US3583142A - Radially clamping grips - Google Patents

Radially clamping grips Download PDF

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Publication number
US3583142A
US3583142A US882946A US3583142DA US3583142A US 3583142 A US3583142 A US 3583142A US 882946 A US882946 A US 882946A US 3583142D A US3583142D A US 3583142DA US 3583142 A US3583142 A US 3583142A
Authority
US
United States
Prior art keywords
flexible filaments
filaments
slot
flexible
slots
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
US882946A
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English (en)
Inventor
Claude Guignard
Jean Pellaton
Maurice Poull
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.)
Electrospin Corp
Original Assignee
Electrospin Corp
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 Electrospin Corp filed Critical Electrospin Corp
Application granted granted Critical
Publication of US3583142A publication Critical patent/US3583142A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • D01H7/923—Spinning or twisting arrangements for imparting transient twist, i.e. false twist by means of rotating devices
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques

Definitions

  • a centrally apertured rotatable gripping device for radially clamping an axially moving object with a plurality of flexible filaments fastened therein, the device having an angular series of slots for restricting the movement of each flexible filament to a fixed radial direction.
  • a central opening contains a plurality of flexible filaments extending therethrough to form an axial passageway for the object to be gripped.
  • Each filament has an arched portion and a straight portion, the arched portions, when combined, form a bow net of circular cross section and the straight portions lie parallel to each other in a bundle around the axis of the central opening.
  • a sleeve of some deformable material may be placed around the bundle of filaments to increase the elastic and damping properties of the device. In certain instances it has been deemed desirable to omit the sleeve and depend entirely upon the flexible filaments to provide the forces to grip the object. Although the compressive force required to radially clamp the yarn is relatively slight, the force must be evenly applied to the periphery of the yarn.
  • the filaments which furnish the clamping force must also be very small, as otherwise the space between the filaments would be too large for the yarn to be properly clamped.
  • the filaments are of fine gauge wire, a larger quantity is often necessary, with the disadvantage that the bundle may not open evenly to permit the yarn to pass through.
  • the lower ends of the filaments in the bundle could migrate circumferentially from the fixed upper point and allow the compressive forces to dissipate. Under these conditions the flexible filaments form ing the bundle are not symmetrically distributed around the yarn and the combined clamping force may be insufficient for the purpose.
  • the gripping device includes a rotatable body having radially extending slots in each ofwhich at least one flexible filament is engaged so that each filament is restrained from movement except within the confines ofa particular slot.
  • FIG. I is a view in longitudinal section of the invention
  • FIG. 2 is a cross section taken on line ll-ll in FIG. 1,
  • FIG. 3 is a view in longitudinal section of a modification of the invention shown in FIG. 1,
  • FIG. 4 is a view in longitudinal section ofa variation of FIG. 3, and
  • FIG. 5 is a cross section taken on line V-V in FIG. 4.
  • the clamping grip includes a body 1 having a head 2 with a hole 3 extending through both the body and head in an axial direction.
  • the upper portion of the hole 3 terminates in a funnel 4 which forms the inlet of the clamping grip.
  • Below the head 2 are several radially extending slots numbered 50 to 51 which extend downwardly through the remaining portion of the body I.
  • I2 slots are shown in FIG. 2, however, the number may vary and, although shown as being equally spaced, some other symmetrical arrangement could be used.
  • the slots lie in meridian planes which meet at the axis 6 of the hole 3 and they extend axially to the narrow end of the funnel 4.
  • a plurality of flexible filaments, 7a and 73 for example are distributed around the axis 6 so that the arched portion of each filament lies at least partially in a slot 5a5.
  • the arched portion Ba of the flexible filament 7a lies in slot 5a.
  • the end of the: arched portion of each flexible filament 7a7g etc. is embedded in a hole formed in the head 2, which holes are located in the planes of the slots 5a and SI.
  • FIG. 1 will be seen that the end of the arched portion 8a of the filament 7a is embedded in a hole located in the plane of slot 5a.
  • Each flexible filament is so embedded, and together they form a clamping member, having a bow net generally designated 10 of circular cross section which encompasses the funnel 4, and a bundle II with the straight portions extending through the hole 3.
  • each slot contains two flexible filaments so that the resilient force applied in a given plane is the sum of the two forces exerted by the filaments in a particular slot.
  • flexible filaments Ma and 15a each have an arched portion 12a and 13a respectively and together, with a plurality of flexible filaments, they form two bow nets I6 and 17. The straight portions of the flexible filaments which extend from the two bow nets merge into a bundle 18.
  • each slot can be distributed equally or arranged unevenly within the slots but in angular symmetry around the axis of the hole 3. This condition is shown in FIGS. 4 and 5 where every fourth slot, such as 20g, has three flexible filaments 21g, 22g and 23g and the intermediate slots, such as 200, have only two flexible filaments 21a and 22a. This distribution provides somewhat greater clamping force than the other two embodiments and the forces are distributed equiangularly about the gripped object.
  • This invention provides a clamping grip in which the forces exerted by all of the flexible filaments are directed in radial directions and the combined force can be increased by the application of other filaments in radial alignment within the slots.
  • a rotatable gripping device for resiliently radially clamping an object while allowing axial sliding motion therethrough, said device comprising a. a body having a longitudinal through hole terminating in an inlet funnel,
  • a gripping device as claimed in claim 1 wherein at least two said flexible filaments are engaged within each said slot, each said slot having an equal number offlexible filaments and the number of bow nets formed by the arched portions of said flexible filaments being equal to the number in each said slot.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Jigs For Machine Tools (AREA)
  • Treatment Of Fiber Materials (AREA)
US882946A 1969-01-17 1969-12-08 Radially clamping grips Expired - Lifetime US3583142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH61969A CH507387A (fr) 1969-01-17 1969-01-17 Pince à serrage radial permettant à l'objet pincé de glisser longitudinalement

Publications (1)

Publication Number Publication Date
US3583142A true US3583142A (en) 1971-06-08

Family

ID=4191213

Family Applications (1)

Application Number Title Priority Date Filing Date
US882946A Expired - Lifetime US3583142A (en) 1969-01-17 1969-12-08 Radially clamping grips

Country Status (6)

Country Link
US (1) US3583142A (fr)
JP (1) JPS5111698B1 (fr)
CH (1) CH507387A (fr)
DE (1) DE2002327A1 (fr)
FR (1) FR2030163B1 (fr)
GB (1) GB1245903A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664110A (en) * 1970-04-03 1972-05-23 Electrospin Corp Sliding radially-clamping gripper
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same
CN102704083A (zh) * 2012-05-30 2012-10-03 单水甫 一种导纱装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US733299A (en) * 1900-02-19 1903-07-07 George S Miner Spinning-machine.
US2908132A (en) * 1952-01-12 1959-10-13 Hans Berg Device for laying fencing material
US3270491A (en) * 1962-02-08 1966-09-06 American Enka Corp Apparatus for twisting yarn
US3372537A (en) * 1965-12-23 1968-03-12 Poull Maurice Radially clamping grips
US3408807A (en) * 1965-10-29 1968-11-05 Int Standard Electric Corp Twisting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US733299A (en) * 1900-02-19 1903-07-07 George S Miner Spinning-machine.
US2908132A (en) * 1952-01-12 1959-10-13 Hans Berg Device for laying fencing material
US3270491A (en) * 1962-02-08 1966-09-06 American Enka Corp Apparatus for twisting yarn
US3408807A (en) * 1965-10-29 1968-11-05 Int Standard Electric Corp Twisting machine
US3372537A (en) * 1965-12-23 1968-03-12 Poull Maurice Radially clamping grips

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664110A (en) * 1970-04-03 1972-05-23 Electrospin Corp Sliding radially-clamping gripper
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same
CN102704083A (zh) * 2012-05-30 2012-10-03 单水甫 一种导纱装置
CN102704083B (zh) * 2012-05-30 2015-04-22 单水甫 一种导纱装置

Also Published As

Publication number Publication date
FR2030163B1 (fr) 1974-05-24
JPS5111698B1 (fr) 1976-04-13
FR2030163A1 (fr) 1970-10-30
GB1245903A (en) 1971-09-15
DE2002327A1 (de) 1970-07-30
CH507387A (fr) 1971-05-15

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