GB669637A - Improvements in electric valve circuits for controlling the supply of alternating current to a load circuit - Google Patents
Improvements in electric valve circuits for controlling the supply of alternating current to a load circuitInfo
- Publication number
- GB669637A GB669637A GB1824948A GB1824948A GB669637A GB 669637 A GB669637 A GB 669637A GB 1824948 A GB1824948 A GB 1824948A GB 1824948 A GB1824948 A GB 1824948A GB 669637 A GB669637 A GB 669637A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- alternating current
- load circuit
- controlling
- supply
- 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
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
- G05F1/42—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices discharge tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Cookers (AREA)
Abstract
669,637. Valve control systems for alternating current loads. SOLOMON, J. L. July 7, 1948, No. 18249/48. Class 38 (iv). An alternating hold-off bias voltage 47 on the trailing valve 24 of a pair 23, 24 transmitting alternating current from a source L1, L2 to a load, such as a resistance welding transformer 14, is, upon conduction of the leading valve 23, overcome by a " turn-on " voltage developed across a resistance-condenser combination 17, 18 in series with the valves, so that valve 24 conducts during the half-cycle following conduction of valve 23. Resistor 17 may be adjustable to control the power factor of the load circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1824948A GB669637A (en) | 1948-07-07 | 1948-07-07 | Improvements in electric valve circuits for controlling the supply of alternating current to a load circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1824948A GB669637A (en) | 1948-07-07 | 1948-07-07 | Improvements in electric valve circuits for controlling the supply of alternating current to a load circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB669637A true GB669637A (en) | 1952-04-09 |
Family
ID=10109220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1824948A Expired GB669637A (en) | 1948-07-07 | 1948-07-07 | Improvements in electric valve circuits for controlling the supply of alternating current to a load circuit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB669637A (en) |
-
1948
- 1948-07-07 GB GB1824948A patent/GB669637A/en not_active Expired
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