GB622257A - Improvements relating to instruments for measuring electrical resistance - Google Patents

Improvements relating to instruments for measuring electrical resistance

Info

Publication number
GB622257A
GB622257A GB3479746A GB3479746A GB622257A GB 622257 A GB622257 A GB 622257A GB 3479746 A GB3479746 A GB 3479746A GB 3479746 A GB3479746 A GB 3479746A GB 622257 A GB622257 A GB 622257A
Authority
GB
United Kingdom
Prior art keywords
resistance
output
alternator
instruments
electrical resistance
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
GB3479746A
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.)
Evershed and Vignoles Ltd
Original Assignee
Evershed and Vignoles Ltd
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 Evershed and Vignoles Ltd filed Critical Evershed and Vignoles Ltd
Priority to GB3479746A priority Critical patent/GB622257A/en
Publication of GB622257A publication Critical patent/GB622257A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Eletrric Generators (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

622,257. Resistance measurements. EVERSHED & VIGNOLES, Ltd., and ROLFE, G. B. Nov. 23, 1946, No. 34797. [Class 37] [Also in Group XXXV] The maximum output voltage of a handdriven alternator used with insulation resistance measuring instruments is maintained substantially independent of the driving speed by connecting in its output circuit a resistance which decreases in value with increase in applied volts. The alternator consists of a permanent magnet rotor m, driven through gearing a by a crank handle b. The output from the armature of a fixed resistance g in series with a variable resistance of the type described comprising a disc e of silicon carbide mounted between two electrodes f. The output of the alternator is rectified by half or full-wave rectification, either before or after the compensating circuit, and the uni-directional voltage is fed to the measuring part of the instrument.
GB3479746A 1946-11-23 1946-11-23 Improvements relating to instruments for measuring electrical resistance Expired GB622257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3479746A GB622257A (en) 1946-11-23 1946-11-23 Improvements relating to instruments for measuring electrical resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3479746A GB622257A (en) 1946-11-23 1946-11-23 Improvements relating to instruments for measuring electrical resistance

Publications (1)

Publication Number Publication Date
GB622257A true GB622257A (en) 1949-04-28

Family

ID=10370051

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3479746A Expired GB622257A (en) 1946-11-23 1946-11-23 Improvements relating to instruments for measuring electrical resistance

Country Status (1)

Country Link
GB (1) GB622257A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855741C (en) * 1949-02-18 1952-11-20 Metrawatt Ag Grounding knife
CN106970325A (en) * 2017-05-15 2017-07-21 中国大唐集团科学技术研究院有限公司华东分公司 The generator manually wound insulation reversal connection ray detection device and method measured in high potential

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855741C (en) * 1949-02-18 1952-11-20 Metrawatt Ag Grounding knife
CN106970325A (en) * 2017-05-15 2017-07-21 中国大唐集团科学技术研究院有限公司华东分公司 The generator manually wound insulation reversal connection ray detection device and method measured in high potential
CN106970325B (en) * 2017-05-15 2024-04-02 中国大唐集团科学技术研究院有限公司华东分公司 Generator handbag insulation reverse wiring inspection device and method for high potential measurement

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