US3047028A - Shredding means - Google Patents

Description

July 31, 1962 o. RoTRl-:KL 3,047,028

SHREDDING MEANS Filed Sept. lO, 1958 2 Sheets-Sheet 1 .V' w mi l@ QI July 31, 1962 `o. ROTREKI. 3,047,028

SHREDDING MEANS Filed Sept. lo, 1958 2 Sheets-Sheet 2 INVENTOR. atta 2 rua United States Patent O M 3,047,028 Sl-REDDING lViEANS Otto Ron-ekl, Brno, Czechoslovakia, assignor to Sdruzeni podniku textilniho strojirenstvi, Chrastava, Czecho- Slovakia Filed Sept. 10, 1958, Ser. No. 760,180 3 Claims. (Cl. 139-57) The invention relates to weaving looms and is concerned with. heald shaft raising devices for producing selectively a warp weave or weft weave of the woven cloth. A separate rotating cam is associated with each shaft which cam co-acts with shifting rods which are mounted in guides and serve for the movement of the heald shafts. According to the invention the shifting rods are cranked and the axis of rotation of the rotating cams lies in a plane formed by the straight portions of the cranked shifting rod, and a roller is provided at one end of the crank of the shifting rod, which roller co-acts with the cam. The change from warp weave to weft weave is then effected by turning of the shifting rod through 180 with respect to the rotary axis of the rotating cams. Weft weaves are characterized by the predominance of weft threads on the upper side of the woven fabric. Warp weaves are characterized by predominance of warp threads on the upper side `of the fabric.

As a result of this arrangement, the change from warp weave to weft weave may be effected with a single cam in a simple manner, whilst known cam-operated heald machines require two diiferent cams for this purpose.

A constructional example of a heald-shaft machine according to the invention is illustrated in the accompanying drawings.

FIG. 1 is a schematic fragmentary elevation illustrating the device in the position for a weft weave;

FIG. 2 is a fragmentary schematic elevation illustrating the device in a position yfor a warp weave;

FIG. 3 is a fragmentary schematic elevation illustrating the device provided with a spring and in the position for a warp weave, the upper position of the heald shaft being shown by chain lines in FIGS. l to 3;

FIG. 4 is a fragmentary schematic elevation of the device in the position for -a warp weave, the device having a cam with a cam groove; and

FIG. 5 is a fragmentary sectional View illustrating the cam arrangement of the device shown in FIG. 4.

The heald shaft 1 is actuated by means of` two tie rods 2. Each tie rod is articulated to an arm of a two-armed lever 3 which is pivotally mounted about a pivot pin 4 fixed to the frame of the machine. The other arm of the lever 3 is articulated to a connecting rod 5, which in turn is articulated by means of a link 1'1 to the cranked shiftingrrod 6 which is slidably guided in guides 7. A roller 8 mounted at one end of the cranked part of the rod 6 rolls over the circumference of a cam 9 which is rigidly connected to a shaft 10. As a result of the rotation of the shaft 10 and the cam 9, the heald shaft l is reciprocated up and down by means of the described leverage. The axes of the links 11 of the shifting rod 6, of the guides of the roller 8, andthe rotary axis 10 of the cams 9 lie in a common plane.

The roller 8 moves in succession over the points a, b, c, d of the cam 9 as shown in FIGURE l. This means that the heald shaft is in the lower shed position when the roller is in the region of the points a, b, d, and it is in the upper shed position when the roller is in the region of point c so that a weft weave is effected since the greater number of shafts 1 are located at the lower part of the shed while the remaining shafts (not shown) are located at the upper part of the shed. After the insertion of the weft, the successive shed has to be formed 3,41%@ Patented July 31, l 962 by reciprocating the position of the heald shafts from the raised position to the lowered position and vice versa. if the heald shaft mechanism is so arranged as to leave, during this changing procedure the major portion of the shafts in the raised position while a smaller portion remains in the lower position of the shed, a warp weave is obtained. if, however, the major portion of the shafts remains in the lower position of the shed a weft weave results.

If the shifting rod 6 is turned 180 with respect to the rotary axis of cam 9 to the position according to FIG- URE 2, then the heald `shaft 1 is in the lower shed position only in the region of point c and it is in the upper shed position in the region of the points a, b, d, so that a warp weave is obtained. The roller S of FIG. 2 may be maintained in engagement with the periphery of the cam 9 in any suitable way. For example, as shown in FIG. 3, a spring il may be connected to the supporting frame 7 and to an armof the right lever 3 to continuously urge the roller 8 toward the cam and thus maintain it at all times in engagement with the periphery of the cam. Also, as is indicated in FIGS. 4 and 5, the cam may be provided with a camming groove in which the roller 8 is located `so that this roller is confined to the groove and thus remains at all times in engagement with the periphery of the cam.

In this position, roller 8 positively co-acts with cam 9, and is, for example, guided in a ca-m groove 9a, -as shown in FIGS. 4 and 5. It is also possible to use a spring 12, see FIG. 3, to urge roller ,S in a conventional manner against the periphery of cam 9.

What I c-laim is:

1. In a heald shaft weavingmachine, in combination, a heald shaft movable between two positions for effecting a warp weave and a weft weave, respectively; linkage means connected to said heald shaft and being movable between two positions for shifting' said heald shaft between said positions; a pair of guide means aligned in a plane; shifting means including two supporting portions guided in said guide means -for movement in said plane and an intermediate connecting portion; a cam follower on said shifting means between one of said supporting portions and said connecting portion; and a rotary cam having an axis located in said plane between said supporting portions and having a cam portion of smaller eccentricity and a cam portion of greater eccentricity successively engaging said cam follower during rotation of said cam whereby said shifting means is shifted in said plane; and means for etachably connecting said supporting portions of said shifting means to said linkage means `so that upon turning of said shifting means with respect to said axis of said rotary cam through and interchange of sa-id supporting portions in said guide means different weaves are produced.

2. In a heald shaft weaving machine, in combination, i

a heald shaft movable between two positions for effecting a warp weave and a weft weave, respectively; linkage means connected to said heald shaft and being movable between two positions for shifting said heald shaft between said positions; a pair of guide fmeans aligned in a plane; shifting means including two supporting portions guided in said guide means for movement in said plane and an intermediate connecting portion; a cam follower mounted on said shifting means between one of said supporting portions and said connecting portion and in said plane; a rotary cam having an `axis located in said plane between said supporting portions and having a cam portion of smaller eccentricity and a cam portion of greater eccentricity spaced 180 and successively engaging said cam follower during rotation of said earn whereby said shifting means is shifted in said plane; and

means for detachably connecting said supporting portions of said shifting means to said linkage means so that upon turning of said shifting means with respect to said axis of said rotary Ycam through 180 and interchangeof said supporting portions ingsaid guide means different weaves are produced. s

, 3. In a heald shaft weaving machine, in combination, a heald shaftV movable between two positions for effecting a warp weave and a weft weave, respectively; linkage means connected to said heald shaft yand being ymovable between two positions for shifting said heald shaft beif lower during rotation of said cam whereby said shifting means is shifted in said plane; and means for detachably connecting said shifting means -to said linkage means so that upon turning of said shifting means with respect to said axis of said rotary cam through 180 different weaves are produced.

Y References Cited in the le of this patent UNITED'STATES PATENTS 59,613 Knowles Nov. 13, 1866 1,339,716 Sabbag E May 11, 1920 1,662,931 Lucas Mar.v v20, 1928 Y v FOREIGN PATENTS 1,901,012 France Feb. l19, 1952

Images