US1970778A - Cable manufacture - Google Patents

Cable manufacture Download PDF

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Publication number
US1970778A
US1970778A US230620A US23062027A US1970778A US 1970778 A US1970778 A US 1970778A US 230620 A US230620 A US 230620A US 23062027 A US23062027 A US 23062027A US 1970778 A US1970778 A US 1970778A
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US
United States
Prior art keywords
cable
section
diameter
cross
sheathing
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
US230620A
Other languages
English (en)
Inventor
Sonnenfeld Hugo
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.)
SOCASO Ltd
Original Assignee
SOCASO Ltd
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 to NL22247D priority Critical patent/NL22247C/xx
Priority claimed from US143274A external-priority patent/US1838332A/en
Application filed by SOCASO Ltd filed Critical SOCASO Ltd
Priority to US230620A priority patent/US1970778A/en
Application granted granted Critical
Publication of US1970778A publication Critical patent/US1970778A/en
Anticipated expiration legal-status Critical
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
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • H01B13/245—Sheathing; Armouring; Screening; Applying other protective layers by extrusion of metal layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/06—Press heads, dies, or mandrels for coating work

Definitions

  • Patented Aug. 21, 1934 CABLE MANUEAcTtmE Hugo, Sonnenield, Bratislava, Czechoslovakia, assignor to Socaso Ltd., St. Gallen, Switzerland, a body corporate of Switzerland original application october 21, 1926, serial No. 143,274, now Patent No. 1,838,332, dated De-f cember 29, 1931. Divided and this application November 2, 1927, Serial No. 230,620.
  • sheathing of the built-up cable core was after- :f 4 nal shape is attained by the insertion of insulating llers, which being smaller, do not supplement the cross section of the stranded three or more conductor cables to a round shape, but only to a shape defined by the three or more stranded conductors and the tangente to the same. It is an object of this invention to provide a method of sheathing the stranded or unstranded conductors and insulating fillers in such a way that the inner surface of the lead sheath lays close at every place to this polygonal shaped cable structure.
  • the cable which is built up of separate conductors twisted together makes a purely longitudinally progressive movement during its passage through the cable press.
  • the matrix and counter die of the cable press have a rotational movement imparted to them corresponding to the twist upon the several conductors.
  • the sheathing of the built-up body of polygonal cross section with the metal is effected by the aid of a matrix and counter die of circular cross section.
  • Figure l, 2 denotes the-three separate conductors surrounded with insulation, which form the built-up body of polygonal cross section to be sheathed with lead.
  • 21 denotes the matrix of the cable press and 20 the counter die thereof. The matrix and the counter die are so constructed that they provide a circular cross section for the metal to be extruded.
  • the periphery of the circular'opening of the counter die 20 be exactly as large as the inner periphery of the lead sheathing shown in cross section and which is pressed around the cable, if we suppose that a contraction of the lead sheathing would not take place when pressed on.
  • the diameter of the circular opening of the matrix 21 is selected according to the desired thickness of the lead.
  • a hollow lead cylinder circular in crosssection would be formed at rst, but this will however at once adapt itself to the peripheral shape of the multiple conductor cable, and since the inner periphery of the circular cross section of the lead sheathing according to the present invention is equal to the periphery of the multiple conductor cable, the lead sheathing would rit itself closely to the multiple conductor cable and assume its required shape.
  • Ihe diameter of the circle circumscribed about the polygonal cross section is larger than the diameter of the circle of the same circumference as the polygonal cross section. It follows that the diameter of the counter die should be chosen smaller than the diameter of the circle which may be circumscribed about the vpolygonal cross section. Therefore the cable structure could not pass through the counter die, and the sheathing would be impossible.
  • the diameter Di of the circular counter die be chosen at least so large that the inner periphery U' ofthe circular hollow cylinder, which will be formed in consequence of the above mentioned shrinking, is equal to the external periphery U oi' the body of polygonal cross section which is to be sheathed with lead.
  • the counter 'die 20 is of a diameter Di which may conveniently be slightly greater but must be at least as great as the diameter Dro! the circle K1 which encloses the body of polygonal section, so that the body can be passed through the opening oi' the counter die 20.
  • the method of sheathing a -multiple conductor cable having three or more individually insulated conductors assembled to form a cable core substantially polygonal in cross section comprises extruding upon the cable core a lead tube which is circular in cross section having at the extruding temperaturean internal diameter substantially equal to the diameter of the smallest circle which can be circumscribed about the cable core, and permitting the lead tube to cool to cause it to contract and conform closely to the polygonal contour of the cable core.
  • the method of sheathing a multiple conductor cable having three or more individually insulated conductors assembled to form a cable core substantially polygonal in cross section comprises extruding upon the cable core a circular metal tube having at the extruding temperature an internal diameter at least as great as the diameter of the smallest circle which can be circumscribed about the cable core and using for the tube a metal which contracts sunlciently on cooling to conform closely to the ⁇ polygona1- contour of the cable core.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Electric Cables (AREA)
US230620A 1926-10-21 1927-11-02 Cable manufacture Expired - Lifetime US1970778A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL22247D NL22247C (enrdf_load_stackoverflow) 1926-10-21
US230620A US1970778A (en) 1926-10-21 1927-11-02 Cable manufacture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US143274A US1838332A (en) 1926-06-25 1926-10-21 Electric cable
US230620A US1970778A (en) 1926-10-21 1927-11-02 Cable manufacture

Publications (1)

Publication Number Publication Date
US1970778A true US1970778A (en) 1934-08-21

Family

ID=26840869

Family Applications (1)

Application Number Title Priority Date Filing Date
US230620A Expired - Lifetime US1970778A (en) 1926-10-21 1927-11-02 Cable manufacture

Country Status (2)

Country Link
US (1) US1970778A (enrdf_load_stackoverflow)
NL (1) NL22247C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL22247C (enrdf_load_stackoverflow)

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