US3411400A - Spliced loop and method of formation thereof - Google Patents

Spliced loop and method of formation thereof Download PDF

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Publication number
US3411400A
US3411400A US665793A US66579367A US3411400A US 3411400 A US3411400 A US 3411400A US 665793 A US665793 A US 665793A US 66579367 A US66579367 A US 66579367A US 3411400 A US3411400 A US 3411400A
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Prior art keywords
bundles
filaments
rope
loop
uncovered portion
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US665793A
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Morieras Gilbert
Lanauze Michel Sere De
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Rhodiaceta SA
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Rhodiaceta SA
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/18—Grommets
    • D07B1/185—Grommets characterised by the eye construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/02—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cables; Fastening means which engage a sleeve or the like fixed on the cable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/04—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps
    • F16G11/044—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord
    • F16G11/046—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord by bending the cable around a surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/14—Devices or coupling-pieces designed for easy formation of adjustable loops, e.g. choker hooks; Hooks or eyes with integral parts designed to facilitate quick attachment to cables or ropes at any point, e.g. by forming loops

Definitions

  • the invention describes a spliced loop in a textile rope, and method of making such a loop, in which the rope consists of a plurality of parallel textile core filaments covered by an envelope and comprising a first uncovered portion of said rope from which the envelope has been removed adjacent the free end thereof, a second uncovered portion of said rope, from which the envelope has been removed spaced from said first portion, at least two bundles of filaments in said second uncovered portion, and at least two bundles of filaments in said first uncovered portion, braided with said at least two bundles of said second portion.
  • the present invention relates to a spliced loop formed at the end of a textile rope, and also to a method for the manufacture thereof.
  • a rope which consists of an assembly of parallel textile filaments, generally of synthetic origin and constituting a core, covered by an envelope, which is for example braided or extruded around the said core.
  • An example of such a rope is described in French Patent specification No. 1,327,110.
  • these ropes are lighter due essentially to the absence of shortening (stranding) and, consequently, by greater strength for equal diameter or weight.
  • stranding shortening
  • they stretch only to a small degree and, relatively to stranded ropes, they exhibit above all permanent antigiratory properties.
  • a terminal splice also known as a spliced loop
  • the free end of the rope, the dead strand is unstranded or unbraided as the case may be, and is interlaced with the live strand at a distance equal to the developed length of the loop which it is desired to form.
  • This interlacing operation which is a delicate operation and one which requires a considerable amount of time to eilect, is carried out with the aid of a manual apparatus known as a splicerf Due to the interlacing of the filaments of the dead strand with those of the live strand, the cabling and stranding torsions maintain the assembly in equilibruim.
  • the spliced loop formed is then selflocking.
  • a spliced loop in a textile rope in which the rope consists of a plurality of parallel textile core filaments covered by an envelope and comprising a first uncovered portion of said rope from which the envelope has been removed adjacent the free end thereof, a second uncovered portion of said rope, from which the envelope Patented Nov. 19, 1968 Ice has been removed spaced from said first portion, at least two bundles of filaments in said second uncovered portion, and at least two bundles of filaments in said first uncovered portion, braided with said at least two bundles of said second portion.
  • the invention also provides a method of forming a spliced loop in a textile rope consisting of a plurality of parallel textile core filaments covered by an envelope, such method comprising stripping the envelope from the core adjacent a free end of the rope to provide a first uncovered portion of said core filaments, stripping the envelope from the core at a position spaced from said first uncovered portion to provide a second uncovered portion of said core filaments, collecting the filaments of said first uncovered portion into a first set of at least two bundles of filaments, collecting the filaments of said second uncovered portion into a second set of at least two bundles of filaments, and braiding the bundles of said first set with the bundles of said second set to form said loop.
  • n is obviously a function of the diameter of the rope and the selection thereof is within the scope of the person skilled in the art.
  • n is generally equal to 3.
  • the expression stripped designates the operation which consists of removing from the rope the envelope surrounding the core formed by the assembly of parallel filaments.
  • FIGURE 1 is a schematic side elevation of a rope having parallel core yarns and a braided covering, illustrating the first stage of forming a loop according to the invention
  • FIGURES 2 and 3 are views similar to FIGURE 1 illustrating the second and third stages
  • FIGURE 4 is a further similar view illustrating the final stages of the formation of the loop.
  • the rope used had as its core 48 X 10,000-denier core elements and 36 30,000-denier core elements each formed from continuous polyhexamethylene adipamide filaments assembled without twist and joined together by a latex.
  • This core was enclosed in a braid produced on a machine having 24 spindles fed with a 10,000-denier rove formed from continuous filaments of polyhexamethylene adipamide.
  • the completed rope weighs approximately 315 grams/ metre and has a diameter of 20.5 mm.
  • the braid 1 forming the envelope was removed, firstly at the free end of the rope over a length of 60 cm. to form the dead strand and secondly over a length 3 of 40 cm., located entirely within the *live" strand of the rope, at a distance from the dead strand 2 which was approximately equal to the developed length of the spliced loop which it was desired to produce i.e., in this case cm.
  • the dead strand 2 was divided into three substantially equal bundles 4 and the live strand 3 into two also substantially equal bundles 5.
  • the three bundles 4 of the dead strand were braided, in a conventional manner, on the two bundles 5 of the live strand (FIGURE 4), the bundles 4 being passed over the bundles 5 ten times.
  • the splice may be surrounded vulcanised rubber strip.
  • FIGURE 4 the braiding of the bundles 4 and 5 and the lacing are shown symbolically and intentionally deformed, so as to facilitate understanding of the invention.
  • this rope retained by the spliced loop, was subjected to a tensile force until rupture occured under a load of 11.5 metric tons.
  • the fracture took place in the heart of the test piece, i.e., in the portion located outside the spliced loop.
  • the spliced loops produced in accordance with the invention are antigiratory by nature; furthermore, the bundles of the live strand remain substantially parallel and the braiding of the bundles of the dead" strand is balanced. Additionally they are flexible and, in use, notably due to the absence of stranding, these spliced loops exhibit hardly any tendency to stretch. Similarly, under the influence of a tensile force, these loops also have the property of being self-locking.
  • a spliced loop in a textile rope comprising in combination:
  • a method of forming a loop in a textile rope comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ropes Or Cables (AREA)

Description

1968 G. MOR IERAS ET 3,411,400
SPLICE]; LOOP AND METHCD CF YOFMAYION '[HFHEOF 2 Sheets-Sheet 1 Filed Sept. 6, 1967 I (III! [III [11'']!!! (I lnpenlors orneys Nov. 19, 1968 G.MORIERAS ET AL 3,411,400
SPLICED LOOP AND METHOD OF FORMATION THEREOF 2 Sheets-Sheet 2:
Filed Sept.
:1 f nveptors A z W A Home y;
United States Patent 3,411,400 SPLICED LOOP AND METHOD OF FORMATION THEREOF Gilbert Morieras and Michel Sere de Lanauze, Lyon, France, assignors to Societe Rhodiaceta Filed Sept. 6, 1967, Ser. No. 665,793 Claims priority, application France, Sept. 20, 1966,
8 Claims. c1. s7-s ABSTRACT OF THE DISCLOSURE The invention describes a spliced loop in a textile rope, and method of making such a loop, in which the rope consists of a plurality of parallel textile core filaments covered by an envelope and comprising a first uncovered portion of said rope from which the envelope has been removed adjacent the free end thereof, a second uncovered portion of said rope, from which the envelope has been removed spaced from said first portion, at least two bundles of filaments in said second uncovered portion, and at least two bundles of filaments in said first uncovered portion, braided with said at least two bundles of said second portion.
The present invention relates to a spliced loop formed at the end of a textile rope, and also to a method for the manufacture thereof.
Recently, a rope has been proposed which consists of an assembly of parallel textile filaments, generally of synthetic origin and constituting a core, covered by an envelope, which is for example braided or extruded around the said core. An example of such a rope is described in French Patent specification No. 1,327,110. As compared with conventional stranded or braided textile ropes these ropes are lighter due essentially to the absence of shortening (stranding) and, consequently, by greater strength for equal diameter or weight. Moreover, when in use they stretch only to a small degree and, relatively to stranded ropes, they exhibit above all permanent antigiratory properties.
Relative to steel cables, apart from the majority of the preceding functional properties, these ropes exhibit a high degree of flexibility and excellent handling qualities.
In a conventional rope or cord, which is stranded or braided in order to produce a terminal splice (also known as a spliced loop), the free end of the rope, the dead strand, is unstranded or unbraided as the case may be, and is interlaced with the live strand at a distance equal to the developed length of the loop which it is desired to form. This interlacing operation, which is a delicate operation and one which requires a considerable amount of time to eilect, is carried out with the aid of a manual apparatus known as a splicerf Due to the interlacing of the filaments of the dead strand with those of the live strand, the cabling and stranding torsions maintain the assembly in equilibruim. The spliced loop formed is then selflocking.
The application of this principle to a rope formed by an assembly of parallel filaments is obviously impossible, due to the absence of elementary strands.
According to one aspect of the present invention there is provided a spliced loop in a textile rope in which the rope consists of a plurality of parallel textile core filaments covered by an envelope and comprising a first uncovered portion of said rope from which the envelope has been removed adjacent the free end thereof, a second uncovered portion of said rope, from which the envelope Patented Nov. 19, 1968 Ice has been removed spaced from said first portion, at least two bundles of filaments in said second uncovered portion, and at least two bundles of filaments in said first uncovered portion, braided with said at least two bundles of said second portion.
The invention also provides a method of forming a spliced loop in a textile rope consisting of a plurality of parallel textile core filaments covered by an envelope, such method comprising stripping the envelope from the core adjacent a free end of the rope to provide a first uncovered portion of said core filaments, stripping the envelope from the core at a position spaced from said first uncovered portion to provide a second uncovered portion of said core filaments, collecting the filaments of said first uncovered portion into a first set of at least two bundles of filaments, collecting the filaments of said second uncovered portion into a second set of at least two bundles of filaments, and braiding the bundles of said first set with the bundles of said second set to form said loop.
In practice 11 dead bundles and n1 live bundles are formed. This number n is obviously a function of the diameter of the rope and the selection thereof is within the scope of the person skilled in the art. For ropes the diameter of which is of the order of one centimeter, n is generally equal to 3.
In the present description, the expression stripped designates the operation which consists of removing from the rope the envelope surrounding the core formed by the assembly of parallel filaments.
In order that the invention may more readily be understood the following description is given, merely by way of example, reference being made to the accompanying drawings, wherein:
FIGURE 1 is a schematic side elevation of a rope having parallel core yarns and a braided covering, illustrating the first stage of forming a loop according to the invention;
FIGURES 2 and 3 are views similar to FIGURE 1 illustrating the second and third stages; and
FIGURE 4 is a further similar view illustrating the final stages of the formation of the loop.
The drawings show substantially the carrying out of the method of the invention. In one particular example, the rope used had as its core 48 X 10,000-denier core elements and 36 30,000-denier core elements each formed from continuous polyhexamethylene adipamide filaments assembled without twist and joined together by a latex. This core was enclosed in a braid produced on a machine having 24 spindles fed with a 10,000-denier rove formed from continuous filaments of polyhexamethylene adipamide. The completed rope weighs approximately 315 grams/ metre and has a diameter of 20.5 mm.
In forming the loop according to the invention as shown in FIGURE 1, the braid 1 forming the envelope was removed, firstly at the free end of the rope over a length of 60 cm. to form the dead strand and secondly over a length 3 of 40 cm., located entirely within the *live" strand of the rope, at a distance from the dead strand 2 which was approximately equal to the developed length of the spliced loop which it was desired to produce i.e., in this case cm.
As shown in FIGURE 2, the dead strand 2 was divided into three substantially equal bundles 4 and the live strand 3 into two also substantially equal bundles 5. After having folded bundles 4 to a position adjacent bundles 5 as shown in FIGURE 3, the three bundles 4 of the dead strand were braided, in a conventional manner, on the two bundles 5 of the live strand (FIGURE 4), the bundles 4 being passed over the bundles 5 ten times.
In order to improve the appearance of the spliced rope,
the splice may be surrounded vulcanised rubber strip.
In FIGURE 4 the braiding of the bundles 4 and 5 and the lacing are shown symbolically and intentionally deformed, so as to facilitate understanding of the invention.
With the aid of a dynamometer, this rope, retained by the spliced loop, was subjected to a tensile force until rupture occured under a load of 11.5 metric tons. The fracture took place in the heart of the test piece, i.e., in the portion located outside the spliced loop.
The spliced loops produced in accordance with the invention are antigiratory by nature; furthermore, the bundles of the live strand remain substantially parallel and the braiding of the bundles of the dead" strand is balanced. Additionally they are flexible and, in use, notably due to the absence of stranding, these spliced loops exhibit hardly any tendency to stretch. Similarly, under the influence of a tensile force, these loops also have the property of being self-locking.
We claim:
1. A spliced loop in a textile rope comprising in combination:
(a) a textile rope including a plurality of parallel textile core filaments and an envelope;
(b) a free end to said textile rope;
(c) a first uncovered portion of said rope having the envelope removed adjacent said free end;
(d) a second uncovered portion of said rope spaced from said first uncovered portion and having the envelope removed therefrom;
(e) at least two bundles of filaments to said second uncovered portion; and
(f) at least two bundles of filaments to said first un covered portion, braided with said at least two bundles of said second portion.
2. The spliced loop defined in claim 1, wherein said first uncovered portion includes three bundles of lilaments, and said second uncovered portion includes two bundles of filaments.
3. The spliced loop defined in claim 1, wherein said braided bundles are covered with a lacing.
4. The spliced loop defined in claim 1, wherein said by a lacing 6 and/or a braided bundles are covered strip,
5. A method of forming a loop in a textile rope, said method comprising the steps of:
(i) providing a textile rope including a plurality of parallel textile core filaments and an envelope and having a free end;
(ii) stripping the envelope from the core filaments adjacent the free end to provide a first uncovered portion of said core filaments;
(iii) stripping the envelope at a location spaced from said first uncovered portion to provide a second uncovered portion of said core filaments;
(iv) collecting the filaments of said first uncovered portion into a first set of at least two bundles of filaments;
(v) collecting the filaments of said second uncovered portion into a second set of at least two bundles of filaments; and
(vi) braiding the bundles of said first set with the bundles of said second set to form said loop.
6. The method defined in claim 5, and including collecting the filaments of said first uncovered portion into three bundles, and collecting the filaments of said second uncovered portion into two bundles.
7. The method defined in claim 5 and including the step of covering the braided bundles with lacing.
8. The method defined in claim 5 and including the step of covering the braided bundles with vulcanised rubwith a vulcanised rubber 30 her strip.
References Cited UNITED STATES PATENTS 1/1960 Australia.
JOHN PETRAKES, Primary Examiner.
US665793A 1966-09-20 1967-09-06 Spliced loop and method of formation thereof Expired - Lifetime US3411400A (en)

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FR77007A FR1500314A (en) 1966-09-20 1966-09-20 Spliced loop and process for making it

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BE (1) BE703997A (en)
CH (1) CH458851A (en)
DE (1) DE1685852A1 (en)
FR (1) FR1500314A (en)
GB (1) GB1162658A (en)
NL (1) NL6712466A (en)
NO (1) NO132696C (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036101A (en) * 1975-12-01 1977-07-19 The Burnett Company, Ltd. Double hollow braided rope assembly and method
US4093292A (en) * 1974-04-01 1978-06-06 Jose Maria Maso Marcet Sling and its method of manufacture
US4414799A (en) * 1982-04-12 1983-11-15 Louis Alexander Rope splicer
US20120297745A1 (en) * 2009-12-10 2012-11-29 Lankhorst Touwfabrieken B.V. Rope having a spliced eye, corresponding method of forming an eye and use of the rope
US8511053B2 (en) 2008-06-04 2013-08-20 Samson Rope Technologies Synthetic rope formed of blend fibers
USD695975S1 (en) * 2011-09-23 2013-12-17 Jennifer Beinke Adjustable collar
USD695970S1 (en) * 2011-09-23 2013-12-17 Jennifer Beinke Leash
US8689534B1 (en) 2013-03-06 2014-04-08 Samson Rope Technologies Segmented synthetic rope structures, systems, and methods
US8707666B2 (en) 2011-03-29 2014-04-29 Samson Rope Technologies Short splice systems and methods for ropes
US8707668B2 (en) 2003-12-16 2014-04-29 Samson Rope Technologies Wrapped yarns for use in ropes having predetermined surface characteristics
US8713905B1 (en) * 2012-11-05 2014-05-06 David John Branscomb Braided eye splice and method
US9003757B2 (en) 2012-09-12 2015-04-14 Samson Rope Technologies Rope systems and methods for use as a round sling
US9074318B2 (en) 2005-09-15 2015-07-07 Samson Rope Technologies Rope structure with improved bending fatigue and abrasion resistance characteristics
US9340925B2 (en) 2013-03-15 2016-05-17 Samson Rope Technologies Splice systems and methods for ropes
US9573661B1 (en) 2015-07-16 2017-02-21 Samson Rope Technologies Systems and methods for controlling recoil of rope under failure conditions
US10377607B2 (en) 2016-04-30 2019-08-13 Samson Rope Technologies Rope systems and methods for use as a round sling
USD916420S1 (en) * 2016-10-28 2021-04-13 Bubba Rope, LLC Winch line eye
US20240183105A1 (en) * 2021-04-20 2024-06-06 Bridon International Limited Synthetic fiber rope

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19539149C1 (en) * 1995-10-20 1997-02-13 Helmut Schellenberg Gmbh Band rope lifting strap

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093292A (en) * 1974-04-01 1978-06-06 Jose Maria Maso Marcet Sling and its method of manufacture
US4036101A (en) * 1975-12-01 1977-07-19 The Burnett Company, Ltd. Double hollow braided rope assembly and method
US4414799A (en) * 1982-04-12 1983-11-15 Louis Alexander Rope splicer
US8707668B2 (en) 2003-12-16 2014-04-29 Samson Rope Technologies Wrapped yarns for use in ropes having predetermined surface characteristics
US9404203B2 (en) 2003-12-16 2016-08-02 Samson Rope Technologies Wrapped yarns for use in ropes having predetermined surface characteristics
US9982386B2 (en) 2005-09-15 2018-05-29 Samson Rope Technologies Rope structure with improved bending fatigue and abrasion resistance characteristics
US9074318B2 (en) 2005-09-15 2015-07-07 Samson Rope Technologies Rope structure with improved bending fatigue and abrasion resistance characteristics
US8511053B2 (en) 2008-06-04 2013-08-20 Samson Rope Technologies Synthetic rope formed of blend fibers
US10669670B2 (en) 2009-12-10 2020-06-02 Lankhorst Touwfabrieken B.V. Rope having a spliced eye, corresponding method of forming an eye and use of the rope
US20120297745A1 (en) * 2009-12-10 2012-11-29 Lankhorst Touwfabrieken B.V. Rope having a spliced eye, corresponding method of forming an eye and use of the rope
US9856600B2 (en) 2009-12-10 2018-01-02 Lankhorst Touwfabrieken B.V. Rope having a spliced eye, corresponding method of forming an eye and use of the rope
US8955299B2 (en) * 2009-12-10 2015-02-17 Lankhorst Touwfabrieken B.V. Rope having a spliced eye, corresponding method of forming an eye and use of the rope
US8707666B2 (en) 2011-03-29 2014-04-29 Samson Rope Technologies Short splice systems and methods for ropes
USD695970S1 (en) * 2011-09-23 2013-12-17 Jennifer Beinke Leash
USD695975S1 (en) * 2011-09-23 2013-12-17 Jennifer Beinke Adjustable collar
US9003757B2 (en) 2012-09-12 2015-04-14 Samson Rope Technologies Rope systems and methods for use as a round sling
US20140123618A1 (en) * 2012-11-05 2014-05-08 David John Branscomb Braided eye splice and method
US8713905B1 (en) * 2012-11-05 2014-05-06 David John Branscomb Braided eye splice and method
US9261167B2 (en) 2013-03-06 2016-02-16 Samson Rope Technologies Segmented synthetic rope structures, systems, and methods
US8689534B1 (en) 2013-03-06 2014-04-08 Samson Rope Technologies Segmented synthetic rope structures, systems, and methods
US9340925B2 (en) 2013-03-15 2016-05-17 Samson Rope Technologies Splice systems and methods for ropes
US9573661B1 (en) 2015-07-16 2017-02-21 Samson Rope Technologies Systems and methods for controlling recoil of rope under failure conditions
US10377607B2 (en) 2016-04-30 2019-08-13 Samson Rope Technologies Rope systems and methods for use as a round sling
USD916420S1 (en) * 2016-10-28 2021-04-13 Bubba Rope, LLC Winch line eye
US20240183105A1 (en) * 2021-04-20 2024-06-06 Bridon International Limited Synthetic fiber rope

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Publication number Publication date
BE703997A (en) 1968-03-18
NO132696C (en) 1975-12-17
NL6712466A (en) 1968-03-21
DE1685852A1 (en) 1971-06-09
GB1162658A (en) 1969-08-27
FR1500314A (en) 1967-11-03
CH458851A (en) 1968-06-30
NO132696B (en) 1975-09-08

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