GB978279A - Electrical switching arrangement - Google Patents

Electrical switching arrangement

Info

Publication number
GB978279A
GB978279A GB3862063A GB3862063A GB978279A GB 978279 A GB978279 A GB 978279A GB 3862063 A GB3862063 A GB 3862063A GB 3862063 A GB3862063 A GB 3862063A GB 978279 A GB978279 A GB 978279A
Authority
GB
United Kingdom
Prior art keywords
rectifier
switching
switch
controlled
lamp
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
GB3862063A
Inventor
Euan Rannoch Orr
Charles Edward Judd
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 GB3862063A priority Critical patent/GB978279A/en
Publication of GB978279A publication Critical patent/GB978279A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/08—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices
    • H05B39/083—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices by the variation-rate of light intensity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
    • G05F1/455—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with phase control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

978,279. Switching systems for consumer devices. STANDARD TELEPHONES & CABLES Ltd. Oct. 1, 1963, No. 38620/63. Heading H2H. An incandescent lamp 1 energized from an A.C. supply is controlled by a switching arrangement comprising switches 4, 5, a rectifier bridge 9 and a silicon-controlled rectifier 10, so that closure of switch 4 operates the lamp at full brightness and closure of the switch 5 allows the lamp to be dimmed to an extent dependent on the instant of switching of the rectifier 10 in each half cycle of the supply. The rectifier 10 is controlled by a timing circuit comprising a capacitor 14 which applies a switching pulse to the gate of rectifier 10 when transistors 15, 16 become (sequentially) conductive, the time taken for this to occur being determined by the setting of a variable resistance 13 so coupled to switch 5 that when the latter is closed the maximum resistance is present in the timing circuit. The minimum resistance value is determined by resistor 12 so chosen that the maximum power rating of rectifier 10 is not exceeded. An L.C. suppressor circuit 6, 7, 8 is provided.
GB3862063A 1963-10-01 1963-10-01 Electrical switching arrangement Expired GB978279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3862063A GB978279A (en) 1963-10-01 1963-10-01 Electrical switching arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3862063A GB978279A (en) 1963-10-01 1963-10-01 Electrical switching arrangement

Publications (1)

Publication Number Publication Date
GB978279A true GB978279A (en) 1964-12-23

Family

ID=10404619

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3862063A Expired GB978279A (en) 1963-10-01 1963-10-01 Electrical switching arrangement

Country Status (1)

Country Link
GB (1) GB978279A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133643A (en) * 1982-12-09 1984-07-25 Trw Canada Ltd Power controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133643A (en) * 1982-12-09 1984-07-25 Trw Canada Ltd Power controller

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