US3570547A - Ground warp shifting means for terry looms - Google Patents

Ground warp shifting means for terry looms Download PDF

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Publication number
US3570547A
US3570547A US834716A US3570547DA US3570547A US 3570547 A US3570547 A US 3570547A US 834716 A US834716 A US 834716A US 3570547D A US3570547D A US 3570547DA US 3570547 A US3570547 A US 3570547A
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United States
Prior art keywords
whip roll
roll
cloth
whip
plane
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Expired - Lifetime
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US834716A
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English (en)
Inventor
Douglas P Burgess
Gilmer A Williams
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Fieldcrest Cannon Inc
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Cannon Mills Co
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Assigned to FIRST NATIONAL BANK OF BOSTON THE reassignment FIRST NATIONAL BANK OF BOSTON THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CANNON MILLS COMPANY, A CORP OF NC.
Assigned to FIELDCREST CANNON, INC. reassignment FIELDCREST CANNON, INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: CANNON MILLS COMPANY, FIELDCREST MILLS, INC.
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D27/00—Woven pile fabrics
    • D03D27/02—Woven pile fabrics wherein the pile is formed by warp or weft
    • D03D27/06—Warp pile fabrics
    • D03D27/08—Terry fabrics
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms

Definitions

  • GROUND WARP SIIIFI'ING MEANS FOR TERRY LOOMS This invention is particularly concerned with improvements in that type of terry loom in which the cloth and ground warps are shifted forwardly and rearwardly, in alternation, to change the position of the fell of the cloth relative to the beat-up point of the reed in affecting the beat-up of loose picks and fast picks of filling in the formation of terry pile loops.
  • the cloth is shifted forwardly and permitted to be pulled rearwardly, in alternation, by means of an oscillatable cloth shifting roll or bar spaced above the cloth take up roll and carried by pivoted levers operated by a terry cam, as disclosed, for example, in Blanchards U.S. Pat. No.
  • Such ground warp shifting roll along with its supporting and operating structure not only increases the cost of construction and maintenance of a terry loom, but it presents an obstruction which interferes with exchanging the warp beams, manipulation of the ground and terry warps, and the performance of other corrective work by the weaver or loom fixer.
  • the whip roll had to be positioned rearwardly of its normal position to accommodate the additional warp-shifting roll, so that the operator had to reach that much further to install and manipulate the usual stop motion drop wires and to insert broken yarns in the heddles, etc.
  • FIG. 1 is a fragmentary side elevation of the rear portion of a terry loom showing a preferred embodiment of the improved ground warp shifting means of the instant invention is association with a positive ground warp letoff mechanism;
  • FIG. 2 is a fragmentary rear elevation of the loom, with portions broken away, looking substantially along line 2-2 of FIG. 1.
  • FIG. 3 is a schematic longitudinal vertical sectional view through the loom particularly illustrating mechanical connections between the whip roll shifting mechanism, the cloth shifting mechanism and a terry cam;
  • FIG. 4 is an enlarged fragmentary plan view of the cloth shifting means shown in the right-hand portion of FIG. 3, as embodied in means for shifting the cloth take up roll forwardly and rearwardly in alternation.
  • the present invention is shown in FIG. 1 in association with the positive, variable-speed ground warp letoff mechanism 10 of a terry loom.
  • the terry loom may be of the shuttleless type, such as a Draper DSL, a Sulzer," a MAV" loom or the like, or it may be of the well-known fly-shuttle type.
  • the loom may be conventional to the extent that it comprises a frame including a left-hand and right-hand side frame members ll, 11' whose rear portions rotatably support a ground warp beam 13 from which tensioned ground warps W pass upwardly in engagement with and over a letoff tension sensing member or whip roll 14.
  • whip roll 14 performs its usual function of sensing variations in tension in the ground warps W and controlling the ground warp letoff mechanism 10 in response thereto, the supporting means and operating means for the whip roll 14 are peculiar to the instant invention as will be later described. 1
  • terry pile warps T extend downwardly from a suitable source, such as a terry warp beam, not shown, and then pass partially around and beneath a terry warp guide roll 15.
  • a suitable source such as a terry warp beam, not shown
  • the ground warp W and terry warps T extend forwardly through suitable stop motion drop wires 20 (FIG. 3), shed forming means or heddles 21, and an oscillatable reed 22.
  • the forward ends of the warps T, W are connected to the fell of the cloth C at the beat-up point of a reed 22.
  • the cloth is advanced during weaving over a conventional cloth takeup roll 23 and then extends downwardly to be rolled up on a suitable cloth roll 24, as is conventional.
  • any suitable means may be provided for shifting the cloth C forwardly to move the fell thereof forwardly of the beat-up point of reed 22 and thereby to facilitate a beat-up of loose picks of filling in the warp shed, and for permitting the cloth C to be pulled back, at least at the fell thereof, to return the fell to the normal beat-up point of reed 22 to facilitate the beating up of fast picks of filling incident to the formation of terry loops.
  • the cloth shifting means is shown as being of the type disclosed in said Burgess et al. U.S. Pat. Nor.
  • themeans for oscillating cloth takeup roll 23 comprises a takeup roll rocking device broadly designated at 25 shown in the form of a planetary gear system or differential gear unit including first and second or outer and inner sun bevel gears 31, 32 (FIGS. 3 and 4) loosely mounted on the shaft 23a of takeup roll 23'.
  • Sun gear 31 serves as an oscillatable member for positively oscillating or rocking takeup roll 23 without transmitting rotary motion to inner sun gear 32
  • gear 32 serves as a' rotary member for rotating takeup roll 23 and effecting normal increments of take up motion of the cloth without transmitting rotary motion to outer sun gear 31.
  • a cloth roll gear 34 is fixed to or formed integral with the hub of second sun bevel gear 32, and cloth roll gear 34 is driven by and constitutes an element of a conventional take up mechanism, other elements of which are not shown in the present drawings, but are clearly shown and described in said U.S. Pat. No. 3,351,096.
  • a pair of diametrically opposed planetary bevel gears 35 (FIG. 4) is disposed between and positioned in intermeshing relation with both sun gears 31, 32.
  • Planetary gears 35 are journaled on opposite ends of a block 36 keyed or otherwise secured on cloth roll shaft 23a.
  • a crank arm 37 on first sun gear 31 has the front end of a link 40 (FIG. 3) pivotally connected thereto, the rear end of which is pivotally connected to a lever 41 pivotally mounted on the loom frame, as at 42 (FIG. 3).
  • Lever 41 also has one end of a link 43 pivotally connected thereto and extending rearwardly to the lower end of a cam follower arm 44 having a follower 45 mounted thereon which engages the periphery of a driven terry cam 46.
  • the loom is provided with two of such terry cams, two follower arms and two followers adjacent opposite sides of the loom for purposes to be later described.
  • Each follower arm 44 extends upwardly and is pivotally mounted, as at 47, on the frame of the loom.
  • the upper portion of each follower arm 44 has a spring 50 connected thereto which serves to normally urge each follower 45 against the respective cam.
  • the ground warp letoff mechanism is a form of variablespeed unit and is shown in FIG. 1 as being of a type known as a Hunt Posi-Tension Let-Off, which is similar to that disclosed in Hunts U.S. Pat. No. 2,786,491, issued March 26, 1957.
  • the ground warp letoff mechanism may take other forms and, for example, may be of a type such as is disclosed in Reifenwallers US. Pat. No. 2,951,509, issued Sept. 6, 1960.
  • letoff mechanism 10 comprises a frame 55 in which input and output, or upper and lower, shafts 57 and 56 are joumaled and on which respective expansible or variable-speed pulleys 60, 61 are mounted.
  • Input shafts 56 is operatively connected to a constantly driven loom shaft 62 by suitable sprocket wheels 63,64 and an endless sprocket chain 65.
  • the expansible pulleys 60, 61 are interconnected by an endless belt 66.
  • Output shaft 57 is connected, by suitable gearing, not shown, in a gear box 67, to a pinion 70 which engages a large gear 71 on the corresponding end of warp beams 13 (FIG. 2).
  • Upper and lower pivot shafts 72, 73 joumaled in the frame 55 adjacent the pulleys 60, 61 have respective finger levers 74, 75 fixedly mounted thereon and engaging corresponding axially movable flanges of the respective pulleys 60, 61 proximal portions of finger levers 74, 75 being interconnected by a link 76.
  • Lower fingers lever 75 has a weight arm 77 integral therewith and projecting rearwardly therefrom and from which a suitable weight member or members 80 are suspended.
  • the lower pivot shaft 73 has a hub 81 fixed thereon to which the lower end of a cable 82 is clampingly secured.
  • the whip roll 14 has been mounted on arms secured to a shaft which a corresponding end of a lever was secured and the latter lever was connected to the upper end of the cable 82 so that the downward force applied to the cable by the weight member 80 substantially balanced the weight of the whip roll 14 and the pressure of ground warps W thereagainst. If the pressure of the ground warps W on the whip roll was increased, the weight member would be moved upwardly, allowing the belt 66 to move upwardly in the pulleys 60, 61 and thereby causing warping beam 13 to move slightly faster. Conversely, if the pressure of the ground warps W on the whip roll 14 was decreased, the weight member would move downwardly and the opposite action would occur.
  • whip roll 14 has the additional function of shifting the ground warps by permitting them to move forwardly with the cloth C whenever the cloth is advanced in the aforementioned manner to move the fell of the cloth a predetermined distance forwardly of the beat-up point of the reed, and to retract or move the ground warps W rearwardly as the cloth is permitted to move rearwardly to return the fell of the cloth to the beat-up position.
  • the fell of the cloth usually occupies a position forwardly of the beat-up point during two out of three picks of the loom in which loose picks of filling are inserted in the warp shed and beaten up to the beat-up point in spaced relation to the fell of the cloth being woven. Also, the fell of the cloth occupies substantially the same position as the beat-up point of the reed, during each third pick of the loom, in which a fast pick of filling is inserted in the warp shed and then beaten up against the fell of the cloth, thus pushing the now slackened terry warps T up to the fell and forming pile loops therefrom.
  • the whip roll of conventional loom is usually supported upon or joumaled in a pair of support arms fixedly secured on opposite ends of a transverse pivot shaft 86 mounted on the loom side frame members ll, 11 above warp beam 13.
  • the whip roll is mounted for movement in opposite directions, in alternation, in a plane angularly disposed with respect to that plane of motion of the whip roll in performing its function of sensing the tension in the ground warps and controlling the letoff mechanism. Therefore, reduced opposite ends of whip roll 14 are joumaled in bearing blocks 87 (FIG. 2) carried by medial portions of respective whip roll shifting levers on carrier arms 90.
  • each whip roll shifting lever 90 extends downwardly a substantial distance below the axis of whip roll 14 and is pivotally connected, as at 91, to a plate member or bar 92 suitably secured to or formed integral with a corresponding support arm 86 fixed on shaft 86.
  • Each whip roll shifting lever 90 also extends upwardly a substantial distance above the axis of whip roll 14 and has a longitudinally extending adjustment slot 94 therethrough for reception of an adjustable shoulder screw 95 on which the rear end of a corresponding link 96 is pivotally mounted.
  • a single terry cam 46 is shown in FIG. 3, as heretofore stated, it is preferred that a similar terry cam is provided adjacent the opposite side of the loom, along with corresponding follower 45 and follower arm 44 so that the links 96 extend forwardly from the respective whip roll shifting lever 90 and may be pivotally connected to respective follower anns 44 below the pivot points 47 thereof.
  • Bracket 100 is suitably secured to the forward portion of one of said support anns 85, or it may be secured directly on pivot shaft 86, adjacent the letolf mechanism 10.
  • the upper portion of bracket 100 has the rear portion of a control arm 101 suitably secured thereto, to the forward portion of which the upper end of cable 82 is connected.
  • guide roll 15 is shown positioned between upper portions of the whip roll shifting levers 90 in FIG. 2, guide roll 15 is not carried by levers 90, but may be supported by conventional or other means, not shown.
  • the amount of angular motion imparted to cloth takeup roll 23 in each instance is the same or substantially the same as the amount of forward and rearward motion imparted to whip roll 14 so that the tension in the ground warps W remains substantially constant.
  • this does not interfere with the function of whip roll 14 in controlling the operation of the ground warp letoff mechaniam 10.
  • the amount of forward and rearward movement imparted to whip roll 14 by terry cams 46 is so small as to have no adverse affect on the control of the ground warp positive letoff mechaniam by whip roll 14.
  • whip roll 14 which permits the whip roll to form a bight in the ground warps W and to move in a first plane generally perpendicular with respect to the ground warps W engaged thereby in accordance with variations in the tension of the ground warps and we have also provided means operatively connected to the whip roll for shifting the same in opposite directions in alternation in a second plane angularly disposed relative to the first plane substantially in unison with respect to forward and rearward movement of the cloth as effected by the cloth takeup roll rocking device 25,-and wherein the extent and plane of the shifting movement movements of the whip roll are such that as to move the ground warps forwardly and rearwardly substantially the same amounts as the cloth is moved by the cloth-shifting means embodied in the cloth takeup roll rocking device 25.
  • control means including a whip roll for controlling the tension in the ground warps with the whip roll engaging and forming a bight in the ground warps, and wherein the whip roll moves in a first plane generally perpendicular with respect to the ground warps engaged thereby to sense variations in the tension of the ground warps; the combination therewith of means operatively connected to said whip roll for shifting the same in opposite directions in alternation in a second plane angularly di s sed relative to said first plane substantially in unison wit the 'and rearwardly substantially the same amounts as the cloth is moved by said cloth shifting means.
  • said loom includes a warp beam supplying said ground warps, said control means also including a driven variable speed letofi' mechanism driving said beam, a pair of whip roll support arms supporting said whip roll and being operatively connected to said mechanism for controlling the same and normally biased in said first plane and urging said whip roll against the ground warps by said mechanism, said'means operatively connected to said whip roll including carrier arms pivotally supported by the respective whip roll support arms, bearing means carried by said carrier arms and in which opposite ends of the whip toll are rotatably mounted, and means operatively connected to said carrier arms for pivoting the same in said opposite directions in said second plane in alternation and at predetermined intervals.
  • said control means further comprising a pair of support arms pivotally mounted to the loom adjacent opposite ends of said whip roll and normally biased upwardly, said means operatively connected to said whip roll comprising a pair of carrier arms supporting opposite ends of said whip roll and having lower portions pivotally supported by said support arms on axesspaced below the level of the pivotal axes of said support arms, rotary cam means driven by the loom, follower means engaging said cam means, and means operatively connecting said follower means to said carrier arms for shifting the same in said opposite directions in said second plane relative to said support arms.
  • said means operatively connected to said whip roll comprises a transverse shaft rotatably supported by the loom, a pair of support arms fixed on and extending rearwardly from said shaft adjacent opposite sides of the loom, a pair of carrier arms pivotally sup ported by said support arms for movement in said second plane about respective substantially horizontal pivotal axes spaced below and rearwardly of the axis of said shaft, means rotatably mounting opposite ends of said whip roll on said carrier arms adjacent and rearwardly of said shaft; rotary terry cam means operatively connected to said carrier arms for moving the same forwardly and rearwardly in alternation to impart like movement to said whip roll at predetermined intervals, said loom having a warp beam from which said ground warps extend to and over said whip roll, and said control means further comprising a variable speed ground warp letoff mechanism drivingly connected to said warp beam and including a weighted arm for varying the output of speed of said letoff mechanism in response to movement of said weighted arm,
  • line 7 should be -1etoff; Column 1, line “the” (first occurence) should be --such-, lines and 14, "take up” should be take-up-, lines 29 and 32, “takeup” should be -takeuplines 20, 21, 25, 51, 59 and 72, "letoff” should be let-off, line 21 “mechanism” should be “mechanismsline 55, omit “toll”, line “alteration” should be alterna.tion-, line 73, after “FIG. 2" insert (Sheet 2), line 74, "of” should be in-; Column 2, line 5, after FIG.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Pyridine Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
US834716A 1969-06-19 1969-06-19 Ground warp shifting means for terry looms Expired - Lifetime US3570547A (en)

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US83471669A 1969-06-19 1969-06-19

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US834716A Expired - Lifetime US3570547A (en) 1969-06-19 1969-06-19 Ground warp shifting means for terry looms

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US (1) US3570547A (enrdf_load_stackoverflow)
JP (1) JPS4948575B1 (enrdf_load_stackoverflow)
AT (1) AT289675B (enrdf_load_stackoverflow)
BE (1) BE752203A (enrdf_load_stackoverflow)
CH (1) CH502458A (enrdf_load_stackoverflow)
DE (1) DE1953470A1 (enrdf_load_stackoverflow)
FR (1) FR2052254A5 (enrdf_load_stackoverflow)
GB (1) GB1281600A (enrdf_load_stackoverflow)
NL (1) NL6918269A (enrdf_load_stackoverflow)
NO (1) NO128496B (enrdf_load_stackoverflow)
SE (1) SE350286B (enrdf_load_stackoverflow)
ZA (1) ZA697054B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536671A (en) * 1976-07-05 1978-01-21 Iwama Shiyotsuki Seisakushiyo Winding device of loom
JPS536672A (en) * 1976-07-05 1978-01-21 Iwama Shiyotsuki Seisakushiyo Winding device of loom
US10344407B2 (en) * 2016-10-18 2019-07-09 Wowwee Group Ltd. Interactive loom

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737688A (en) * 1929-12-03 Setts
US3130756A (en) * 1961-01-05 1964-04-28 Fieldcrest Mills Inc Terry motion for looms
US3351096A (en) * 1967-03-20 1967-11-07 Cannon Mills Co Terry loom with fell shifting means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737688A (en) * 1929-12-03 Setts
US3130756A (en) * 1961-01-05 1964-04-28 Fieldcrest Mills Inc Terry motion for looms
US3351096A (en) * 1967-03-20 1967-11-07 Cannon Mills Co Terry loom with fell shifting means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536671A (en) * 1976-07-05 1978-01-21 Iwama Shiyotsuki Seisakushiyo Winding device of loom
JPS536672A (en) * 1976-07-05 1978-01-21 Iwama Shiyotsuki Seisakushiyo Winding device of loom
US10344407B2 (en) * 2016-10-18 2019-07-09 Wowwee Group Ltd. Interactive loom

Also Published As

Publication number Publication date
DE1953470A1 (de) 1970-12-23
ZA697054B (en) 1971-05-27
JPS4948575B1 (enrdf_load_stackoverflow) 1974-12-21
CH502458A (de) 1971-01-31
SE350286B (enrdf_load_stackoverflow) 1972-10-23
AT289675B (de) 1971-05-10
FR2052254A5 (enrdf_load_stackoverflow) 1971-04-09
NO128496B (enrdf_load_stackoverflow) 1973-11-26
GB1281600A (en) 1972-07-12
BE752203A (fr) 1970-12-18
NL6918269A (enrdf_load_stackoverflow) 1970-12-22

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AS Assignment

Owner name: FIRST NATIONAL BANK OF BOSTON THE

Free format text: SECURITY INTEREST;ASSIGNOR:CANNON MILLS COMPANY, A CORP OF NC.;REEL/FRAME:004558/0066

Effective date: 19860130

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Owner name: FIELDCREST CANNON, INC.

Free format text: MERGER;ASSIGNORS:CANNON MILLS COMPANY A NC CORP (INTO);FIELDCREST MILLS, INC., A DE CORP (CHANGED TO);REEL/FRAME:004637/0166

Effective date: 19860306

Owner name: FIELDCREST CANNON, INC., NORTH CAROLINA

Free format text: MERGER;ASSIGNORS:CANNON MILLS COMPANY;FIELDCREST MILLS, INC.;REEL/FRAME:004637/0166

Effective date: 19860306