GB635715A - Improvements in or relating to voltmeters incorporating dry-plate rectifying devices - Google Patents
Improvements in or relating to voltmeters incorporating dry-plate rectifying devicesInfo
- Publication number
- GB635715A GB635715A GB1038447A GB1038447A GB635715A GB 635715 A GB635715 A GB 635715A GB 1038447 A GB1038447 A GB 1038447A GB 1038447 A GB1038447 A GB 1038447A GB 635715 A GB635715 A GB 635715A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- rectifier
- condenser
- instrument
- voltmeters
- 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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/22—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of ac into dc
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
635,715. Voltmeters. GENERAL ELECTRIC CO., Ltd., and REIK, H. April 18, 1947, No. 10384. [Class 37] In an A.C. voltmeter having a resistance R2 in series with a rectifier 1 and a moving coil instrument 8, the resistance R2 is shunted by a condenser C2, the value of which is such that for one particular value of voltage there is substantially no error in the reading of the voltmeter caused by the -variation in reactance with frequency of the portion of the self capacity of the rectifier 1 which shunts the instrument 8. The value of the condenser C2 is such that with a known resistance for the rectifier 1 at a chosen fraction of full scale deflection the product of the self-capacitance of the rectifier 1 and the sum of this known resistance and the resistance of the instrument 8 is substantially equal to the product of the capacitance of the condenser C2 and the resistance R2. A number of resistances R2, each shunted by its appropriate condenser C2, may be arranged so that they may be selectively connected to provide a number of different voltage ranges. The rectifier 1 consists of four dry-plate rectifying elements connected in a full wave bridge rectifier network. One diagonal 2, 3 is connected in series with the resistance R2 to a pair of terminals 6, 7 to which the alternating voltage to be measured is applied, the moving coil instrument 8 being connected across the other diagonal 4, 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1038447A GB635715A (en) | 1947-04-18 | 1947-04-18 | Improvements in or relating to voltmeters incorporating dry-plate rectifying devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1038447A GB635715A (en) | 1947-04-18 | 1947-04-18 | Improvements in or relating to voltmeters incorporating dry-plate rectifying devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB635715A true GB635715A (en) | 1950-04-12 |
Family
ID=9966849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1038447A Expired GB635715A (en) | 1947-04-18 | 1947-04-18 | Improvements in or relating to voltmeters incorporating dry-plate rectifying devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB635715A (en) |
-
1947
- 1947-04-18 GB GB1038447A patent/GB635715A/en not_active Expired
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