GB612929A - Improvements in or relating to electric phase-meters - Google Patents
Improvements in or relating to electric phase-metersInfo
- Publication number
- GB612929A GB612929A GB17291/46A GB1729146A GB612929A GB 612929 A GB612929 A GB 612929A GB 17291/46 A GB17291/46 A GB 17291/46A GB 1729146 A GB1729146 A GB 1729146A GB 612929 A GB612929 A GB 612929A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- pulses
- condenser
- phase
- value
- 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
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ac-Ac Conversion (AREA)
Abstract
612,929. Converting. PHILIPS LAMPS, Ltd. June 6, 1946, No. 17291. Convention date, Sept. 22, 1945. [Class 38 (ii)] [Also in Group XXXVI] A phase-meter in which the polarity and value of the output voltage vary with the phase difference between an A.C. voltage and voltage pulses of the same or a sub-multiple frequency, . comprises two thermionic valves 4, 5 connected in anti-parallel relationship in series with a parallel combination of resistance 2 and condenser 1 from which the output voltage is taken, the series arrangement being supplied from a transformer 3 to which the A.C. voltage is applied, the voltage pulses being applied to the grids of valves 4, 5. The time constant of the circuit is made so small that the condenser voltage attains at once the instantaneous value of the A.C. voltage, and the time constant of the condenser 1, resistance 2 parallel arrangement is made so large that the condenser volts remain constant during the intervals between the pulses. Fig. 2 shows the condenser voltage 10 the same as that value of the A.C. voltage at the instants pulses 9 render valve 4 conductive, and how the condenser voltage 101 is reversed in sign when the phase of the pulses 9<SP>1</SP> is such that they make valve 5 conductive. The Specification as open to inspection under Sect. 91 comprises also a wave shape-changing circuit in which the frequency of the pulses is greater than that of the input A.C. voltage and the output voltage is A.C. with a stepped wave-form, Fig. 2 (Cancelled). Frequency changing is also mentioned. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL612929X | 1945-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB612929A true GB612929A (en) | 1948-11-19 |
Family
ID=19788166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17291/46A Expired GB612929A (en) | 1945-09-22 | 1946-06-06 | Improvements in or relating to electric phase-meters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB612929A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1099010B (en) * | 1955-08-23 | 1961-02-09 | Int Standard Electric Corp | Circuit arrangement for phase comparison of a pulse-shaped and a sinusoidal voltage when determining the azimuth in radio direction finder systems |
-
1946
- 1946-06-06 GB GB17291/46A patent/GB612929A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1099010B (en) * | 1955-08-23 | 1961-02-09 | Int Standard Electric Corp | Circuit arrangement for phase comparison of a pulse-shaped and a sinusoidal voltage when determining the azimuth in radio direction finder systems |
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