GB2045304A - Free Running Noose - Google Patents

Free Running Noose Download PDF

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Publication number
GB2045304A
GB2045304A GB8000915A GB8000915A GB2045304A GB 2045304 A GB2045304 A GB 2045304A GB 8000915 A GB8000915 A GB 8000915A GB 8000915 A GB8000915 A GB 8000915A GB 2045304 A GB2045304 A GB 2045304A
Authority
GB
United Kingdom
Prior art keywords
cable
gripping member
holes
noose
loop
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.)
Granted
Application number
GB8000915A
Other versions
GB2045304B (en
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB8000915A priority Critical patent/GB2045304B/en
Publication of GB2045304A publication Critical patent/GB2045304A/en
Application granted granted Critical
Publication of GB2045304B publication Critical patent/GB2045304B/en
Expired legal-status Critical Current

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Classifications

    • 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
    • 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

Landscapes

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

Abstract

A device for forming a free running noose in cable 5 comprises a cylinder 1 normally having three holes therein. The cable is threaded through two of the holes 3 and 4 to be gripped therein and is slidable in the third hole 2 to form a free running noose between the third hole 2 and one of the gripping holes 3. The device allows for cable length adjustment and is suitable for use in aircraft as a lanyard for supply dropping. <IMAGE>

Description

SPECIFICATION Improvements in or Relating to Cable Devices The present invention relates to cable loops and in particular relates to a cable loop in the form of a noose.
Hithertofore cable loops were generally formed by folding a cable upon itself within a common sleeve and thereafter crimping the sleeve using a crimping tool. A disadvantage of a cable loop so formed is that it is permanent and therefore does not provide for cable length adjustment. The sleeve cannot ordinarily be removed without damage to the cable and consequently cable length adjustment can only be obtained at the expense of scrapping the existing cable and replacing it with a new cable and sleeve.
The present invention provides a cable loop, in the form of a noose, which can be re-made as required for cable length adjustment and which can be made and re-made without the requirement of auxiliary tooling.
According to the present invention a noose comprises a cable having a slidable portion and a fixable portion, and a cable gripping member having at least two holes therein, and wherein the cable is threaded through the holes such that the slidable portion of the cable is substantially free running through one hole of the gripping member, and the fixable portion is restrained in the remaining hole or holes.
According to a preferred form of the present invention the cable gripping member comprises an elongated prism and the holes extend in parallel along its length.
Preferably the cable gripping member has three holes therein two of which are as close together as practicable. Advantageously the holes are circular in cross-section each having a diameter marginally greater than the cable diameter.
A noose according to the invention will now be described by way of example with reference to the following figures of which: Figure 1 shows a cable gripping member and a lanyard formed of steel cable, and Figures 2a, b and c show the sequence of operations required to form a noose at one end of the lanyard using the gripping member.
Referring to Figure 1, the gripping member 1 is a cylinder with three holes 2, 3 and 4 thereon, each of a diameter which is marginally greater than the diameter of a cable 5 of lanyard 6. The cable 5 has an end portion 7 which is fixable to the gripping member 1.
To form a noose the end portion 7 of the cable 5 is first threaded through the hole 2, as shown in Figure 2a, so that it projects from the gripping member 1 for a length equal to at least six times the length of the gripping member. Secondly, the end portion 7 is folded upon itself and threaded through the hole 3 forming a: loop 8, as shown in Figure 2b. Finally the end portion 7 is again folded upon itself to form a second loop 9 as shown in Figure 2c. In this mode tension is manually applied to the end portion 7 until the cable 5 can no longer be pulled through the hole 4.
The loop 8 formed of the above sequence of operations is a free running noose which can be extended or contracted according to the passage of cable through the hole 2.
When the lanyard 6 is under tension that tension is transmitted through the cable 5 to loop 8. As a result the cable 5 passes back through the hole 3 and the loop 9 contracts. Such contraction causes the loop 9 to act as a ieaf-spring, because the reducing curve of the loop 9 induces tensile and compressive forces within the cable 5. Such forces increase as the loop contracts and lead to increasing friction forces within the hole 3 which react against further passage of the cable 5 therethrough. Hence as tension in the lanyard 6 increases it is matched by increased friction forces in the gripping member, and the cable is retained therein.
Should it be required to adjust the length of the cable 5 to the gripping member 1 this may be achieved by reversing the above sequence of operations and then re-threading the cable to the required length. In a gripping member having only two holes the cable may be singly folded upon itself through a single hole.
The invention is particularly useful where lanyard length is critical. A typical situation arises in aircraft for supply dropping when lanyard length adjustment is required. The invention also has application in respect of accelerator, choke and brake cables. In an alternative form the cable gripping member may embody two holes, one of which is in the form of a slot and hence capable of accepting the cable when doubled back upon itself.
Claims
1. A noose comprising a cable having a slidable portion and a fixable portion, and a cable gripping member having at least two holes therein, and wherein the cable is threaded through the holes such that the slidable portion of the cable is substantially free running through one hole of the gripping member, and the fixable portion is restrained in the remaining hole or holes.
2. A noose as claimed in claim 1 wherein the gripping member is an elongated prism and the holes extend in parallel along its length.
3. A noose as claimed in claim 1 or claim 2 and wherein the gripping member has three holes therein two of which are as close together as practicable.
4. A noose as claimed in any one of the preceding claims having more than two holes which are circular in cross-section each having a diameter marginally greater than the cable diameter.
5. A cable gripping member comprising an elongated prism having at least two holes therein which extend in parallel along the prism length.
6. A cable gripping member as claimed in claim 5 having three holes therein two of which are as close together as practicable.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or Relating to Cable Devices The present invention relates to cable loops and in particular relates to a cable loop in the form of a noose. Hithertofore cable loops were generally formed by folding a cable upon itself within a common sleeve and thereafter crimping the sleeve using a crimping tool. A disadvantage of a cable loop so formed is that it is permanent and therefore does not provide for cable length adjustment. The sleeve cannot ordinarily be removed without damage to the cable and consequently cable length adjustment can only be obtained at the expense of scrapping the existing cable and replacing it with a new cable and sleeve. The present invention provides a cable loop, in the form of a noose, which can be re-made as required for cable length adjustment and which can be made and re-made without the requirement of auxiliary tooling. According to the present invention a noose comprises a cable having a slidable portion and a fixable portion, and a cable gripping member having at least two holes therein, and wherein the cable is threaded through the holes such that the slidable portion of the cable is substantially free running through one hole of the gripping member, and the fixable portion is restrained in the remaining hole or holes. According to a preferred form of the present invention the cable gripping member comprises an elongated prism and the holes extend in parallel along its length. Preferably the cable gripping member has three holes therein two of which are as close together as practicable. Advantageously the holes are circular in cross-section each having a diameter marginally greater than the cable diameter. A noose according to the invention will now be described by way of example with reference to the following figures of which: Figure 1 shows a cable gripping member and a lanyard formed of steel cable, and Figures 2a, b and c show the sequence of operations required to form a noose at one end of the lanyard using the gripping member. Referring to Figure 1, the gripping member 1 is a cylinder with three holes 2, 3 and 4 thereon, each of a diameter which is marginally greater than the diameter of a cable 5 of lanyard 6. The cable 5 has an end portion 7 which is fixable to the gripping member 1. To form a noose the end portion 7 of the cable 5 is first threaded through the hole 2, as shown in Figure 2a, so that it projects from the gripping member 1 for a length equal to at least six times the length of the gripping member. Secondly, the end portion 7 is folded upon itself and threaded through the hole 3 forming a: loop 8, as shown in Figure 2b. Finally the end portion 7 is again folded upon itself to form a second loop 9 as shown in Figure 2c. In this mode tension is manually applied to the end portion 7 until the cable 5 can no longer be pulled through the hole 4. The loop 8 formed of the above sequence of operations is a free running noose which can be extended or contracted according to the passage of cable through the hole 2. When the lanyard 6 is under tension that tension is transmitted through the cable 5 to loop 8. As a result the cable 5 passes back through the hole 3 and the loop 9 contracts. Such contraction causes the loop 9 to act as a ieaf-spring, because the reducing curve of the loop 9 induces tensile and compressive forces within the cable 5. Such forces increase as the loop contracts and lead to increasing friction forces within the hole 3 which react against further passage of the cable 5 therethrough. Hence as tension in the lanyard 6 increases it is matched by increased friction forces in the gripping member, and the cable is retained therein. Should it be required to adjust the length of the cable 5 to the gripping member 1 this may be achieved by reversing the above sequence of operations and then re-threading the cable to the required length. In a gripping member having only two holes the cable may be singly folded upon itself through a single hole. The invention is particularly useful where lanyard length is critical. A typical situation arises in aircraft for supply dropping when lanyard length adjustment is required. The invention also has application in respect of accelerator, choke and brake cables. In an alternative form the cable gripping member may embody two holes, one of which is in the form of a slot and hence capable of accepting the cable when doubled back upon itself. Claims
1. A noose comprising a cable having a slidable portion and a fixable portion, and a cable gripping member having at least two holes therein, and wherein the cable is threaded through the holes such that the slidable portion of the cable is substantially free running through one hole of the gripping member, and the fixable portion is restrained in the remaining hole or holes.
2. A noose as claimed in claim 1 wherein the gripping member is an elongated prism and the holes extend in parallel along its length.
3. A noose as claimed in claim 1 or claim 2 and wherein the gripping member has three holes therein two of which are as close together as practicable.
4. A noose as claimed in any one of the preceding claims having more than two holes which are circular in cross-section each having a diameter marginally greater than the cable diameter.
5. A cable gripping member comprising an elongated prism having at least two holes therein which extend in parallel along the prism length.
6. A cable gripping member as claimed in claim
5 having three holes therein two of which are as close together as practicable.
7. A cable gripping member substantially as hereinbefore described with reference to Figure 1.
8. A noose substantially as hereinbefore described with reference to Figure 2.
GB8000915A 1979-01-11 1980-01-10 Free running noose Expired GB2045304B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8000915A GB2045304B (en) 1979-01-11 1980-01-10 Free running noose

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7901157 1979-01-11
GB8000915A GB2045304B (en) 1979-01-11 1980-01-10 Free running noose

Publications (2)

Publication Number Publication Date
GB2045304A true GB2045304A (en) 1980-10-29
GB2045304B GB2045304B (en) 1983-07-20

Family

ID=26270208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8000915A Expired GB2045304B (en) 1979-01-11 1980-01-10 Free running noose

Country Status (1)

Country Link
GB (1) GB2045304B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4875653A (en) * 1988-10-19 1989-10-24 Connolly Donald P Support systems and apparatus for suspending and resuspending articles at selected height positions
US5351367A (en) * 1993-03-04 1994-10-04 Arcadia Management Co., Inc. Line tensioner
GB2455082A (en) * 2007-11-27 2009-06-03 Workshop For Housing Ltd A lanyard for tethering the halyard of a yacht

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4875653A (en) * 1988-10-19 1989-10-24 Connolly Donald P Support systems and apparatus for suspending and resuspending articles at selected height positions
US5351367A (en) * 1993-03-04 1994-10-04 Arcadia Management Co., Inc. Line tensioner
GB2455082A (en) * 2007-11-27 2009-06-03 Workshop For Housing Ltd A lanyard for tethering the halyard of a yacht

Also Published As

Publication number Publication date
GB2045304B (en) 1983-07-20

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PCNP Patent ceased through non-payment of renewal fee