GB567459A - Improvements in or relating to moving coil electrical instruments - Google Patents
Improvements in or relating to moving coil electrical instrumentsInfo
- Publication number
- GB567459A GB567459A GB2109044A GB2109044A GB567459A GB 567459 A GB567459 A GB 567459A GB 2109044 A GB2109044 A GB 2109044A GB 2109044 A GB2109044 A GB 2109044A GB 567459 A GB567459 A GB 567459A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- ratiometer
- current
- coils
- field
- 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
- G01R27/08—Measuring resistance by measuring both voltage and current
- G01R27/10—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient
- G01R27/12—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient using hand generators, e.g. meggers
Abstract
567,459. Current detectors. SANGAMO WESTON, Ltd., LOVEGROVE, H. J., and McBRIDE, M. G. May 17, 1944, No. 21090. Divided out of 567,435. [Class 37] A ratiometer is provided with means responsive to the current through the ratiometer coils for indicating the presence of such current. A magnet 60 of low remanence is mounted in close proximity to one pole of the magnet 11 of a ratiometer, such as that described in Specification 567,435, and has coils 61 connected in series with the ratiometer coils. A small permanent magnet 66 carrying a pointer 67 is pivoted so as to be in the field of electromagnet 60 and in the leakage field from magnet 11. When the instrument is not energized, the field of magnet 60 is negligible and the magnet 66 sets symmetrically between the poles of magnet 11. When the ratiometer is passing current, coils 61 are energized and magnet 66 is deflected by the overriding field of magnet 60 and the presence of current is indicated by the pointer 67.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2109044A GB567459A (en) | 1944-05-17 | 1944-05-17 | Improvements in or relating to moving coil electrical instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2109044A GB567459A (en) | 1944-05-17 | 1944-05-17 | Improvements in or relating to moving coil electrical instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB567459A true GB567459A (en) | 1945-02-14 |
Family
ID=10157038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2109044A Expired GB567459A (en) | 1944-05-17 | 1944-05-17 | Improvements in or relating to moving coil electrical instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB567459A (en) |
-
1944
- 1944-05-17 GB GB2109044A patent/GB567459A/en not_active Expired
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