US2061350A - Method of covering wires - Google Patents

Method of covering wires Download PDF

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Publication number
US2061350A
US2061350A US22834A US2283435A US2061350A US 2061350 A US2061350 A US 2061350A US 22834 A US22834 A US 22834A US 2283435 A US2283435 A US 2283435A US 2061350 A US2061350 A US 2061350A
Authority
US
United States
Prior art keywords
elements
conductors
lengthening
sheath
proceeding
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
US22834A
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English (en)
Inventor
Coupier Marcel Marie Jo Eugene
Heilmann Josue Rodolphe
Milde Charles Emmanuel
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.)
Pyrotenax Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2061350A publication Critical patent/US2061350A/en
Anticipated expiration legal-status Critical
Assigned to PYROTENAX LIMITED reassignment PYROTENAX LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PRECISION MECANIQUE LABINAL, SOCIETE ALSACIENNE CONSTRUCTIONS MECANIQUES
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/16—Rigid-tube cables
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49879—Spaced wall tube or receptacle
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod

Definitions

  • Such cables which possess the great advantage of being incombustible, are usually manufactured in one of two ways.
  • Thel more simple manner consists in disposing in a metallic tube, the cylinder or cylinders constituting the conductors,
  • Another manner giving rise to successful results consists in forming the mineral powder in situ; for example magnesium strips are wound round the conductors or wires and are disposed inside the outer sheath, tube or the like; then a current of steam is caused to ilow inside said sheath; the
  • magnesium is thus transformed into magnesia; which expands and entirely lls the hollow space remaining between the conductors and the inner wall of the sheath.
  • This assembly may then be submitted to the mechanical lengthening treatment as above.
  • the first of the above disclosed procedures presents the drawback that it is very difficult to prevent the conductors from being displaced slightly with reference to the sheath during the diierent operations, so that the cable consequently is not exactly centered.
  • the present invention is directed to an improved method of manufacture of cables of this kind, and consists in disposing the insulating material around the conductors after having iirst imparted to this material the form of elements of compressed powder the said elements retaining the conductors in their respective places.
  • each of the above disclosed elements are divided into several parts by longitudinal sections, say plane or helical, and said parts are juxtaposed on the conductors and are held in their 5o places by a suitable sheath such as a metallic tube, a braiding, a covering or the like.
  • Figure 1 is a-perspective view of an element used in a rough piece intended to be lengthened for producing a cable having three conductors.
  • Fig. 2 is a cross-section of a rough piece for a cable having a single conductor.
  • Figs. 3 and 4 are cross-sectional views showing 5 elements capable of being interlocked with each other.
  • Fig. 5 shows part of an elementcapable of being used either vfor a rough piece intended to be lengthened or for true cable of considerable 10 length.
  • Fig. 6 shows how the parts of elements illustrated in Fig. 5 may be used for manufacturing a continuous cable.
  • Fig. 7 is a perspective View of an element having 15 a helical section.
  • Fig. 8 shows an element of modified shape.
  • Fig. 1 shows such a block designed to be used 25 in a cable having three conductors
  • Fig. 2 shows a rough piece prepared for manufacture by lengthening an insulated conductor covered with a tu- .bular sheath.
  • a conductive stem i of copper On a conductive stem i of copper, are disposed 30 cylindrical elements 2, made of compressed powder, similar to those of Fig. 1 with the exception that they are each provided with a single aper-lI ture instead of with three.
  • These blocks or elements are formed from mineral powder, which is 35 compressed in moulds by any suitable machine, 'the powder at that time being either dry or wetted in order to produce a dough.
  • the assembly is surrounded by a sheath 3, say a lead tube, whereupon the nal assembly is 40 lengthened by a suitable mechanical process such as rolling, drawing, or the like; during all those operations the elements 2 keep the conductor l centered in the axis of sheath 3, and as a consequence of the lengthening operation, these ele- 45 ments are crushed and the mineral material returns to its original state; i. e. reduced to powder.
  • the elements may be soaked before use in a suitable solution such as boric acid. It is also possible to provide the apertured blocks on their inner or outer ends or both with very thin sheaths of 'either metal or paper the thickness of which is negligible with reference to the other dimensions o! the element, the central bore 55 thereof remaining of course uncovered.
  • the sheath may also be applied around a. previously prepared element. FinalLv the sheath may also consist of a suitable coating which becomes solid upon drying.
  • FIG. 3 shows several elements interlocked with each other byvirtue of their frusta-conical joints 1.
  • the se elements are shown as encased in inner and outer sheaths l and 9 of suitable material, say in paper.
  • Fig. 4 shows in cross-section a single element provided at one end with a spherical central recess and at the other end with asimilarly shaped projection, so that the projection of one element may penetrate in the recess of the following one.
  • Fig.- 5 is a perspective view of one half of an element I3 similar to that represented in Fig. 4.
  • Fig. 6 shows by way of example how a single wire cable provided with an external braiding may be manufactured in a continuous manner by means oflparts of elements such as those represented in Fig. 5.
  • Wire I is driven in a continuous manner in the direction of the arrow; during its progression it penetrates elements il, i2 similar to those of Fig. 5 so that these latter are disposed around it.
  • the figure shows an element Il just ready to be positioned in place, the assembly is wrapped with a braiding I4, say of textile material, by means of any convenient known machine.
  • the elements such as i3 are disposed on the wire just at the point where the braiding is woven into position. It is easy to see in the gure that the elements are kept in place at the same time by being intcrlocked by means of their projections and receases and by being enclosed in the braiding. 0f course it would be better to stagger the planes forming the joints of the consecutive elements with reference to each other.
  • the sections instead of being planes, may be given the shape of helical surfaces, and moreparticularly that of square threaded screws, or better of helical surfaces the generatrix of which remains parallel to those of a cone but do not meet the axis, in order to lengthen the leak lines passing through the joints.
  • a proceeding for manufacturing electric insulated conductors with an external sheath and a mineral insulating material consisting in preparing elements with a compressed powder of the insulating material, said elements being disposed between the conductors and sheath and the whole being then submitted to a mechanical lengthening treatment.
  • the external cylindrical surface of the element being covered with a thin layer of suitable material, the elements being provided at one end with a recess and at the other end with a similarly shaped projection.
  • each -element is ⁇ divided in several parts so disposed as to be capable of assembly together about the conductor, the sections being shaped as helical surfaces, each element being provided at one end with a recess and at the other end 10 with a similarly shaped projection.

Landscapes

  • Insulated Conductors (AREA)
US22834A 1934-05-29 1935-05-22 Method of covering wires Expired - Lifetime US2061350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR664935X 1934-05-29

Publications (1)

Publication Number Publication Date
US2061350A true US2061350A (en) 1936-11-17

Family

ID=9012975

Family Applications (1)

Application Number Title Priority Date Filing Date
US22834A Expired - Lifetime US2061350A (en) 1934-05-29 1935-05-22 Method of covering wires

Country Status (5)

Country Link
US (1) US2061350A (it)
DE (1) DE664935C (it)
FR (1) FR773788A (it)
GB (1) GB445070A (it)
NL (1) NL40958C (it)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2642468A (en) * 1950-09-15 1953-06-16 United States Steel Corp Thermocouple mounting for use in molten steel
US2663754A (en) * 1950-07-18 1953-12-22 Joseph F Bianco Slotted dielectric coaxial line and process for making same
US2756492A (en) * 1952-09-13 1956-07-31 Eaton Mfg Co Manufacture of composite ductile wire
US2813921A (en) * 1954-05-10 1957-11-19 Rem Cru Titanium Inc Consumable electrode for melting of chemically reactive metals
US2924557A (en) * 1954-10-21 1960-02-09 Forse Corp Reclamation system for volatile solvents and apparatus therefor
US4320253A (en) * 1978-09-29 1982-03-16 Joseph Fisher Ceramic beads for heaters
US4420881A (en) * 1980-09-23 1983-12-20 Les Cables De Lyon Method of manufacturing a preform for mineral-insulated electric cable
US4569708A (en) * 1984-07-16 1986-02-11 Shinko Kosen Kogyo Kabushiki Kaisha Method for covering cables with sheaths for corrosion protection and/or aesthetics
US20060121800A1 (en) * 2002-08-31 2006-06-08 Helmut Weyl Connecting lead for a sensor
US11871486B2 (en) 2017-02-01 2024-01-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE412573A (it) * 1935-10-25
DE975586C (de) * 1943-01-29 1962-02-01 Hackethal Draht Und Kabel Werk Verfahren zur Herstellung von elektrischen Leitern mit einer biegsamen Isolierung aus thermoplastischen Kunststoffen
GB9010582D0 (en) * 1990-05-11 1990-07-04 Ass Elect Ind Manufacture of mineral insulated electric cables

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663754A (en) * 1950-07-18 1953-12-22 Joseph F Bianco Slotted dielectric coaxial line and process for making same
US2642468A (en) * 1950-09-15 1953-06-16 United States Steel Corp Thermocouple mounting for use in molten steel
US2756492A (en) * 1952-09-13 1956-07-31 Eaton Mfg Co Manufacture of composite ductile wire
US2813921A (en) * 1954-05-10 1957-11-19 Rem Cru Titanium Inc Consumable electrode for melting of chemically reactive metals
US2924557A (en) * 1954-10-21 1960-02-09 Forse Corp Reclamation system for volatile solvents and apparatus therefor
US4320253A (en) * 1978-09-29 1982-03-16 Joseph Fisher Ceramic beads for heaters
US4420881A (en) * 1980-09-23 1983-12-20 Les Cables De Lyon Method of manufacturing a preform for mineral-insulated electric cable
US4569708A (en) * 1984-07-16 1986-02-11 Shinko Kosen Kogyo Kabushiki Kaisha Method for covering cables with sheaths for corrosion protection and/or aesthetics
US20060121800A1 (en) * 2002-08-31 2006-06-08 Helmut Weyl Connecting lead for a sensor
US11871486B2 (en) 2017-02-01 2024-01-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable
US11956865B2 (en) 2017-02-01 2024-04-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Also Published As

Publication number Publication date
DE664935C (de) 1938-09-08
NL40958C (it)
GB445070A (en) 1936-04-02
FR773788A (fr) 1934-11-26

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