US3923363A - Hot line connector - Google Patents

Hot line connector Download PDF

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Publication number
US3923363A
US3923363A US497894A US49789474A US3923363A US 3923363 A US3923363 A US 3923363A US 497894 A US497894 A US 497894A US 49789474 A US49789474 A US 49789474A US 3923363 A US3923363 A US 3923363A
Authority
US
United States
Prior art keywords
conductor
tap
high voltage
voltage line
insulation
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
US497894A
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English (en)
Inventor
Russell H Kraft
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.)
Fargo Mfg Co Inc
Original Assignee
Fargo Mfg Co Inc
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 Fargo Mfg Co Inc filed Critical Fargo Mfg Co Inc
Priority to US497894A priority Critical patent/US3923363A/en
Priority to CA224,255A priority patent/CA1017018A/fr
Application granted granted Critical
Publication of US3923363A publication Critical patent/US3923363A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
    • H01R4/2408—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws

Definitions

  • Pat. No. 3,132,914 describes and claims a clamp assembly of the type described and claimed herein.
  • the connector of the present invention embodies improvements to the clamp assembly of that patent including two ring type clamps for firmly securing the tap conductor to the lower jaw, an elastic removable band for detachably holding the spacer bar to the connector assembly, and insulation piercing teeth embedded in the spacer bar adapted to pierce the insulation and mushroom against the metal conductor for a full contact electrical connection.
  • a further object is that of providing an assembly which may readily be manipulated by the linesman and which may be manufactured at nominal cost.
  • a structure is furnished such that the clamp may readily be electrically connected with or disconnected from a transmission line without danger of damage to the latter incident to arcing or similar causes.
  • FIG. 1 is an exploded or separated view of the connector of the present invention showing the various components
  • FIG. 2 is a rear elevation of the connector in applied position
  • FIG. 3 is a top view
  • FIG. 4 is a front view
  • FIG. 5 is a side view
  • FIG. 6 is a front view, partly broken away and in section, showing a modified type of connector with additional insulation piercing teeth;
  • FIG. 7 is a sectional view taken along the line 77 of FIG. 6.
  • the reference numeral 10 indicated a hot or transmission line and 11 one form of the tap-off conductor.
  • the assembly will include a main clamp involving an upper jaw 12 and a lower jaw 13. These jaws are disposed in opposed relationship and are maintained in this position by conveniently providing as part of the lower jaw a rearwardly extending casing portion 14 the interior of which defines in plan a rectangular space. Within that space a block 15 is slidably disposed to be guided by engagement with the adjacent faces of the casing structure 14 and is integral with jaw 12. It is formed with a threaded bore 16 into which the correspondingly threaded shank 16 of an eye-bolt 17 extends. That bolt mounts a collar 18 fixed with respect to its shank and rotatably bearing against the lower face of casing 14.
  • Downwardly extending portions 19 are conveniently included as part of the casing structure 14 and lie one to each side of the bolt shank.
  • the opening in the lower portion of casing 14 and through which the bolt shank extends is unthreaded.
  • Pins 20 may be mounted on each side of the extended portions 19 to underlie the collar 18. It is, of course, apparent that in lieu of an eye-type bolt alternative units may be substituted. However, it is in many respects preferred to utilize a bolt of this type in that it lends itself to the techniques commonly employed by linesmen in connection with the mounting of assemblies by the use of a hot-line stick. It is also preferred as part of the assembly to employ a spacer bar 21 intervening the jaws 12 and 13.
  • These bars being preferably made of pure aluminum, they provide a short, high conductive path between the transmission line and conductor 11 or its equivalent.
  • This bar has rearwardly extending hook-shaped parts 22 on to which may be hooked an elastic band 23 to hold the spacer in position and to allow easy removal.
  • These hook-shaped parts 22 overlap the side edges of flange portions 24 to conveniently hold the bar against unnecessary shifting.
  • the upper jaw 12 be defined by a downwardly and forwardly extending lip 25.
  • the rectangular channel of the casing portion 14 is provided with a slot 14a in which rides a screw member 15a screwed into the block 15. This further serves to align the block with the channel and prevent their separation if the eye-bolt 17 is removed from the block.
  • lower jaw 13 is provided with extensions 26 projecting laterally beyond the plane into which upper jaw 12 extends.
  • This extension provides a lower jaw in the form of a grooved and narrowed portion 27 coextensive with jaw 13 which receives the conductor engaged by that lower jaw.
  • Portions 27 are provided with cross members 28 at the ends of the conductor receiving channel.
  • the narrowed portions 27 of the extensions 26 are sized and adapted to receive tap clamps 29 each of which has a generally key-hole shaped channel 30 running through it.
  • the lower portion of the channel fits the portion 27 of the extension 26 while the upper portion of the channel is shaped to receive conductors of different diameters.
  • the base of the channel 30 has a threaded bore 31 to receive the correspondingly threaded bolt 32 having a head 33.
  • the bolt 32 can be screwed against the bottom of the grooved portion 27 of the extension 26 to clamp the conductor firmly against the top of the channel 30. With the clamps 29 on each side tightened the conductor will be held securely against displacement from the lower jaw 13.
  • the assembly may thereupon be associated with a transmission line 10.
  • a series of insulation piercing teeth 34 are embedded in the upper groove of the spacer bar 21. These teeth pierce the insulation sheath when the connector tightening torque is applied. These teeth are mounted in the spacer bar and are preferably made from a softer material than the pad itself. This softer material allows the teeth to pierce the insulation, contact the metal conductor and then flow along it rather than to penetrate it. This results in a flattened, full contact, adequate electrical connection. In turn the flattened teeth, mushroomed as they are, within the insulation prevent backout of the teeth if the connector is to be removed.
  • the pressure spacer pad because of its removable, flexible rubber band attachment, separates from the connector and stays in location on the run conductor- 10. With the pad so locked, easy re-connection can be made by the connector to the pressure pad without further puncturing of the insulation.
  • the piercing teeth 34 have a geometry to pierce insulation and hardness less than that of the conductor strands causing teeth to fold over strands increasing contact area and locking under uncut insulation. This allows the possibility of transferring relatively high cur rents as teeth can be added for more contact area without damaging run conductor.
  • the connector in such case will in effect be a one-shot device, because with the mushrooming attachment the connector is locked to the conductor and can only be removed by tearing the piercing holes.
  • FIGS. 6 and 7 illustrate another series of teeth 35 in the groove of the upper jaw 12. If necessary or desirable similar teeth could also be added to the lower groove of the spacer 21 or the groove of the lower jaw 13.
  • a connector assembly for attaching a tap-off conductor to an insulation sheathed high voltage line of the type including upper and lower clamping jaws and first attachment means connecting said upper and lower jaws with said upper jaw shiftable toward and away from said lower jaw and first shifting means forming a part of said first attachment means for shifting said upper jaw toward and away from said lower jaw that improvement comprising:
  • conductor spacer bar supported between said jaws and shiftable therebetween which conductor bar is detachably affixed to the assembly and is provided with insulation piercing teeth positioned to pierce the insulation of the high voltage line;
  • said alignment means including a lateral extension on each side of said lower jaw, which lower jaw and said lateral extensions provide an elongated seat for the tap-off conductor extending beneath the conductor bar;
  • tap conductor clamps shaped to receive the said lateral extensions and the tap-off conductor .and having means for fastening said tap-off conductor to said assembly with said tap-off conductor held on each side of said lower jaw and beneath said conductor bar;
  • said assembly can be attached to said high voltage line with said high voltage line between said upper jaw and said conductor bar and said upper and lower jaws can be brought toward each other by said first shifting means with said high voltage line and said tap-off conductor engaging said conductor bar in clamped relation with the teeth of the conductor bar piercing the insulation of the high voltage line and the tap-off conductor engaging said conductor bar in clamped relation to form a full contact electrical connection between the high voltage line and tap-off conductor; and said insulation piercing teeth made of a hardness less than that of the strands of the high voltage line to allow the teeth to pierce the insulation sheath of the high voltage line and mushroom under pressure against the said strands to make a flattened, full contact, adequate electrical connection between the conductor bar and the high voltage line.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
US497894A 1974-08-16 1974-08-16 Hot line connector Expired - Lifetime US3923363A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US497894A US3923363A (en) 1974-08-16 1974-08-16 Hot line connector
CA224,255A CA1017018A (fr) 1974-08-16 1975-04-09 Raccord de transfert sous tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US497894A US3923363A (en) 1974-08-16 1974-08-16 Hot line connector

Publications (1)

Publication Number Publication Date
US3923363A true US3923363A (en) 1975-12-02

Family

ID=23978759

Family Applications (1)

Application Number Title Priority Date Filing Date
US497894A Expired - Lifetime US3923363A (en) 1974-08-16 1974-08-16 Hot line connector

Country Status (2)

Country Link
US (1) US3923363A (fr)
CA (1) CA1017018A (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032212A (en) * 1975-11-28 1977-06-28 Bell Telephone Laboratories, Incorporated Strand adapter for aerial closures and cable terminals
US4120554A (en) * 1977-08-01 1978-10-17 Amp Incorporated Coaxial cable connector
US5367251A (en) * 1993-01-19 1994-11-22 Mctigue James F Tool for grasping and piercing insulated electrical cable for determining whether conductor of cable is energized
US5828017A (en) * 1996-09-16 1998-10-27 Laprairie Electrical Products Electrical switch assembly
US20050170684A1 (en) * 2004-01-29 2005-08-04 Jackson Denton Iii Eye grounding controller
US20060189203A1 (en) * 2004-01-29 2006-08-24 Jackson Denton L Iii Eye grounding controller
US20080182449A1 (en) * 2004-05-07 2008-07-31 Tyco Thermal Controls Llc Adjustable Cable Connector Wire Guide and Connector Assembly Incorporating the Same
US20090160597A1 (en) * 2007-12-21 2009-06-25 Thomas & Betts International, Inc. High Voltage Fuse With Universal Fuse Terminal
USD649519S1 (en) 2010-05-05 2011-11-29 Hubbell Incorporated Insulated plastic cover kit for multi-tap piercing connector
US20120142231A1 (en) * 2010-12-03 2012-06-07 Hubbell Incorporated Spring loaded clamp
US8672716B2 (en) * 2011-02-18 2014-03-18 Hubbell Incorporated Adjustable clamping device
USD709457S1 (en) * 2012-11-15 2014-07-22 Connector Products, Inc. Electrical hotline bail connector
US20170317437A1 (en) * 2016-05-02 2017-11-02 Quanta Associates, L.P. Locking grounding clamp
US10095001B2 (en) 2016-07-29 2018-10-09 Hubbell Incorporated Spring assist cable clamps
US10557568B2 (en) 2017-09-15 2020-02-11 Hubbell Incorporated Multi-sided cable clamps
US10649169B2 (en) 2017-08-16 2020-05-12 Hubbell Incorporated Sliding jaw drop clamp
US10686266B2 (en) * 2016-08-30 2020-06-16 Honeywell International Inc. Cam driven, spring loaded grounding clamp
US10705301B2 (en) 2017-10-22 2020-07-07 Hubbell Incorporated Spring assist cable clamp
US10795108B2 (en) 2016-07-29 2020-10-06 Hubbell Incorporated Spring assist cable clamps
US11404802B2 (en) 2016-05-02 2022-08-02 Quanta Associates, L.P. Locking grounding clamp
US11817665B2 (en) 2021-01-29 2023-11-14 Quanta Associates, L.P. Spring loaded ground clamp
US20250062603A1 (en) * 2021-12-10 2025-02-20 Gripple Limited Overhead line clamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096796A (en) * 1935-08-12 1937-10-26 Kearney James R Corp Grounding set
US3132914A (en) * 1961-08-29 1964-05-12 Fargo Mfg Co Inc Clamp assembly
US3425028A (en) * 1966-06-17 1969-01-28 Burndy Corp Clamp connector
US3426319A (en) * 1967-02-13 1969-02-04 Square D Co Wire connector
US3760341A (en) * 1972-02-22 1973-09-18 Westinghouse Electric Corp Connecting adapter for electric cable and fuse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096796A (en) * 1935-08-12 1937-10-26 Kearney James R Corp Grounding set
US3132914A (en) * 1961-08-29 1964-05-12 Fargo Mfg Co Inc Clamp assembly
US3425028A (en) * 1966-06-17 1969-01-28 Burndy Corp Clamp connector
US3426319A (en) * 1967-02-13 1969-02-04 Square D Co Wire connector
US3760341A (en) * 1972-02-22 1973-09-18 Westinghouse Electric Corp Connecting adapter for electric cable and fuse

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032212A (en) * 1975-11-28 1977-06-28 Bell Telephone Laboratories, Incorporated Strand adapter for aerial closures and cable terminals
US4120554A (en) * 1977-08-01 1978-10-17 Amp Incorporated Coaxial cable connector
US5367251A (en) * 1993-01-19 1994-11-22 Mctigue James F Tool for grasping and piercing insulated electrical cable for determining whether conductor of cable is energized
US5828017A (en) * 1996-09-16 1998-10-27 Laprairie Electrical Products Electrical switch assembly
US20060189203A1 (en) * 2004-01-29 2006-08-24 Jackson Denton L Iii Eye grounding controller
US7029316B2 (en) * 2004-01-29 2006-04-18 Jackson Iii Denton Eye grounding controller
US20050170684A1 (en) * 2004-01-29 2005-08-04 Jackson Denton Iii Eye grounding controller
US7156692B2 (en) * 2004-01-29 2007-01-02 Jackson Iii Denton L Eye grounding controller
US20080182449A1 (en) * 2004-05-07 2008-07-31 Tyco Thermal Controls Llc Adjustable Cable Connector Wire Guide and Connector Assembly Incorporating the Same
US7645173B2 (en) 2004-05-07 2010-01-12 Tyco Thermal Controls Llc Adjustable cable connector wire guide and connector assembly incorporating the same
US20090160597A1 (en) * 2007-12-21 2009-06-25 Thomas & Betts International, Inc. High Voltage Fuse With Universal Fuse Terminal
US8169292B2 (en) * 2007-12-21 2012-05-01 Thomas & Betts International, Inc. High voltage fuse with universal fuse terminal
USD649519S1 (en) 2010-05-05 2011-11-29 Hubbell Incorporated Insulated plastic cover kit for multi-tap piercing connector
US8512070B2 (en) * 2010-12-03 2013-08-20 Hubbell Incorporated Spring loaded clamp
US20120142231A1 (en) * 2010-12-03 2012-06-07 Hubbell Incorporated Spring loaded clamp
US8672716B2 (en) * 2011-02-18 2014-03-18 Hubbell Incorporated Adjustable clamping device
USD709457S1 (en) * 2012-11-15 2014-07-22 Connector Products, Inc. Electrical hotline bail connector
US20170317437A1 (en) * 2016-05-02 2017-11-02 Quanta Associates, L.P. Locking grounding clamp
US10283882B2 (en) * 2016-05-02 2019-05-07 Quanta Associates, L.P. Locking grounding clamp
US11404802B2 (en) 2016-05-02 2022-08-02 Quanta Associates, L.P. Locking grounding clamp
US10795108B2 (en) 2016-07-29 2020-10-06 Hubbell Incorporated Spring assist cable clamps
US10095001B2 (en) 2016-07-29 2018-10-09 Hubbell Incorporated Spring assist cable clamps
US10686266B2 (en) * 2016-08-30 2020-06-16 Honeywell International Inc. Cam driven, spring loaded grounding clamp
US10649169B2 (en) 2017-08-16 2020-05-12 Hubbell Incorporated Sliding jaw drop clamp
US10557568B2 (en) 2017-09-15 2020-02-11 Hubbell Incorporated Multi-sided cable clamps
US10705301B2 (en) 2017-10-22 2020-07-07 Hubbell Incorporated Spring assist cable clamp
US11817665B2 (en) 2021-01-29 2023-11-14 Quanta Associates, L.P. Spring loaded ground clamp
US20250062603A1 (en) * 2021-12-10 2025-02-20 Gripple Limited Overhead line clamp

Also Published As

Publication number Publication date
CA1017018A (fr) 1977-09-06

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