US1250511A - Vibratory needle mechanism. - Google Patents

Description

W. R. ROGERS.

waa/nom NEEDLE MecHAmsm.

APPLCAUON FILED MAY l, 19|@- `1,250,51 1. Patented Dec. 18, 1917.

4 SHEETS--SHEET l..

m m w l i Atty w. R. ROGERS.

VIBRATORY NEEDLE MECHANISM.

APPLICATION FILED MAY 1, 191s.

1,250,51 1. Patented De@ 18,1917.

4 SHEETS-SHEET 2.

W. R. ROGERS.

VIBRATORY NEEDLE MECHANISM.

APPLICATION FILED MAY l, |916.

Patented Dec. 18, 1917..

4 SHEETS-SHEET 3.

In Ven tor: M5 7" E Z0-rw- Atty l .l x1. Islslls ggg/ W. R. ROGERS. VIBRATORY'NEEDLE MECHANISM.

APPLICATION FILED MAY l. 1916. l1,250,51 1.

Patented' Dec. 18, 1917.

I1 lSHEETS-SHEET 4 V /Ty-Z Invento Atty UNTED STATES PATENT OFFICE.

WILLIAM R. ROGERS, OF NEWARK, NEW JERSEY, ASSIGNOR T0 WILLIAM RAUBITSCHEK, OF BROOKLYN, NEW YORK.

`VIIBEtA'lORY NEEDLE MECHANISM.

Specification of Letters Patent.

Patented Dee. 18, 1917.

Application filed May 1, 1916. Serial No. 94,729.

To all whom it may concern:

Be it known that I, WILLIAM R. ROGERS, a citizen of the United States, residing in the city of Newark, count-y of Essex, State of New Jersey, have invented a new and useful Improvement in Vibratory Needle Mechanism.

My invention relates more particularly to the automatic mechanism for producing a series of successive operative movements of the needle bar, and for repeating the same indeterminately.

Among other objects of my invention, may be specified the providing of a stitching mechanism adapted to sew a seam in a straight line for a measured interval, and then produce a determinate number of tie stitches and then continue stitching in a line parallel with the direction of the seam for a determinate interval, and again produce a determinate number of tie stitches and complete the operation by leaving the needle positioned to continue the seam on a projected line of the seam as illustrated in the drawings.

My invention is more particularly adapted to be used in a machine wherein the material is advanced forward in a straight line, for the stitching operation, and is fed to the machine in indeterminate lengths, and is Aparticularly adapted for p-erforming the stitching operation wherein a straight seam, having therein at measured intervals gaps of determinate width, is produced mechanically, by automatic means, in a continuous series of operations, including the production of tie stitches at the beginning and end of each gap.

A seam of the character described is useful among other things, to provide a fabric structure suitable for the mounting thereon, in operative position of a set of hooks and eyes, by engaging the mates of the pairs in the gaps thus provided, they being retained in position .by their Shanks, thus dispensing with the necessity for stapling hooks and eyes to the fabric, as is now done, and obviating the objectionable features of such method, familiar to those versed in the art. Having thus generally described some of the objects and features of my invention, I will further and more particularly describe and specify the same, by reference to a machine which embodies my invention.

The construction of thislmachine is illustrated in the accompanying drawings, in which similar reference characters indicate identical parts.

Figure l, is a side elevation of the sewing machine with parts shown in section, and with the guides for the fabric strips omitted.

Fig. 2, is an elevation of the front end of the machine, with the guides for the fabric strips in position.

Fig. 3, is an enlarged transverse section of the sewing machine on the line 3--3 of Fig. l.

Fig. 4, is a similar view of the mechanism for continuing the normal reciprocato'ry motions of the feed bar, during the intervals in which it is not engaged with the material.

Fig. 5, is a Vsectional nlan View of the same mechanism on the line 5 5 of Fig. 3, but with the feed bar in its normal operative position.

Fig. 6, is a plan view of two fabric strips l united by a seam, having therein gaps or openings adapted to receive and engage the hooks and eyes by their Shanks.

F ig. 7 is an enlarged transverse section of the same, on line 7 7 of Fig. 6l

Fig. 8, is a front elevation of the cani H H having but two recesses on its periphery.

Fig. YE), is a side elevation of the cam V V showing the angular sections in the groove o omitted, and the groove continued in straight section throughout.

Fig. 10, is a detail showing compression spring 12.

The stitch-producing mechanism of the sewing machine consists of a needle A, and the usual looping device B. The needle A, shown in Fig. 2, is secured in a needle bar C, mounted to reciprocate in an arm D, fulcrumed at its upper end, onY the bracket arm E, of the sewing machine,'as shown in said igure. By the arrangement described the arm D, and the needle bar C, and` with it the needle A., can be vibrated laterally, relatively to the direction of the seam produced, that is from its normally verticalposition to the right, relatively to the operator. The needle bar C, is reciprocated by the pitman F, which takes motion from the crank F1, carried by the needle bar shaft` F2.

The needle bar C is normally retained in a vertical position, but may be operatively vibrated, or may be deflected to the right and operatively retained in that position, and may also be again deflected and returned to its normal position as the automatic control of its varied stitching operations requires.

The vibrating mechanism is automatically controlled through a worm G2 mounted on the needle bar shaft F2 shown in Fig. 1, which intermeshes with la spur gear G1, carried by the cam shaft G on which is detachably mounted the rotary cam H, as shown in Figs. 1, 2, and 3, which operatively is rotated in the direction of the arrow a. The rotary cam H, is provided with two sets of recesses on oppositesides of the periphery of the wheel, as shown: each series are respectively lettered H1, H2 and H3, as shown in Fig. 1.

The peripheral face of the cam H is engaged by a friction roller I, journaled on the free end of an arm I1 pivoted, on the bracket arm E, to move laterally, and positioned by a tension spring I2 indicated in Fig. 1, to normally engage the roller I, with the peripheral face of the cam H, and to operatively engage the roller in the recessed sections. The arm I1 is provided with a guideway I3, through which is adjustably secured the link J2, by the pivot pin J. The link J2 is adjustably engaged and secured by two screws J5 for parallel adjustment to the link J2', to permit of positioning arm D. For the purpose mentioned, the part J2, is provided with an elongated slot J4, through which extends screws J5, engaging the part J3 to permit the lateral adjustment of the latter relatively to the part J2. In order to vary the amplitude of the vibratory motions of theneedle bar C, the pivot J is adjustably positioned in the guideway I3. The needle bar C is normally maintained in a vertical position by the engagement of the roller I, with the sections of the peripheral face of the cam H, intervening between the above described series of recesses therein, on the opposite sides thereof. Vhen the roller I engages in the recess H1, the needle bar C is deflected t5 the-right, or laterally of the line of movement of the material, andfis timed to complete a downward reciprocation in that position; the disengagement of the roller I from the recess H1 operatively returns the needle bar C to its normal position, and while in that position it completes a downward reciprocation. The engagement of the roller I in recess H2 again deflects the needle bar C to the right and it reciprocates in such deflected position during such engagement. The disengagement of the roller from recess H2 again returns the needle bar to itsnormal position where it completes a downward reciprocation. The engagement of the roller I in recess H3 again deflects the needle bar C to the right, in which position it completes a downward reciprocation, and the disengagement from the recess H3 of the roller I, again returns the needle bar C to its normal position in which position it continues to reciprocate until the roller I is in due course engaged in the next recess H1, when a similar series of operative motions of the needle bar C, are repeated. The oscillation of the shaft O gives motion to the feed bar N, and an up and down swinging motion is given to the feed bar N by the usual mechanism, including, as shown, a hollow rock shaft P, having an arm P1, movably engaging a fork N2 formed on the feed bar N. The shaft P is provided near its rear end with an arm P2, connected by an eccentric rod P3, with an eccentric P1 mounted on the needle bar shaft F2, so that when the machine is operated` a continuous rocking motion is given to the shaft P which through the arm P1, imparts an up and down swinging movement to the feed bar N. Through the hollow shaft P, extends the shaft B1, driving the looping device B and driven by pulleys B2. B3. and a belt B1, from the needle bar shaft F2.

The rock shaft (L previously mentioned, is provided at` its rear end with an arm O2 provided with an elongated slot orguideway C3 in which is inovahlv mounted a slide Q also engaging a guidewajv B2 in a swinging arm R having its` pivot R1 journaled in a bearing formed on a bracket depending from the base ll1. The arm Il is pivotally connected with'an eccentric rod S of an eccentric S2. mounted on the needle bar shaft F2, so that the arm ll is operatively caused to swing up and down and the swinging movement of the arm It is transmitted by the slide Q to the arm C2, to rock the shaft O, and thus operatively engage the feed bar N, with the material. The slide Q is provided with a pivot pin Q1 pivotally connected' by a link T with one arm of the lever T1, fulcrumed at T2, on the under side of the base E1, and connected by its other arm through a link U with one arm of a crank lever U1 fulcrumed on one side of the arm E and carrying at its other end a friction roller U2, engaging a groove o, in the peripheral face of a cam V, shown as detachably secured on the shaft Gr previously mentioned. The cam groove v is provided with angular offsets V2, V1, for imparting a reciprpcal motion to the lever U1. During the time the friction roller U2 is traveling through the straight sections V1 and "V3 of the groove o, in the cam V, the slide Q is held in the guideway of the arm R, at a suiiicient distance from the axis of the arm to impart a swinging motion through the slide Q to the arm O2, to rock the shaft O, as previously mentioned. When however, the friction roller U2, engages in the angular sections V2 or V-4 of the cam V, then a. reciprocal motion is given to the lever U1, whereby a similar movement is given to the lever T1, so that by the engagement of the roller U2, in either of such angular sections V2 or V4, the slide Q is moved into a central position, relatively to the axis of the pivot R, rendering the slide Q and shaft O inoperative, during such engagement of the roller U2. lVhen the roller U2 emerges from either of the angular sections named, and is returned to either of the straight sections V1 or V3, the lever T1, is thereby returned to its normal position, and again imparts operative motion to the slide Q, and shaft O. The angular sections V2 and V4 of the cam V, are so arranged relatively to the recesses H1, and H3, on the cam H, that their related motions are so timed that when the cross stitches K1 and K3 are produced the operative motions of the feed bar N cease, but during the time the rows of stitches K and K2 are produced the friction roller U2 travels in the straight sections V1 and V2 of the groove and the slide R is maintained at such a distance from the center of the pivot R1, as to secure the imparting of a rocking motion to the shaft O, thus operatively reciprocating the feed bar N.

The link T, previously mentioned, is preferably made in two parts, T3, T1, adjustable one on the other to lengthen or shorten the link, and for this purpose the part T3 is provided with an elongated slot T1, through which extend screws T6 engaging the part Tf, whereby the proper adjustment of the pivot pin Q1 and the slide Q, to move the latter into axial alinement with the pivot R1. may be secured as previously explained.

The fabric strips L and L1 pass through suitable scrolls W, W1, attached to the base E1, on the front of the machine to double up the edges of the strips and to properly guide the same to the needle A,`the feed bar and the presser foot X are of usual construction (see Fig. 2). The strips L and L1 prior t0 reaching the scrolls W and W1, pass through tension devices W2 and W3, and the strips are guided to the saidtension devices over a guide rod W4. The interval between the gaps are controlled by the distance be'- tween the recessed sections of the cam H, and the width of the gap is determined by length of the recess H2.

The operation of the machine is as follows:

The material is operatively fed to the machine in a straight line, by a constant forward motion, which is interrupted only when the feed is rendered inoperative during the intermittent periods as hereafter eX- plained. And the material is so positioned that the stitching operation shall produce a seam conveniently near the edge of the strip of fabric material, when the needle is normally positioned Aand reciprocating1 vertically, and shall engage both the material of the strip and the body or base fabric, and unite them together as illustrated by the sections K K2 in Fig. 6. The seam thus produced is continued for the measured interval, during which the friction roller I, is engaged with the peripheral face of the cam H, before reaching either recess H1. lVhen the roller I, in due course engages in either recess H1, the lateral movement of the arm I1 thereby permitted, operates to deflect the needle bar C to the right and simultaneously with the engagement of the roller I, in the recess, the feeding mechanism becomes inoperative, as heretofore eX- plained, and the succeeding downward reciprocation of the needle A, produces a stitch at right angles to the line or direction of the seam K, then the roller mounts the peripheral section between the recess H1 and the recess H2, thereby deflecting the needle in an opposite direction, and returning it to its vertical position. The material remaining stationary, through the lack of engagement, with it of the feed member N; the needle is then reciprocated downward, making a second stitch in the same location, in the reverse direction. The needle bar C, as the roller I, descends into the recess H2, is again deflected to the right befo're the feed bar N is again engaged'with the material, thus adding another tie stitch, and completing the operation of tie stitches. With the material properly positioned, the lateral deflection of the needle, to the right, while making tie stitches, carries it beyond the edge of the strip of fabric material, so that one end of the stitch engages with and unites both the fabric material and the body fabric, while the other end engages only in the material of the body fabric. Through the timing of the related motions of the cam H, with the cani V, the feed bar N, which had been so depressed, during the tie stitch operation, that it did not engage with the fabric material to advance or feed it forwardly lto the needle, is again restored to operative position and engagement, and so remains while the roller I, is in its depressed position in the recess H2 during which period a series of stitches are produced, which engage only with the body fabric, and which are so produced in a line parallel with the direction of the seam K. When the roller I mounts from the recess H2 to the peripheral face of the cam H, it operatively returns the needle bar C to its normal position, while simultaneously therewith, the feed member N. is again disengaged from the material and rendered inoperative, the stitch thus produced being at substantially a right angle, as the material remains stationary, and the needle bar C is reciprocated downwardly, producing a tie stitch, the inner end of which is on a projected line, identical with the section of the seam K, theretofore completed. lfVhen the roller l, descending into the recess H3 again deflects the needle bar C to the right, and the needle is downwardly reciprocated in this position, adding another tie stitch, the outer end of which engages only with the body fabric, then the roller l, mounting from the recess H3 to the next intervening section of the face of the periphery of the cam H again returns the needle reversely to its normal position, where the downward reciprocation of the needle adds another tie stitch, completing the production of the tie stitches, at the end of the gap or opening, thus producing a gap in the seam, uniting the strip of fabric material with the body fabric. Simultaneously with the roller l again attaining the face of the periphery of the cam H, the timing of the related motions of the feeding device and the vibratory mechanism, actuating the needle bar C, causes the operative rengagement of the feed member N, with the fabric material, thereby resuming the forward advance of the material, continuously for the next measured interval, before the production of another gap or opening, with the attendant operations of inserting the required number of tie stitches, at the beginning and the end of the gap. The strip of fabric material is fed to the machine in indeterminate lengths, and thev automatic production of a series of gaps of determinate width, operatively continues, while the material is fed for that purpose.

Having thus specified and described my invention, and shown a machine wherein it is embodied, I claim as novel, and my invention:

l. In a sewing machine, an automatic stitch producing mechanism comprising, in combination, a needle bar, a frame fulcrumed for lateral vibratory motion in which the needle bar is mounted to reciprocate, a needle bar shaft from which such needle bar is reciprocated, a rotary cam having a number of recesses, located diametrically opposite each other, on its periphery, a worm gear through which the cam receives motion from the needle bar shaft, a rock' arm, a friction roller carried thereon engaging with Such recesses 1n the cam and adjustable links connecting said rock arm withv the lower end of the needle bar frame.

2. In a sewing machine, an automatic stitch producing mechanism comprising, in combination, a needle bar, a frame fulcrumed for lateral vibratory motion in which the needle bar is mounted to recipro cate, a' needle bar shaft from which such needle bar is reciprocated, a rotary cam having a number of recesses on its periphery, located at such relative distances from each other as to adapt them to operatively deflect the needle bar, at timed intervals, to permit ofthe insertion in the material of an offset Section of stitching with tie stitches at each end of such section, a worm gear through which the cam receives motion from the needle bar shaft, a rock arm, a friction roller carried thereon engaging such recesses in the cam and adjustable links connecting such rock arm with the lower end of the needle bar frame;

3.111 a sewing machine, an automatic stitch producing mechanism comprising, in

combination, a frame fulcrumed at its upperA end for lateral motion, a needle bar mounted to reciprocate therein, a needle bar shaft from which such needle bar is reciprocated, a rotary cam, also receiving motion from such needle bar shaft having two groups of recesses onopposite diametrical faces of its periphery, each group containing recesses of unequal length, a friction roller mounted to operatively bear on the periphery of such cam, a lever fulcrumed at its upper end on which said roller is carried and which lever is operatively related to the needle bar frame to control the lateral motions of the latter.

WILSON W. HOOVER, JULIA MAURER.

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