GB520976A - Improvements in or relating to thermo-converters for measuring high frequency electric currents - Google Patents

Improvements in or relating to thermo-converters for measuring high frequency electric currents

Info

Publication number
GB520976A
GB520976A GB32139/38A GB3213938A GB520976A GB 520976 A GB520976 A GB 520976A GB 32139/38 A GB32139/38 A GB 32139/38A GB 3213938 A GB3213938 A GB 3213938A GB 520976 A GB520976 A GB 520976A
Authority
GB
United Kingdom
Prior art keywords
resistance
thermo
compensating
heating
blocks
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
Application number
GB32139/38A
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.)
Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Original Assignee
Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
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 Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH filed Critical Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Publication of GB520976A publication Critical patent/GB520976A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

520,976. Current measurements. FIDES GES. FUR DIE VERWALTUNG UND VERWERTUNG VON GEWERBLICHEN SCHUTZRECHTEN. Nov. 5, 1938, No. 32139. Convention date, Nov. 5, 1937. [Class 37] A thermo-converter for measuring highfrequency currents has a compensating resistance connected in parallel with the heating resistance and so dimensioned that the power converted into heat in the heating resistance is independent of frequency, thereby compensating for errors due to skin effect. Two terminal blocks 4, 5 of copper mounted on an insulating base 3 are provided with central terminals 6, 7 for the high-frequency current to be measured. Stretched between the blocks 4, 5 is a heating resistance 1 having connected to its centre a thermo-element 8 to which a D.C. instrument 9 is connected. A compensating resistance 2, of the same material as the heating resistance 1 but of shorter length, is connected between the blocks 4, 5 by means of extension copper conductors 10, 11. In an example, the heating-resistance 1 is of constantan wire 2 cm. long and 0.1mm. diameter and the compensating resistance 2 is a constantan wire 1 cm. long and 0.045 mm. diameter. Alternatively, the resistances 1, 2 may be of the same length but different materials, the extension conductors 10, 11 then being omitted.
GB32139/38A 1937-11-05 1938-11-05 Improvements in or relating to thermo-converters for measuring high frequency electric currents Expired GB520976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE520976X 1937-11-05

Publications (1)

Publication Number Publication Date
GB520976A true GB520976A (en) 1940-05-08

Family

ID=6551214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32139/38A Expired GB520976A (en) 1937-11-05 1938-11-05 Improvements in or relating to thermo-converters for measuring high frequency electric currents

Country Status (1)

Country Link
GB (1) GB520976A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052846A (en) * 1957-11-04 1962-09-04 Nat Res Dev Electrical measuring instruments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052846A (en) * 1957-11-04 1962-09-04 Nat Res Dev Electrical measuring instruments

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