US3393712A - Releasable thread clamp - Google Patents

Releasable thread clamp Download PDF

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Publication number
US3393712A
US3393712A US541618A US54161866A US3393712A US 3393712 A US3393712 A US 3393712A US 541618 A US541618 A US 541618A US 54161866 A US54161866 A US 54161866A US 3393712 A US3393712 A US 3393712A
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US
United States
Prior art keywords
thread
clamping
clamp
stamp
stamps
Prior art date
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
Application number
US541618A
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English (en)
Inventor
Fransen Theodorus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Machinefabriek L te Strake NV
Original Assignee
Machf L Te Strake Deurne Nv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Machf L Te Strake Deurne Nv filed Critical Machf L Te Strake Deurne Nv
Application granted granted Critical
Publication of US3393712A publication Critical patent/US3393712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088—Clamping device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • a releasable clamp for clamping a thread in textile machinery comprising a pair of opposed clamping members, each having a thread-clamping surface, at least one of the clamping members being retractable from its threadclamping position to release the clamp, and a pair of abutments, one for each clamping member, each of which abutments is adjacent to the thread-clamping surface of its clamping member, and extends beyond such surface toward the thread when said one clamping member is retracted, so as to bend the thread away from the threadclamping surface in order to cause the thread to pull free from the thread-clamping surface by tension applied to the thread.
  • the invention relates to a releasable clamp to be used in conjunction with a thread.
  • Said clamp is provided with one or more stamps having a clamping surface for clamping a thread running along the stamps.
  • releasable thread clamps are used for holding a thread or to prevent a thread from sagging when no pull is exerted on the thread.
  • a thread is to be conveyed by means of air jet action e.g. in looms in which a weft is to be blown into the shed by means of air under pressure, the thread should be immediately freed when a clamping action of a thread clamp on the thread is released.
  • the object of the invention is to provide a releasable clamp for a thread in which the above mentioned drawback is avoided.
  • a releasable clamp for a thread according to the invention is characterized in that the stamps of the clamp cooperate with an abutment for the thread, which abutment projects from the clamping surface of the stamps in a direction towards the thread, when the clamp is released.
  • a practical embodiment according to the invention is attained in that the abutment is adapted as a wall of a passage for the thread and the stamp belonging to said wall can be retracted behind this wall when releasing the thread. It is advisable that the stamp be shaped as a core situated within the abutment.
  • the abutment and the concerning stamp be movable together in such a manner that the direction of movement of said abutment is opposed to the direction of movement of said stamp.
  • the abutment be shaped as a core positioned within the stamp.
  • FIG. 1 is a diagrammatical side view of a known clamp for a thread
  • FIG. 2 is a side view partially in section of the clamping part of a releasable thread clamp according to the invention showing a first embodiment in which stamps of the thread clamp are just opened for releasing the clamping action on a thread;
  • FIG. 3 is the same view as that of FIG. 2 in which the thread clamp is entirely opened;
  • FIG. 4 is a vertical section through a thread clamp according to the invention in a second embodiment, in which the clamp is closed to clamp a thread;
  • FIG. 5 is the same section as that of FIG. 4, in which the thread clamp is opened and the thread is released, and
  • FIG. 6 is a cross section of a thread clamp according to the invention in a third embodiment.
  • the stamps 1a and 1b are provided with an abutment 3a, 3b respectively.
  • the abutments 3a and 3b are adapted as a sleeve around the stamps 1a and 1b and the endfaces 4 of the abutments 3a and 3b are directed towards the thread 2 to confine the passage for the thread.
  • the stamps 1a and 1b are adapted as cores which are movable within the abutments 3a and 3b, respectively.
  • the stamps 1a and 1b are driven or controlled by means of a mechanism adapted for this purpose as known per se in clamps for a thread.
  • a typical mechanism for driving and controlling a pair'of stamps is shown in FIG. 5.
  • the stamps 5a and 5b which can be considered as jaws of a clamp are formed as hollow cylindrical members.
  • the clamping faces 6 of the stamps 5a and 5b are obtained by bending a rim of said stamps towards their centre.
  • the axially bent rim is adapted to enclose the movable abutments 7a and 7b within the stamps 5a and 5b.
  • the abutments 7a and 7b are provided with a shoulder 8 which remains behind the bent rim, which bent rim is adapted to form a clamping face 6 of each stamp.
  • the reduced part 9 of the abutment 7a will project through the central opening in the clamping face 6 by the weight of the abutment 7a when the stamps a and 5b are removed from each other as indicated in FIG. 5.
  • the abutment 7b is supported by a spring owing to which, the reduced part 9 of the abutment 7 projects also through the central opening in the clamping face 6 of the stamp 5b, when the clamp is released from the thread.
  • the pressure exerted by the spring 10 and the abutment 7b onto the thread 2 is considerably less than the pressure which is exerted on the thread by the stamp 5b when the thread is clamped between the stamps.
  • the clamping face 12 is the end face of a hood shaped clamping member 14, which can be displaced in axial direction within a housing 13.
  • the clamping face 12 is resilient, because the hood shaped member 14 is supported by a spring 15.
  • the clamping face 12 is lowered with respect to the edges 16 of the housing, which edges 16 form the boundaries of the passage for the thread.
  • the edges 16 act as an abutment to release the thread from the clamping face 12 when the thread tends to stick thereon after release of the pressure of the stamp 11.
  • a notch 18 is situated in the clamping face 17 of the stamp 11 and a pin 19 which is secured at both ends in the housing 13 fits into this notch.
  • the pin 19 enters the notch 18.
  • the pin 19 will release the thread 2 from the clamping face 17, when the thread tends to stick against the clamping face 17.
  • FIG. 5 shows a typical mechanism for driving and controlling a stamp.
  • the upper end of the stamp 5a is provided with a bore 20a in which is rotatably mounted a pin 21a which extends in an eccentric position from the end of a shaft 22a.
  • the shaft 22a is rotated by means of bevel gears 23a.
  • the stamp 5b is driven and controlled by a mechanism similar to that just described, which includes a shaft 22b, driven by bevel gears 23b, from the end of which extends an eccentric pin 21b that is rotatable in the bore 20b of the stamp 5b.
  • a mechanism similar to that just described which includes a shaft 22b, driven by bevel gears 23b, from the end of which extends an eccentric pin 21b that is rotatable in the bore 20b of the stamp 5b.
  • the bevel gears 23a and 23b which Operate the two stamps may be driven by a common shaft as indicated in FIG. 5.
  • a releasable clamp for clamping a thread in textile machinery comprising a pair of opposed clamping members, each having a thread-clamping surface, at least one of the clamping members being retractable from its threadclamping position to release the clamp, wherein the improvement comprises a pair of abutments, one for each clamping member, each of which abutments is adjacent to the thread-clamping surface of its clamping member, and extends beyond such surface toward the thread when said one clamping member is retracted, so as to bend the thread away from the thread-clamping surface in order to cause the thread to pull free from the thread-clamping surface by tension applied to the thread.
  • a releasable clamp according to claim 1 wherein an abutment is located outside of the thread-clamping surface of a retractable clamping member, in alignment with the path of the thread passing over such surface.
  • a releasable clamp according to claim 1 wherein an abutment is movable relative to a retractable clamping member in a direction opposed to the retracting movement of the clamping member, so as to extend beyond the thread-clamping surface of the clamping member toward the thread when the clamping member is retracted.
  • a releasable clamp according to claim 1 wherein an abutment is surrounded by the thread-clamping surface of its clamping member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Laminated Bodies (AREA)
  • Braking Arrangements (AREA)
US541618A 1965-04-15 1966-04-11 Releasable thread clamp Expired - Lifetime US3393712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6504919A NL6504919A (de) 1965-04-15 1965-04-15

Publications (1)

Publication Number Publication Date
US3393712A true US3393712A (en) 1968-07-23

Family

ID=19792952

Family Applications (1)

Application Number Title Priority Date Filing Date
US541618A Expired - Lifetime US3393712A (en) 1965-04-15 1966-04-11 Releasable thread clamp

Country Status (8)

Country Link
US (1) US3393712A (de)
BE (1) BE679205A (de)
CH (1) CH437165A (de)
DE (1) DE1535550A1 (de)
FR (1) FR1475572A (de)
GB (1) GB1139093A (de)
NL (1) NL6504919A (de)
NO (1) NO120363B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633711A (en) * 1968-10-23 1972-01-11 Sulzer Ag Thread brake
US4450874A (en) * 1981-01-07 1984-05-29 Leesona Corporation Yarn clamp
US4467841A (en) * 1980-09-02 1984-08-28 Aktiengesellschaft Adolf Saurer Clamping jaw arrangement of a thread clamp for textile yarns or the like
EP0625599A1 (de) * 1993-05-04 1994-11-23 Hacoba Textilmaschinen GmbH & Co KG Spulengatter
US5399837A (en) * 1994-04-06 1995-03-21 Genesis Systems Group, Ltd. Wire brake for robotic welding torch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1008058A3 (nl) * 1994-02-02 1996-01-03 Picanol Nv Inrichting voor het klemmen van een inslagdraad.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US466088A (en) * 1891-12-29 Charles a
US591044A (en) * 1897-10-05 Sewing-machine
US1042756A (en) * 1910-04-15 1912-10-29 Spirella Co Machine for making wire garment-stays.
US2209839A (en) * 1940-02-19 1940-07-30 Long John Russell Thread control device
US2624370A (en) * 1951-03-08 1953-01-06 Draper Corp Thread clamp
US2668560A (en) * 1949-04-02 1954-02-09 Ceskoslovenske Textilni Zd Y Device for weaving of fabrics
FR1336177A (fr) * 1962-07-05 1963-08-30 Sdruzeni Podniku Textilniho St Procédé de tissage pour métiers à tisser sans navette et métier pour la mise en application dudit procédé ou procédé similaire
US3269426A (en) * 1963-05-30 1966-08-30 Llado Jose Llado Weft braking and positioning device for shuttleless looms

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US466088A (en) * 1891-12-29 Charles a
US591044A (en) * 1897-10-05 Sewing-machine
US1042756A (en) * 1910-04-15 1912-10-29 Spirella Co Machine for making wire garment-stays.
US2209839A (en) * 1940-02-19 1940-07-30 Long John Russell Thread control device
US2668560A (en) * 1949-04-02 1954-02-09 Ceskoslovenske Textilni Zd Y Device for weaving of fabrics
US2624370A (en) * 1951-03-08 1953-01-06 Draper Corp Thread clamp
FR1336177A (fr) * 1962-07-05 1963-08-30 Sdruzeni Podniku Textilniho St Procédé de tissage pour métiers à tisser sans navette et métier pour la mise en application dudit procédé ou procédé similaire
US3269426A (en) * 1963-05-30 1966-08-30 Llado Jose Llado Weft braking and positioning device for shuttleless looms

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633711A (en) * 1968-10-23 1972-01-11 Sulzer Ag Thread brake
US4467841A (en) * 1980-09-02 1984-08-28 Aktiengesellschaft Adolf Saurer Clamping jaw arrangement of a thread clamp for textile yarns or the like
US4450874A (en) * 1981-01-07 1984-05-29 Leesona Corporation Yarn clamp
EP0625599A1 (de) * 1993-05-04 1994-11-23 Hacoba Textilmaschinen GmbH & Co KG Spulengatter
US5399837A (en) * 1994-04-06 1995-03-21 Genesis Systems Group, Ltd. Wire brake for robotic welding torch

Also Published As

Publication number Publication date
CH437165A (de) 1967-05-31
FR1475572A (fr) 1967-03-31
BE679205A (de) 1966-09-16
NL6504919A (de) 1966-10-17
NO120363B (de) 1970-10-05
GB1139093A (en) 1969-01-08
DE1535550A1 (de) 1970-08-06

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