GB636048A - Improvements in electrical measuring methods and apparatus - Google Patents

Improvements in electrical measuring methods and apparatus

Info

Publication number
GB636048A
GB636048A GB1478647A GB1478647A GB636048A GB 636048 A GB636048 A GB 636048A GB 1478647 A GB1478647 A GB 1478647A GB 1478647 A GB1478647 A GB 1478647A GB 636048 A GB636048 A GB 636048A
Authority
GB
United Kingdom
Prior art keywords
resistance
low resistance
unknown
leads
measuring methods
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
GB1478647A
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.)
EDWARD ALBERT JAMES TUNNICLIFF
ELECTRONIC AND X RAY APPLIC LT
Original Assignee
EDWARD ALBERT JAMES TUNNICLIFF
ELECTRONIC AND X RAY APPLIC LT
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 EDWARD ALBERT JAMES TUNNICLIFF, ELECTRONIC AND X RAY APPLIC LT filed Critical EDWARD ALBERT JAMES TUNNICLIFF
Priority to GB1478647A priority Critical patent/GB636048A/en
Publication of GB636048A publication Critical patent/GB636048A/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
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18—Measuring resistance to earth, i.e. line to ground

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

636,048. Resistance measurements. ELECTRONIC & X-RAY APPLICATIONS, Ltd., TUNNICLIFFE, E. A. J., and WILKINS, S. R. June 4, 1947, No. 14786. [Class 37] A low resistance source B, Fig. 1, supplies current to a low resistance R across which is a voltmeter connected by low resistance leads L<1>, L<11>, and the unknown low resistance is connected to leads El, E<11> to vary the meter reading and thus indicate its value. Preferably LR is about half the unknown resistance. As shown in Fig. 2, the arrangement is modified for measurements over two ranges, switch SW connecting either LR<1> or LR<11>across the meter mv. The terminals E<1>, E<11> for connecting to the unknown resistance include a contact strip 11, Fig. 3a, and one has a contact 8, 9 actuated by a button 4 for completing the circuit of the resistance LR<1> or LR<11> and the battery B.
GB1478647A 1947-06-04 1947-06-04 Improvements in electrical measuring methods and apparatus Expired GB636048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1478647A GB636048A (en) 1947-06-04 1947-06-04 Improvements in electrical measuring methods and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1478647A GB636048A (en) 1947-06-04 1947-06-04 Improvements in electrical measuring methods and apparatus

Publications (1)

Publication Number Publication Date
GB636048A true GB636048A (en) 1950-04-19

Family

ID=10047463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1478647A Expired GB636048A (en) 1947-06-04 1947-06-04 Improvements in electrical measuring methods and apparatus

Country Status (1)

Country Link
GB (1) GB636048A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103458B (en) * 1958-08-18 1961-03-30 Hewlett Packard Co Directly displaying ohmmeter with switchable measuring ranges
DE1114585B (en) * 1958-12-19 1961-10-05 Optische Anstalt C P Goerz Ges Probe for a multi-purpose electrical measuring instrument
DE1254242B (en) * 1960-05-27 1967-11-16 Dr Phil Habil Oskar Vierling Resistance measuring bridge circuit based on the deflection method for measuring resistors smaller than approx

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103458B (en) * 1958-08-18 1961-03-30 Hewlett Packard Co Directly displaying ohmmeter with switchable measuring ranges
DE1114585B (en) * 1958-12-19 1961-10-05 Optische Anstalt C P Goerz Ges Probe for a multi-purpose electrical measuring instrument
DE1254242B (en) * 1960-05-27 1967-11-16 Dr Phil Habil Oskar Vierling Resistance measuring bridge circuit based on the deflection method for measuring resistors smaller than approx

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