US571236A

US571236A - Hulstgart

Info

Publication number: US571236A
Authority: US
Publication date: 1896-11-10
Anticipated expiration: 1913-11-10

Description

Nrrnn STATES ATENT Fries.

EDUARD VON'OBERLEITHNER, OF MAHRISCH-SGH@MBERG, AUSTRIA- HUNGARY.

LOOM.

SPECIFICATION forming part of Letters Patent No. 571,236, dated November 10, 1896. Application filed November 1, 1895. Serial No. 567,652. (No model.) Patented in Austria August 24, 1895, No. 45/2939- To aLZZ whom it may concern:

Be it known that I, EDUARD VON OBER- LEITHNER, manufacturer, a citizen of the Empire of Austria-Hungary, residing at Mahrisch-Schomberg, Moravia, Austria-Hungary, have invented certain new and useful Improvements in Looms, (for which I have obtained Letters Patent in Austria, No. 45/2,939, dated August 24, 1895;) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in figured fabric or damask looms, and provides improved harness mechanism for such looms.

At the present time figured or damask fabric is usually produced in such a manner that the pattern is lifted by the Jacquard machine and the ground-binding is obtained by means of treads and front mountings provided for this purpose. Of the front mountings, the number of which is dependent upon the ground-binding, on every pick one is lifted and another lowered when the Jacquard machine has lifted the warp-threads required for producing the pattern. The former causes those design warp-threads which retained their position to be bound, while the latter causes those design warp-threads to be bound which were lifted by the Jacquard machine.

The object of the present invention is to produce damask or figured fabric without the use of special mountings for the groundbinding.

The ground-bindin g according to this invention is produced by means of a special device operating directly on the harness-heddles.

In the accompanying drawings, Figure 1 shows a pespective of so much of my improved loom as is necessary for the understanding of my invention. Fig. 2 shows in side elevation, partly in section, a modification of the mechanism for actuating the parts of the divided harness-board.

In the drawings it is assumed that the ground-binding is that of eight-leafed satin.

1 to 8 indicate a series of lifting-wires of a Jacquard machine.

a are harness-cords.

c to c are the shafts.

(Z and f are the usual harness-boards.

e to e is an additional" harness-board divided into eight parts or rods with projections 0 to 0 and r to 1' At the right-hand side of these harness-board parts there are arranged springs s to 8 having a tendency to draw these rods to the right.

g is a crank-shaft.

7b is an eccentric with a connecting-rod '2'.

7c is a bell-crank lever. One of the arms of this lever is connected with the eccentric; the

other with the reciprocating knife Z.

on is a guide for the divided harness-board.

n to n are locking-pawls held against the divided harness-board by springs 13 to p and engaging with the projections a" to 0- The pawls n to n are connected by cords q to g with treadles or levers cc to 00 suitably arranged in the loom and serving for lifting out of engagement the said pawls. This lifting mechanism for actuating the shafts c to c and pawls n to n consists of levers :r to 0: pivoted in the frame and actuated by cams t to i set at equal angles on the shaft 1). Each of these levers is connected by a cord passing round a drum u with one of the shafts c to c and by other cords q to g with the pawls n to a acting on the bars 6 to e of the divided harness-board.- The parts are as shown so arranged that when one of the levers ac to a for instance 0: is depressed by the corresponding cam of the group i to t the corre sponding shaft 0 will be raised, while at the same time a pawl not corresponding to the raised shaft, for instance a .is caused to re lease its portion 6 of the divided harnessboard, such pawl being connected with the said lever m by a cord (1 There are as many lifting-levers as eccentrics t to i but only two are shown for the sake of clearness in the drawings.

It will be assumed that the jacquard has raised the lifting-

Wires

1, 2, 6, '7, and 8 for forming the pattern, but as the cord attached to 1ifting-wire 8 is straightened by shifting the corresponding portion 6 of the divided harness-board to the right the corresponding shaft 0 is allowed to remain in the lower shed for binding purposes, whereas the shafts 0', c c and c are raised in the upper shed, as required by the pattern. The return of the divisions of the harness-board is effected by the parts 71 i 7t" Z.

On pulling down one of the pawls n to 72 for instance, the pawl n and thereby releasing the projection 7' the division or rod c is pulled by its spring to the right, following the movement of the knife Z, which at this moment recedes by its projection 0 abutting against the edge of the knife. hen the knife Z returns, the pawl n again engages with the projection 4' and the division 6 is held in posiby the pawl or until it is again released by the cord q Fig. 2 shows a side elevation, partly in sec tion, of a modification of the mechanism for actuating the parts 0 to c of the divided harness-board. These parts are provided at their right-hand ends with springs having the tendency to draw them to the right, the same as in Fig. 1. At the left-hand end they are connected by cords with levers ZLmounted loosely side by side on a fixed shaft to.

Spring-controlled pawls or catches w, arranged side by side upon a second shaft a", lying parallel to the first-named shaft u, are adapted to engage with projections t arranged on the hubs of the aforesaid levers 25, and thus to cause these levers to keep the divisions of the divided harness-board drawn to the left, that is to say, in the position they occupy when the harness-threads are bent. The said spring pawls or catches are, by means of cams y, provided upon a drum 2, j ournaled in the framing of the loom, actuated in such a manner that whenever such a cam strikes the corresponding catch 10 the latter will release the corresponding lever t and will thus enable that part of the divided harness-board which is connected with it to move under the action of its spring to the right, so as to straighten the harness-cords as required for the ground-binding desired.

For returning the levers t and the appertaining parts of the divided harness-board to the normal position a curved piece or guard A is loosely mounted upon the lever-shaft a. This curved piece is by the intermission of the arm k set in reciprocating motion by means of a rod t connected with an eccentric upon the crank-shaft, and during its down- Ward movement it operates to return the released lever Z (by abutting against the projection '0 together with the corresponding part of the divided harness-board, to the normal position, upon which the corresponding spring pawl or catch to reengages with and again locks the lever. By the two movements, displacement of one part of the divided harnessboard 0 to c and lifting one of the shafts c, exactly the same eifect is obtained as was accomplished by the former damask attachments with front mountings by lifting and lowering the latter.

The cross-shed produced in previous devices with front mountings, which was very inconvenient for working, is entirely obviated in the new device.

I claim 1.. In aharness-board mechanism for producing figured fabric, the combination with two stationary harness-boards, of a divided harness-board composed of independently-movable members and mounted between said stationary boards,harness-cords passing through said harness-boards so as to be normally bent to an angle between the stationary harnessboards by the divided harness-board, means for imparting backward and forward motion to the members of said divided board-shafts connected to the lower ends of said harnesscords and means for raising and lowering said shafts, substantially as described.

2. In a mechanism of the character described the combination with two stationary harness-boards, of a divided harness-board mounted between said stationary harnessboards having a plurality of independentlymovable members with projections 011 the upper and lower faces of said members, springs connected to and exerting a backward pull on said members, means for holding said members against the pull of said springs, means for returning said members to their initial position after being drawn backward by said springs, harness-cords passing through said stationary and divided harness-boards so as to be normally bent to an angle between said stationary boards by said divided board, means for lifting said harness-cords, shafts connected to said cords below the said harness-boards, and means for simultaneously raising said shafts and releasing said members of the divided harness-board, substantially as described.

3. In a mechanism of the character described, the combination with stationary harness-boards, of a divided harness-board mounted between said stationary boards, having a plurality of independently-movable members, with projections on the upper and lower faces of said members, springs connected to and exerting a backward pull on said members, means for holding said members against the pull of said springs, means for re turning said members to their initial position after being drawn back by said springs, harness-cords passing through said stationary and divided harness-boards so as to be normally bent to an angle between said stationary boards by said divided board, means for raising said harness-cords from above, shafts c011- nected to the lower ends of said harness-cords beneath said harness-boards, a drum with lifting-cords passing over said drum and connected to said shafts, levers connected to the other ends of said lifting-cords, connection between said levers and means for holding said divided board members in initial position, cams mounted above and adapted to operate said levers, substantially as described.

4. In a mechanism of the character de scribed, the combination with two stationary harness-boards, of a divided harness-board mounted between the said stationary boards having a plurality of independently-movable members with projections on the upper and lower faces of said members, springs connected to and exerting a backward pull on the said members, pawls adapted to engage said lower projections, a reciprocating knife for returning said members to their initial positions by engaging said upper projections, harnessoords passing through said stationary and divided harness-boards so as to be normally bent to an angle between the stationary harness-boards by said divided harness-board, means for lifting said harness-cords from above, shafts connected to the lower ends of said harness-cords beneath said harness-