GB267397A - Improvements in or appertaining to impedance measuring bridges - Google Patents

Improvements in or appertaining to impedance measuring bridges

Info

Publication number
GB267397A
GB267397A GB2032026A GB2032026A GB267397A GB 267397 A GB267397 A GB 267397A GB 2032026 A GB2032026 A GB 2032026A GB 2032026 A GB2032026 A GB 2032026A GB 267397 A GB267397 A GB 267397A
Authority
GB
United Kingdom
Prior art keywords
shield
arms
shields
bridge
points
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
GB2032026A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB2032026A priority Critical patent/GB267397A/en
Publication of GB267397A publication Critical patent/GB267397A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

267,397. Standard Telephones & Cables, Ltd., (Western Electric Co., Inc.). Aug. 17, 1926. Inductances and capacities, measuring. - In a wheatstone bridge for measuring impedances, in which the arms are electrostatically shielded, shielded switching means are provided for interchanging the ratio arms in order to check their exact equality and also for interchanging the impedance arms in order to check the equality of the admittances in shunt therewith. The ratio arms R<1>, R<2> are provided with individual shields 9. 10 connected to the junction point A of the arms. The shields 9, 10 are surrounded by a common shield 11 which also shields the lead from the terminal A to the current supply transformer 5 and is connected to the shield 12 surrounding it. The capacities between the shields 9, 10 and the shield 11 are thus connected between the points A, C of the bridge, so that they do not affect the balance. The primary winding 7 of the detector transformer is connected across the bridge terminals B, D and is connected at one end to its shield 13, which forms the bridge terminal D. The standard impedance, connected between the points C, ZS, is provided with a shield connected to the point C. A variable condenser Cb is connected between the points B, C, and is adjusted to equality with the ground capacity between the points C. D. The whole bridge is surrounded by a grounded shield 30 which is connected to the junction point C through a variable condenser Cg. Switches 14, 15, for interchanging the ratio arms and impedance arms respectively. are provided and are enclosed in a shield 16 connected to the oscillator transformer shield 13. An adjustable sleeve 26 is provided for securing equality in the capacities between the shields 9, 10 and the shield 16.
GB2032026A 1926-08-17 1926-08-17 Improvements in or appertaining to impedance measuring bridges Expired GB267397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2032026A GB267397A (en) 1926-08-17 1926-08-17 Improvements in or appertaining to impedance measuring bridges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2032026A GB267397A (en) 1926-08-17 1926-08-17 Improvements in or appertaining to impedance measuring bridges

Publications (1)

Publication Number Publication Date
GB267397A true GB267397A (en) 1927-03-17

Family

ID=10144014

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2032026A Expired GB267397A (en) 1926-08-17 1926-08-17 Improvements in or appertaining to impedance measuring bridges

Country Status (1)

Country Link
GB (1) GB267397A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168495A (en) * 1984-12-15 1986-06-18 Licentia Gmbh Compensation for parasitic capacitances in a screened resistance device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168495A (en) * 1984-12-15 1986-06-18 Licentia Gmbh Compensation for parasitic capacitances in a screened resistance device

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