GB721112A - Improvements in or relating to lighting and like circuits - Google Patents

Improvements in or relating to lighting and like circuits

Info

Publication number
GB721112A
GB721112A GB20899/53A GB2089953A GB721112A GB 721112 A GB721112 A GB 721112A GB 20899/53 A GB20899/53 A GB 20899/53A GB 2089953 A GB2089953 A GB 2089953A GB 721112 A GB721112 A GB 721112A
Authority
GB
United Kingdom
Prior art keywords
relay
relays
coils
tappings
july
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
GB20899/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB721112A publication Critical patent/GB721112A/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
    • H05B39/06—Switching arrangements, e.g. from series operation to parallel operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00—Ground or aircraft-carrier-deck installations
    • B64F1/18—Visual or acoustic landing aids
    • B64F1/20—Arrangement of optical beacons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/26—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil having thermo-sensitive input
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H02H7/055—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for tapped transformers or tap-changing means thereof
    • 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
    • H05B39/041—Controlling the light-intensity of the source
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Traffic Control Systems (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

721,112. Switching systems; transformer systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. July 28, 1953 [July 31, 1952], No. 20899/53. Class 38 (4). In a variable voltage supply system for an aerodrome lighting, or other, load 10, comprising a potentiometer or transformer winding 3 having tappings to which the load may be selectively connected by contacts 7-9 of relays 14-16 which are individually operated by manual switches 20-22 in an A.C. control circuit including the coils 17-19 of the relays, short-circuits between the tappings, due to failure of a relay to release when changing from one voltage to another, is prevented by the provision of (a) an acceptor circuit 23, 24 in the common lead to the relay coils, and (b) auxiliary relay contacts 25-27 adapted to short-circuit the condenser 24 of the acceptor circuit when any relay pull-in, thereby reducing the voltage across the coil of the operated relay to a holding value which is insufficient to allow actuation of another of the relays should the first relay fail to release upon opening of its appropriate switch 20-22. The impedance of the reactor 23 may be approximately equal to that of the separate relay coils in the deenergized condition of the relays.
GB20899/53A 1952-07-31 1953-07-28 Improvements in or relating to lighting and like circuits Expired GB721112A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL315718X 1952-07-31

Publications (1)

Publication Number Publication Date
GB721112A true GB721112A (en) 1954-12-29

Family

ID=19783797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20899/53A Expired GB721112A (en) 1952-07-31 1953-07-28 Improvements in or relating to lighting and like circuits

Country Status (6)

Country Link
US (1) US2748344A (en)
BE (1) BE521805A (en)
CH (1) CH315718A (en)
DE (1) DE935073C (en)
GB (1) GB721112A (en)
NL (2) NL171525B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409150A (en) * 1943-07-13 1946-10-08 Automatic Elect Lab Electrical circuit employing nonlinear resistance material
US2402573A (en) * 1944-02-23 1946-06-25 Cutler Hammer Inc Frequency relay circuits
US2498236A (en) * 1947-08-21 1950-02-21 Westinghouse Electric Corp Control system for alternating current motors

Also Published As

Publication number Publication date
DE935073C (en) 1955-11-10
US2748344A (en) 1956-05-29
BE521805A (en)
NL171525B (en)
NL83994C (en)
CH315718A (en) 1956-08-31

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