GB1506451A - Airfield lighting circuits - Google Patents
Airfield lighting circuitsInfo
- Publication number
- GB1506451A GB1506451A GB4130/75A GB413075A GB1506451A GB 1506451 A GB1506451 A GB 1506451A GB 4130/75 A GB4130/75 A GB 4130/75A GB 413075 A GB413075 A GB 413075A GB 1506451 A GB1506451 A GB 1506451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- signal
- lamp
- lamps
- alarm
- 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
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
1506451 Lamp failure alarms BRITISH AIRPORTS AUTHORITY 27 Jan 1976 [30 Jan 1975] 4130/75 Heading G4N Failure of a lamp in an airfield lighting circuit is detected by causing a signal to be transmitted along the supply circuit when a lamp fails and picking-up this signal at an alarm circuit. As shown, a 50 Hz, variable voltage, constantcurrent power source 1 supplies over a loop 2 and via transformers 4 a plurality of lamps 8. Selected lamps or groups of lamps are connected to the transformer secondary windings by signal generating and transmitting circuits 10 which each include a semi-conductor driver circuit which detects open-circuiting of its associated lamp to cause a 4 kHz signal to be transmitted to the loop 2. A 4 kHz detector circuit and alarm relay 12 detects this signal, by means of a transformer 6, to operate an alarm. Each circuit 10 may transmit an individual frequency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4130/75A GB1506451A (en) | 1976-01-27 | 1976-01-27 | Airfield lighting circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4130/75A GB1506451A (en) | 1976-01-27 | 1976-01-27 | Airfield lighting circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1506451A true GB1506451A (en) | 1978-04-05 |
Family
ID=9771320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4130/75A Expired GB1506451A (en) | 1976-01-27 | 1976-01-27 | Airfield lighting circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1506451A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376910A (en) * | 1979-07-16 | 1983-03-15 | Jeumont-Schneider | Power supply and control device for the proper operation of a railway traffic light |
GB2135540A (en) * | 1983-02-17 | 1984-08-30 | Pa Consulting Services | Lamp failure alarm |
GB2176640A (en) * | 1985-06-14 | 1986-12-31 | Raymond Bruce Mcclelland Hardy | Apparatus for determining the operational status of equipment |
EP0319440A1 (en) * | 1987-12-04 | 1989-06-07 | Jean-Luc Finzel | Unit for the protection, signalisation and localisation of defects in the operation of lighting units in a lighting network divided into zones |
US5034659A (en) * | 1989-07-31 | 1991-07-23 | Kabushiki Kaisha Toshiba | Lamp circuit with disconnected lamp detecting device |
US5099177A (en) * | 1990-03-06 | 1992-03-24 | Kabushiki Kaisha Toshiba | Lamp circuit with disconnected lamp detecting device |
GB2261286A (en) * | 1981-04-03 | 1993-05-12 | Thomson Csf | Test device for a group of receivers |
US5359325A (en) * | 1991-10-03 | 1994-10-25 | Cooper Industries, Inc. | Automatic monitoring system for airfield lighting systems |
US5485151A (en) * | 1993-05-06 | 1996-01-16 | Adb-Alnaco, Inc. | Airfield lighting system |
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 |
WO1998015840A2 (en) * | 1996-09-26 | 1998-04-16 | Denis Vadimovich Andreev | System for monitoring the condition of a plurality of lamps |
-
1976
- 1976-01-27 GB GB4130/75A patent/GB1506451A/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376910A (en) * | 1979-07-16 | 1983-03-15 | Jeumont-Schneider | Power supply and control device for the proper operation of a railway traffic light |
GB2261286B (en) * | 1981-04-03 | 1993-09-29 | Thomson Csf | Test device for a group of receivers |
GB2261286A (en) * | 1981-04-03 | 1993-05-12 | Thomson Csf | Test device for a group of receivers |
GB2135540A (en) * | 1983-02-17 | 1984-08-30 | Pa Consulting Services | Lamp failure alarm |
GB2176640A (en) * | 1985-06-14 | 1986-12-31 | Raymond Bruce Mcclelland Hardy | Apparatus for determining the operational status of equipment |
EP0319440A1 (en) * | 1987-12-04 | 1989-06-07 | Jean-Luc Finzel | Unit for the protection, signalisation and localisation of defects in the operation of lighting units in a lighting network divided into zones |
FR2624335A1 (en) * | 1987-12-04 | 1989-06-09 | Finzel Jean Luc | SELECTIVE DETECTION AND SIGNALING ASSEMBLY OF OPERATING FAULTS OF LIGHTING UNITS IN A LIGHTING ARRAY |
US5034659A (en) * | 1989-07-31 | 1991-07-23 | Kabushiki Kaisha Toshiba | Lamp circuit with disconnected lamp detecting device |
US5099177A (en) * | 1990-03-06 | 1992-03-24 | Kabushiki Kaisha Toshiba | Lamp circuit with disconnected lamp detecting device |
US5359325A (en) * | 1991-10-03 | 1994-10-25 | Cooper Industries, Inc. | Automatic monitoring system for airfield lighting systems |
US5485151A (en) * | 1993-05-06 | 1996-01-16 | Adb-Alnaco, Inc. | Airfield lighting system |
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 |
WO1998015840A2 (en) * | 1996-09-26 | 1998-04-16 | Denis Vadimovich Andreev | System for monitoring the condition of a plurality of lamps |
WO1998015840A3 (en) * | 1996-09-26 | 1998-10-08 | Denis Vadimovich Andreev | System for monitoring the condition of a plurality of lamps |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |