GB636048A - Improvements in electrical measuring methods and apparatus - Google Patents
Improvements in electrical measuring methods and apparatusInfo
- 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
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.
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)
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 |
-
1947
- 1947-06-04 GB GB1478647A patent/GB636048A/en not_active Expired
Cited By (3)
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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