CA1240749A - Automatic connector for cable - Google Patents
Automatic connector for cableInfo
- Publication number
- CA1240749A CA1240749A CA000477018A CA477018A CA1240749A CA 1240749 A CA1240749 A CA 1240749A CA 000477018 A CA000477018 A CA 000477018A CA 477018 A CA477018 A CA 477018A CA 1240749 A CA1240749 A CA 1240749A
- Authority
- CA
- Canada
- Prior art keywords
- opening
- cable
- jaw
- bore
- jaw sections
- 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
Links
Landscapes
- Clamps And Clips (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A cable gripping unit for forming a dead end connector and the like for cable which includes a body having a tapered bore terminating in cable accommodating openings with a gripping member within the bore. The outer surface of the gripping member is tapered and circular in cross section to conform to the taper of the bore and includes a plurality of jaw sections for gripping the cable maintained by a spring biased retainer. The body includes flanges with openings so configured to accommodate a swing away U-shaped bail.
A cable gripping unit for forming a dead end connector and the like for cable which includes a body having a tapered bore terminating in cable accommodating openings with a gripping member within the bore. The outer surface of the gripping member is tapered and circular in cross section to conform to the taper of the bore and includes a plurality of jaw sections for gripping the cable maintained by a spring biased retainer. The body includes flanges with openings so configured to accommodate a swing away U-shaped bail.
Description
The present invention is directed towards a cable gripping unit for use in gripping or dead ending cables.
Dead end devices and connectors are well known in the cable field. Examples of such devices are illustrated in U.S. Patent NoS. 3,253,308 and 3,852,850. A typical dead end device is used to grip one end of a wire in order to anchor it to a s-tationary object.
There have been a variety of different units developed over the past years. Cost, convenience and efficiency are impor-tant criteria. The device must effectively grip the cable in a positive manner and over long periods of time.
A type of cable in common use today is stranded cable in which the strands are -twisted so that each of the strands is in the form of a helix. Helically wound stranded cable of this type can be difficult to hold firmly in a gripping ~rS
unit. Also, the cable material varies and may be made of galvanized steel, aluminum coated steel (AW), copper coated ; steel OW or stainless steel for example. Accordingly, the unit should be useful with different types of materials and sizes. While the devices illustrated in the aforenoted patents have proven eminently satisfactory in certain applications, naturally further improvements in this type of device would be advantageous and desirable.
SUMMARY OF THE INVENTION
It is a principal object of the present invention to provide for a cable gripping unit for forming a dead end connector which is relatively inexpensive, yet effective and easily utilized.
It is another object to provide for a dead end connector which has an improved gripping member and an improved swing away bail adding to the convenient use of the device.
In this regard, the present invention provides for a gripping unit or dead end connector comprising a body, a jaw assembly and bail. A gripping member is mounted in a tapered bore of the body-and includes a plurality of jaw hooks or sections so positioned so as to have a jaw bore formed therebetween into which a cable can be inserted.
More particularly, these jaw sections are positioned relative to one another by way of a retainer and form a ~2~ 9 frustoconical member with a central toothed jaw bore. A
longitudinal groove is provided separating the toothed section into two areas on each jaw section which provides for improved gripping. The jaw sections are allowed to ve out to separately allow the guy wire, cable, or conductor etc., to be inserted in one direction and to grasp the cable when it is pulled in the opposite direction. A tapering bore in the body is provided to contain the gripper member.
The body also includes flanges having oppenings to receive the legs of a bail, and arranged so as to allow ease of assembly and coupling of the cable and the dead end to a support.
BRIEF DESCRIPTION OF THE DRAWINGS
-Thus, the aforenoted objects, advantages and others will be realized by the present invention, the description of which should be taken in conjunction with the drawings, wherein:
Figure 1 is a perspective view of the gripping device, incorporating the teachings of the present invention;
Figure 2 is an exploded view of the gripping device, incorporating the teachings of the present invention;
Figures 3A-3C are partially sectional views of the body of the gripping device during various stages of insertion of the cable therein, incorporating the teachings of the present invention; and ~L~40~
Figure 4 is a perspective view of another embodiment of the jaw section.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference now more particularly to the drawings, there is shown a cable gripping unit or dead end 10. The unit 10 preferably comprises a body 12 which includes a cylindrical portion 14 and an enlarged flanged rearward portion 16 having an oval shaped opening 18 and circular opening 20 on opposite flanges thereon. Opening 20 includes a slot 22 along its length for purposes that will be apparent.
A frustoconical bore 24 is provided and centralized with respect to the cylindrical portion 16 and extends from the front face 23 to the back face 25 of the body. A
somewhat beveled opening 28 is provided on the front face 23 with an enlarged opening 30 on the back face 25.
The bore 24 serves as a receptacle for the gripping member 32, as shown in Figures 3A-3C. In this regard, the gripping member 32 includes three jaw hooks or sections 34 which are arched and somewhat triangular in shape tapering from back 36 to front 38 in width and also thickness.
Gripping ribs 39 are positioned throughout the inner surface of the sections 34. The outer surface 40 is smooth and curved as shown and along each side of the jaw sections 34 is a flay portion 42 which allows the jaw sections 34 to -rest against each other as shown in Figure 3a while forming a circular jaw gripping passageway or bore therethrough.
A hollow retainer 44 is provided and includes a back cylinder portion 46 and a circular wall 48 on which is located T-shaped members 50, with adjacent ones forming slots for the respective jaw sections 34. In this regard, the width of the back 36 of the jaw sections 34 between surfaces 42 is approximately equal to the distance between the adjacent upright portions 52 of the T-shaped members.
The arched extensions 54 thereof are extended outward v and are positioned in respective notches 41 in the jaw sec-tions 34. The dimensions of the extensions 54 and notches 41 are as such that the jaw sections 34 are allowed to move in and out to a certain degree. Such outward movement will however be restricted by the surface of bore 23 when the gripping member is inserted therein, as will be apparent.
With regard to Figure 4, for increased gripping, jaw section 34' is shown which is the same as section 34 in all respects except that it includes a longitudinal groove 41 running along the entire length of the section. While this reduces slightly the area of ribs 39', it has been found that improved gripping results due to improved encirclement of the strand. A gripping member including three of these jaw sections 34' would have the equivalent of six jaw gripping surfaces each creating a more concentrated bite This jaw section 34' is in all other respects the same as jaw section 34 and may ye readily substituted therefor so that the des-cription herein which refers to the incorporation of jaw section 34, eaually applies to section 34'.
`
~2~Q~9 A spring 54 is provided with a portion o the spring being free fitted about the cylindrical portion 46 as shown in Figure 3a. The spring 54 is intended to bias thP gripper member 32 forward in bore 24 when inserted therein with washer or retainer 55 being affixed at the back face 25 over opening 30 by perhaps crimping or any other means suitable for purpose.
As shown in Figures 3a-3c, the spring 54' pushes the gripping member 32 forward in the bore 24 into a rest position with the outer surfaces of the jaw sections 34 coupled with retainer 44 engaging the inner surface of the bore 24.
Prior to inserting the cable or guy wire 56 into the body 12, a pilot cup 58 is placed thereon. Upon insertion through opening 28, the pilot cup 58 engages ye front end 38 of the jaw sections 34 and pushes the gripper member 32 back into the bore 24 by depressing the spring 54. As the member 32 moves back, the jaw sections 34 are allowed to separate and move outward due to the increasing bore size, which in turn allows the pilot cup 58 and cable 56 to enter and pass through the center of the jaw sections 34, the retainer 44, spring 54 and out the opening in the washer 55 (see Figures 3b and c).
When the conductor 56 is pulled in the opposite direction, the ribs 39 clamp down upon the cable due to slight rearward movement of the gripping member 32 caused by the spring 54 and more importantly, by the engagQment of the outer surface 40 of the jaw sections 34 and bore 24 causing the ribs 39 to increase their grip on the cable. Movement ,~,.~, in the opposite direction will still however be permitted.
Thus the gripping unit 12 allows for easy attachment ; and detachment of a cable. In turn, unit 12 is readily l attached to an anchor which is fastened to the ground for example, in the case of dead ends, by way of a bail 60.
; The U-shaped bail 60 includes a closed end 62 and a pair of substantially parallel opposite legs 64 and 66. The free end of each leg includes an enlarged knob or head.
Thus, leg 64 terminates in head 68 and leg 66 in head 70.
The under surfaces 72 and 74 of the heads 68 and 70 respectively form restricting and engaging surfaces for the bail 60 as shown in Figure 1.
As previously discussed, the outer surface of the cylindrical portion 14 of body 12 includes a pair of diametrically opposing flanges which include openings 18 and 20. Opening 20 with its slot 22 allows for leg 64 to be directed vertically therein or out whereas the opening 18 being enclosed requires passing of head 68 therethrough as will be discussed.
In this regard, opening 28 has substantially a con-stant diameter throughout its length which is slightly larger than the dimensions of head 68 to allow it to be inserted therethrough in the direction shown by the arrown During insertion of leg 64, the bail 60 must be rotated approximately 90 to allow an elongated flattened portion 76 to pass through opening 18. Flattened portion 76 has 7a~3 dimensions slightly smaller than that of opening 18 to allow for this. The bail 60 is then threaded all the way through until the round head 70 is positioned adjacent the front face 24. Note that the dimensions of head 70 are such that 1 its diameter is larger than the width of oval opening 18 so ! to allow surface 74 to engage a portion of face 23, for anchoring purposes. When the gripping unit is used as a dead end for example, the bail 60 at this point via leg 64, I would be slipped through the eye of an anchor and then swing over so that the flat portion 76 enters opening 20 via slot 22. The body 12 is then pulled forward locking the bail in position as shown in Figure 1. Note that the head 68 is sized so as to be larger than the diameter of opening 20 so as to allow surface 72 to engage a portion of face 23 for anchoring. The conductor 56 can at this point, or even prior to coupling the bail 69, be inserted into the body 12 and when coupled to the anchor, pulled therethrough until the desired tensioning of the conductor is realized.
Thus, by the present invention, its objects, advantages and others are realized and although preferred embodiments have been disclosed and described in detail herein, its scope should not be limited thereby rather its scope should be determined by that of the appended claimsO
Dead end devices and connectors are well known in the cable field. Examples of such devices are illustrated in U.S. Patent NoS. 3,253,308 and 3,852,850. A typical dead end device is used to grip one end of a wire in order to anchor it to a s-tationary object.
There have been a variety of different units developed over the past years. Cost, convenience and efficiency are impor-tant criteria. The device must effectively grip the cable in a positive manner and over long periods of time.
A type of cable in common use today is stranded cable in which the strands are -twisted so that each of the strands is in the form of a helix. Helically wound stranded cable of this type can be difficult to hold firmly in a gripping ~rS
unit. Also, the cable material varies and may be made of galvanized steel, aluminum coated steel (AW), copper coated ; steel OW or stainless steel for example. Accordingly, the unit should be useful with different types of materials and sizes. While the devices illustrated in the aforenoted patents have proven eminently satisfactory in certain applications, naturally further improvements in this type of device would be advantageous and desirable.
SUMMARY OF THE INVENTION
It is a principal object of the present invention to provide for a cable gripping unit for forming a dead end connector which is relatively inexpensive, yet effective and easily utilized.
It is another object to provide for a dead end connector which has an improved gripping member and an improved swing away bail adding to the convenient use of the device.
In this regard, the present invention provides for a gripping unit or dead end connector comprising a body, a jaw assembly and bail. A gripping member is mounted in a tapered bore of the body-and includes a plurality of jaw hooks or sections so positioned so as to have a jaw bore formed therebetween into which a cable can be inserted.
More particularly, these jaw sections are positioned relative to one another by way of a retainer and form a ~2~ 9 frustoconical member with a central toothed jaw bore. A
longitudinal groove is provided separating the toothed section into two areas on each jaw section which provides for improved gripping. The jaw sections are allowed to ve out to separately allow the guy wire, cable, or conductor etc., to be inserted in one direction and to grasp the cable when it is pulled in the opposite direction. A tapering bore in the body is provided to contain the gripper member.
The body also includes flanges having oppenings to receive the legs of a bail, and arranged so as to allow ease of assembly and coupling of the cable and the dead end to a support.
BRIEF DESCRIPTION OF THE DRAWINGS
-Thus, the aforenoted objects, advantages and others will be realized by the present invention, the description of which should be taken in conjunction with the drawings, wherein:
Figure 1 is a perspective view of the gripping device, incorporating the teachings of the present invention;
Figure 2 is an exploded view of the gripping device, incorporating the teachings of the present invention;
Figures 3A-3C are partially sectional views of the body of the gripping device during various stages of insertion of the cable therein, incorporating the teachings of the present invention; and ~L~40~
Figure 4 is a perspective view of another embodiment of the jaw section.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference now more particularly to the drawings, there is shown a cable gripping unit or dead end 10. The unit 10 preferably comprises a body 12 which includes a cylindrical portion 14 and an enlarged flanged rearward portion 16 having an oval shaped opening 18 and circular opening 20 on opposite flanges thereon. Opening 20 includes a slot 22 along its length for purposes that will be apparent.
A frustoconical bore 24 is provided and centralized with respect to the cylindrical portion 16 and extends from the front face 23 to the back face 25 of the body. A
somewhat beveled opening 28 is provided on the front face 23 with an enlarged opening 30 on the back face 25.
The bore 24 serves as a receptacle for the gripping member 32, as shown in Figures 3A-3C. In this regard, the gripping member 32 includes three jaw hooks or sections 34 which are arched and somewhat triangular in shape tapering from back 36 to front 38 in width and also thickness.
Gripping ribs 39 are positioned throughout the inner surface of the sections 34. The outer surface 40 is smooth and curved as shown and along each side of the jaw sections 34 is a flay portion 42 which allows the jaw sections 34 to -rest against each other as shown in Figure 3a while forming a circular jaw gripping passageway or bore therethrough.
A hollow retainer 44 is provided and includes a back cylinder portion 46 and a circular wall 48 on which is located T-shaped members 50, with adjacent ones forming slots for the respective jaw sections 34. In this regard, the width of the back 36 of the jaw sections 34 between surfaces 42 is approximately equal to the distance between the adjacent upright portions 52 of the T-shaped members.
The arched extensions 54 thereof are extended outward v and are positioned in respective notches 41 in the jaw sec-tions 34. The dimensions of the extensions 54 and notches 41 are as such that the jaw sections 34 are allowed to move in and out to a certain degree. Such outward movement will however be restricted by the surface of bore 23 when the gripping member is inserted therein, as will be apparent.
With regard to Figure 4, for increased gripping, jaw section 34' is shown which is the same as section 34 in all respects except that it includes a longitudinal groove 41 running along the entire length of the section. While this reduces slightly the area of ribs 39', it has been found that improved gripping results due to improved encirclement of the strand. A gripping member including three of these jaw sections 34' would have the equivalent of six jaw gripping surfaces each creating a more concentrated bite This jaw section 34' is in all other respects the same as jaw section 34 and may ye readily substituted therefor so that the des-cription herein which refers to the incorporation of jaw section 34, eaually applies to section 34'.
`
~2~Q~9 A spring 54 is provided with a portion o the spring being free fitted about the cylindrical portion 46 as shown in Figure 3a. The spring 54 is intended to bias thP gripper member 32 forward in bore 24 when inserted therein with washer or retainer 55 being affixed at the back face 25 over opening 30 by perhaps crimping or any other means suitable for purpose.
As shown in Figures 3a-3c, the spring 54' pushes the gripping member 32 forward in the bore 24 into a rest position with the outer surfaces of the jaw sections 34 coupled with retainer 44 engaging the inner surface of the bore 24.
Prior to inserting the cable or guy wire 56 into the body 12, a pilot cup 58 is placed thereon. Upon insertion through opening 28, the pilot cup 58 engages ye front end 38 of the jaw sections 34 and pushes the gripper member 32 back into the bore 24 by depressing the spring 54. As the member 32 moves back, the jaw sections 34 are allowed to separate and move outward due to the increasing bore size, which in turn allows the pilot cup 58 and cable 56 to enter and pass through the center of the jaw sections 34, the retainer 44, spring 54 and out the opening in the washer 55 (see Figures 3b and c).
When the conductor 56 is pulled in the opposite direction, the ribs 39 clamp down upon the cable due to slight rearward movement of the gripping member 32 caused by the spring 54 and more importantly, by the engagQment of the outer surface 40 of the jaw sections 34 and bore 24 causing the ribs 39 to increase their grip on the cable. Movement ,~,.~, in the opposite direction will still however be permitted.
Thus the gripping unit 12 allows for easy attachment ; and detachment of a cable. In turn, unit 12 is readily l attached to an anchor which is fastened to the ground for example, in the case of dead ends, by way of a bail 60.
; The U-shaped bail 60 includes a closed end 62 and a pair of substantially parallel opposite legs 64 and 66. The free end of each leg includes an enlarged knob or head.
Thus, leg 64 terminates in head 68 and leg 66 in head 70.
The under surfaces 72 and 74 of the heads 68 and 70 respectively form restricting and engaging surfaces for the bail 60 as shown in Figure 1.
As previously discussed, the outer surface of the cylindrical portion 14 of body 12 includes a pair of diametrically opposing flanges which include openings 18 and 20. Opening 20 with its slot 22 allows for leg 64 to be directed vertically therein or out whereas the opening 18 being enclosed requires passing of head 68 therethrough as will be discussed.
In this regard, opening 28 has substantially a con-stant diameter throughout its length which is slightly larger than the dimensions of head 68 to allow it to be inserted therethrough in the direction shown by the arrown During insertion of leg 64, the bail 60 must be rotated approximately 90 to allow an elongated flattened portion 76 to pass through opening 18. Flattened portion 76 has 7a~3 dimensions slightly smaller than that of opening 18 to allow for this. The bail 60 is then threaded all the way through until the round head 70 is positioned adjacent the front face 24. Note that the dimensions of head 70 are such that 1 its diameter is larger than the width of oval opening 18 so ! to allow surface 74 to engage a portion of face 23, for anchoring purposes. When the gripping unit is used as a dead end for example, the bail 60 at this point via leg 64, I would be slipped through the eye of an anchor and then swing over so that the flat portion 76 enters opening 20 via slot 22. The body 12 is then pulled forward locking the bail in position as shown in Figure 1. Note that the head 68 is sized so as to be larger than the diameter of opening 20 so as to allow surface 72 to engage a portion of face 23 for anchoring. The conductor 56 can at this point, or even prior to coupling the bail 69, be inserted into the body 12 and when coupled to the anchor, pulled therethrough until the desired tensioning of the conductor is realized.
Thus, by the present invention, its objects, advantages and others are realized and although preferred embodiments have been disclosed and described in detail herein, its scope should not be limited thereby rather its scope should be determined by that of the appended claimsO
Claims (11)
- Claim 1. A cable gripping unit for forming a dead end connector and the like for cable, comprising:
a body having a tapered bore terminating in a first and second cable accommodating openings axially aligned at opposite ends of the body;
a gripping member within said bore and longitudinally movable therein, said gripping member including a plurality of jaw sections;
at least two cable gripping portions of said jaw sections formed from transverse serrations on the surface of the jaw sections with said portions separated by a longitudinal groove;
a cylindrical jaw bore defined by said jaw sections;
the outer surface of said gripping member being tapered and circular in cross section to conform with the taper of the bore;
a retainer means engaging said jaw sections and tending to maintain said jaw sections in a position capable of gripping a cable;
spring means biasing said gripping member toward the first opening of the bore; and said gripping member being displaceable by the insertion of a cable in the bore in a first direction through said first opening allowing said jaw sections to be displaced permitting the cable to pass through the jaw bore but prevents movement of the cable in a second direction opposite that of the first direction. - Claim 2. The invention in accordance with claim 1 which includes at least three jaw sections, the jaw sections having an inner end and an outer end with the cable being introduced into the jaw bore through the outer end of the jaw sections, said retaining means includes a plurality of slots, one slot for each jaw section positioned adjacent the inner end of the jaw sections, said slots of such a dimension so as to allow the inward and outward movement of the outer end while retaining the inner end within the slot.
- Claim 3. The invention in accordance with claim 2 wherein said retaining means is circular having a central opening therethrough, said slots are formed by a plurality of T-shaped members positioned in a circular manner about the retaining means; said jaw sections including oppositely disposed notches at the respective inner ends with the T-shape members having a portion disposed in notches.
- Claim 4. The invention in accordance with claim 1 wherein said spring means is a helical coil axially positioned with respect to said central opening in the retaining means so as to allow a cable upon insertion through the first opening and jaw bore to pass through the central opening and spring means and out the second opening.
- Claim 5. The invention in accordance with claim 1 wherein said second opening is defined by an opening in a washer affixed to the body.
- Claim 6. The invention in accordance with claim 1 wherein each of the jaw sections has an arcuate outer configuration extending for less than a semi-circle, and the jaw sections are substantially the same size and configuration.
- Claim 7. The invention in accordance with claim 1 wherein said gripping member is engageable with the bore when force is applied to said cable in the second direction.
- Claim 8. The invention in accordance with claim 1 wherein said jaw sections are sized to provide a circumferential grip around a predetermined cable diameter to thereby provide a desired gripping force thereon.
- Claim 9. The invention in accordance with claim 1 which includes a U-shaped bail having a first leg terminating in a first head and a second leg terminating in a second head, said body includes a pair of spaced flanges extending outwardly therefrom having respective first and second flange openings for receiving respective legs of the U-shaped bail, said first head being capable of passing through said first flange opening but incapable of passing through said second flange opening when said unit is fully assembled, said second head incapable of passing through either flange opening when the unit is fully assembled.
- Claim 10. The invention in accordance with claim 9 wherein said first leg includes a flat portion; said second flange opening includes a slot throughout its length having opposite walls spaced at a distance which is smaller than the diameter of the second opening, whereupon insertion of said first leg through the first opening and passing the bail therethrough to a point on the second leg oppositely disposed to said flat portion allows the first leg to swing into the second opening by way of said slot while the second leg rotates in said first opening.
- Claim 11. The invention in accordance with claim 10 wherein said first leg includes a portion thereof positioned between said flat portion and said first head which has a diameter thereof greater than the slot but less than the second opening so that once the flat portion enters the second opening the bail can be moved axially with respect to the flange openings to a point where the first leg is captured by the second opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69326585A | 1985-01-22 | 1985-01-22 | |
| US693,265 | 1985-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1240749A true CA1240749A (en) | 1988-08-16 |
Family
ID=24783988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000477018A Expired CA1240749A (en) | 1985-01-22 | 1985-03-20 | Automatic connector for cable |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1240749A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579946A (en) * | 2020-05-26 | 2020-08-25 | 海南驿电通科技有限公司 | Cable oscillatory wave partial discharge testing device |
-
1985
- 1985-03-20 CA CA000477018A patent/CA1240749A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579946A (en) * | 2020-05-26 | 2020-08-25 | 海南驿电通科技有限公司 | Cable oscillatory wave partial discharge testing device |
| CN111579946B (en) * | 2020-05-26 | 2022-07-19 | 创新电力技术(海南)有限公司 | Testing arrangement is put in cable oscillatory wave office |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |