US1823911A - Embroidery machine - Google Patents

Description

Sept. 1931- c. MUENTENER ET AL 1,823,911

EMBROIDERY MACHINE Filed Sept. 5. 1929 4 Sheets-Sheet 1 22 INVENTORS A'i'ToRNEY Sept. 22, 1931. 1 c. MUENTENER ET AL 1,823,911

EMBROIDERY MACHINE Filed Sept. 5, 1929 4 Sheets-Sheet 2 p 22, 9 1- 1 c. MUENTENER ET AL 1,823,911

EMBROIDERY MACHINE Filed Sept. 5. 1929 4 Sheets-Sheet 3 7 5' w F Afl o 4 55' 7 1 37 I 6.5" 3 59 49 5] [00 02 47 30 '"m "h- 45 I 46 1 3" a du I h. l t "I 3' h n I Huh. 1 HIM-33 "H n .59 5 6 E m: 47 55 m r E x MW @W INVENTOR WW4 ma'fwfla ATTORNEY.

C. MUENTENER ET AL Sgpt. 22, 1931.

EMBROIDERY MACHINE Filed Sept. 5, 1929 4 Sheets-Sheet 4 lNVENTOR5 ATTORNEY Fatented Sept. 22, 1931 n STATES PATENT OFFICE CHRISTIAN MUENTENER AND PAUL HELBIG, OF BOGOTA, NEW JERSEY EMBROIDERY MACHINE A pplication filed September 5, 1929. Serial No. 390,523.

10 of double ended thread carrying needlesarranged in upper and lower .tiers, causing the needles to pass through the fabric and be re leased from their holders coincidently with their engagement by other holders disposed on the opposite side of the fabric.

A further-feature is in the provision of means for tensioning the threads whereby each stitch is firmly drawn against the fabric in a manner hitherto characterized by the highest type of hand work only.

other purpose is to produce a machine that is essentially automatic in operation, and which consists of few and simple parts, designed for durability, ease of assembly, in-

work to be done.

These and other important objects, which will appear as the description progresses, are accomplished by the novel and practical construction, combination and arrangementof parts as hereinafter described and shown in the accompanying drawings, constituting a material part of this disclosure, and in which Figure 1 is a partial top plan View ofan embroidering machine made in accordance with the invention.

Figure 2 is an end View of the same.

Figure 3 is an enlarged transverse sectional view, taken through one side of the machine.

Figure 4 is a further enlarged view of the upper portion of the machine showing-the disposition of parts at the moment of interchanging the needles.

Figure 5 is a similar view of the same parts at the moment of tensioning the threads.

Figure 6 is a perspective view of the thread tensioning device.

Figure 7 is a partial longitudinal sectional view taken on line 7-7 of Figure 4E.

spection, and adjustment toaccommodate'the Figure 8 is a perspective view" of one of the double ended needle holders.

Figure 9 is a sectional view of a form of auxiliary needle bar,needle and guide, showing the stitch produced, the view'being somewhat diagrammatic.

The machine includes upright frames 15 at its ends which are rigidly connected at each side of their centers by spaced pairs of H channel beams 16-16 and 1717", upper and lower respectively.

The frame ends 15 consist of base and main body portions havin arcuate tops and the spaces between the adjacent lateral edges of the beams are freely receptive of open rectangulartambour frames 20 carrying the fabric'F to be ornamented, the fabric being held tautly positioned midway of the sides of the machine.

These tambour frames 20, see Fig. 3, are supported and actuated in any direction universally by means not shown but which will be readily understood, and are controlled by a pantographic device whereby the fabric maybe moved in conformity with a given pattern, such'devices being old and of common occurrence.

A shaft 22 is journalled in the base of the frame ends 15 centrally thereof, and may be driven from any convenient motive power.

Fixed on the shaft, adjacent the inner surface of the frame ends, are cams 23 having two lobed peripheral faces slightly variant one from the other for a purpose further on explained.

As the opposed sides of the machine are essentially symmetrical and alike, one side will be given reference numerals while onthe opposite side the same parts will be designated by the same numerals provided with primes.

Pivoted at 25 to the frame ends 15 are bell crank levers 26, their shorter arms carrying rolls 27 held in contact with the cams 23 by tension springs 28 in addition to the gravity of their longer outstanding arms which are slotted to engage pivots 29 set in the lower ends of upright bars 30 provided with slots 31 movable vertically on guide pins 32 fixed in the end frames 15, the bars being slidable adjacent the outer edges of the beams 16-17.

Fixed to extend across the beams 16 and 17 are a series of cam brackets 3334=, their inner faces registering with the corresponding edges of the beams and their rear portions extending outwardly past the beams.

The front portions of the brackets are provided at their sides with raised arms curved outwardly, presenting supports 35-36 through which extend rods 37-38, later described.

Midway of the length of the brackets 3334: are raised brackets 39- 10 carrying the outer ends of pairs of transverse rods 451-42, their inner ends being set in bosses on the arms 35-36.

Each pair of the rods 41-42 is in parallel, at right angles to the plane of the longitudinal center of the machine and acts as guides to engage pairs of lugs 45-456 extending in spaced relation from slides 4718 movable therealong.

At the rear of the slides 47-48 are raised lugs to which are attached by pivots &950, links 5152 pivotally engaged at their opposite ends on shafts 53-5 1 extending lengthwise of the machine and fixed in the upright bars 30 at appropriate points to transmit reciprocative rectilinear motion to the slides.

.The inner front edges of the slides 474c8 are raised, bevelled on their adjacent surfaces and are adapted to'act as track rails 5556 on which are ad ust ably mounted a series of needle carriers 57 in which double ended needles 58, having central thread eyes,

may be held by spring pressed clamps 59 pivoted to the bodies of the carriers.

By referring to Figs. 4 and 5 it will be seen that the outer, angularly raised ends of the clamp elements 59 make contact with the 7 release rods 37-38 'at the extreme inner movement of the slides and it will be clear that this movement is obtained by the timing of the cam 23 to release the needles after piercing the fabric and on the other side of the machine to grasp the needles coincidently with their release.

In order to grasp the bight of the looped thread T and draw it out to cause proper tension, a series of fingers 65, see Fig. 6, are pivotally mounted on studs 66 and drawn into the full line loop engaging position by torsion springs 67 encircling the stud, the tension of the springs being adjusted by nuts 68.

The lower ends of the studs are set in supports 69, here shown as of right angular cross section, the same being mounted at its ends on pads at the ends of the short arms 70 of bell-crank levers, their longer arms 71 being pivoted to rods 7 2 7 2., carried at the ends of upright yoke bars 73 later on described in detail. I V

The bell-crank levers 70-71 are fulcrumed on pivot shafts 7 i slidably engaged in cam grooves 75 formed in the sides of the brackets 33-34; in such manner that the tension fingers 65 assume different angular positions in accordance with the sinuosities of the cams 75 the profiled grooves of which present horizontal, raised portions at their inner ends blending into steep clown- Wardly inclined portions leading to the main, slightly downwardly inclined portions and terminating in raised elements at the extreme outer ends of the heads 33-*-l, the upper profile of which follow the shape of the grooves, as best seen in Fig. 3.

The upright yoke bars 73 have at their inner edges, centrally of their lengths, inreaching arcuate extensions 78 secured to the outer surfaces of which are cross bars 79 slidably engaged in support guides 80 fixed on the frames 15 in such manner as to permit the bars to move freely in a plane horizontally of the machine, thebars being drawn inwardly towards the center of the machine by tensions springs 81 extending between them. 7

Fixed on the extending ends of the drive shaft 22, see Figs. 1 and 2, are sprockets 85 around which are trained chains 86 driving similar sprockets 87 fixed on stub shafts 88 j ournalled in the frame ends 15, and fixed on the inner ends of the stud shafts are cams 89, their peripheral faces making contact with rolls 90 at the inner ends of the bars 7 9.

From an inspection of Fig. 3 it will be seen that the cam 89 is adapted to press the upright bars 73 outward against the tensional effect of the springs 81 and in oppositely timed relation. 7

The timing of the cam 23 must be such that one lobe 23- is adapted to move the slides 47, thereb causing the rods 37 to simultaneously re ease the needles on one side of the machine, just prior to retraction of the needle carriers on the other side, whereby the needles are freed from the carriers after passing through the fabric and for the shortest time possible.

The finger 65 of the tension device is positioned'to enter the thread loop, moving it downwardly and outwardly until the thread is drawn taut, whereupon the springs 67 permit the finger to release the thread and assume a position to engage the next succeeding loop.

In addition to embroidering fabrics by inserting threads and yarns in accordance with a predetermined pattern, the machine may also be used to produce tufts or a raised plush-like ornamentation, this being accomplished by an attachment which will now be described.

Carried by the pivots 49-50 are arms 100101, having fixed at their outer ends angle bars 102'in which are fixed, as at 103, see Fig. 9, a plurality of hollow needles 10 i, fed with threads Y entering the open rear end of the needles and passing through their tubular bodies to eyes 105 adjacent the points 106.

These needles are guided by light angular brackets 107 attached to the bars 102, to pierce the fabric F and form loops as at YL on the opposite side which may afterwards be cut, leaving loose ends of any desired length extending outwardly.

When this attachment is used obviously the needle carriers 57 and tension fingers are removed from the side only of the machine required for use, except in the event that both sides of the fabric are to be ornamented.

Although the foregoing is a specification of the complete machine, it is to be understood as descriptive rather than restrictive, as many minor changes may be made without departing from the spirit and scope of the invention in its widest aspect and within the terms of the appended claims;

laving thus described the invention what is claimed as new and sought to'secure by- Letters Patent is 1. An embroidering machine comprising in combination with a fabric holding frame, of an upper and lower series of needle holders on each side of said frame, cam means for actuating-the holders on one side in opposed timed relation to the holders on the other side alternately, means for passing threaded needles from one series of holders to the other through the fabric, means for automatically releasing the needles when in an advanced position, means on the opposite side of the fabric to grip the released needles, and pivotally supported yielding means to draw the threads carried by said needles taut on both sides of the fabric.

2. In an embroidery machine, a plurality of double ended needles mounted in the machine, said needles having a central thread carrying eye, means to pass said needles from one side to the other through a fabric, a spring actuated finger pivotally mounted to engage each thread, levers on which said fingers are mounted, means to actuate said levers, and cams to control the movement of the levers and thereby the path of said fingel-s.

3. In an embroidery machine having means for passing a plurality of threads through a fabric, means for drawing the threads taut as each stitch is taken, said means comprising a base support, studs set therein, thread engaging fingers pivoted on said studs to en gage the bight of the threads, torsion springs to actuate said fingers when released from the thread, and means to adjust the tension of said springs.

4. In an embroidery machine, a plurality of needle holders, double ended needles engageable therein, means to pass said needles through a fabric from one side to the other progressively, pivotally mounted fingers to tures.

CHRISTIAN MUENTENER. PAUL HELBIG.

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