US927153A - Welting-machine. - Google Patents

Description

J. LARSBN. WELTING MACHINE.

APPLICATION FILED SEPT. 22, 1908.

927, 153. Patented July 6,1909.

3BHEBTS-BHEBT 1..

WITNESSES Nil/EH70]? "roams J. LARSEN.

WELTING MACHINE.

APPLIOATION FILED SEPT.22,1908.

Patelited July 6, 1909.

3SHEBTS-SHEET 2.

INVENTOR Jizlz'aa Zanyen/ M rd WITNESSES ATTORNEYS J. LARSEN.

' WELTING MACHINE. APPLICATION FILED 82mm, 1908.

Pater med Jul 6, 1909.

3 SHEETS-SHEET 3.

Tia-

y. INVENTOR fillz'uslaraen/ Arm/m WITNESSES by the needle.

UNi'lE'l) STATES PATENT onnion.

JULIUS LARSEN, OF COPENHAGEN, DENMARK, ASSIGNO-R, BY MESNE ASSIGNMENTS, T O LARSEN MACHINES COMPANY, A CORPORATION OF NEW YORK.

Patented July c, 1909.

To all whom it may concern: I

Be it known that I, J mus LAnsnN, a citizen of the Kingdom of Denmark, and a resident of Vestergacle 11, Copenhagen, Denmark, engineer, have invented new and useful Improvements in Welting-Machines, of which the following isa specification.

My invention relates to means for handling welts in welting machines and in other forms of machines for sewing leather, my more particulanpurpose being to provide means whereby thewelt is fed step by step into a p osition favorable for enabling it to be pierced Reference is to be had to the accompanying drawings forming a part of this specis,

fication, in which similar characters of reference indicate corresponding parts. in all the figures. v

Figure 1 is a front elevation of my device, showing it, as applied to a machine for sewing leather welts; Fig. 2 is a side elevation of the device, showing it as viewed from a point at the left of Fig. 1; Fig. 3 is a detail showing how the welt is held in a position favorable for enabling it to be pierced by the sewing machine needle; Fi 4 is a plan view of the welt handling device; Fig. 5 is anjnverted plan of the stitch plate which, to some extent, serves as aguide forthe moving welt.

At 1 is shown the head or column of the sewing machine, and below it is an oscillatory ring 2 which contains a shuttle box 2. Mounted upon the upper edge of the oscillatory ring 2 and partially encircling the upper portion of the shuttle box 2 is a .02111161 ring 3 which travels with these parts.

Mounted upon the oscillatory ring 2 and ex tending upwardly therefrom is a pawl 1 which is engaged by a leaf sprin 4. The upper end of this pawl is disposed adjacent to a circular row .of.teeth 5 with which the carrier rin 3 is provided. The carrier ring 3 is provided with another circular row of teeth 7, this row being madeupof smaller teeth and being also of slightly lesser diameter than the row of teeth 5.

At 7 is a welt which fis to be fed step by step into a position favorable for enabling it to be sewed.- At 8-is a leaf spring which presses gently ufpon the welt. At 9 is shown a stitch plate arming a partbf. a 'sewin machine. The leaf spring supperteg u on the under side of this stitch plate by aid of a bolt 10., A lever 11' is journaled upon a pivot pin 12 carried by lugs 13 which are integral with the oscillatory ring The lever 11 is provided with a slot 11 through which the welt 7 is fed. The lever 11 at a point below the pivot 12 is bent substantially to a right angle, its end being thus brought central y beneath the oscillatory ring This lower end of the lever 11 is provided with a convex bearing, surface 11 which rests upon a mating bearing surface 14 carried by a cam lever 15. The purpose of this arrangement is to keepj the bearing surface 11 always centriliin" relation to the oscillatory ring 2, notwithstanding the movement 'of this ring. The cam lever 15 carries a cam roller 16 which isengaged by a rotary cam 17 driven by a shaft 18. As the cam 17 is turned, a rocking motion is conferred upon the cam lever 15, and consequently the lower end of the lever 11 is caused to reciprocate in a vertical direction. This causes the upper end of the lever 11 to approach and recede from the carrier ring 3 and, consequently, the circular ro'w of teeth 6.

A casing 19 is provided with a neck 20,

and these two arts together are provided- Mounted upon the neck 20 is a stationary plate 22 and extending over the latter is a projecting portion 23 ofthe oscillatory ring 2. Mounted upon the projecting portion 23 is a boss 24, and disposed adjacent to the latter is an arm 25 which, in any desired manner, is given a reciprocating motion. The movements of the arm 25, by actuating the projection 23 in one direction, causes the oscillatory ring 2 to turn in said direction. For the 1purpose of retracting the oscillatory ring 2 provide a spiral ring 26 which is connected with a post 27, the latter *being secured directly upon the plate 22 and, consequently, being stationary. Another post 28 is inounted upon the plate 22 and journaled upon this post is a pawl 29, this pawl being in the same plane as the circular row of teeth 5. Aspring 30 is connected with the pawl 29' and 15 also connected with a 0st 31, .the latter being mounted upon the. p ate e purpose of Supporting the ioseillatory'ring 2 I provide a spider 32. -This spider is provided with a slot 32 and fitting spring also engages the lever lland tends to move this lever in normal position.

The oscillatory ring 2 rests upon the spider 32 which in turn practically hangs from the pivot pin 34L, the latter being suspended from the supportmg tongue 83, the spider 32 being provided with a slot 32" for accommodating this supporting tongue. The pur-.

pose in thus securing the oscillatory ring 2 I is to give it due freedom of movement without the necessity for the supporting ,mechanismbeing in the way of the operator, or of moving parts of the machine.

The stitch plate 9- is provided with an opening 35 to enable it to be fitted and held in position, [and isv further provided with channels36 for guiding the upper edge" of the weld The stitch plate- Q'isxfurther pro- -videdxwith a lip 37 integral with it, and is i also, rovided witha' channel 38 adjacent to r this: ip. At 39 is an opening and at 4:0 is a I ,slo'tmergin'ginto, this opening. The chan- .35

nel 38 serves asaguide for the welt.

-At i1 is al sewingmachine needle which is curved. "Atfii2la strip of leather to be sewed upona1 piece; of. stock 4:23'this piece of stock-being-l'for this purpose "provided with a 'poi 'ition l2 so that this portion, the

j strip of --leather a2 and the weltmay be readily sewed togethenas indicated in Fig. 3.

,Theoperation of my; device is as follows: The rotary motion being communicated to the cam 17, this cam rocks the lever 15 in a {Vertical plane. This lever communicates motion to the lever 11,.causing the same to 'rock upon the pivot 12. 'A reciprocating motion being given by the arm 25 and boss 2 L to the osclllatory ring 2, this ring turns back and forth, being forced inone direction by thearm 25 and retracted by the spring 2b.] 'lll 'zichtim e'the rocking lever 15 allows themwaiefi of the lever 11 to descend, the

jaw engages the welt 7 and grips it tightly against the circular row of teeth 6. At the i instantthis occurs, 'the oscillatory ring 2 welt. The result is that as the oscillatory I 1-1 1 slightly in clockwise direction ac- .cordirig-to Fig.4, being actuated by a movement of the arm 25 againsttheboss 24, and

this is followed immediately afterward by relaxation of the jaw-43 relatively to the ring 2 travels in one direction, it carries with 1t the welt l7 whichis momentarily secured wares .step, ahdthe welt is fedwstep by step, in response to the movement of the oscillatory ring. The thrust of the needle 41 takes place while the welt is stationary.-

From the above description it will be seen,-

therefore, that Ihave produced a device for feeding the welt with a positive motion stepby step, there being little or-no chance forthe welt to retrograde,- and in doing this, after each movementthe device holds the welt firmly in asuitable position to enable the curved needle to pierce the welt.

Having-thus described my invention, I claim as new and desire to secure by Letters Patent-: I

1. In a welting machine, thecombination of an oscillatory ring, a carrier ring movable therewith in one direction, means for preventing retrogression of said carrier ring relatively to said oscillatory ring, mechanism for guiding a welt toward said carrier ring, a lever pivotally mounted upon said carrier ring, a jaw mounted upon said lever and adapted to engage and disengage said welt, and means for actuating said lever.

2. The combination of a carrier ring,

means for turning the same step by step,a

lever providedwith an opening disposed adjacent to said carrier ringrand adapted for feeding a welt through said opening to said carrier ring, means for turning said carrier ring and said lever upon an axis common to said carrier ring, mechanism for retracting saidlever, and a pawl for preventing retrogression of said carrier ring. I

3. The combination of an oscillatory ring, means for actuating the same a carrier ring mounted upon said oscillatory ring and turned thereby in one direction, meansfor. retracting said oscillatory ring after each movement of the same,a lever mounted upon said oscillatory ring and provided with l a 'jZtW for forcing a welt against said carrier ring while said oscillatory ring is being turned-1n one direction, and'mechanlsm for actuating said lever for the purpose of cause ing said jaws to alternately engage and disengage said welt. I

, 4. Theicombination of an oscillatory ring, a pivotal support therefor, a lever mounted upon said oscillatory ring and adapted to turn therewith as said 'oscillatory ring is rocked, said lever being provided with a portion extending intolthea'xis of rotation of i said oscillatory ring, a movable'memberextending across the axis of rotation of said oscillatory ring for the purpose of actuating said lever, a aw mounted upon said lever and adapted to engiige a Welt, a carrier rin Signed by me a't- Copenhegeh,.-Denmark, loose relatively to said oscillatory ring aria this 3rd dayofSeptember, 1908. disposedin the plane of said jaw for the i I v purpose of receiving said Welt, mechanism U LABSEN' carried by said oscillatory ring for turniflg Witfiesses:

said carrier ring, and-means for preventing CHARLES HUDE,

retrogression of said carrier ring. J 8 WQLSING.

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