US3871416A - Arrangement for weaving with a half-closed shed in a loom - Google Patents

Arrangement for weaving with a half-closed shed in a loom Download PDF

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Publication number
US3871416A
US3871416A US393407A US39340773A US3871416A US 3871416 A US3871416 A US 3871416A US 393407 A US393407 A US 393407A US 39340773 A US39340773 A US 39340773A US 3871416 A US3871416 A US 3871416A
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US
United States
Prior art keywords
harness
change
pair
loom
linkages
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US393407A
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English (en)
Inventor
Sven Nyman
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AELMHULTS BRUK AB
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AELMHULTS BRUK AB
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Application filed by AELMHULTS BRUK AB filed Critical AELMHULTS BRUK AB
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/06—Double-lift dobbies, i.e. dobbies in which separate draw-knives or equivalent operate on alternate picks
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C2700/00—Shedding mechanisms
    • D03C2700/01—Shedding mechanisms using heald frames
    • D03C2700/0127—Programme-controlled heald frame movement
    • D03C2700/0133—Programme-controlled heald frame movement with mechanical transmission
    • D03C2700/0138—Programme-controlled heald frame movement with mechanical transmission using hooks or lifters
    • D03C2700/0155—Double-lift mechanisms

Definitions

  • ABSTRACT [30] Foreign Application Priority Data In a loom, an arrangement for weaving with a half- Oct. 3, 1972 Sweden 12726/72 Closed Shed an arrangement which during a harness change, the warp threads are caused to cross 52 1 us. c1. .1 139/72 and when there is harness change, the Warp threads [51] Int. Cl.
  • D03c l/06 are brought close together without reaching the plane 158 Field 01 Search 139/66-75 of the cloth in which there is Provided series of 139/63 vers and toggle linkages for converting a harness machine programme into required movements of the har- [56] References Cited ness, with the toggle linkages also being controlled by UNITED STATES PATENTS a drive dependent on the shuttle movement.
  • the open shed entails a simple harness arrangement but when the harness change is omitted, the warp threads stay stretched with the risk of breakage.
  • the present invention proposes a new arrangement in a machine weaving loom with a harness machine for carrying out weaving with a half-closed shed, meaning that when the harness change is omitted, the warp threads are brought close together without reaching the plane of the cloth.
  • the invention provides an arrangement for weaving with a half-closed shed in a loom in which the harness change is controlled by a programming device, wherebythe warp threads, which are made to cross over during a harness change, are if there is to be no harness change brought by the harness close to each other without reaching the plane of the cloth, said arrangement comprising at least one pair of two-armed levers mounted on a common shaft, one arm of each of which levers is adapted to control the movement of the harness through an independent push rod and each lever having associated therewith;
  • FIG. 1 shows diagrammatically the thread course with an open shed
  • FIG. 2 shows the thread course with a closed shed
  • FIG. 3 shows diagrammatically the thread course with an arrangement according to the present invention, called a half-closed shed
  • FIG. 4 is a diagrammatic side view of a device for harness changing according to the present invention at the line IV-IV in FIG. 3;
  • FIG. 5 shows the device of FIG. 4 at the line VV in FIG. 3;
  • FIG. 6 shows the device of FIG. 4, at the line VIVI in FIG. 3;
  • FIG. 7 shows the device of FIG. 4 at the line VlI-VII in FIG. 3, and
  • FIG. 8 shows the device of FIG. 4 at the line VIII- VIII in FIG. 3.
  • FIGS. 4-8 show different stages in a harness change on a weaving loom with underpass harnesses, where the movements of each harness are controlled by a twoarmed lever 4, 5, whose movements themselves are determined by a programming device, for example, an endless roll-card chain, and whose movements are transmitted to the harness, for example, by a push rod 11.
  • the two-armed levers 4,5 are set into a reciprocating oscillation upon a common shaft 27 under the action of an eccentric 12, which rotates synchronously with the shuttle upon a shaft 26.
  • the eccentric I2 acts upon an arm 13, acting upon two arms 15, 16 of equal length, joined to each other by means of an articulated rod 14, and each fixed on its own shaft 19, with the shafts 19 being mutually parallel and rotatably mounted upon a frame.
  • the free end of each lever 5 is hingedly connected via equal length toggle linkages 9,
  • Each toggle linkage consists of two links 9, 10, or 24, 25, which are of substantially the same length and are joined to each other by a toggle joint 8.
  • Each member 9, 24, pivotably connected to the arms 17, 18, is provided at the joint 8 with a hook 6, 7, the openings of said hooks 6, 7 facing towards each other.
  • a three-armed lever l, 2, 3 for each harness is pivotably mounted upon a shaft 20, fixed to the frame parallel to the shafts 19.
  • One arm I of the lever is adapted to be operated by the programming device in such a way, for instance, through an articulated rod 21, as to swing between two end positions, one of which is shown in FIGS. 5 and 7 and the other in FIGS. 6 and 8, while FIG. 4 shows an intermediate position.
  • the other two arms 2, 3 of the lever are provided at their free ends with pins 22, 23, parallel to the shaft 20 and each of which is adapted to engage the correspond- I ing hook 6, 7.
  • the toggle joint 8 is so shaped that the links 9, l0 and 24, 25 can be folded up on the one but not on the other side.
  • the arms 15, 16 are so connected to the arms l7, 18 as to make the latter arms l7, l8 pivot under the action of the movement of the eccentric 12 in opposite directions between two end positions, one of which is shown in FIGS. 5 and 6 and the other in FIGS. 4, 7 and 8.
  • the eccentric 12 is adapted to make one revolution for every move of the shuttle, while the three-armed lever 1, 2, 3 alters its position only at the change of the harness positions, effected synchronously with the shuttle move in accordance with the pattern of the programming device (not shown).
  • the arrangement operates in the following way:
  • the three-armed lever l, 2, 3 is swung in the direction shown by the arrows A in FIG. 4.
  • the eccentric 12 will rotate, for example, in the direction of the arrow B and make the articulated rod 14 move in the direction of the arrow C, whereby it causes the arm 17 to swing in the direction of the arrow D and the arm 18 to swing in the direction of the arrow E.
  • said transmission means includes a hook mounted on each of said toggle linkages with the hooks facing each other and, a pivotal three-armed lever, one arm of which is hingedly connected to the programming device, and the two other arms of said three-armed lever being provided with pins adapted to respectively engage said hooks depending on the angular position of said three-armed lever, the programming device, being adapted to swing the lever during a harness change from one end position to another, but leave the angular position of said three-armed lever unaltered if there is no harness change.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US393407A 1972-10-03 1973-08-31 Arrangement for weaving with a half-closed shed in a loom Expired - Lifetime US3871416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE12726/72A SE367219B (en(2012)) 1972-10-03 1972-10-03

Publications (1)

Publication Number Publication Date
US3871416A true US3871416A (en) 1975-03-18

Family

ID=20296206

Family Applications (1)

Application Number Title Priority Date Filing Date
US393407A Expired - Lifetime US3871416A (en) 1972-10-03 1973-08-31 Arrangement for weaving with a half-closed shed in a loom

Country Status (7)

Country Link
US (1) US3871416A (en(2012))
JP (1) JPS5231986B2 (en(2012))
CA (1) CA990622A (en(2012))
CH (1) CH560261A5 (en(2012))
DE (1) DE2256140A1 (en(2012))
GB (1) GB1427078A (en(2012))
SE (1) SE367219B (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1516947B2 (de) † 2003-09-17 2012-08-29 Groz-Beckert KG Schaftantrieb für Webmaschinenschäfte

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100496U (en(2012)) * 1980-12-10 1982-06-21
EP0059232B1 (de) * 1981-03-02 1984-07-11 Stäubli AG (Stäubli SA) (Stäubli Ltd.) Schaftmaschine mit Hubgestänge für Webmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US448713A (en) * 1891-03-24 hattersley
US448714A (en) * 1891-03-24 hattersley
US3726324A (en) * 1969-11-13 1973-04-10 S Xaus Dobby machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US448713A (en) * 1891-03-24 hattersley
US448714A (en) * 1891-03-24 hattersley
US3726324A (en) * 1969-11-13 1973-04-10 S Xaus Dobby machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1516947B2 (de) † 2003-09-17 2012-08-29 Groz-Beckert KG Schaftantrieb für Webmaschinenschäfte

Also Published As

Publication number Publication date
JPS4971255A (en(2012)) 1974-07-10
CH560261A5 (en(2012)) 1975-03-27
CA990622A (en) 1976-06-08
DE2256140A1 (de) 1974-04-11
SE367219B (en(2012)) 1974-05-20
GB1427078A (en) 1976-03-03
JPS5231986B2 (en(2012)) 1977-08-18

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