GB837794A - Improvements in or relating to control circuits for welding systems - Google Patents
Improvements in or relating to control circuits for welding systemsInfo
- Publication number
- GB837794A GB837794A GB5549/58A GB554958A GB837794A GB 837794 A GB837794 A GB 837794A GB 5549/58 A GB5549/58 A GB 5549/58A GB 554958 A GB554958 A GB 554958A GB 837794 A GB837794 A GB 837794A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thyratron
- capacitor
- circuit
- conducts
- contacts
- 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
- B23K11/26—Storage discharge welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
837,794. Control systems for resistance welders. ROBOTRON CORPORATION. Feb. 20, 1958 [April 29, 1957], No. 5549/58. Class 38 (4). A timing circuit for controlling the "squeeze" "weld" " hold " &c. operations of a welding system, wherein an additional timing circuit allows the welding current to flow during the " hold " period comprises a number of interconnected valves preferably thyratrons connected to capacitive resistance timing circuits. On closing a starting switch 8, a thyratron 6 conducts, energizing a relay 3 and closing contacts 9, 17, 18, contact 9 completing the electrode closing circuit, and contacts 18 shunting the starting switch 8. Contacts 17 complete the thyratron 12 circuit, but this does not conduct until the negative potential on the grid 24 supplied by the capacitor 28 falls. Conduction of thyratron 12 shunts a capacitor 48 which has been charging over a rectifier 44, and this discharging through a resistance 47 fires a thyratron 34 energizing transformer 37, firing thyratron 64 and operating a relay 66, 67 controlling the welding current. After a time interval, the discharging of capacitors 48, 56 in opposite senses blocks the thyratron 34, but thyratron 64 still conducts temporarily until the charge on a capacitor 55 becomes less than that of capacitor 56. At the same time as thyratron 34 is blocked a thyratron 74 is also blocked through a conductor 79, causing a capacitor 77 in the anode circuit which determines the hold period to discharge, after which time a thyratron 84 conducts and supplies a blocking potential to the thyratron 6 permitting the welding electrodes to open. If the starting switch 8 is held closed a further cycle of operations will follow as soon as a capacitor 89 in the anode circuit of thyratron 84 discharges through a resistor 87. Specification 833,389 and U.S.A. Specification 2,776,383 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US837794XA | 1957-04-29 | 1957-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB837794A true GB837794A (en) | 1960-06-15 |
Family
ID=22180645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5549/58A Expired GB837794A (en) | 1957-04-29 | 1958-02-20 | Improvements in or relating to control circuits for welding systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB837794A (en) |
-
1958
- 1958-02-20 GB GB5549/58A patent/GB837794A/en not_active Expired
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