GB656078A - Improvements in electric measuring instruments - Google Patents
Improvements in electric measuring instrumentsInfo
- Publication number
- GB656078A GB656078A GB3368948A GB3368948A GB656078A GB 656078 A GB656078 A GB 656078A GB 3368948 A GB3368948 A GB 3368948A GB 3368948 A GB3368948 A GB 3368948A GB 656078 A GB656078 A GB 656078A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- measuring instruments
- nominal frequency
- electric measuring
- core
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
656,078. Current and voltage measuring. ELLIOTT BROS. (LONDON), Ltd. Dec. 31, 1948, No. 33689. Addition to 616,325. [Class 37] Variations from a nominal frequency are measured by means of two circuits having resonant frequencies above and below the nominal frequency, the outputs being rectified and applied to a ratiometer comprising two coils 1, 2 secured together for rotation about an axis 3; preferably the gaps between the polepieces 4 and the central core 8 widen from 4a to 4b; the core 8 is preferably slotted to facilitate assembly; a third coil 10, Fig. 3, may be wound round the coils 1, 2 for damping purposes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3368948A GB656078A (en) | 1948-12-31 | 1948-12-31 | Improvements in electric measuring instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3368948A GB656078A (en) | 1948-12-31 | 1948-12-31 | Improvements in electric measuring instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB656078A true GB656078A (en) | 1951-08-08 |
Family
ID=10356171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3368948A Expired GB656078A (en) | 1948-12-31 | 1948-12-31 | Improvements in electric measuring instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB656078A (en) |
-
1948
- 1948-12-31 GB GB3368948A patent/GB656078A/en not_active Expired
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