US517129A - Mechanism foe looms - Google Patents

Description

3 Sheets-Sheet 1,

(No Model.)

C. H. THOMAS. SHEDDING MECHANISM FOR LOOMS.

Patented Mar. 27,1894.

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(No Model.) 3 Sheets-Sheet 3.

G. H. THOMAS. SHBDDING MECHANISM FOR LOOMS.

No.517 1.29. Patented Mar. 27,1894.

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STATES PATENT OFFICE.

CARL HEINRICH THOMAS, OF NEUGERSDORF, ASSIGN OR TO 0. A. ROSOHER,

OF ALTGERSDORF, GERMANY.

SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 517,129, dated March 27, 1894.

Application fikid December 1892- Serial No. 455,963. (No model.) Patented in Germany November 7, 1891,No. 63,815-

To aZZ whom it may concern.-

Be it known thatl, CARL HEINRICH THOMAS, a subject of the Emperor of Germany, residing at N eugersdorf, in the Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Shedding Mechanism for Looms, (for which Letters Patent in Germany, No. 63,815, bearing date November 7, 1891, were granted to O. A. Roscher, in Altgersdorf, Germany,) of which the following is a specification.

The object of my invention is to provide shedding mechanism by which the heddles of a loom harness are positivelyoperated through the introduction of pattern cards and cylinder; and for this purpose I provide mechanism to hold jacks, which are adapted to operate with their connecting devices the heddles of a loom harness, positively out of contact with the moving members of the shedding mechanism, when so required by the pattern cards.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation partly in section showing the shedding mechanism mounted in a frame supported by the loom proper, and also the harness. Fig. 2 is a view showing one of the swinging guide bars in elevation. Figs. 3 and 4 show one of the swinging guide bars in side elevation and also its operations. Figs. 5 and 7 are side elevations of the shedding mechanism showing the difierent positions of the operated parts mounted in the frame supported by the loom and Fig. 6 is a plan view of the shedding mechanism.

Referring now to the drawings for a further description of my invention, S are the heddles of a loom harness to be operated by my improved shedding mechanism assembled and mounted in a frame adapted to be attached to any kind of loom. Each of these heddles S is operated by cords attached to opposite edges of the heddle and a lever S fulcrumed to the frame of the loom in the usual, or any preferred manner, so that when one cord is drawn in one or the other direction,

the heddle pertaining thereto may be raised or lowered, or in other words, the shed may be opened or closed.

To operate the heddles S to form certain and predetermined figures in the fabric, cards 0 fed over a cylinder 0 are employed in the usual, or any preferred manner, to cause the engagement or disengagement of certain devices to be presently described.

On top of the loom are secured standards F and F held together by cross pieces f, f q andq' and at the rear of said standards is journaled a shaft h, bearing at its ends and outside of the standards two levers H, whereof one is provided with an extension h to which a connecting rod k is attached to escillate the lovers H and the similar disposed levers K hinged at their centers at the front ends and outside of the standards F and F by studsrk. Each set of levers H and K at opposite sides of the standards F and F are connected by the links 4; so that the lovers H and K move in unison. The two levers K are connected at their upper ends to a cross bar 7' and at their lower ends to a similar bar 'r, for purposes to be described. In the standards F and F between the levers K and H are formed ways m and m for guiding knives m located at the top of the standards and knives m located'near the bottom of the said standards, and these knives are connected to therespective ends of the levers H by links 2 and z. 1

For each heddle S is provided an arm Z rotatably mounted on a cross bar 0 and guided by a slotted connection as at o, and the top cord of each heddle is connected to a depending harness lever to hinged-on a cross rod 0 of the standards F and F, and each of these levers w is connected to its corresponding arm Z by a slotted connection as shown at u. To an extension of each jack arm l is pivoted a jack lever i carrying at its opposite ends jacks p and p which are adapted to engage with their hooked ends the knives m and m before mentioned. A rod or shaft (2 is provided between the standards F and F upon which a card frame D is rotatably mounted in the usual, or any preferred manner, and this frame D receives an oscillatory motion through link 01' from an eccentric of the loom, not shown. The card cylinder C is rotated by any suitable and known mechanism, for instance a pawl on one of the standards and a ratchet wheel on the shaft of the cylinder may be used so that when the card cylinder 0 is descending by the manipulation of the frame D, and after the needles n or 'n have left the cards thereof, the ratchet comes in contact with the pawl and drives the cylinder around to present another card at its upper face. Directly above this card cylinder 0 are provided vertical needles, which are held in the guides N and N of the frame, there are two needles n and n for each arm Z, and one needle for each jack p and p; the projection g on the needles n are adapted to engage the upper jacks 1), while the projections or hubs g on the needles 0?. engage the jacks 19, all the needles n and 01. however pass through long slots p provided in the jacks p and p, to allow a sliding movement of the jacks caused by the knives m or m, while the needles are held in their guides N and N.

Above the two series of jacks p and p are mounted swinging guide bars 8 and s which are attached to the lower ends of arms I) fastened to rock shafts b and I). These bars 8 and s are located above the hooked ends of the jacks p and p and are adapted to slide under the same, when the said jacks are lifted, by the action of springs I) attached to the upper end of the arms 17 and a member of the machine frame.

Stop arms a and c on the rock shafts b and b impinging against the cross-bars, q and q of the standards F and F are employed to limit the movement of the swinging guide bars 3 and 8 under the influence of the springs 5 These latter are moved either in or out of the path of the jacks p and p by bent levers a. and a. adjustably attached by screw nuts to the links 2 and 2'.

In describing the operation of my improved shedding mechanism, the co-operation of the devices pertaining to one harness heddlewill be stated.

In Fig. 5 are shown the positions of the different devices heretofore described, when the shed is open, and in Fig. 7 when the shed is closed. When the shed is closed the jack levers 11 lie against the cross bars f and f as in Fig. 7.

To open a shed, the needles n and n enter perforations in the cards 0 as the cylinderC is forced upward by its frame D and link d, so that the jacks p and 19' remain in their lowest positions as shown in Fig. 5; the knife m therefore is permitted to engage the jacks p and draw the same through the motion of the rock shaft h and levers H to the position as shown in Fig. 5. The lower ends of the respective jack levers 11 are thereby withdrawnfrom the cross barf, while the upper ends thereof still remain in contact with the bar f. The arms Z are thereby drawn at their upper ends to the right in Fig. 5 and the depending levers w connected to the arms I at 21. move also in that direction thereby raising the heddles S connected by cords to the respective levers 10. If it is desired to keep the shed open for the next pick or number of picks, the needles 'n and 7?. must again enter apertures in the card 0 so as not to raise the jacks p and p out of their lowest position; the levers H now moving in the opposite direction from that described before, the jacks p are drawn toward the right in Fig. 5 by the knife m, While the jacks p are drawn toward the left by the bar 7" impinging against the lower ends of the jack levers 2', without, however, moving the center or pivoted connection between the respective jack lovers 7 and their arms Z, the jack levers 'isim ply moving idle about their pivotal connection y with their respective arms Z. If heddles S are to be depressed, the corresponding needles n or n are raised by a non punctured part of the cards 0 on the cylinder 0 while the latter is moved upward by its frame D as described, and the hub or projection g or g on the needle elevates the respective jack p or At the same time the desired jack is lifted, the levers H commence to turn say with their upper end to the right to release the bent lever a. of the link 2 to allow the swinging guide bar 3 to be shifted under the hooked ends of the elevated jacks p by the springs 11 as shown in Figs. 4 and 7. The hooked ends of the jacks 19 now resting on the swinging guide bar .9 impinge against the cross bar q and the levers H now turning farther in the direction stated, also turn the levers K in the same direction, and cause the thereto affixed cross bar 7" to move the jack levers '11 in the position shown in Fig. 7 thereby pushing the upper ends of the arms Z and with it the lower ends of the depending levers w toward the left Fig. 7, closing the shed. or rather lowering the desired heddle or heddles S. If it is desired to keep the shed closed for any time, the jacks p and p are alternately lifted, by the needles n and 'n' and the bars 8 or .9 hold the respective jacks in their raised positions, so that the knives 'm or m pass freely under the said jacks 19 or 19'.

Having thus described the nature and object of my invention, what I claim as new, and desire to secure by Letters Patent, is-

In shedding mechanism for looms, the combination with the dobby frame, the pivoted harness lever w, jack lever 1', jack arm Z connecting said levers, two series of hooked jacks, knives, and means for operating said knives, pattern cards and cylinder, rock shafts b I) provided with arms b bars 8 s pattern cylinder to indicate, substantially as [0 described.

Signed at Zittau, Saxony, this 25th day of October, 1892.

CARL HEINRICH THOMAS.

Witnesses:

OSKAR ALWIR BIELIGL EMIL FRITZSOHE.

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