GB714127A - Improvements in or relating to electric circuit arrangements for supplying a load with alternating current - Google Patents

Improvements in or relating to electric circuit arrangements for supplying a load with alternating current

Info

Publication number
GB714127A
GB714127A GB2090652A GB2090652A GB714127A GB 714127 A GB714127 A GB 714127A GB 2090652 A GB2090652 A GB 2090652A GB 2090652 A GB2090652 A GB 2090652A GB 714127 A GB714127 A GB 714127A
Authority
GB
United Kingdom
Prior art keywords
valve
thyratron
load
cycle
circuit
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
GB2090652A
Inventor
Gerald Offley Crowther
Leon Henry Light
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co Ltd
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
Priority to BE522237D priority Critical patent/BE522237A/xx
Application filed by Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB2090652A priority patent/GB714127A/en
Priority to DEN7600A priority patent/DE961375C/en
Priority to CH321969D priority patent/CH321969A/en
Priority to ES0210898A priority patent/ES210898A1/en
Publication of GB714127A publication Critical patent/GB714127A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/007—Sequential discharge tubes

Landscapes

  • Generation Of Surge Voltage And Current (AREA)
  • Arc Welding Control (AREA)
  • Basic Packing Technique (AREA)

Abstract

714,127. Switching systems for resistance welders. MULLARD RADIO VALVE CO., Ltd. Aug. 20, 1952, No. 20906/52. Class 38(4) A circuit for supplying a load, such as a resistance welding transformer 9, with a half-cycle or part thereof of an alternating current supply at each time of operation of the circuit, comprises a valve 1 in series with the load and normally held non-conducting by A.C. bias 18, the valve being caused to conduct for half a cycle (or less) when desired by a triggering voltage pulse developed across a resistor 25 consequent upon conduction of a thyratron 19 when a switch 24 in the anode circuit of the last is closed. The precise point in the A.C. cycle at which the thyratron (and consequently the valve 1) fires is determined by a phaseshift circuit 32, 34 feeding the primary winding of a transformer 28 which continuously supplies firing pulses to the control grid of the thyratron. A valve 2 may be arranged to trail 1 so that the load receives a second half-cycle of opposite polarity to the first. By replacing the single thyratron by a system of, say, N discharge paths (which may be in a common envelope) and causing in succession each of the discharge paths to change from a state of non-conductivity to one of conduction the valve 1 may be caused to conduct N times for each closure of the switch 24. A hard valve oscillator, normally biased back so as not to oscillate, but triggered off by the peaking transformer 28, may replace the thyratron 19.
GB2090652A 1952-08-20 1952-08-20 Improvements in or relating to electric circuit arrangements for supplying a load with alternating current Expired GB714127A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE522237D BE522237A (en) 1952-08-20
GB2090652A GB714127A (en) 1952-08-20 1952-08-20 Improvements in or relating to electric circuit arrangements for supplying a load with alternating current
DEN7600A DE961375C (en) 1952-08-20 1953-08-18 Circuit arrangement, in particular for controlling an electrical resistance welding device
CH321969D CH321969A (en) 1952-08-20 1953-08-18 Circuit arrangement for alternating current supply of a load
ES0210898A ES210898A1 (en) 1952-08-20 1953-08-18 Improvements in or relating to electric circuit arrangements for supplying a load with alternating current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2090652A GB714127A (en) 1952-08-20 1952-08-20 Improvements in or relating to electric circuit arrangements for supplying a load with alternating current

Publications (1)

Publication Number Publication Date
GB714127A true GB714127A (en) 1954-08-25

Family

ID=10153796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2090652A Expired GB714127A (en) 1952-08-20 1952-08-20 Improvements in or relating to electric circuit arrangements for supplying a load with alternating current

Country Status (5)

Country Link
BE (1) BE522237A (en)
CH (1) CH321969A (en)
DE (1) DE961375C (en)
ES (1) ES210898A1 (en)
GB (1) GB714127A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE641723C (en) * 1935-01-23 1937-02-11 Aeg Device for electrical resistance welding, in particular for spot or point seam welding
US2494747A (en) * 1948-08-09 1950-01-17 Cutler Hammer Inc Arc welding system
US2533369A (en) * 1948-09-04 1950-12-12 Westinghouse Electric Corp Electronic sequence timer
US2510652A (en) * 1948-09-30 1950-06-06 Westinghouse Electric Corp Single-phase low-frequency control for welding

Also Published As

Publication number Publication date
ES210898A1 (en) 1953-12-01
DE961375C (en) 1957-04-04
CH321969A (en) 1957-05-31
BE522237A (en)

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