US3769703A - Method of securing end contacts to cables - Google Patents

Method of securing end contacts to cables Download PDF

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Publication number
US3769703A
US3769703A US00173903A US3769703DA US3769703A US 3769703 A US3769703 A US 3769703A US 00173903 A US00173903 A US 00173903A US 3769703D A US3769703D A US 3769703DA US 3769703 A US3769703 A US 3769703A
Authority
US
United States
Prior art keywords
cable
collar
end contact
contact
core
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
US00173903A
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English (en)
Inventor
L Geominy
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3769703A publication Critical patent/US3769703A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y10T29/49181—Assembling terminal to elongated conductor by deforming
    • Y10T29/49185—Assembling terminal to elongated conductor by deforming of terminal
    • Y10T29/49192—Assembling terminal to elongated conductor by deforming of terminal with insulation removal

Definitions

  • ABSTRACT A method of providing end contacts on cable pieces [30] Foreign Application Priority Data Aug. 31, 1970 Netherlands.colour&
  • the invention relates to a method of securing end contacts to an electrical cable comprising a core provided with an electrical conductor and a fibre coating of an electrically insulating material.
  • the core may consist of electrically conducting'material or of a support provided with an electrical conductor.
  • the invention is of special importance forcables whose fibre coating cannot easily be removed from the core for some reason or other without damaging this core.
  • Such a cable is a heating cable provided with a core of an electrically insulating material on which a heating wire is helically wound and which has a fibre coating.
  • additional problems occur in connection with the electrical contacting and the tensile load to which the cable is subjected during assembly and possible use. It must be avoided that such a tensile load gives rise to damage of the core.
  • End contacts for electrical cables consist of a body provided with two aligned bores, the bore of small diameter being able to accommodate the electrical conductor and the bore of large diameter being able to accommodate the electrical conductor together with the electrically insulating envelope.
  • the cross-section of the end contact is locally reduced by means of tools suitable for this purpose in such a manner that the end-contact is clamped tightly tothe cable.
  • a satisfactory securement is, however, only obtained when in case of tensile load thecore of the cable does not deform elastically and/or plastically in such a manner that it slides from out of the end contact.
  • An object of the present invention is, to provide a method of securing end contacts to cables of the abovementioned kind which may be sujected to tensile load.
  • the end contact is secured to the cable by means of the method according to the invention in such a manner that damage of the core is avoided in case of tensile load.
  • a preferred embodiment of the method according to theinvention is characterized in that the cross-section of the part of the end contact encompassing the core is at least locally reduced after it has been provided. 7
  • the reduction in cross-section according to this embodiment of the method may be effected simultaneously with the reduction of the cross-section of the part having the larger internal diameter.
  • the end contact is obtained by folding from ametal sheet it is recommended to use a pin or screw for this purpose, which is provided'with a bush sliding over the end contact when the pin or screw is driven in. As a result it is avoided that the end contact is deformed when the pin or screwis driven in. After the pin or screw is completely inserted, the bush. can be 7 connected to the end contact by means of welding, soldering, or by reducing thecross-section.
  • the clamping pieces or collars to be provided on the cable may consist of strip-shaped or wire-shaped material which is secured around the'cable with a clamping fit.
  • the clamping pieces or collars may-consist of, for example, a metal bush or a wire or'foil wound on the cable in a single layer or in a spiral.
  • the method according to the invention is suitable for all kinds of cables comprising a corea'nd fibre coating and particularly for those cables in which a helically wound electrical conductor which extends throughout the length of the cable is present on a flexible core of electrically insulating material and in which the coating consists of fibres of electrically insulating material, for example, glass fibres.
  • Cables of the latter construction mayhave sectors extending in the longitudinal direction of the cable which have mutually different temperatures during use: sectors which reach a high temperature during use may be alternated, for example, by Seetors whose temperature exceeds the ambiant temperature only to a slight extent during use. This effect may be brought about in various and mutually essentially different manners, namely ,by
  • the flexible core of electrically insulating material of such cables may consist of synthetic resin or a flexible inorganic material such as glass fibres or asbestos fibres.
  • the heating wire consists of a metal or alloy commonly used for this purpose.
  • the outer coating consists of one or more braids and/or spinnings of, for example, glass fibre or a different fibre material.
  • FIGS. 1 to show different stages of the method according to the invention
  • FIGS. 6 to 11 show different embodiments partly in side and front elevational views, partly in a crosssection of end contacts which are used in the method according to the invention.
  • FIG. 1 a resistance heating cable 1 is shown in a side elevational view.
  • the cable has a coating 2 partly removed in FIG. 1 consisting of a braid of glass fibres.
  • the cable has a core consisting of a sup-- port 3 likewise of glass fibres on which a heating wire 4 is wound helically.
  • Two collars 5 and 6 of metal strip are clamped on the cable. Subsequently the cable is cut through in accordance with the broken line at A.
  • One of the cable pieces then obtained is shown in FIG. 2.
  • the glass fibre braid is loosened (7) on the part of the cable to the right of the collar 5 in FIG. 2. For the sake of clarity part of these loosened glass fibres is not shown.
  • the glass fibres 7 are then folded back over the collar 5 (FIG. 3) and an end contact 8 of metal (for example, brass) is slid on the end of the cable.
  • metal for example, brass
  • This end contact has two bores 9' and 10 which are aligned, the bore 9 being a blind bore.
  • the diameter of the bores is'chosen preferably such that the support with the heating wire in bore 9 and the cable with collar 5 and folded glass fibres 7 are provided in bore 10 with a'running fit.
  • FIG. 4 shows the end contact in a front elevational view. After the end contact 8 is slid on the cable end the cross-section of the bore 10 of large diameter is reduced at 11 on the side of the collar remote from the cable and next to the collar 5 by means of deformation tools s'uitable for this purpose. In order to bring about a satisfactory electrical contact between the electrical conductor 4 and the end contact 8 the cross-section .of the bore of small diameter is also reduced, for example,
  • FIG. 6 is a side elevational view andFI G. 7 is a crosssection of an embodiment of an end contact in which the part 13 accommodating the support with the heating wire has a rectangular cross-section.
  • FIG. 8 shows a further embodimentin a cross-section and FIG.9 shows an embodiment in a front elevational view.
  • the bore 9 extends up to the end of the pin-shaped part 14.
  • a pin as shown in FIG. 10 may be driven into the bore 9.
  • a pin 15 provided with a cylinder 16 as is shown in a cross-section] 1.
  • the part 15 is prevented from opening.
  • a further advantage is that no heat is developed within the part of the end contact encompassing the support with the electrical conductor, and as a result this part remains at a comparatively low temperature during use of the cable.
  • a method of securing an end contact to an electrical cable having a core of electrically insulating material, an electrical conductor wound about said core and fibre coating of electrically insulating material covering said conductor comprising the steps of securing a clamping collar about said fibre coating spaced from and near the end of said cable receiving said end contact, folding said fibre coating locatedbetween said collar and the end of said cable back over said collar and extending slightly therebeyond so that the conductor of said cable between said collar and the end of said cable is exposed, sliding an end contact having two aligned bores of different diameter onto the end of said cable so that said exposed conductor portion of said cable is received within the bore having the smaller diameter, said collar and folded fibre coating which extends slightly beyond the collar being accommodated within the larger of said bores, and reducing the crosss ection of said end contact at a point beyond said collar remote from the'end of the cable so as to secure said end contact to said cable by pressing saidfolded fibre coating against the unfolded fibre coating.

Landscapes

  • Processing Of Terminals (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US00173903A 1970-08-31 1971-08-23 Method of securing end contacts to cables Expired - Lifetime US3769703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7012888.A NL156011B (nl) 1970-08-31 1970-08-31 Elektrische kabel met eindcontact.

Publications (1)

Publication Number Publication Date
US3769703A true US3769703A (en) 1973-11-06

Family

ID=19810913

Family Applications (1)

Application Number Title Priority Date Filing Date
US00173903A Expired - Lifetime US3769703A (en) 1970-08-31 1971-08-23 Method of securing end contacts to cables

Country Status (9)

Country Link
US (1) US3769703A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5247555B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE771965A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA975416A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DK (1) DK136196B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2107088A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1338921A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL156011B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE385169B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372665A (en) * 1993-09-17 1994-12-13 General Motors Corporation Thermoplastic terminal encapsulation method and apparatus
EP0826930A3 (en) * 1996-09-02 1999-04-14 Warmup PLC Heating system
US20040053530A1 (en) * 2002-09-12 2004-03-18 Larry Buenz Coaxial cable connector and tool and method for connecting a coaxial cable

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8903319D0 (en) * 1989-02-14 1989-04-05 Strix Ltd Immersion heater
US6403935B2 (en) * 1999-05-11 2002-06-11 Thermosoft International Corporation Soft heating element and method of its electrical termination
FR2930026B1 (fr) 2008-04-09 2010-05-07 Nexter Munitions Munition de gros calibre chargee par l'arriere

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863132A (en) * 1944-10-28 1958-12-02 Amp Inc Electrical connector with insulated ferrule
DE1178919B (de) * 1959-09-18 1964-10-01 Phelps Dodge Copper Prod Verbinder fuer konzentrische Kabel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863132A (en) * 1944-10-28 1958-12-02 Amp Inc Electrical connector with insulated ferrule
DE1178919B (de) * 1959-09-18 1964-10-01 Phelps Dodge Copper Prod Verbinder fuer konzentrische Kabel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372665A (en) * 1993-09-17 1994-12-13 General Motors Corporation Thermoplastic terminal encapsulation method and apparatus
US5434361A (en) * 1993-09-17 1995-07-18 General Motors Corporation Thermoplastic terminal encapsulation method and apparatus
EP0826930A3 (en) * 1996-09-02 1999-04-14 Warmup PLC Heating system
US20040053530A1 (en) * 2002-09-12 2004-03-18 Larry Buenz Coaxial cable connector and tool and method for connecting a coaxial cable
US7134189B2 (en) 2002-09-12 2006-11-14 Andrew Corporation Coaxial cable connector and tool and method for connecting a coaxial cable

Also Published As

Publication number Publication date
DK136196B (da) 1977-08-29
NL156011B (nl) 1978-02-15
FR2107088A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-05-05
DE2141737B2 (de) 1976-03-18
CA975416A (en) 1975-09-30
NL7012888A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-03-02
JPS5247555B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-12-03
SE385169B (sv) 1976-06-08
DE2141737A1 (de) 1972-03-02
BE771965A (fr) 1972-02-29
GB1338921A (en) 1973-11-28
DK136196C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-01-30

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