GB752797A - Improvements relating to electric switching systems - Google Patents

Improvements relating to electric switching systems

Info

Publication number
GB752797A
GB752797A GB219154A GB219154A GB752797A GB 752797 A GB752797 A GB 752797A GB 219154 A GB219154 A GB 219154A GB 219154 A GB219154 A GB 219154A GB 752797 A GB752797 A GB 752797A
Authority
GB
United Kingdom
Prior art keywords
contactor
lamp
resistor
jan
switching systems
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
GB219154A
Inventor
Christopher Evan Mundell Tibbs
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.)
Radio Heaters Ltd
Original Assignee
Radio Heaters 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
Application filed by Radio Heaters Ltd filed Critical Radio Heaters Ltd
Priority to GB219154A priority Critical patent/GB752797A/en
Publication of GB752797A publication Critical patent/GB752797A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/546—Delaying application of anode power supply with respect to application of filament heating power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

752,797. Protective arrangements; switching systems for transformers. RADIO HEATERS, Ltd. Jan. 25, 1955 [Jan. 25, 1954], No. 2191/54. Class 38 (4). Delayed action of a contactor 8 for shorting out surge-limiting resistors 9 in the primary circuit of a transformer 10, supplying hightension voltage to the oscillators of radio-frequency heating equipment, is obtained by arranging for the operating coil 12 of contactor 8 to be energized in parallel with a resistor having a large positive temperature coefficient (such as a tungsten filament lamp 20) over a common series resistor 15 when a main circuit-breaker 6 is closed, so that the low initial resistance of the lamp prevents immediate operation of the contactor. When the lamp resistance has increased sufficiently, the contactor responds and, in addition to short-circuiting the surge resistors 9, disconnects the lamp 20 and short-circuits resistor 15.
GB219154A 1954-01-25 1954-01-25 Improvements relating to electric switching systems Expired GB752797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB219154A GB752797A (en) 1954-01-25 1954-01-25 Improvements relating to electric switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB219154A GB752797A (en) 1954-01-25 1954-01-25 Improvements relating to electric switching systems

Publications (1)

Publication Number Publication Date
GB752797A true GB752797A (en) 1956-07-18

Family

ID=9735184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB219154A Expired GB752797A (en) 1954-01-25 1954-01-25 Improvements relating to electric switching systems

Country Status (1)

Country Link
GB (1) GB752797A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179806A (en) * 1985-07-16 1987-03-11 Hayashibara Ken Switching circuit for limiting surge current
GB2300982A (en) * 1995-05-19 1996-11-20 Eni Inc Soft-start arrangement for high-power module with large capacitor storage bank

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179806A (en) * 1985-07-16 1987-03-11 Hayashibara Ken Switching circuit for limiting surge current
GB2300982A (en) * 1995-05-19 1996-11-20 Eni Inc Soft-start arrangement for high-power module with large capacitor storage bank
US5627738A (en) * 1995-05-19 1997-05-06 Eni, A Division Of Astec America, Inc. Low cost, high reliability soft start arrangement
GB2300982B (en) * 1995-05-19 1999-12-01 Eni Inc Low cost, high reliability soft start arrangement

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