GB2302220A - Ultra violet lamps - Google Patents

Ultra violet lamps

Info

Publication number
GB2302220A
GB2302220A GB9618939A GB9618939A GB2302220A GB 2302220 A GB2302220 A GB 2302220A GB 9618939 A GB9618939 A GB 9618939A GB 9618939 A GB9618939 A GB 9618939A GB 2302220 A GB2302220 A GB 2302220A
Authority
GB
United Kingdom
Prior art keywords
voltage
lamp
power supply
ultra
ultra violet
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.)
Granted
Application number
GB9618939A
Other versions
GB9618939D0 (en
GB2302220B (en
Inventor
Christopher David Jones
Richard Frederick Griffiths
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of GB9618939D0 publication Critical patent/GB9618939D0/en
Publication of GB2302220A publication Critical patent/GB2302220A/en
Application granted granted Critical
Publication of GB2302220B publication Critical patent/GB2302220B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

An ultra-violet lamp (19) has a pair of electrodes (31, 32) within the lamp, the electrodes being connected to a DC power supply (34). There is a coil (37) wound round the lamp, the coil being connected to an RF power supply (38). The DC power supply (34) and the RF power supply (38) are controlled by control means (39) adapted to activate an RF voltage in the coil (37) to initiate the supply of ultra-violet light (20) from the lamp, to activate a DC voltage between the electrodes (31, 32), and to switch off the RF voltage when the DC voltage is sufficient to maintain the supply of ultra-violet light.
GB9618939A 1994-03-24 1995-03-20 Ultra violet lamps Expired - Fee Related GB2302220B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9405829A GB9405829D0 (en) 1994-03-24 1994-03-24 Ultra violet lamps
PCT/GB1995/000604 WO1995026119A1 (en) 1994-03-24 1995-03-20 Ultra violet lamps

Publications (3)

Publication Number Publication Date
GB9618939D0 GB9618939D0 (en) 1996-10-23
GB2302220A true GB2302220A (en) 1997-01-08
GB2302220B GB2302220B (en) 1998-04-29

Family

ID=10752421

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9405829A Pending GB9405829D0 (en) 1994-03-24 1994-03-24 Ultra violet lamps
GB9618939A Expired - Fee Related GB2302220B (en) 1994-03-24 1995-03-20 Ultra violet lamps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9405829A Pending GB9405829D0 (en) 1994-03-24 1994-03-24 Ultra violet lamps

Country Status (6)

Country Link
EP (1) EP0752196A1 (en)
JP (1) JPH09510781A (en)
AU (1) AU1900695A (en)
CA (1) CA2186014A1 (en)
GB (2) GB9405829D0 (en)
WO (1) WO1995026119A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651366A (en) * 1969-05-28 1972-03-21 Giannini Inst Flash tube apparatus
EP0458545A2 (en) * 1990-05-23 1991-11-27 General Electric Company A starting aid for an electrodeless high intensity discharge lamp
EP0524022A1 (en) * 1991-07-19 1993-01-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Gas detection device and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651366A (en) * 1969-05-28 1972-03-21 Giannini Inst Flash tube apparatus
EP0458545A2 (en) * 1990-05-23 1991-11-27 General Electric Company A starting aid for an electrodeless high intensity discharge lamp
EP0524022A1 (en) * 1991-07-19 1993-01-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Gas detection device and method
WO1993002354A1 (en) * 1991-07-19 1993-02-04 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Gas detection device and method

Also Published As

Publication number Publication date
CA2186014A1 (en) 1995-09-28
EP0752196A1 (en) 1997-01-08
WO1995026119A1 (en) 1995-09-28
GB9405829D0 (en) 1994-05-11
JPH09510781A (en) 1997-10-28
GB9618939D0 (en) 1996-10-23
GB2302220B (en) 1998-04-29
AU1900695A (en) 1995-10-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990320