US1741644A - Electric conductor for signaling purposes - Google Patents

Electric conductor for signaling purposes Download PDF

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Publication number
US1741644A
US1741644A US113922A US11392226A US1741644A US 1741644 A US1741644 A US 1741644A US 113922 A US113922 A US 113922A US 11392226 A US11392226 A US 11392226A US 1741644 A US1741644 A US 1741644A
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US
United States
Prior art keywords
resistance
permeability
conductor
thickness
layer
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
US113922A
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English (en)
Inventor
Meyer Ulfilas
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.)
Felton & Guilleaume Carlswerk
Felton & Guilleaume Carlswerk Actien-Gesellschaft
Original Assignee
Felton & Guilleaume Carlswerk
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.)
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Publication date
Application filed by Felton & Guilleaume Carlswerk filed Critical Felton & Guilleaume Carlswerk
Application granted granted Critical
Publication of US1741644A publication Critical patent/US1741644A/en
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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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/12—Arrangements for exhibiting specific transmission characteristics
    • H01B11/14—Continuously inductively loaded cables, e.g. Krarup cables

Definitions

  • Fig. 1 is a diagram showing the damping as a function of the thickness of the layer of magnetic material and of the permeability, whilst Figures 2.
  • the present invention takes into consideration all essential factors and indicates for any shape of the magnetic layer the dimensions of the magnetic material corresponding to the minimum total damping for a definite permeability.
  • the arrangementsv differ from each other by the thickness d 0f ⁇ their layers, d being understood to represent any dimension taken perp-:ndicularly to the outer surface ofthe conductor, for instance in the case of multiple tape windings (with or without intermediate air spacings) the diameteror any other dimension increasing proportionately therewith.
  • R 0 wtg 2 L 2v LU A holds for the damping of conductors under certain conditions existing in this'case, R being the total resistance, C the capacity, L the self-indutance (all per unit length) and a2/g8 the Well-known expression for' the leakance, i. e. the product of the angular frequency w and the tangent of the phase angle devi'ation 8 from 90, which is the phase angle for a perfect dielectricum.
  • W ith Krarup conductors the total resistance R is equal to the sum of the resistance of the copper B0, the eddy current resistance p1, and the hysterises resistance p2.
  • a conductor for signaling purposes having layers of ferro-magnetic material Wound round it for the purpose of increasing the self-inductance, the said ferro-magnetic material having an initial permeability greater than200, the thickness of the said layers being such that with the frequencies and current strengths which are employed for the said signaling purposes, the sum of iive times the eddy current resistance of the said layers plus the hysteresis resistance and plus the product of the angular frequency, the self-inductance and the tangent of the phasevangle deviation from 90 in the insulating material is approximately equal to the continuous current resistance of the said conductor.
  • a conductor for telephone communication having layers of ferro-magnetic'material Wound round it for the purpose of increasing the self-inductance, the said ferromagnetic material having an initial permeability greater than 200, the thickness of the said layers being such that, with the current strengths which are employed for the said communication and with an angular frequency of 7000, the virtual 'resistance is ⁇ approximately equal to one ifth of the continuous current resistance of the said conductor.
  • a conductor for signaling purposes having layers of ferro-magnetic material Wound round it for the purpose of increasing the self-inductance, the said ferro-magnetic material having an initial permeability greater than 200, the thickness of each individual layer of the ferro-magnetic material in mm. being for currents with an angular frequency of 7000 approximately equal to L aw/lf In testimony whereof I have signed my name to this specification.

Landscapes

  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
  • Coils Or Transformers For Communication (AREA)
US113922A 1925-07-09 1926-06-05 Electric conductor for signaling purposes Expired - Lifetime US1741644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE255025X 1925-07-09

Publications (1)

Publication Number Publication Date
US1741644A true US1741644A (en) 1929-12-31

Family

ID=5961275

Family Applications (1)

Application Number Title Priority Date Filing Date
US113922A Expired - Lifetime US1741644A (en) 1925-07-09 1926-06-05 Electric conductor for signaling purposes

Country Status (4)

Country Link
US (1) US1741644A (enrdf_load_stackoverflow)
BE (1) BE334358A (enrdf_load_stackoverflow)
FR (1) FR618690A (enrdf_load_stackoverflow)
GB (1) GB255025A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1208034B (de) * 1962-05-05 1965-12-30 Adam Schneider G M B H Zahnaerztlicher Patientenstuhl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1208034B (de) * 1962-05-05 1965-12-30 Adam Schneider G M B H Zahnaerztlicher Patientenstuhl

Also Published As

Publication number Publication date
FR618690A (fr) 1927-03-15
BE334358A (enrdf_load_stackoverflow)
GB255025A (en) 1927-05-19

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