GB705164A - Improvements relating to arc welding equipment - Google Patents
Improvements relating to arc welding equipmentInfo
- Publication number
- GB705164A GB705164A GB2003250A GB2003250A GB705164A GB 705164 A GB705164 A GB 705164A GB 2003250 A GB2003250 A GB 2003250A GB 2003250 A GB2003250 A GB 2003250A GB 705164 A GB705164 A GB 705164A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc
- condenser
- voltage
- transformer
- maintain
- 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
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
- B23K9/0738—Stabilising of the arc by automatic re-ignition means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
705,164. Supply systems for welding arcs. BRITISH ELECTRICAL & ALLIED INDUSTRIES RESEARCH ASSOCIATION. Aug. 10, 1951 [Aug. 11, 1950; May. 3, 1951], Nos. 20032/50 and 10437/51. Class 38 (4) To improve the stability of an A.C. welding arc whilst allowing a reduction of open circuit voltage of the main current source, a switching device is effective, immediately the arc commences to extinguish, to connect to the arc an auxiliary low power source which then supplies the arc gap with voltage impulses to maintain ionization. The switching device may be responsive to voltage rise of the arc, to a marked increase of its resistance, or to the occurrence of zero current. In the arrangement shown in Fig. 1 a value amplifier 10, responsive to the voltage across an arc 1, 2 supplied from a main source WT, triggers a cold cathode thyratron 6 if the arc voltage rises and causes a condenser 3 to discharge into the arc and thus maintain it. The condenser is continuously charged over a resistor 5 from a battery 4 of, say, 450 volts. In modified arrangements the condenser may discharge in series with the main source, or the amplifier 10 may be dispensed with. Several other arrangements are described in which the condenser is coupled to the arc circuit by a transformer either for the purpose of matching the impedances of the two circuits, or for obtaining a high impulse voltage sufficient for the initial striking of the main arc. Fig. 9 shows one such arrangement in which the condenser 3 discharges through two transformers. Transformer ATI (and associated condenser 27) provides a short high voltage pulse over a spark gap 28 to ionize the welding gap 1, 2, this pulse being followed by a longer pulse of lower voltage (to maintain the ionization) by transformer AT and associated condenser 35.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2003250A GB705164A (en) | 1950-08-11 | 1950-08-11 | Improvements relating to arc welding equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2003250A GB705164A (en) | 1950-08-11 | 1950-08-11 | Improvements relating to arc welding equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
GB705164A true GB705164A (en) | 1954-03-10 |
Family
ID=10139232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2003250A Expired GB705164A (en) | 1950-08-11 | 1950-08-11 | Improvements relating to arc welding equipment |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB705164A (en) |
-
1950
- 1950-08-11 GB GB2003250A patent/GB705164A/en not_active Expired
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