US2216419A - Air-space insulated electric cable - Google Patents

Air-space insulated electric cable Download PDF

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Publication number
US2216419A
US2216419A US175936A US17593637A US2216419A US 2216419 A US2216419 A US 2216419A US 175936 A US175936 A US 175936A US 17593637 A US17593637 A US 17593637A US 2216419 A US2216419 A US 2216419A
Authority
US
United States
Prior art keywords
tape
recesses
thread
air
electric cable
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
US175936A
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English (en)
Inventor
Nehmiz Gerhard
Budie Erich
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.)
NORDDEUTSCHE KABELWERKE AG
Original Assignee
NORDDEUTSCHE KABELWERKE 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 NORDDEUTSCHE KABELWERKE AG filed Critical NORDDEUTSCHE KABELWERKE AG
Application granted granted Critical
Publication of US2216419A publication Critical patent/US2216419A/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
    • 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

Definitions

  • This invention relates to an air-space insulated electric cable, more particularly a high-frequency cable.
  • the invention comprises an air-space insulated electric cable in which the helically wound tape constituting the outer conductor or covering is furnished with marginal recesses, which are disposed at an angle to the longitudinal direction of the tape and are adapted to receive the thread or threads supporting the central conductor.
  • the supporting thread is wound with a pitch which is shorter than that of the tape, thepoints of support of the central conductor then being disposed in close proximity to one another and the supporting thread being almost vertical to the central conductor. This disposal is particularly favourable, both from the electrical as well as the mechanical point of view.
  • one supporting thread there may also be employed a plurality of threads, which are either situated close together or are so distributed over the width of the helical tape winding that they are located at approximately equal distances apart. In the latter case there is obtained the most uniform radial support of the central conductor.
  • the suppor ng thread can also be separately secured on the helical tape winding, as the thread is disposed along the tape winding.
  • the supporting thread when wound about the tape 5 will always find a suitable supporting point.
  • the tape possesses a U-shaped cross-section.
  • the flanges or limbs of the U are furnished with recesses adapted to receive the supportingthread.
  • the supporting thread can be secured by a separate tape which, resting between the flanges of the U, is wound over the tape having the recesses.
  • the marginal recesses can also be formed by 15 providing the tape with a sectional form disposed at an angle to the longitudinal axis of the tape corresponding to the pitch of the supporting thread. It is also possible to provide merely the marginal zone of the tape with a shaped sec-' 20 tional form.
  • the helically wound tape may consist of metal or also of a synthetic or other nonmetallic material.
  • the provision of a shaped sectional form has the advantage that the tape then 2 possesses a greater mechanical strength as compared with a flat tape.
  • Fig. 1 shows a section of electric cable according to the invention.
  • Fig. 2 shows a modified embodiment of the cable.
  • Fig. 3 shows a piece of the tape having the marginal recesses employed for the outer con ductor or covering.
  • Fig. 4 is a plan view of a piece of tape having a 'U-shaped cross-section.
  • Fig. 5 is a cross-section taken along the line V--V in Fig. 4.
  • Fig. (i is a plan view of one form of shaped w sectional tape.
  • Fig. 7 is a cross-section of the tape according to Fig. 6.
  • Fig. 8 shows an additional embodiment o shaped sectional tape.
  • Fig. 9 is a cross-section of the tape according to Fig. 8.
  • l is the central conductor, which is supported within the outer covering or conductor by threads 2.
  • This outer covering comprises a helically wound tape 3 having recesses l.
  • the supporting thread for the central conductor is introduced into the recesses 4, as clearly shown by the drawings.
  • the cable likewise comprises the central conductor I, the helically wound tape 3 having the recesses 4, and the supporting thread 2.
  • the supporting thread 2 possesses, as compared with the embodiment in Fig. 1, a shorter pitch than the outer covering 3.
  • the supporting thread 2 is introduced into the recesses l in the tape 3, but it will be clearly seen from Fig. 2 that in this case the points at which the central conductor 1 is supported are disposed a comparatively short distance apart.
  • Fig. 2 also shows that the supporting thread is practically vertical in its approach towards the central conductor, having the advantages referred to in the above.
  • Fig. 3 shows the provision of the recesses I at the edges of a flat tape 3.
  • the tape possesses a U-shaped cross-section, and the recesses 4 are provided in the flanges 5.
  • the supporting thread can be secured by a separate tape 6 which, as shown in Fig. 5, is wound into the trough of the U-shaped tape, so that the thread 2 passes between the tape 6 and the web of the tape 3 and is held and maintained in a taut condition by the tape 6.
  • Figs. 6 and 7 show a sectional tape, in which the profile runs obliquely, i. e-., at an angle to the longitudinal direction of the tape corresponding to the pitch of the supporting thread.
  • This embodiment clearly shows that there may also be used a plurality of supporting threads.
  • the embodiments-according to Figs. 6 to 9 have the advantage that the supporting thread is securely guided over those portions of its length where it contacts with the helically wound tape. Owing to the obliquely disposed profile there are produced at the same time the recesses adapted to receive the thread.
  • a central conductor a central conductor, an outer covering comprising a helically wound tape having recesses disposed at least along both longitudinal edges of the tape, and at least one supporting thread alternately passing about the central conductor and over the said tape and lying in said recesses, the said recesses being so disposed that the pitch of the said thread when supported in the said recesses is smaller than the pitch of the helically wound tape.
  • a central conductor an outer covering comprising a helically wound tape 01' fiat form having recesses extending into the plane of the tape along both longitudinal edges thereof, and at least one supporting thread alternately passing about the central conductor and over the said tape and lying in said recesses, the said recesses being so disposed that the pitch of the said thread when supported in the said recesses is smaller than the pitch of the helically wound tape.
  • a central conductor comprising a helically wound tape of shaped sectional form having recesses sunk into the thickness of the tape and extending obliquely from the one longitudinal edge of the tape to the other, and at least one supporting thread alternately passing about the central conductor and over the said tape and lying in said recesses, the said recesses being so disposed that the pitch of the said thread when supported in the said recesses is smaller than the pitch of the helically wound tape.
  • a central conductor comprising a helically wound tape of shaped sectional form having recesses sunk into the thickness of the tape in zones extending along the two longitudinal edges thereof and disposed obliquely to the longitudinal direction of the tape, and at least one supporting thread alternately passing about the central conductor and over the said tape and lying in said recesses, the said recesses being so disposed that the pitch of the said thread when supported in the said recesses is smaller than the pitch of the helically wound tape.

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  • Insulated Conductors (AREA)
US175936A 1936-12-03 1937-11-22 Air-space insulated electric cable Expired - Lifetime US2216419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2216419X 1936-12-03

Publications (1)

Publication Number Publication Date
US2216419A true US2216419A (en) 1940-10-01

Family

ID=7990588

Family Applications (1)

Application Number Title Priority Date Filing Date
US175936A Expired - Lifetime US2216419A (en) 1936-12-03 1937-11-22 Air-space insulated electric cable

Country Status (2)

Country Link
US (1) US2216419A (sl)
BE (1) BE421629A (sl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070217196A1 (en) * 2006-03-17 2007-09-20 Shaner Jeff R Vented lighting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070217196A1 (en) * 2006-03-17 2007-09-20 Shaner Jeff R Vented lighting system

Also Published As

Publication number Publication date
BE421629A (sl)

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