GB542107A - Improvements in electric timing circuits - Google Patents
Improvements in electric timing circuitsInfo
- Publication number
- GB542107A GB542107A GB1604740A GB1604740A GB542107A GB 542107 A GB542107 A GB 542107A GB 1604740 A GB1604740 A GB 1604740A GB 1604740 A GB1604740 A GB 1604740A GB 542107 A GB542107 A GB 542107A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- welding
- grid
- discharge
- charging
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
- H03K17/288—Modifications for introducing a time delay before switching in tube switches
Landscapes
- Generation Of Surge Voltage And Current (AREA)
Abstract
542,107. Switching systems for electric welding. BRITISH THOMSON-HOUSTON CO., Ltd., and HIGGINS, B. G. Nov. 4, 1940, No. 16047. Addition to 463,561. [Class 38 (iv)] The period of application of supply to an electric weld is determined, automatically, by the rate of discharge of the condenser 10 which is normally on charge from the secondary 7 through the rectifier 11, is disconnected therefrom when the switches 18, 19 are moved over by manuallycontrolled energization of their operating coil 16, and thus connected to the grid of the discharge device 2 the anode current of which is adapted to energize the coil 3 and close the welding supply contact. The condenser makes the grid positive and the valve 2 conductive with consequent closure of the contactor; the slow discharge of the condenser allows the negative bias on the grid to re-establish control after a time and thus render the valve non-conductive again and break the energizing circuits of the welding contactor. As the charging of the condenser takes place when there is no welding load on the system, this charging is unaffected by variations of voltage and accurate timing is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1604740A GB542107A (en) | 1940-11-04 | 1940-11-04 | Improvements in electric timing circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1604740A GB542107A (en) | 1940-11-04 | 1940-11-04 | Improvements in electric timing circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB542107A true GB542107A (en) | 1941-12-24 |
Family
ID=10070169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1604740A Expired GB542107A (en) | 1940-11-04 | 1940-11-04 | Improvements in electric timing circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB542107A (en) |
-
1940
- 1940-11-04 GB GB1604740A patent/GB542107A/en not_active Expired
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