GB1379077A - Airfield lighting circuit arrangements - Google Patents

Airfield lighting circuit arrangements

Info

Publication number
GB1379077A
GB1379077A GB401272A GB401272A GB1379077A GB 1379077 A GB1379077 A GB 1379077A GB 401272 A GB401272 A GB 401272A GB 401272 A GB401272 A GB 401272A GB 1379077 A GB1379077 A GB 1379077A
Authority
GB
United Kingdom
Prior art keywords
circuit
loop
power factor
jan
phase comparator
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
GB401272A
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 BE794608D priority Critical patent/BE794608A/en
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB401272A priority patent/GB1379077A/en
Priority to US00324943A priority patent/US3829735A/en
Priority to DE2303655A priority patent/DE2303655A1/en
Priority to FR7302716A priority patent/FR2169287B1/fr
Priority to SE7301111A priority patent/SE384963B/en
Priority to IT19700/73A priority patent/IT978546B/en
Publication of GB1379077A publication Critical patent/GB1379077A/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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/23—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in series

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1379077 Lamp failure alarms PLESSEY CO Ltd 16 Jan 1973 [28 Jan 1972 14 April 1972] 4012/72 and 17446/72 Heading G4N An airfield lighting circuit comprises a loop circuit which includes a number of lighting units 2 connected to the loop by transformers 3, and means operable in dependence on the power factor of the loop to give an output indicative of one or more of the lighting units being open circuit. Failure of one of the lamps 2 open circuits the secondary of its associated transformer 3, so that the leakage inductance modifies the power factor of the circuit 1. The change in power factor is detected by a phase comparator 6 to cause relay 11 to release, closing contacts 12 in an alarm circuit. In an alternative form of phase comparator, Fig. 2 (not shown) zero crossing of the current and voltage set and reset a switching circuit (26) to produce pulses having a width proportional to phase difference. These are then used to gate a full wave rectified signal from the source to produce a linear output.
GB401272A 1972-01-28 1972-01-28 Airfield lighting circuit arrangements Expired GB1379077A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE794608D BE794608A (en) 1972-01-28 IMPROVEMENTS RELATING TO THE LAYOUT OF CIRCUITS
GB401272A GB1379077A (en) 1972-01-28 1972-01-28 Airfield lighting circuit arrangements
US00324943A US3829735A (en) 1972-01-28 1973-01-19 Airfield lighting circuit arrangements
DE2303655A DE2303655A1 (en) 1972-01-28 1973-01-25 CIRCUIT ARRANGEMENT
FR7302716A FR2169287B1 (en) 1972-01-28 1973-01-26
SE7301111A SE384963B (en) 1972-01-28 1973-01-26 COUPLING DEVICE WITH A NUMBER IN A SLING COUPLING CONNECTED LIGHTING UNITS
IT19700/73A IT978546B (en) 1972-01-28 1973-01-26 CIRCUIT COMPLEX FOR ILLUMINATION LAMPS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB401272A GB1379077A (en) 1972-01-28 1972-01-28 Airfield lighting circuit arrangements
GB1744672 1972-04-14

Publications (1)

Publication Number Publication Date
GB1379077A true GB1379077A (en) 1975-01-02

Family

ID=26238753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB401272A Expired GB1379077A (en) 1972-01-28 1972-01-28 Airfield lighting circuit arrangements

Country Status (7)

Country Link
US (1) US3829735A (en)
BE (1) BE794608A (en)
DE (1) DE2303655A1 (en)
FR (1) FR2169287B1 (en)
GB (1) GB1379077A (en)
IT (1) IT978546B (en)
SE (1) SE384963B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012726A1 (en) * 1979-04-04 1980-10-16 Gioertz Leif Heegaard DISPLAY DEVICE, IN PARTICULAR FOR USE IN AIRPORT LIGHTING SYSTEMS

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138627A (en) * 1975-09-02 1979-02-06 Hughey And Phillips, Inc. Current-level-sensitive switching system
DE2829135C2 (en) * 1978-07-03 1982-09-02 Siemens AG, 1000 Berlin und 8000 München Monitoring device for the lamp failure in the case of an airport lighting system
JPS55121156A (en) * 1979-03-13 1980-09-18 Toshiba Corp Core disconnection detection unit
JPS55139795A (en) * 1979-04-19 1980-10-31 Tokyo Shibaura Electric Co Core disconnector detector for series firing circuit
US4441055A (en) * 1980-06-10 1984-04-03 Kaunassky Politekhnichesky Institut Lighting system
US4449073A (en) * 1982-06-14 1984-05-15 Multi Electric Mfg. Inc. Runway approach lighting system with fault monitor
JP2557527B2 (en) * 1989-07-31 1996-11-27 株式会社東芝 Light core break detector
JP2923324B2 (en) * 1990-03-20 1999-07-26 株式会社東芝 Light core break detector
DE4110990A1 (en) * 1991-04-05 1992-10-08 Standard Elektrik Lorenz Ag DEVICE FOR TESTING SIGNAL LAMPS IN RAILWAY SYSTEMS
US5638057A (en) * 1994-05-09 1997-06-10 Adb-Alnaco, Inc. Ground fault detection and measurement system for airfield lighting system
US5648723A (en) * 1994-05-09 1997-07-15 Adb-Alnaco, Inc. Method and apparatus for separating and analyzing composite AC/DC waveforms
US6305602B1 (en) 1997-12-01 2001-10-23 Diebold, Incorporated Light monitoring system and method for automated transaction machine
WO2001063976A1 (en) * 2000-02-21 2001-08-30 Siemens Aktiengesellschaft Lamp failure and insulation alarm system
US6911777B1 (en) * 2003-08-14 2005-06-28 Cooper Industries, Inc. Clamp-on low power isolation transformer for airfield lighting
US7088263B1 (en) 2004-06-08 2006-08-08 Controlled Power Company Runway approach lighting system and method
US7068188B1 (en) 2004-06-08 2006-06-27 Controlled Power Company Runway approach lighting system and method
US9008992B2 (en) 2011-03-25 2015-04-14 Thomas & Betts International, Inc. Testing and monitoring an electrical system
US10516294B2 (en) 2015-02-09 2019-12-24 Eaton Intelligent Power Limited Uninterruptible constant current regulator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061828A (en) * 1958-03-11 1962-10-30 Basic Products Corp Circuit means
BE759346A (en) * 1969-11-28 1971-04-30 Jeumont Schneider AUTOMATIC REGULATION PROCESS AND DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012726A1 (en) * 1979-04-04 1980-10-16 Gioertz Leif Heegaard DISPLAY DEVICE, IN PARTICULAR FOR USE IN AIRPORT LIGHTING SYSTEMS

Also Published As

Publication number Publication date
FR2169287A1 (en) 1973-09-07
SE384963B (en) 1976-05-24
US3829735A (en) 1974-08-13
IT978546B (en) 1974-09-20
FR2169287B1 (en) 1978-03-03
BE794608A (en) 1973-05-16
DE2303655A1 (en) 1973-08-02

Similar Documents

Publication Publication Date Title
GB1379077A (en) Airfield lighting circuit arrangements
GB1497817A (en) Discharge lamp lighting device
ES430020A1 (en) Indicator light testing circuit
GB983858A (en) An improved electrical signalling circuit
ES8103534A1 (en) Fault detector for vehicle brake lights
SE7708102L (en) DEVICE FOR AN AC SWITCH CONTROLLER
GB1422596A (en) Oscillator circuit and protection arrangement therefor
JPS5713303A (en) Device for detecting position
US2622139A (en) Ground detecting apparatus
GB1087478A (en) Control device for signal lamps
JPS5611351A (en) Time division-type multifrequency eddy current
GB1300579A (en) Signal detector apparatus
SU943806A1 (en) Device for switching-on and checking ship lamps and signalling side lights
GB1508130A (en) Emergency lighting systems
SU128525A1 (en) Signaling device for single-phase earth faults
ES379840A1 (en) Scr control for inductive power circuit
SU1096683A2 (en) Device for switching and checking marine lamps of signal-distinctive lanterns
FR2316850A7 (en) Interrogation circuit for signalling switches in digital appts. - uses one transformer for two switches and is typically for remote reading of electricity meters
RU1789943C (en) Passage of short-circuit currents indicator
GB1130583A (en) Control systems for switching an a.c. electric supply
GB1189673A (en) Improvements in or relating to Electric Circuit Arrangements.
ES211492U (en) Indicator-advisor of small intensity defect currents. (Machine-translation by Google Translate, not legally binding)
FR2339865A1 (en) Failure detection circuit e.g. for vehicle electrics - with permanent magnet adjacent coil wound around switch contacts
GB412235A (en) Improvements in and relating to electrical systems for providing a sequence of operations
JPS5698661A (en) Inductance measurememt device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee