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US2228798A - Manufacture of telephone cables - Google Patents

Manufacture of telephone cables Download PDF

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Publication number
US2228798A
US2228798A US209306A US20930638A US2228798A US 2228798 A US2228798 A US 2228798A US 209306 A US209306 A US 209306A US 20930638 A US20930638 A US 20930638A US 2228798 A US2228798 A US 2228798A
Authority
US
United States
Prior art keywords
sheath
core
layer
manufacture
telephone cables
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
US209306A
Other languages
English (en)
Inventor
Wassermann Gunter
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.)
Co "LE CONDUCTEUR ELECTRIQUE BLINDE INCOMBUSTIBLE"
Co LE CONDUCTEUR ELECTR B
Pyrotenax Ltd
Original Assignee
Co LE CONDUCTEUR ELECTR B
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 Co LE CONDUCTEUR ELECTR B filed Critical Co LE CONDUCTEUR ELECTR B
Application granted granted Critical
Publication of US2228798A publication Critical patent/US2228798A/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
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/28—Applying continuous inductive loading, e.g. Krarup loading
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/12—Arrangements for exhibiting specific transmission characteristics
    • H01B11/14—Continuously inductively loaded cables, e.g. Krarup cables
    • H01B11/146—Continuously inductively loaded cables, e.g. Krarup cables using magnetically loaded coatings
    • 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

Definitions

  • the object of the present invention is a process for manufacturing conductors which are intended for underground, submarine and aerial telephone cables having a high inductive filling, which comprise a core, a sheath and an intermediate layer of ferro-magnetic powder. According to a known process for manufacturing such conductors, the
  • powdered magnetic material fills the entire space between the core and the sheath, the tube thus 10 prepared is closed at both ends and the whole arrangement is reduced by mechanical working to the smallest desired cross-section;
  • the procem according to the invention simplifies the manufacture by enabling the operation to be eflected in another manner.
  • the particles of term-magnetic powder are not, as previously, brought into the shape of a powdered mass of high compactness by the mechanical working of the whole cable, but go the shape of compressed blocks is, on the contrary, given them beforethey are introduced into the sheath and they are then arranged one after the other on the core of the cable, inside the sheath.
  • the pressure exerted on the sheath during the drawing operation, for the purp e of reducing the cross-section is immediately transmitted from the sheath to said block by the intermediate layer.
  • the use of the compressed blocks according to the invention furthermore has the advantage that the core which is guided by the compressed blocks can be accurately centered in the sheath, which it is hardly possible to do with a filling of uncomgg pressed magnetic material.
  • the flexibility of the cables manufactured by the process according to the invention is in no way limited owing to the use of the compressed blocks made of ferro-magnetic powder, since the blocks remain suiliciently o flexible without losing any of their compactness during the mechanical working.
  • thelosses due to'eddy currents in the intermediate layer formed by previously compressed blocks are extremely low owing to the bad contact between the particles of powder which are insulated from each other according to the art of making massic cores for Pupin coils.
  • the powder'used by the process according to the invention may comprise iron or an ironnickel alloy, the elementary particles,'as-already stated, being insulated from each other according 10 to a well known process.
  • Figure 1 is a longitudinal sectional view of one 15 form of the invention.
  • Figure 2 is a similar view of a modified form of the invention.
  • a indicates the core while the sheath is shown at b.
  • an additional insulating layer 0, made for example of magnesia, is introduced between the sheath and the ferro-magnetic blocks, and said layer may if 80 necessary have the shape of rings of compressed powder which are subjected'with all of the conductors to the drawing operation which is intended to decrease the cross-section. It is of advantage to bring the blocks of ferro-magnetic powder and the rings of insulating powder into the form of high compactness and of dehydration before introducing into the sheath.
  • a process of manufacturing a conductor for telephone cables in which there is a conducting core, a metallic sheath and between said core and sheath an intermediate mass comprising ferromagnetic particles insulated from one another by an insulating material which comprises compressing. said mass containing said retro-magnetic particles into blocks, then assembling said blocks,
  • a process of manufacturing a conductor for telephone cables in which there is a conducting sheath an intermediate mass comprising ferromagnetic particles insulated irom one another by an insulating material in the form of compressed blocks.
  • a telephone cable comprising a conducting core, a metallic sheath, an annular layer of terromagnetic particles insulated from one another surrounding said core and an annular layer of powdered insulating material interposed between said sheath and layer of term-magnetic particles.
  • a telephone cable comprising a conducting core, a metallic sheath, an annular layer 0! ferromagnetic particles insulated from one another surrounding said core and an annular layer of powdered insulating material interposed between said sheath and layer of term-magnetic particles, said layers having a high compactness.
  • a process of manufacturing a conductor for telephone cables in which there is a conducting core and a metallic sheath surrounding said core comprising placing an annular layer oi. compressed blocks of term-magnetic particles insulated from one another about-said core interposing an annular layer of compressed powdered insulating material between said first mentioned layer and said sheath to form awork-piece and then subjecting said work-piece to a metallurgical drawing treatment until the desired elongation and diameter are obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
US209306A 1937-05-24 1938-05-21 Manufacture of telephone cables Expired - Lifetime US2228798A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE213119X 1937-05-24
DE280438X 1938-04-28

Publications (1)

Publication Number Publication Date
US2228798A true US2228798A (en) 1941-01-14

Family

ID=25761314

Family Applications (1)

Application Number Title Priority Date Filing Date
US209306A Expired - Lifetime US2228798A (en) 1937-05-24 1938-05-21 Manufacture of telephone cables

Country Status (5)

Country Link
US (1) US2228798A (xx)
BE (1) BE428241A (xx)
CH (1) CH213119A (xx)
GB (1) GB515116A (xx)
NL (1) NL60011C (xx)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423396A (en) * 1943-05-01 1947-07-01 Rca Corp Wave guide attenuator
US2423085A (en) * 1943-03-05 1947-07-01 Standard Telephones Cables Ltd Delay device
US2507358A (en) * 1945-08-31 1950-05-09 Gen Electric Delay transmission line
US2508479A (en) * 1944-11-16 1950-05-23 Hazeltine Research Inc High-frequency electromagneticwave translating arrangement
US2511610A (en) * 1944-11-16 1950-06-13 Hazeltine Research Inc High-frequency electromagneticwave translating element
US2594890A (en) * 1950-08-16 1952-04-29 Bell Telephone Labor Inc Contact protection arrangement
US2669603A (en) * 1951-01-31 1954-02-16 Transmission line with magnetic
US2727945A (en) * 1951-01-31 1955-12-20 Lignes Telegraph Telephon High frequency magnetic elements and telecommunication circuits
US2740834A (en) * 1951-06-29 1956-04-03 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2787656A (en) * 1954-12-30 1957-04-02 Bell Telephone Labor Inc Magnetically loaded conductors
US2796463A (en) * 1951-06-29 1957-06-18 Bell Telephone Labor Inc Composite conductors
US2825759A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded anisotropic transmitting medium
US2825760A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2825761A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2825762A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2831921A (en) * 1952-09-11 1958-04-22 Bell Telephone Labor Inc Loaded laminated conductor
US3413575A (en) * 1964-11-10 1968-11-26 Army Usa Low-loss, controllable parameter, transmission line
US3573676A (en) * 1964-11-26 1971-04-06 Ferdy Mayer Elements for the transmission of electrical energy
US3743978A (en) * 1969-12-09 1973-07-03 W Fritz Coated ferrite rf filters
USRE29258E (en) * 1969-12-09 1977-06-07 Amp Incorporated Coated ferrite RF filters
US4347487A (en) * 1980-11-25 1982-08-31 Raychem Corporation High frequency attenuation cable
US4920233A (en) * 1988-08-23 1990-04-24 Cooper Industries, Inc. Audio cable

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423085A (en) * 1943-03-05 1947-07-01 Standard Telephones Cables Ltd Delay device
US2423396A (en) * 1943-05-01 1947-07-01 Rca Corp Wave guide attenuator
US2508479A (en) * 1944-11-16 1950-05-23 Hazeltine Research Inc High-frequency electromagneticwave translating arrangement
US2511610A (en) * 1944-11-16 1950-06-13 Hazeltine Research Inc High-frequency electromagneticwave translating element
US2507358A (en) * 1945-08-31 1950-05-09 Gen Electric Delay transmission line
US2594890A (en) * 1950-08-16 1952-04-29 Bell Telephone Labor Inc Contact protection arrangement
US2669603A (en) * 1951-01-31 1954-02-16 Transmission line with magnetic
US2727945A (en) * 1951-01-31 1955-12-20 Lignes Telegraph Telephon High frequency magnetic elements and telecommunication circuits
US2796463A (en) * 1951-06-29 1957-06-18 Bell Telephone Labor Inc Composite conductors
US2825762A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2740834A (en) * 1951-06-29 1956-04-03 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2825759A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded anisotropic transmitting medium
US2825760A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2825761A (en) * 1951-06-29 1958-03-04 Bell Telephone Labor Inc Magnetically loaded electrical conductors
US2831921A (en) * 1952-09-11 1958-04-22 Bell Telephone Labor Inc Loaded laminated conductor
US2787656A (en) * 1954-12-30 1957-04-02 Bell Telephone Labor Inc Magnetically loaded conductors
US3413575A (en) * 1964-11-10 1968-11-26 Army Usa Low-loss, controllable parameter, transmission line
US3573676A (en) * 1964-11-26 1971-04-06 Ferdy Mayer Elements for the transmission of electrical energy
US3743978A (en) * 1969-12-09 1973-07-03 W Fritz Coated ferrite rf filters
USRE29258E (en) * 1969-12-09 1977-06-07 Amp Incorporated Coated ferrite RF filters
US4347487A (en) * 1980-11-25 1982-08-31 Raychem Corporation High frequency attenuation cable
US4920233A (en) * 1988-08-23 1990-04-24 Cooper Industries, Inc. Audio cable

Also Published As

Publication number Publication date
BE428241A (xx)
NL60011C (xx)
GB515116A (en) 1939-11-27
CH213119A (fr) 1941-01-15

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