GB431992A - Improvements in and relating to electric control circuits - Google Patents
Improvements in and relating to electric control circuitsInfo
- Publication number
- GB431992A GB431992A GB33051/34A GB3305134A GB431992A GB 431992 A GB431992 A GB 431992A GB 33051/34 A GB33051/34 A GB 33051/34A GB 3305134 A GB3305134 A GB 3305134A GB 431992 A GB431992 A GB 431992A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- transformer
- conductive
- rendered conductive
- valves
- 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
Abstract
431,992. Control systems for consuming devices. BRITISH THOMSONHOUSTON CO., Ltd., Crown House, Aldwych, London. Nov. 16, 1934, No. 33051. Convention date, Nov. 16, 1933. [Class 38 (iv)] In arrangements in which a pair of gridcontrolled valves are used for controlling A.C. in a load circuit, a control potential from an external source is applied to the grid of only one of the valves, the other being normally maintained non-conductive and rendered conductive in response to current flow in the first valve. Fig. 1 shows an arrangement in which A.C. in a load circuit 11 coupled through a transformer 15 to an A.C. supply 10 is controlled by a pair of reversely connected valves 12, 13. When the valve 12 is rendered conductive by its control circuit 17, the valve 13 which is normally blocked by a bias battery 20 is also rendered conductive by impulses generated in a tertiary winding 19 on the transformer 15. In a modification, Fig. 2, the transformer 15 is dispensed with and the impulses necessary to overcome the effect of the bias battery 20 and render the valve 13 conductive when the valve 12 is rendered conductive by its external control circuit 17 are derived from a current transformer 22 in the load circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US431992XA | 1933-11-16 | 1933-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB431992A true GB431992A (en) | 1935-07-18 |
Family
ID=21925989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33051/34A Expired GB431992A (en) | 1933-11-16 | 1934-11-16 | Improvements in and relating to electric control circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB431992A (en) |
-
1934
- 1934-11-16 GB GB33051/34A patent/GB431992A/en not_active Expired
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