US3325321A - Method of making coaxial electric cables - Google Patents
Method of making coaxial electric cables Download PDFInfo
- Publication number
- US3325321A US3325321A US344632A US34463264A US3325321A US 3325321 A US3325321 A US 3325321A US 344632 A US344632 A US 344632A US 34463264 A US34463264 A US 34463264A US 3325321 A US3325321 A US 3325321A
- Authority
- US
- United States
- Prior art keywords
- polythene
- inner conductor
- metal strip
- outer conductor
- cylinders
- 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
Links
Images
Classifications
-
- 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
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
-
- 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
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
- H01B11/1852—Construction of the insulation between the conductors of longitudinal lapped structure
-
- 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
- H01B13/06—Insulating conductors or cables
- H01B13/18—Applying discontinuous insulation, e.g. discs, beads
-
- 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
- H01B13/06—Insulating conductors or cables
- H01B13/18—Applying discontinuous insulation, e.g. discs, beads
- H01B13/20—Applying discontinuous insulation, e.g. discs, beads for concentric or coaxial 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1036—Bending of one piece blank and joining edges to form article
Definitions
- a coaxial cable which includes an inner conductor, an outer conductor and electrical insulating material supporting the inner conductor and bonded to the outer conductor.
- a method of manufacturing a coaxial cable which includes the steps of placing electrical insulation around an inner conductor, placing an outer conductor round the insulation and bonding the electrical insulation to the outer conductor.
- FIG. 1 is a perspective view of a coaxial cable with a portion of the outer conductor removed
- FIG. 2 is a similar perspective view to that shown in FIG. 1, but of a different coaxial cable
- FIG. 3 is a perspective view of a metal strip, with pieces of insulation, disposed thereon, and
- FIG. 4 is a perspective view of a coaxial cable having the metal strip in FIG. 3 applied as an outer conductor
- FIG. 5 is a perspective view of another metal strip, with pieces of insulation.
- FIG. 1 there is shown an inner conductor 1, cellular polythene insulating cylinders 2, and an outer conductor 3.
- the insulating cylinders 2 have a radial slit 4 and on the inner surface of the outer conductor 3 there is a polythene coating 5 which is bonded to the insulating cylinders 2.
- the coaxial cable is manufactured by extruding cellular polythene insulating material in a continuous length of cylinderical shape, cuttingit into the cylinders 2, and then cutting the slits 4 in the cylinders 2.
- the cylinders 2 are then placed on the inner conductor 1 at spaced intervals along its length by pressing the inner conductor 1 in the slots 4.
- the outer conductor 3 in the form of a polythene coated metal strip is longitudinally folded round the cylinders 2 with the polythene coating 5 on the inside.
- the outer conductor 3 is then heated to weld the cylinders 2 to the polythene coating 5.
- the cylinders 2 may be replaced by continuous solid or cellular polythene insulation which is extruded directly about the inner conductor 1.
- the outer conductor 3 may be formed by helically winding one or more polythene coated tapes round the cylinders 2.
- the inner conductor 1 has spaced discs 6 of polythene on it instead of the cylinders 2 of cellular polythene. In the discs 6 there is a radial slit 7.
- This alternative construction of coaxial cable is manufactured in a similar manner to the coaxial cable shown in FIG. 1, with the discs 7 bonded to the coating 5.
- FIGS. 3 and 4 there is shown a metal strip 8 having a polythene coating 9 and pads 10 of cellular polythene bonded to the polythene coating 9.
- the metal strip 8 together with the pads 10 is shown being folded round an inner conductor 11. This forms a construction with an outer conductor 12 separated from the inner conductor 11 by the pads 10 which are bent to form cylinders round the inner conductor 11.
- the pads 10 are cut from a strip of extruded cellular polythene and placed on the polythene coating 9. The assembly is then heated to bond the polythene coating 9 to the pads 10.
- strips of polythene may replace the pads 10 of cellular polythene. These polythene strips may cross the metal strip at right angles and so form discs round the inner conductor 11 when the metal strip 8 is folded round it. As shown in FIG. 5, the polythene strips 13 also may cross the metal strip 8 diagonally in such a manner that they provide a continuous helix round the inner conductor 11 with the ends of different strips in contact. With reference to FIGURE 5, ends A and B would interface, and ends C and D as well, forming a helical insulation about conduct-or 11 when metal strip 8 is folded.
- the outer conductor is bonded to the insulating material supporting the inner conductor by means of heating which causes fusion to take place between the insulating material and a layer of similar material on the inner surface of the outer conductor.
- 'It is not essential for the two materials to be similar so long as they are capable of fusing together, and the layer of material need not be continuous between the pieces of supporting insulating material.
- the supporting material need not be bonded to the outer conductor through the intermediary of a similar material.
- An adhesive layer may be applied directly to the inner surface of the outer conductor, and the supporting material may be bonded by means of this layer to the outer conductor. It is possible for the adhesive layer to be applied to the supporting material.
- a method of manufacturing a coaxial cable comprising the steps of:
- thermoplastic insulating material bonding longitudinally spaced quadrangular pieces of thermoplastic insulating material to a longitudinal metal strip
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Communication Cables (AREA)
- Cable Accessories (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8316/63A GB990002A (en) | 1963-03-01 | 1963-03-01 | Electric cables |
Publications (1)
Publication Number | Publication Date |
---|---|
US3325321A true US3325321A (en) | 1967-06-13 |
Family
ID=9850198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US344632A Expired - Lifetime US3325321A (en) | 1963-03-01 | 1964-02-13 | Method of making coaxial electric cables |
Country Status (7)
Country | Link |
---|---|
US (1) | US3325321A (ru) |
AT (1) | AT256210B (ru) |
BE (1) | BE644552A (ru) |
CH (1) | CH419266A (ru) |
DE (1) | DE1590537A1 (ru) |
GB (1) | GB990002A (ru) |
NL (1) | NL6401968A (ru) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3436287A (en) * | 1965-07-02 | 1969-04-01 | Bell Telephone Labor Inc | Coaxial cable manufacturing method |
US3497367A (en) * | 1964-10-02 | 1970-02-24 | Commw Scient Ind Res Org | Opaline materials and method of preparation |
US4859534A (en) * | 1984-11-19 | 1989-08-22 | Chemical Vulcanising Systems (Proprietary) Limited | Method and apparatus for repairing a cable |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3660589A (en) * | 1969-09-29 | 1972-05-02 | Gen Cable Corp | Watertight disc coaxial cable |
GB8500034D0 (en) * | 1985-01-02 | 1985-02-13 | Telephone Cables Ltd | Coaxial cables |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1757030A (en) * | 1927-04-25 | 1930-05-06 | Watson John Francis | Electric cable |
US2060162A (en) * | 1932-06-30 | 1936-11-10 | Western Electric Co | Electric cable and apparatus for manufacturing it |
US2269991A (en) * | 1940-03-08 | 1942-01-13 | Gen Electric | High frequency transmission line |
GB584153A (en) * | 1944-10-20 | 1947-01-08 | Standard Telephones Cables Ltd | Improvements in or relating to electric communication cables |
US2453313A (en) * | 1943-04-29 | 1948-11-09 | Bell Telephone Labor Inc | Method of manufacturing communication cables |
FI24206A (fi) * | 1947-10-13 | 1950-03-10 | Int Standard Electric Corp | Elektrisk kabel för överföring av höga frekvenser |
US2803730A (en) * | 1955-05-04 | 1957-08-20 | Kaiser Aluminium Chem Corp | Method of forming lined tubing |
US2808450A (en) * | 1950-11-22 | 1957-10-01 | Melville F Peters | Electric cables and the method of making the same |
US3121136A (en) * | 1960-07-04 | 1964-02-11 | Mildner Raymond Charles | Co-axial cable having inner and outer conductors corrugated helically in opposite directions |
US3146297A (en) * | 1960-02-25 | 1964-08-25 | Felten & Guilleaume Carlswerk | Coaxial cable with helical insulating spacer |
US3173990A (en) * | 1962-08-27 | 1965-03-16 | Andrew Corp | Foam-dielectric coaxial cable with temperature-independent relative conductor length |
US3177286A (en) * | 1962-09-18 | 1965-04-06 | Tellite Corp | Co-axial cable with helical insulation |
-
1963
- 1963-03-01 GB GB8316/63A patent/GB990002A/en not_active Expired
-
1964
- 1964-02-13 US US344632A patent/US3325321A/en not_active Expired - Lifetime
- 1964-02-28 CH CH253664A patent/CH419266A/de unknown
- 1964-02-28 NL NL6401968A patent/NL6401968A/xx unknown
- 1964-02-29 DE DE19641590537 patent/DE1590537A1/de active Pending
- 1964-03-02 AT AT180364A patent/AT256210B/de active
- 1964-03-02 BE BE644552D patent/BE644552A/xx unknown
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1757030A (en) * | 1927-04-25 | 1930-05-06 | Watson John Francis | Electric cable |
US2060162A (en) * | 1932-06-30 | 1936-11-10 | Western Electric Co | Electric cable and apparatus for manufacturing it |
US2269991A (en) * | 1940-03-08 | 1942-01-13 | Gen Electric | High frequency transmission line |
US2453313A (en) * | 1943-04-29 | 1948-11-09 | Bell Telephone Labor Inc | Method of manufacturing communication cables |
GB584153A (en) * | 1944-10-20 | 1947-01-08 | Standard Telephones Cables Ltd | Improvements in or relating to electric communication cables |
FI24206A (fi) * | 1947-10-13 | 1950-03-10 | Int Standard Electric Corp | Elektrisk kabel för överföring av höga frekvenser |
US2808450A (en) * | 1950-11-22 | 1957-10-01 | Melville F Peters | Electric cables and the method of making the same |
US2803730A (en) * | 1955-05-04 | 1957-08-20 | Kaiser Aluminium Chem Corp | Method of forming lined tubing |
US3146297A (en) * | 1960-02-25 | 1964-08-25 | Felten & Guilleaume Carlswerk | Coaxial cable with helical insulating spacer |
US3121136A (en) * | 1960-07-04 | 1964-02-11 | Mildner Raymond Charles | Co-axial cable having inner and outer conductors corrugated helically in opposite directions |
US3173990A (en) * | 1962-08-27 | 1965-03-16 | Andrew Corp | Foam-dielectric coaxial cable with temperature-independent relative conductor length |
US3177286A (en) * | 1962-09-18 | 1965-04-06 | Tellite Corp | Co-axial cable with helical insulation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3497367A (en) * | 1964-10-02 | 1970-02-24 | Commw Scient Ind Res Org | Opaline materials and method of preparation |
US3436287A (en) * | 1965-07-02 | 1969-04-01 | Bell Telephone Labor Inc | Coaxial cable manufacturing method |
US4859534A (en) * | 1984-11-19 | 1989-08-22 | Chemical Vulcanising Systems (Proprietary) Limited | Method and apparatus for repairing a cable |
Also Published As
Publication number | Publication date |
---|---|
CH419266A (de) | 1966-08-31 |
NL6401968A (ru) | 1964-09-02 |
AT256210B (de) | 1967-08-10 |
DE1590537A1 (de) | 1969-08-21 |
GB990002A (en) | 1965-04-22 |
BE644552A (ru) | 1964-09-02 |
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