US1267594A - Embroidering mechanism. - Google Patents

Description

W. R. ROGERS.

EMBROIDERING MECHANISM.

APPLICATION man JULY 20, 1916.

Patented May 28,1918.

3 SHEETSSHEET 1.

IN VEN TOR.

BYQ4DV ATTORNEY W. R. ROGERS.

EMBROIDERING MECHANISM.

APPLICATION FILED JULY 20. 1916.

1,267,594, Patented May 28,1918

3 SHEETSSHEET 2.

IN V EN TOR.

A TTORNEY.

W. R. ROGERS.

EMBROIDERING MECHANISM.

APPLICATION FILED JULY 20. 1916- Patented May 28,1918.

A TTORNEY ITED STATES PEN FFICE' WILLIAM R. ROGERS, OF NEWARK, NEW JERSEY, ASSIGNOR TO WILLIAM RAUIBIT- SCHEK, 0F BROOKLYN, NEW YORK.

EMBROIDERING MECHANISM.

Specification of Letters Patent.

Patented May 28, 1918.

Application filed July 20, 1916. Serial No. 110,356.

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, county of Essex, State of New Jersey, have invented an Improved Embroidering Mechanism.

My invention relates more particularly to providing an automatic control for the mechanism in a sewing machine for producing a zig zag stitch, adapted to vary, as may be desired, the width of each succeeding stitch and its location relatively to a line drawn longitudinally through the center of thepattern produced in the stitching operation, and to the varying of the design of such pattern at will.

I now have pending an application for United States Letters Patent for such an au tomatic control in sewing machines adapted to produce zig zag stitches through a vibrating needle mechanism filed July 28, 1916, Ser. No. 111,788, but another class of machines produce such zig zag stitches through the lateral reciprocation of the needle bar while positioned vertically, through a positive motion.

Among other objects of my invention is the providing of such an automatic control of the movements of the needle bar in sewing machines of the last described class, for the production of patterns of varying design having curved or irregular contours, or figures, in which the width and the location of succeeding stitches are varied in a greater or lesser degree, as for example a scalloped edging having a true crescent shape, and to produce an indeterminate series of such pattern sections; varying the design of the pattern at will.

Having thus generally described some of the objects of my invention, I will now more particularly describe the same by reference to the annexed drawings which show my invention as applied to a Wheeler and Wilson sewing machine, adapted to produce a zig zag stitch through a positive lateral motion of the needle bar between vertical reciprocations. This motion is in this instance secured through a rock shaft and frame on which the needle bar is mounted to reciprocate vertically.

My automatic mechanism includes means for variably controlling such lateral motions of the needle bar comprising a pattern cam which receives motion from the needle bar shaft and which is connected with the needle bar rock frame by two link systems, hereinafter described in detail, by means of which the width and location on the material of each successive stitch is controlled and determined to conform'to the pattern design represented by the peripheral contour of the pattern cam.

In the drawings similar reference characters indicate identical parts.

Figure l, is a side elevation of the back of the machine, showing generally the pattern cam and related broken away as shown.

Fig. 2, is an elevation of the front of the machine, modified to show certain parts in section and elevation and others indicated.

Fig. 3, is a. side elevation of the side of the machine opposite to that shown in Fig. 1.

Fig. 4, is a diagrammatic view of the scalloped edging produced by the machine.

The machine shown in the drawings is of the Wheeler and Wilson type, of the usual construction to produce a zig-zag stitch; the needle bar being mounted for lateral motion and alSO to be reciprocated laterally between vertical reciprocations.

To this mechanism I have added. automatic means for variably controlling the successive lateral reciprocatory motions of the needle bar, both as to their amplitude, or extent and their location relatively to a longitudinal line drawn through the centerof the pattern, or design produced in the stitching operation.

The stitch producing mechanism consists of the needle 1, and the usual looping device 2. The needle 1, is secured in the needle bar 3, which is mounted to reciprocate vertically on the rock frame 4- The latter is pivoted on the pintles 5 5*, to be reciprocated laterally. The needle ba-r shaft 6, is provided with a crank wheel 6*, on which is mounted, by a ball and socket joint, an arm 6 which, at the other end is secured, by a similar ball and socket joint, to the lug 6, needle bar 3, this arrangement permitting the needle bar to be reciprocated vertically when the needle bar is moved laterally, in either direction.

The lateral reciprocatory impulses to proparts, with certain parts carried by the V duce a zig-zag stitch are given to the needle bar 3, from the needle hair shaft 6, by a worm7, on the latter, which engages with a worm gear 8, carried by the transverse shaft 10, on which is also mounted an eccentric cam 9. Engaging with the latter is a yoke 11, carried on the end of the reciprocating I is permit-ted by a link system 12, comprised of an arm 12, fixed to the transverse shaft 12, which ispivotally connected with the yoke 11, by the link 12 and is efiected through the following mechanism.

Keyed on the stud 16, or the bracket arm 5, of the sewing machine, is a rotary pattern cam 17, for the automatic control of both the amplitude, or extent, and the relative location of the successive lateral reciprocatory motions of the needle bar 3, thus determining thecontour, or pattern, of thedesign to be produced by the stitching operation. The cam 17, takes continuous motion from the needle bar shaft 6, through a step teed, comprising a pawl 18, and ratchet 19, beingoperatively controlled by an eccentric-20, on the transverse shaft 10. The pawl 18, is adjust-ably timed to ad Vance one step for each, downward reciprocation of the needle bar 3. The pawl is car ried by an arm 18 which is fulcrumed on the stud 16, and connected with the eccentrio strap 20, by the" link 20?, by means or" the set screw 20, let through the slot 209*, in the arm 18", and the throw of the pawl may be adjusted as desired, to advance the ratchet two ormore steps at each vertical reciprocationof the needle bar.

A roller 21, carried on the arm 22, pivoted on the bracket arm 5, by the pin 23, is maintainedin contact with the periphery of the rotary pattern cam 17, by a compression spring 24:, mounted on the pin 28. The outer end of the arm is connected with a system of levers, comprising the members 25,26,27, as shown, the last member 27, of whichis adjustably engaged inthe slot in thereciprocating arm 13, by a set screw and is connectedby. a ball and socket joint to the member 26, as shown. The periphery of the cam 17, is given a figure or contour corresponding to the pattern of the design to be produced by the stitching operation, which 'in this case isof crescent form, as shoWn in Figs, and produces a scalloped but the pattern cam 17, is movably mounted on the stud 16, being retained in position by the screw 16 and as is obvious, the pattern may be changed by substituting edging difierent cam to produce any design for which the mechanism is adapted.

The stitching operation on a pattern section is completed on every half turn, or revolution, of the pattern cam 17.

There are two link systems involved in the operation of the mechanism controlling the lateral motions of the needle bar. The pattern cam 17 is operatively related to the one'by the roller 21, which travels oirthe periphery of the pattern cam and as it is mounted on the arm 22, fulcrumed at 23 on the main frame of the machine as shown, its motion is toward and from the radial center of the pattern cam 17, thus imparting a reciprocating motion to the link 25.

The pattern'cam 17 is connected to theother link system by the rock-lever 26, which is rigidly secured to the shaft 12 this rock lever is provided with two arms one of which is vertical and is connected to the slotted arm 13, fulcrumed on the needle bar or rock frame l. To the transverse shaft 12 is fixed therock-arm 712*, of the link system. 7 A link 12, is pi'votallyv connected to the rock arm12 and'to the reciprocating arm 11 The reciprocations of the latter are thus modified by the link system 12.. The impulses received by the needle bar through the slotted arm 13 are thus compounded of the motions imparted by the link 27 and the arm 11 Themotions of the link27 are themselves modifiedby the rocking motion given to the yoke 11 and the end of the arm 11*, as isobvious.

The feed mechanism is of the usual design to provide an intermittent forward feed as is shown in Fig. 1.

The fabric strip 68, which is usually of indeterminate" length, passes through a suitable holder 60, attached to the base of the main frame of the machine, as shown in Fig. 2. Prior to reaching the holder the strip 63, passes through the tension device 61, and it is guided to the said tension device over the guide rod 62.

The operation of the machine is as follows:

The material is automatically tedto the machine and positioned through the action of the holder 60, and the feeding device, by an intermittent forward motion in a straight line.

The pattern design is progressively produced in the stitchingoperation through the automatic control of the width and relative location of each successive reciprocatory motion of the needle bar and, completed with each half revolution of the pattern cam, the pattern sections are thus reproduced in an indeterminate series:

The determinate pattern 01 the design may be varied at will by changing the pat tern v cam which is removably mounted for that purpose, the variable control exercised through the pattern cam adapting the machine for producing varied designs other than that of the sample illustrated.

The automatic reproduction of the pattern section is operatively in a continuous series.

Having thus specified, described and shown the same, I claim as novel and my invention:

1. In a sewing machine, in combination, a needle bar rock frame mounted for lateral motion, a rotary eccentric cam, a yoke which receives motion from the eccentric cam and imparts motion to the rock frame, a rotary pattern cam, a second rotary eccentric cam from which the pattern cam is rotated, means for rotating the eccentric cams, a link system connecting the pattern cam directly with the rock frame and a second link system connecting such pattern cam with the yoke to control the lateral motions thereof.

2. In a sewing machine, in combination, a needle bar rock frame mounted for lateral motion, a rotary eccentric cam, a yoke which receives motion from the eccentric Copies of this patent may he obtained for five cents each, by addressing the cam and imparts motion to the rock frame, a removable, rotary pattern cam, a second rotary eccentric cam from-which the pattern cam is rotated, means for rotating the eccentric cams, a link system connecting the pattern cam directly with the rock frame and a second link system connecting such pattern cam with the yoke to control the lateral motions thereof.

3. In a sewing machine, in combination, a needle bar rock frame mounted for lateral motion, a rotary eccentric cam, means for rotating the same, a yoke which receives motion from the eccentric cam and imparts motion to the rock frame, a rotary pattern cam, means for intermittently rotating the same, a link system connecting the pattern cam directly with the rock frame and a second link system connecting such pattern cam with the yoke to control the lateral motions thereof.

WILLIAM R. ROGERS.

Commissioner of Patents,

Washington, D. G.

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