EP0854538A2 - Broche filetée pour la borne d'un câble électrique adapté pour créer un contact électrique à percement d'isolation - Google Patents

Broche filetée pour la borne d'un câble électrique adapté pour créer un contact électrique à percement d'isolation Download PDF

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Publication number
EP0854538A2
EP0854538A2 EP98100455A EP98100455A EP0854538A2 EP 0854538 A2 EP0854538 A2 EP 0854538A2 EP 98100455 A EP98100455 A EP 98100455A EP 98100455 A EP98100455 A EP 98100455A EP 0854538 A2 EP0854538 A2 EP 0854538A2
Authority
EP
European Patent Office
Prior art keywords
grub screw
diametrical
pierce
connecting terminal
cable
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.)
Withdrawn
Application number
EP98100455A
Other languages
German (de)
English (en)
Other versions
EP0854538A3 (fr
Inventor
Matteo Giancontieri
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.)
Fornitalia Srl
Original Assignee
Fornitalia Srl
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
Priority claimed from IT97GE000004 external-priority patent/IT1293186B1/it
Priority claimed from IT97GE000035 external-priority patent/IT1293204B1/it
Application filed by Fornitalia Srl filed Critical Fornitalia Srl
Publication of EP0854538A2 publication Critical patent/EP0854538A2/fr
Publication of EP0854538A3 publication Critical patent/EP0854538A3/fr
Withdrawn legal-status Critical Current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
    • H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
    • H01R4/2483—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts penetrating the area under the screw tip

Definitions

  • the present invention relates to a grub screw for the connecting terminal of an electric cable, having a front end shaped as a milling cutter adapted to pierce through the insulating sheath to establish the desired electrical contact.
  • a grub screw for the connecting terminal of an electrical cable comprising a front end portion shaped as a milling cutter, i.e. provided with one or more diametrical notches of frusto-conical cross section and of suitable depth so as to form cutting edges which in the schrewing-down step for being locked on the electrical cable can appropriately pierce through the insulating sheath of said electrical cable.
  • the basic embodiment of the grub screw proposed by the invention comprises a cylindrical body 1, threaded as usual, with a rear end having a diametral slot 2 for engaging a screw-driver or other tool therein, and with a front end shaped as a milling cutter, i.e. planar and formed with a diametrical frusto-conical notch 3 having two cutting edges and a small space designed to collect the material removed from the sheath of the cable during the tightening step of the screw, when said screw is advanced and rotated to pierce through the sheath and reach the core of the cable so as to establish the desired electrical contact and, obviously, fasten the cable to the connecting terminal.
  • a milling cutter i.e. planar and formed with a diametrical frusto-conical notch 3 having two cutting edges and a small space designed to collect the material removed from the sheath of the cable during the tightening step of the screw, when said screw is advanced and rotated to pierce through the shea
  • the grub screw may be made of any suitable material and may be provided, at the end designed to be engaged by a screw driver, with a normal enlarged head.
  • the system according to the invention besides eliminating the usual conventional stripping off the cable ends, permits to reduce considerably, during the electrical connection step, the handling of said cables so that, even under the standpoint of security, the article according to the invention is greatly efficient and complying with the safety standards required by the law regulations in force.
  • the invention provides, as shown in the further Figures, a number of modifications, some of which are described below, always with reference to said front end of the grub screw.
  • the modified embodiment of Figs. 3 and 4 provides a convex front end with a diametrical frusto-conical notch 4 of greater depth.
  • This embodiment may have some advantages, depending on the section of the cable, still within the same operational principle, and this is true also in the other modifications to be mentioned below.
  • Figs. 5 and 6 provides a planar front end having two frusto-conical notches 5 and 6 crossed to each other, again for improving the desired milling action.
  • the modification according to Figs. 7 and 8 provides a convex front end having a diametrical notch located between two parallel protrusions 7 adapted to improve the efficiency in piercing through the sheath when the latter has a higher resistance.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Multi-Conductor Connections (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
EP98100455A 1997-01-20 1998-01-13 Broche filetée pour la borne d'un câble électrique adapté pour créer un contact électrique à percement d'isolation Withdrawn EP0854538A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT97GE000004 IT1293186B1 (it) 1997-01-20 1997-01-20 Viti mangiaguaine di conduttori elettrici
ITGE970004 1997-01-20
IT97GE000035 IT1293204B1 (it) 1997-04-16 1997-04-16 Viti sfaldaguaine di conduttori elettrici.
ITGE970035 1997-04-16

Publications (2)

Publication Number Publication Date
EP0854538A2 true EP0854538A2 (fr) 1998-07-22
EP0854538A3 EP0854538A3 (fr) 1999-09-08

Family

ID=26330632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100455A Withdrawn EP0854538A3 (fr) 1997-01-20 1998-01-13 Broche filetée pour la borne d'un câble électrique adapté pour créer un contact électrique à percement d'isolation

Country Status (1)

Country Link
EP (1) EP0854538A3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1734612A3 (fr) * 2005-06-16 2010-02-10 Weidmüller Interface GmbH & Co. KG Dispositif de connexion pour câbles
CN111697361A (zh) * 2020-05-21 2020-09-22 国网浙江省电力有限公司嘉兴供电公司 一种不断电换电表的装置及方法
CN111769374A (zh) * 2020-05-28 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 一种便捷型旋进破皮式接线夹
CN111769375A (zh) * 2020-05-28 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 一种安全型旋进破皮式接线夹
CN111769376A (zh) * 2020-05-21 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 一种旋进破皮接线夹
CN111864415A (zh) * 2020-06-11 2020-10-30 国网浙江省电力有限公司嘉兴供电公司 一种接线夹及基于该接线夹的低压设备更换方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE61078C (de) * M. SEEHOF in Cassel, Wolf hagerstr. 21 II Vorrichtung zur Verbindung isolirter elektrischer Leitungsdrähte
GB191206146A (en) * 1912-03-12 1913-02-06 Frank Leonard Yates Improvements in or relating to the Coupling Up of Conduits and Fittings for Electrical Wiring Purposes.
DE1168518B (de) * 1961-04-17 1964-04-23 Alois Schiffmann Dipl Kfm Druckschraube einer Schraubklemme
DE1928341A1 (de) * 1969-06-04 1970-12-10 Stotz Kontakt Gmbh Elektrische Anschlussklemme

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1734612A3 (fr) * 2005-06-16 2010-02-10 Weidmüller Interface GmbH & Co. KG Dispositif de connexion pour câbles
CN111697361A (zh) * 2020-05-21 2020-09-22 国网浙江省电力有限公司嘉兴供电公司 一种不断电换电表的装置及方法
CN111769376A (zh) * 2020-05-21 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 一种旋进破皮接线夹
CN111769374A (zh) * 2020-05-28 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 一种便捷型旋进破皮式接线夹
CN111769375A (zh) * 2020-05-28 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 一种安全型旋进破皮式接线夹
CN111864415A (zh) * 2020-06-11 2020-10-30 国网浙江省电力有限公司嘉兴供电公司 一种接线夹及基于该接线夹的低压设备更换方法
CN111864415B (zh) * 2020-06-11 2022-02-18 国网浙江省电力有限公司嘉兴供电公司 一种接线夹及基于该接线夹的低压设备更换方法

Also Published As

Publication number Publication date
EP0854538A3 (fr) 1999-09-08

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