GB612242A - Improvements in or relating to electrical welding equipment - Google Patents

Improvements in or relating to electrical welding equipment

Info

Publication number
GB612242A
GB612242A GB1535446A GB1535446A GB612242A GB 612242 A GB612242 A GB 612242A GB 1535446 A GB1535446 A GB 1535446A GB 1535446 A GB1535446 A GB 1535446A GB 612242 A GB612242 A GB 612242A
Authority
GB
United Kingdom
Prior art keywords
contacts
condenser
relay
charging
transformer
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
Application number
GB1535446A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1535446A priority Critical patent/GB612242A/en
Publication of GB612242A publication Critical patent/GB612242A/en
Expired legal-status Critical Current

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

Abstract

612,242. Supply systems for resistance welding; condenser arrangements. STANDARD TELEPHONES & CABLES, Ltd., and ASHFORD, J. L. May 21, 1946, No. 15354. [Class 38 (iv)] In a control system for a capacity discharge welder, electromagnetic relays or switches control the charging and discharging of the condenser in such a manner that (1) the condenser is automatically charged between discharges, (2)'successive discharges pass through the primary winding of the welding transformer in opposite directions and (3) the relays or switches do not consume current between welds. As shown in Fig. 1, the system comprises a latch-in relay having operation and release coils DA, DB, respectively, a doublewound relay C and contactors A, B for reversing the connection of the condenser CN to the welding transformer X, Y. With the relays and contactors de-energized, their contacts are in the positions shown, so that the condenser is charged over contacts A1, B1. Closure of the weld-initiating switch FS energizes contactor A and discharges the condenser over contacts A2, A3, whilst disconnecting it from the charging source at A1. Release of FS de-energizes A, disconnecting the transformer and re-establishing the charging circuit, the charging current flowing through DA which picks up, latches in, closes contacts DA2, DA3 and opens contacts DA1. Closure of FS to initiate another weld now energizes contactor B so that the condenser discharges through the transformer in the reverse direction. Relay C is also energized and holds in over contacts C3, DA3, its contacts C1, C2 changing over so that when FS is opened the condenser charging current flows through the coil DB to release the DA contacts. Relay C holds in over contacts DB until the charging current has fallen to a low value, when DB and C will release. Opening of FS has also de-energized contactor B, so that the operating cycle is complete. In a modified arrangement the latch-in relay directly operates the reversing contacts for the transformer, the contactors A, B being replaced by a single relay controlled by the initiating switch and having change-over contacts for connecting the condenser to the charging and discharging circuits.
GB1535446A 1946-05-21 1946-05-21 Improvements in or relating to electrical welding equipment Expired GB612242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1535446A GB612242A (en) 1946-05-21 1946-05-21 Improvements in or relating to electrical welding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1535446A GB612242A (en) 1946-05-21 1946-05-21 Improvements in or relating to electrical welding equipment

Publications (1)

Publication Number Publication Date
GB612242A true GB612242A (en) 1948-11-10

Family

ID=10057657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1535446A Expired GB612242A (en) 1946-05-21 1946-05-21 Improvements in or relating to electrical welding equipment

Country Status (1)

Country Link
GB (1) GB612242A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943255A (en) * 1954-07-26 1960-06-28 Pa Co Inc Du Charging circuit
US4409461A (en) * 1981-09-23 1983-10-11 Kabushiki Kaisha Chuo Seisakusho Electrical resistance welder for nails used in an automatic nailing machine
US4620400A (en) * 1980-11-25 1986-11-04 Bouygues Prestressed concrete structure, a method of producing this structure, and elements for implementing the method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943255A (en) * 1954-07-26 1960-06-28 Pa Co Inc Du Charging circuit
US4620400A (en) * 1980-11-25 1986-11-04 Bouygues Prestressed concrete structure, a method of producing this structure, and elements for implementing the method
US4409461A (en) * 1981-09-23 1983-10-11 Kabushiki Kaisha Chuo Seisakusho Electrical resistance welder for nails used in an automatic nailing machine

Similar Documents

Publication Publication Date Title
US4363060A (en) Arcless tap changer for voltage regulator
GB612242A (en) Improvements in or relating to electrical welding equipment
US2126775A (en) Controller for inductive devices
GB754797A (en) Electromagnetic switch for direct or alternating current, particularly relay, contactor, overload switch, or the like
GB679789A (en) Improvements in and relating to earth leakage protection for single phase a.c. circuits
US2590302A (en) Electromagnetic timing relay
US2773234A (en) Electric discharge apparatus
US2802146A (en) Electric discharge apparatus
US2740934A (en) Electromagnetic converter
JPS5680373A (en) Controlling device for arc welding machine
GB607269A (en) Improvements in transformers with regulable output current
GB658381A (en) Improvements in and relating to switching systems employing saturable reactors
GB500763A (en) Improvements in and relating to methods of tap changing under load
US2784352A (en) Alternating-current control apparatus with holding magnets
GB1172312A (en) Control Device for Tapped Transformers
GB808575A (en) Improvements in and relating to "on-load" electrical switching arrangements comprising transition impedances
CN113315102B (en) Direct current circuit breaker of multi-terminal direct current transmission system
GB619439A (en) Improvements relating to on-load tap changing systems for electric transformers
US1017060A (en) System of electric-current distribution.
US2353392A (en) Electrical relay
GB625128A (en) Improvements in means for controlling the operation and release of electro-magnetic relays
US3254296A (en) Transfer switch for tap changers for regulating transformers
GB583230A (en) Improvements in or relating to apparatus for electric brazing or the like
SU1095256A1 (en) Hybrid a.c.contactor
GB1166617A (en) Improvements in or relating to Tapchanging Arrangements