GB646692A - Improvements relating to voltmeters - Google Patents
Improvements relating to voltmetersInfo
- Publication number
- GB646692A GB646692A GB2804748A GB2804748A GB646692A GB 646692 A GB646692 A GB 646692A GB 2804748 A GB2804748 A GB 2804748A GB 2804748 A GB2804748 A GB 2804748A GB 646692 A GB646692 A GB 646692A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- potential
- charged
- point
- 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
- G01R19/0023—Measuring currents or voltages from sources with high internal resistance by means of measuring circuits with high input impedance, e.g. OP-amplifiers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
646,692. Current and voltage measuring. TRIST & CO., Ltd., R., and CLARKE, A. G. Oct. 28, 1948, No. 28047. [Class 37] The voltage to be measured is applied at A, B, to vary the potential of the grid 1 of a cold cathode tube 3 relative to the cathode 2, so that when key 7 is closed, condenser 5 is charged to a point where the tube 3 discharges, this point being related to the potential between A and B ; condenser 5 is thus charged and discharged continuously, the condenser 11 thus being charged periodically to a value dependent on the maximum charge developed by condenser 5; the discharge through resistance 10 and meter 9 is thus a measure of the potential at AB.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2804748A GB646692A (en) | 1948-10-28 | 1948-10-28 | Improvements relating to voltmeters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2804748A GB646692A (en) | 1948-10-28 | 1948-10-28 | Improvements relating to voltmeters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB646692A true GB646692A (en) | 1950-11-29 |
Family
ID=10269399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2804748A Expired GB646692A (en) | 1948-10-28 | 1948-10-28 | Improvements relating to voltmeters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB646692A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183439A (en) * | 1960-08-23 | 1965-05-11 | Rosinek Isidore | Portable high voltage test stick |
-
1948
- 1948-10-28 GB GB2804748A patent/GB646692A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183439A (en) * | 1960-08-23 | 1965-05-11 | Rosinek Isidore | Portable high voltage test stick |
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