US3531576A - Coaxial high frequency cable - Google Patents

Coaxial high frequency cable Download PDF

Info

Publication number
US3531576A
US3531576A US731985A US3531576DA US3531576A US 3531576 A US3531576 A US 3531576A US 731985 A US731985 A US 731985A US 3531576D A US3531576D A US 3531576DA US 3531576 A US3531576 A US 3531576A
Authority
US
United States
Prior art keywords
inner conductor
dielectric
members
spacer
high frequency
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
US731985A
Other languages
English (en)
Inventor
Helmut Hildebrand
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.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
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 KM Kabelmetal AG filed Critical KM Kabelmetal AG
Application granted granted Critical
Publication of US3531576A publication Critical patent/US3531576A/en
Anticipated expiration legal-status Critical
Assigned to CHASE MANHATTAN BANK, AS ADMINISTRATIVE AGENT, THE reassignment CHASE MANHATTAN BANK, AS ADMINISTRATIVE AGENT, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASPEN LABORATORIES, INC. (CO CORPORATION), BIRTCHER MEDICAL SYSTEMS, INC. (CA CORPORATION), CONMED ANDOVER MEDICAL, INC. (NY CORPORATION), CONMED CORPORATION (NY CORPORATION), CONSOLIDATED MEDICAL EQUIPMENT INTERNATIONAL, INC. (NY CORPORATION), ENVISION MEDICAL CORPORATION, (CA CORPORATION), LINVATEC CORPORATION (FL CORPORATION), NDM, INC. (NY CORPORATION)
Expired - Lifetime legal-status Critical Current

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
    • H01B11/1873—Measures for the conductors, in order to fix the spacers
    • 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
    • H01B11/1856—Discontinuous insulation

Definitions

  • a solid dielectric which has a small dielectric loss angle, a small dielectric constant and a volume which is minimal as compared to the total volume of the space between the conductors.
  • dielectric discs suitably mounted on the inner conductor at determined axial spacings; the discs being formed of a minimum amount of material, and with openings in the discs to further reduce the quantity of material used.
  • dielectric spacers have been provided in the form of three upstanding columnar support members extending radially from a ring shaped member at 120 intervals; the ring shaped member being adapted to be snapped about the inner conductor.
  • the individual columnar members are afiixed in upstanding relation to a continuous strip at a determined spacing from each other, the strip then being wound helically about the inner conductor.
  • the columnar members include a T shaped outer end portion for hearing against the inner surface of the outer conductor, the outer end portion extending substantially axially of the cable, thus being particularly effective in supporting outer conductors of the corrugated type.
  • an object of this invention is to provide improved dielectric spacer means for coaxial cables comprising individual spacer members arranged in spaced relation to each other and being individually mounted on the inner conductor so as to greatly minimize leakage losses.
  • Another object of this invention is to provide dielectric spacer members of the character described, which provide high mechanical load capacity.
  • Still another object of this invention is to provide dielectric spacer members of the character described which provide materially reduced amounts of solid dielectric in zones immediately adjacent the inner conductor where the highest field strength is found in the dielectric portions at the inner conductor.
  • Yet another object of this invention is to provide improved dielectric spacer members of the character described, which materially reduce the amount of solid dielectric required, thus reducing manufacturing costs, while retaining good load capacity and providing a substantial reduction in leakage losses.
  • FIG. 1 is a transverse elevational view showing a dielectric spacer construction embodying the invention
  • FIG. 2 is a side elevational view thereof
  • FIG. 3 is a view similar to that of FIG. 1, showing the spacer construction applied to a corrugated inner conductor;
  • FIG. 4 is a side elevational view thereof.
  • FIGS. 1 and 2 designates a dielectric spacer construction embodying the invention.
  • the same comprises individual spacer members generally indicated at 11 which are fixed in upstanding relation to the usual inner conductor 12.
  • the spacer members 11 are formed of molded synthetic resin of suitable dielectric value and include a tapered pin portion 13 extending downwardly from a footing portion 14 which is adapted to seat on the outer surface of inner conductor 12.
  • the inner conductor 12 is prepunched with spaced openings for receiving the pin portions 13. The openings are arranged to locate members 11 in spaced relation to each other, and preferably in a spiral line about conductor 12.
  • the pin portions 13 may be of metal, particularly when the inner conductor 12 is quite thin. In such case, the metal pin portions 13 may be pressed directly into the wall of inner conductor 12, at the selected locations.
  • the spacer members 11 include reinforcing rib portions 15 and an elongated support surface 16 at the outer ends thereof.
  • the members 11 are so mounted on inner conductor 12 so as to have the elongated support surfaces 16 thereof extending axially of the conductor 12 to thereby provide support for the usual outer conductor, not shown, found in coaxial cables.
  • FIGS. 3 and 4 is shown another embodiment of the invention, wherein the inner conductor 12 is corrugated, the corrugations being shown at 17.
  • members 11 have their footing portions 14 formed with ribs 18 to be received in corrugations 17.
  • members 11 may be secured to inner conductor 12 by other means, as by adhesive, or the like.
  • a coaxial high frequency cable having inner and outer conductors, dielectric spacer means extending between said conductors, said spacer means comprising a plurality of separate, longitudinally spaced spacer members, each spacer member comprising an intermediate portion of limited, minimal cross section, a footing portion integral with the inner end of said intermediate portion and seated on a limited outer surface portion of said inner conductor, and pin means integral with and projecting from said footing portion, the wall of said inner conductor being formed with successive openings in axially and circumferentially displaced relation to each other for tightly receiving and engaging pin means of the respective spacer members, wherein said inner conductor is corrugated and the footing portion of said spacer members includes a rib portion receivable in said corrugations.

Landscapes

  • Communication Cables (AREA)
  • Waveguides (AREA)
US731985A 1967-05-26 1968-05-24 Coaxial high frequency cable Expired - Lifetime US3531576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0062374 1967-05-26

Publications (1)

Publication Number Publication Date
US3531576A true US3531576A (en) 1970-09-29

Family

ID=7230573

Family Applications (1)

Application Number Title Priority Date Filing Date
US731985A Expired - Lifetime US3531576A (en) 1967-05-26 1968-05-24 Coaxial high frequency cable

Country Status (5)

Country Link
US (1) US3531576A (en:Method)
BE (1) BE715279A (en:Method)
DE (1) DE1640698A1 (en:Method)
FR (1) FR1563569A (en:Method)
NL (1) NL6807388A (en:Method)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789129A (en) * 1972-06-06 1974-01-29 Felten & Guilleaume Ag Air-insulated coaxial high-frequency cable
US3996414A (en) * 1972-07-27 1976-12-07 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Spacer construction for gas insulated high voltage cable
US4095041A (en) * 1977-06-21 1978-06-13 Electric Power Research Institute Multiple part insulator for flexible gas-insulated transmission line cable
US20060048960A1 (en) * 2003-12-23 2006-03-09 Jeffrey Brown Inner conductor supports for rigid coaxial transmission lines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482912A (en) * 1935-11-18 1938-04-07 Siemens Ag Improvements in and relating to trunk communication electric cables
US2428051A (en) * 1940-05-02 1947-09-30 Int Standard Electric Corp Insulating spacer for coaxial cables

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482912A (en) * 1935-11-18 1938-04-07 Siemens Ag Improvements in and relating to trunk communication electric cables
US2428051A (en) * 1940-05-02 1947-09-30 Int Standard Electric Corp Insulating spacer for coaxial cables

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789129A (en) * 1972-06-06 1974-01-29 Felten & Guilleaume Ag Air-insulated coaxial high-frequency cable
US3996414A (en) * 1972-07-27 1976-12-07 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Spacer construction for gas insulated high voltage cable
US4095041A (en) * 1977-06-21 1978-06-13 Electric Power Research Institute Multiple part insulator for flexible gas-insulated transmission line cable
US20060048960A1 (en) * 2003-12-23 2006-03-09 Jeffrey Brown Inner conductor supports for rigid coaxial transmission lines

Also Published As

Publication number Publication date
DE1640698A1 (de) 1970-08-27
BE715279A (en:Method) 1968-10-16
NL6807388A (en:Method) 1968-11-27
FR1563569A (en:Method) 1969-04-11

Similar Documents

Publication Publication Date Title
US2804494A (en) High frequency transmission cable
US5742002A (en) Air-dielectric coaxial cable with hollow spacer element
US3495370A (en) Telescopic mast
US2583026A (en) Cable with interlocked insulating layers
US3789129A (en) Air-insulated coaxial high-frequency cable
US2847499A (en) Coaxial cable
US4705914A (en) High voltage flexible cable for pressurized gas insulated transmission line
DE1901069A1 (de) Koaxiale Mehrfachrohranordnung
US3514523A (en) Dielectric spacer for coaxial cable
US3492410A (en) Jacketed metallic conduit connector
US3286015A (en) Coaxial high frequency cable and insulating spacer
US3531576A (en) Coaxial high frequency cable
US4487660A (en) Multiple wall structure for flexible cable using tubular and spiral corrugations
US4018977A (en) High voltage cable with air dielectric
US2022839A (en) Electrical conductor
US3291898A (en) High voltage expanded electrical conductors
US2106060A (en) Electric cable
US3130355A (en) Electromagnet
US4174464A (en) Rod-type insulator having improved withstand voltage characteristics under a contaminated condition
US4263476A (en) Insulation spacer for gas-insulated transmission line with improved outer rim structure
US2075996A (en) Electrical conductor
US2461834A (en) Coaxial conductor
US3433883A (en) Cable construction
US2216893A (en) Concentric conductor transmission line
US2207522A (en) Concentric conductor transmission line

Legal Events

Date Code Title Description
AS Assignment

Owner name: CHASE MANHATTAN BANK, AS ADMINISTRATIVE AGENT, THE

Free format text: SECURITY INTEREST;ASSIGNORS:CONMED CORPORATION (NY CORPORATION);ASPEN LABORATORIES, INC. (CO CORPORATION);CONMED ANDOVER MEDICAL, INC. (NY CORPORATION);AND OTHERS;REEL/FRAME:009187/0010

Effective date: 19971231