US3561498A

US3561498A - Loom fringe motion

Info

Publication number: US3561498A
Application number: US792594*A
Authority: US
Inventors: Stanley C Tiernan
Original assignee: North American Rockwell Corp
Current assignee: Draper Corp; Boeing North American Inc
Priority date: 1969-01-21
Filing date: 1969-01-21
Publication date: 1971-02-09
Anticipated expiration: 1988-02-09

Abstract

A fringe motion for looms of the shuttleless type adapted to selectively control the omission of a number of picks during loom operation to produce, in continuance of normal weaving, nonwoven bands of warp yarns of a predetermined width.

Description

United States Patent [72] Inventor Stanley C. Tiernan 56] References Cit d Bellmgha'", Mass- UNITED STATES PATENTS [21] Appl. No. 792,594

3,276,482 10/1966 Liebchen 139/122 [22] Filed Jan.2l,1969

3,396,755 8/1968 NlChOlS et a1. 139/116 [45] Patented Feb.9, 1971 3457 966 7 1969 C 139122 [73] Assignee North American Rockwell Corporation U131 Pittsburgh, Pa. Primary Examiner-Henry S. J audon a corporation of Delaware Attorney-John R. Bronaugh [54] DOOM FRINGE MOTION 6 Claims 2 Drawing Figs ABSTRACT: A fringe motion for looms of the shuttleless type [52] [1.8. l 139/116 adapted to selectively control the omission of a number of [51 1 Int. Cl D03d 47/34 picks during loom operation to produce, in continuance of [50] Field of Search 139/25, 26, normal weaving, nonwoven bands of warp yarns of a predetermined width.

PATENTED FEB 9|97| CONTROLLER M m P W C V Y NE L m T 3 ma 0W ATTORNEY 1 LOOM FRINGE MOTION BACKGROUND OF THE INVENTION The invention pertains to a fringe motion for looms and,

I more particularly, to such a motion for looms of the shuttleless which upon finishing the fabric will form so-called fringes at the ends thereof. The mechanism according to the instant invention relates primarily to a means for permitting the loom to operate without inserting picks 'of filling yarn at predetermined points in the fabric as it is being formed.

SUMMARY OF THE INVENTION The fringe motion of the present invention is effective in preventing actuation of certain mechanicalfunctions during actual operation of the loom and according to a preferred form of the invention these functions are governed by the dictates of a controller unit such as shown and described in US.

Pat.No.3,29l,l58.

The invention includes a slidable guided rod having one end interconnected by means of a linkage member to the controller unit and the opposite end includes a pair of depending tine members disposed in spaced and aligned relation. This slidable guided rod is held in a rearwardly or withdrawn position by means of the linkage member and its connection to the controller unit. The rod is biased by spring means toward the front of the loom and upon an indication from the controller unit it is released and permits the biasing force to move it to an active or forwardly position. During this movement the depending tine members fixed on the forward end of the rod contact and move the filling yarn to a position out of reach of the filling depressor which is normally effective in presenting said filling to a carrier member for insertion into a warp shed.

The carrier members are permitted to continue operating without filling yarn and to prevent the loom from knocking off for lack of filling the controller unit is timed to deactivate the loom stop motion by a mechanism such as that shown and described in US. Pat. No. 3,396,755.

It is a general object of the invention to provide a method and means of forming fringe automatically at predetennined points on fabric as it is formed on looms of the shuttleless type.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view of a portion of a shuttleless loom showing the filling depressor and means according to the invention for displacing the filling.

FIG. 2 is a perspective view of part of the mechanism of FIG. 1 showing the member for displacing the filling being held in a withdrawn or inactive position.

DESCRIPTION OF THE PREFERRED EMBODIMENT As the general construction and operation of this type of loom is well known and familiar to those skilled in the art, and as the invention is entirely concerned with a means for selectively preventing the insertion of filling, it is only considered necessary here to illustrate and describe those parts of a loom directly concerned with a preferred form of the present invenguide 12 is fixedly attached to the loomside and serves to guide the filling inserting carrier I3 as the latter is inserted into sheds of warp threads 14 and then withdrawn therefrom.

The filling yarn is identified in FIGS. l and 2 by numeral 15 and is drawn from a stationary source of supply (not shown) disposed at the side of the loom.

The usual type friction device is utilized and includes a mounting bracket 16 (FIG. I) the forward end of which is fixedly attached to the side of the conventional filling control housing (not shown) that is situated on the right hand upper front portion of a shuttleless loom. Extending rearwardly, the opposite end of the mounting bracket I16 supports a friction plate bracket 17 on which a pair of vertically disposed spring biased friction plates 18 and 19 is assembled and which serves to keep the filling yarn 15 under tension as it is caused to pass therebetween. After passing between the friction plates 18 and 19, the filling extends across the upper surface of a horizontally disposed guide bar 20 and thence through an eyelet 21 provided in and adjacent the free end of a filling positioner arm 22. By means of a screw 23, the filling positioner arm 22 is attached to a double anned lever 24 that is caused to oscillate in a well-known manner to swing said positioner arm to and fro for placing the filling yarn 15 in the proper position for pickup by a filling depressor member 25.

During loom operation the filling depressor member 25 is continually moving in a vertical plane and forms somewhat of an elliptical path all of which is well known to those familiar with the art. As the depressor member moves downwardly from its uppermost position it is adapted to engage the filling yarn 15 and move it to a lower position where it is received by the filling inserting carrier 13 which then inserts it into the warp shed.

The filling extends from the eyelet 21 in the positioner arm 22 toward the cutter and binder device not shown, but which is carried by a controlled unit comprising a horizontally disposed spring biased rod 26 that .is caused to reciprocate by cam means carried in the aforementioned filling control housing (not shown). This unit also supports the so-called second pick positioner a portion of which is shown and identified in FIG. 1 by numeral 27.

Filling yarn is inserted into sheds in the form of interconnected pairs of picks or so-called hairpins with each length of pick being in a separate shed. On the first half of a pair of interconnected picks the end of the filling yarn is being held by the aforementioned cutter and binder device and the positioner arm 22 is in its rearmost position or in the position opposite that shown in FIGS. 1 and 2. When the second half of the hairpin is to be inserted, the positioner arm 22 is in its forward most position as shown in FIGS. l and 2 and the filling yarn extends through the second pick positioner to the edge of the fabric all of which is known to 'those familiar with shuttleless weaving.

The positioner arm 22 is caused to swing to and fro for positioning the filling for the first and second half of each hairpin and the point of intersection during this swinging movement of the filling which extends inwardly from said positioner arm is disposed so as to be within the pathway of the filling depressor arm 25. As the depressor arm moves downwardly, it catches thefilling and pulls it to a lower position for pick up by the in serting carrier.

The method and means according to the invention for forming unwoven bands of warp threads at predetermined locations in fabric as it is being formed, comprises a controlled device for moving the filling yarn out 'of the pathway of the depressor arm 25 while permitting the loom to continue operating without inserting picks of filling.

The controlled device is identified generally in FIGS. 1 and 2 by numeral 28 and includes a horizontally disposed slidable rod 29. Rod 29 is supported for sliding movement in a guide block 30 which is attached to a mounting bracket 31 the latter of which is suitably fixed to the upper end loom frame member partially shown and depicted in FIG. 2 by numeral 32.

The slidable rod 29 extends outwardly from each end of the guide block 30 and is provided on its forward end with a slot 33 which is adapted to support a pair of depending

tine members

34 and 35 disposed in spaced and aligned relation.

A screw 36 assembles in and adjacent the forward end of rod 29 and is so disposed as to pass through the slot 33 drawing the sides thereof into clamping engagement with and to fixedly position the

tine members

34 and 35. A collar 37 assembles on rod 29 by means of a setscrew 38 immediately adjacent to slot 33 and that portion of said rod extending between said collar and the guide block 30 supports a coil spring 39.

Rod 29 is restricted to longitudinal movement in the guide block 30 and rotation thereof is prevented by means of a key 40 which extends for substantially the full length thereof. A grease fitting 41 (FIG. 2) in the guide block 30 provides adequate lubrication to assure unrestricted sliding movement of the rod 29. Coil spring 39 is assembled on rod 29 under tension and is adapted to continually urge said rod toward its forward most position.

As shown in FIG. 2, a collar 42 is fixed by means of a setscrew 43, to rod 29 adjacent its rearward end and provides a means for limiting the forward longitudinal movement of said rod.

Control linkage 44, which may be in the form of a Bowden wire, is suitably attached to the rearward end of rod 29 as at 45 with the opposite end thereof being attached to and controlled by the dictates of a controller unit 46 such as shown and described in U. S. Pat. No. 3,291,158 heretofore referred In operation filling yarn is inserted into warp sheds in a manner well known to those conversant in the art of shuttleless weaving. The filling depressor arm moves continuously in an elliptical path and is timed to draw the filling yarn downwardly to a position for pickup by the inserting carrier which carries it into the warp shed.

On indication from the controller unit, the loom stop motion is deactivated as shown and described in the aforementioned US. Pat. No. 3,396,755. At this time the controller unit also gives an indication for release of the rod 29 that is being.

held in an inactive position by the control linkage 44. Release of rod 29 permits coil spring 39 to expand and in an attempt to seek'its free length it moves said rod in the direction of the indicating arrow 47 shown'in FIG. 1. This movement carries the depending

tine members

34 and 35 forwardly which are adapted to contact the filling yarn l5 and push it out of the pathway of the filling depressor arm 25. The filling depressor arm continues to follow its normal path of travel but fails to make contact with the filling and a band of unwoven warp threads are formed as the loom continues to operate.

When the width of this unwoven band reaches a predetermined size, normal weaving is resumed through indications from the controller unit. The first indication is effective in withdrawing rod 29 to an inactive position which compresses spring 39 in readiness for again moving said rod forwardly. A further indication activates the loom stop motion and normal weaving is resumed.

lclaim:

1. In a shuttleless loom of the type having a stationary external source of filling, reciprocable carrier means for inserting pairs of interconnected picks of filling from said source into separate sheds of warp yarns, and afilling presenting member adapted for movement in a path to contact and present said filling to said carrier means, mechanism for controlling the insertiori and omission of picks of filling in the sheds of warp threads during loom operation whichincludes:

a. means for guiding the filling in a predetermined path from said source of supply to a first position within the pathway of said filling presenting member for inserting the first half of a pair of interconnected picks;

b. guide means for moving the filling in afirst direction out of said predetermined path to a second position within the pathway of said filling presenting member for insertmg the second half of a pair of interconne cted picks; and c. a displacing means for moving the filling in a second direction away from said first and second positions and out of the pathway of said filling presenting member to prevent the insertion of picks into said sheds.

2. The mechanism as defined in claim 1 wherein said displacing means includes:

a. a patterned controller unit;

b. a filling displacing member for moving the filling to an inactive position out of the path of said presenting member; and

0. control linkage interconnecting said controller unit with said displacing member for selectively releasing the latter to engage and move said filling and for withdrawing and holding said member in position clear of said filling.

3. The mechanism as defined in claim 1 wherein said slidable filling displacing member includes a horizontally supported slidable rod having one end thereof interconnected with said controller unit by means of said control linkage.

4. The mechanism according to claim 3 wherein the-other end of said slidable filling displacing member includes a pair of depending tine members disposed in aligned and spaced relation for contact with and movement ofsaid filling to said inactive position.

5. The mechanism according to claim 4 wherein said slidable filling displacing member includes a spring member adapted to function in cooperation with said horizontally supported rod for continually urging said tine members in the direction of said filling.

6. A method of forming fringe on fabric in a shuttleless loom of the type having a stationary external source offilling, carrier means for inserting pairs of interconnected picks of filling from said source into separate sheds of warp yarns, and a filling presenting means adapted to travel in a path to contact and present said filling to said carrier means, said method including the steps of:

a. guiding the filling in a predetermined path from said source of supply to a first position within the pathway of said filling presenting means for inserting the first half of a pair of interconnected picks;

b. moving the filling in a first direction out of said predetermined path to a second position within the pathway of said filling presenting means for inserting the secondhalf of a pair of interconnected picks, and

c. moving the filling in a second direction away from said first and second positions and-out of the pathway of said filling presenting means to prevent the insertion of picks of filling into said sheds.

mg UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 ,56l,498 Dated February 9 197].

Inventor(s) STANLEY C TIERNAN It is certified that error appears in the above-identified patent: and that said Letters Patent are hereby corrected as shown below:

Column 4,

lines

28 and 29, delete "slidable".

Signed and sealed this 25th day of May 1971.

(SEAL) Attest:

EDWARD M.F'LETCHER,JR. WILLIAM E. SCHUYLFR, JR. Attesting Officer Commissioner of Patents

Claims

1. Ien a shuttleless loom of the type having a stationary external source of filling, reciprocable carrier means for inserting pairs of interconnected picks of filling from said source into separate sheds of warp yarns, and a filling presenting member adapted for movement in a path to contact and present said filling to said carrier means, mechanism for controlling the insertion and omission of picks of filling in the sheds of warp threads during loom operation which includes: a. means for guiding the filling in a predetermined path from said source of supply to a first position within the pathway of said filling presenting member for inserting the first half of a pair of interconnected picks; b. guide means for moving the filling in a first direction out of said predetermined path to a second position within the pathway of said filling presenting member for inserting the second half of a pair of interconnected picks; and c. a displacing means for moving the filling in a second direction away from said first and second positions and out of the pathway of said filling presenting member to prevent the insertion of picks into said sheds.

2. The mechanism as defined in claim 1 wherein said displacing means includes: a. a patterned controller unit; b. a filling displacing member for moving the filling to an inactive position out of the path of said presenting member; and c. control linkage interconnecting said controller unit with said displacing member for selectively releasing the latter to engage and move said filling and for withdrawing and holding said member in position clear of said filling.

4. The mechanism according to claim 3 wherein the other end of said slidable filling displacing member includes a pair of depending tine members disposed in aligned and spaced relation for contact with and movement of said filling to said inactive position.

6. A method of forming fringe on fabric in a shuttleless loom of the type having a stationary external source of filling, carrier means for inserting pairs of interconnected picks of filling from said source into separate sheds of warp yarns, and a filling presenting means adapted to travel in a path to contact and present said filling to said carrier means, said method including the steps of: a. guiding the filling in a predetermined path from said source of supply to a first position within the pathway of said filling presenting means for inserting the first half of a pair of interconnected picks; b. moving the filling in a first direction out of said predetermined path to a second position within the pathway of said filling presenting means for inserting the second half of a pair of interconnected picks; and c. moving the filling in a second direction away from said first and second positions and out of the pathway of said filling presenting means to prevent the insertion of picks of filling into said sheds.