GB546845A - Improvements in and relating to electric valve control systems - Google Patents
Improvements in and relating to electric valve control systemsInfo
- Publication number
- GB546845A GB546845A GB8086/41A GB808641A GB546845A GB 546845 A GB546845 A GB 546845A GB 8086/41 A GB8086/41 A GB 8086/41A GB 808641 A GB808641 A GB 808641A GB 546845 A GB546845 A GB 546845A
- Authority
- GB
- United Kingdom
- Prior art keywords
- excitation circuits
- june
- valves
- control systems
- excitation
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/248—Electric supplies using discharge tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
546,845. Control systems for resistance welding &c. BRITISH THOMSON-HOUSTON CO., Ltd. June 27, 1941, No. 8086. Convention date, June 29, 1940. [Class 38 (iv)] Thermionic control.-Reversely connected immersion-igniter valves 5, 6, in which the excitation circuits each contain a unidirectional conducting device 14, 15, have a pair of reversely connected grid controlled discharge devices 21, 22 connected back to back in the common portion of the excitation circuits and adapted by phase control of their grid voltages to advance and retard the time of ignition of the valves 5, 6. The excitation circuits may also contain timing means 35 to determine a sequence of welding current impulses for example and a relay contact delaying closure of the excitation circuit until the cathodes of the discharge devices 21, 22 have become heated. Adjustable resistances and a condenser 41 constitute a network whereby any desired phase position may be given to the grid voltages of the devices 21, 22 and a manual switch 47 may provide means for selectively applying voltages in either of two phase relationships.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US546845XA | 1940-06-29 | 1940-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB546845A true GB546845A (en) | 1942-07-31 |
Family
ID=21992817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8086/41A Expired GB546845A (en) | 1940-06-29 | 1941-06-27 | Improvements in and relating to electric valve control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB546845A (en) |
-
1941
- 1941-06-27 GB GB8086/41A patent/GB546845A/en not_active Expired
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