US2116267A - Conductor with air space insulation - Google Patents

Conductor with air space insulation Download PDF

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Publication number
US2116267A
US2116267A US50034A US5003435A US2116267A US 2116267 A US2116267 A US 2116267A US 50034 A US50034 A US 50034A US 5003435 A US5003435 A US 5003435A US 2116267 A US2116267 A US 2116267A
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US
United States
Prior art keywords
conductor
helix
conductors
air space
insulating material
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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
US50034A
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English (en)
Inventor
Klimmer Franz
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.)
Felten and Guilleaume Carlswerk AG
Original Assignee
Felten and Guilleaume Carlswerk 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
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Publication of US2116267A publication Critical patent/US2116267A/en
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    • 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
    • H01B11/1847—Construction of the insulation between the conductors of helical wrapped structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/06—Gas-pressure cables; Oil-pressure cables; Cables for use in conduits under fluid pressure
    • 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
    • H01B11/20—Cables having a multiplicity of coaxial lines

Definitions

  • the capacity is reduced in proportion with the amount of insulating material employed and in proportion with the. dielectric constant of 'the insulating material.
  • the economy in insulating material must not be carried so far that the mechanical strength is thereby affected.
  • the angle of loss of the insulating material must be small.
  • the object of the invention is to construct such a cable in such a manner that whilst the capacity is as small as possible the required mechanical strength is ensured to a high degree.
  • the conductors are separated from one another by a holder consisting of a helix or helices which is or are self-sustaining, being made of an insulating material capable oi retaining the helical shape, the said helix or helices being "hollow and open.
  • a holder consisting of a helix or helices which is or are self-sustaining, being made of an insulating material capable oi retaining the helical shape, the said helix or helices being "hollow and open.
  • the latter expression is tobe understood as defining a helix the 2 interior or which is not filled by another material and the turns of which do not touch each other .but leave an air gap between them.
  • the said hollow and open helices may be either 1 parallel to the axis of the conductor or in their turn surround the inner conductor in helical lines.
  • a iurther advantage of the construction acw cording to the present invention consists in the easy manner of manufacture of such cables.
  • the individual elements of the cable may be simply bundled together and surrounded by the outer cover it their axes are to run parallel or they may 5 be stranded together in a known manner and then be surrounded by the outer cover.
  • Polystyrol has been found a suitable insulating material since it has a small dielectric constant, a small angle of loss, great mechanical strength,
  • . 3 more particularly with respect to torsion, and can easily be shaped.
  • Figure 1 illustrates in elevation and Figure 1a in cross-section a cable with a concentric arrangement of the conductors and-having a number or helices parallel to the axis.
  • Figure 2 illustrates in cross-section a cable with a plurality of conductors and a plurality oi helices
  • Figure 3 illustrates a cable with concentric arrangement of conductors and a distance holder in the form of a helix which is helically arranged.
  • Figure 4 illustrates a helically arranged helix having inserted therein a threadcanable of resisting tensional stresses.
  • Figure 5 illustrates an arrangement in which the hellxis secured on the conductor by means of a thread capable of resisting tensional stresses.
  • l is the inner conductor
  • 3 the outer conductor
  • 2 are helical threads of insulating material provided between the said two conductors, helices run parallel to the axis of the conductor.
  • Figure 2 shows in cross-section an arrangement having a number of coaxial conductors.
  • middle conducting layers 5 and 6 are separated The axes of the.
  • Figure 4 illustrates a conductor in which the helix acting as a distance member is providedwith a thread capable of resisting tensional stresses.
  • i2 is the storage reel of the helix it which is provided with the said tension resisting thread it, the conductor [5 being wound with the said helix from the storage reel l2.
  • Figure 5 illustrates a cable in which the conductor' I. is surrounded by an insulating hollow and open helix I! provided with a tension resisting thread It, which is held on the conductor by means of a thread I9.
  • , consisting of an individual number of copper bands, may be further provided with a protecting covering against induction 22, consisting of magnetizable 7 material.
  • Thematerial of the threads I! and I9 'must be such as to be capable of resisting tensional stresses; preferably, use is made for this purpose of insulated material having fa small dielectric loss, such as for instance polysty 01.
  • the threads used should be as thin as possible in order to reduce the proportion of the air in the conductor insulation as much as possible,
  • a distance holder between the said two conductors consisting of a self-sustaining hollow and open helix of an insulating material capable of retaining the helical shape the said two conductors lying outside the said helix.
  • a distance holder between the said two conductors consisting of a self-sustaining hollow and open helix of an insulating material capableof retaining the helical shape the said two conductors lying outside the said helix and a thread laid on the inner conductor in opposite direction to the said helix for holding the latter in position on the inner conductor.
  • a distance holder between the said two conductors consisting of a self-sustaining hollow and open helix of polystyrol which is capable of retaining the helical shape the said two conductors lying outside the said helix.

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  • Waveguides (AREA)
  • Communication Cables (AREA)
US50034A 1934-11-15 1935-11-15 Conductor with air space insulation Expired - Lifetime US2116267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2116267X 1934-11-15

Publications (1)

Publication Number Publication Date
US2116267A true US2116267A (en) 1938-05-03

Family

ID=7985688

Family Applications (1)

Application Number Title Priority Date Filing Date
US50034A Expired - Lifetime US2116267A (en) 1934-11-15 1935-11-15 Conductor with air space insulation

Country Status (4)

Country Link
US (1) US2116267A (enrdf_load_stackoverflow)
AT (1) AT148655B (enrdf_load_stackoverflow)
FR (1) FR797290A (enrdf_load_stackoverflow)
NL (1) NL43732C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416979A (en) * 1943-04-27 1947-03-04 Burley Joseph Cilley Electric cable
US2556244A (en) * 1945-09-07 1951-06-12 Int Standard Electric Corp Coaxial cable with helically wound spacer
US2792442A (en) * 1952-07-30 1957-05-14 Telecommunications Sa Multiple channel carrier current telephone cable
US3126438A (en) * 1956-06-08 1964-03-24 Lorrin

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416979A (en) * 1943-04-27 1947-03-04 Burley Joseph Cilley Electric cable
US2556244A (en) * 1945-09-07 1951-06-12 Int Standard Electric Corp Coaxial cable with helically wound spacer
US2792442A (en) * 1952-07-30 1957-05-14 Telecommunications Sa Multiple channel carrier current telephone cable
US3126438A (en) * 1956-06-08 1964-03-24 Lorrin

Also Published As

Publication number Publication date
NL43732C (enrdf_load_stackoverflow)
FR797290A (enrdf_load_stackoverflow)
AT148655B (de) 1937-02-25

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