, andthe adjusting-pin s2, as shown and described.

7. In combination with a needle-bar and an awl-bar, operating in line or from opposite sides of the work-plate, a single crank with intervening mechanism for imparting the respective movements to the respective bars.

Executed J une 6, 1872.

ROBERT ASEE.

Witnesses:

FRANCIS GoULD, M. W. FROTHINGHAM.

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