GB687195A - Improvements in apparatus comprising an electric discharge lamp for producing flashes of light - Google Patents

Improvements in apparatus comprising an electric discharge lamp for producing flashes of light

Info

Publication number
GB687195A
GB687195A GB2192148A GB2192148A GB687195A GB 687195 A GB687195 A GB 687195A GB 2192148 A GB2192148 A GB 2192148A GB 2192148 A GB2192148 A GB 2192148A GB 687195 A GB687195 A GB 687195A
Authority
GB
United Kingdom
Prior art keywords
lamp
mms
condenser
envelope
impedance
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
GB2192148A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2192148A priority Critical patent/GB687195A/en
Publication of GB687195A publication Critical patent/GB687195A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/90—Lamps suitable only for intermittent operation, e.g. flash lamp
    • 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
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

687,195. Discharge lamps. GENERAL ELECTRIC CO., Ltd., and FRANCIS, V.J. Sept. 7, 1949 [Aug. 19, 1948], No. 21921/48. Class 39(i) [Also in Group. XXXV] Apparatus for producing flashes of light comprises a condenser 9 which can be charged from a direct current source 7, 10 and rapidly discharged by the switch 5 between the main electrode 2, 11 of a gas or vapour-filled electric discharge lamp 1, the lamp including a quartz tube, which may be inside the envelope or may be part of the envelope of the lamp, arranged to constrict substantially the whole length of the discharge, and an inductive impedance 3 being included in series with the lamp in the condenser discharge path, the capacity and voltage rating of the condenser 9 and the inductance of the impedance 3 being such that the apparatus can operate with an energy dissipation per flash exceeding 35 joules per sq. cm. of internal surface of the quartz tube, measured only over the length containing the discharge path if the tube is longer than the discharge path. The lamp may be provided with auxiliary starting electrodes, for example conductors extending between the electrodes on the outer surface of the enelope. The quartz envelope is of internal diameter 4 mms.; wall thickness 2 mms., and internal length 11 cms. The electrodes consist of tungsten rods of 3 mms. diameter sealed into the ends of the envelope and terminated by strip foil seals so as to leave an arc gap of 7 cms. The filling consists of xenon at a pressure of 300 mms. of mercury. The condenser 9 is of 300ÁF capacity capable of being charged to more than 2000 volts and the impedance 3 is of 80 ÁH inductance, giving an energy dissipation per flash exceeding 68 joules per sq. cm. of internal surface of the quartz tube. According to the Provisional Specification the arc gap is 8 cms. and the impedance 3 is of 10 ÁH inductance. Specifications 9206/03, [Class 39], and 344,439 are referred to.
GB2192148A 1948-08-19 1948-08-19 Improvements in apparatus comprising an electric discharge lamp for producing flashes of light Expired GB687195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2192148A GB687195A (en) 1948-08-19 1948-08-19 Improvements in apparatus comprising an electric discharge lamp for producing flashes of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2192148A GB687195A (en) 1948-08-19 1948-08-19 Improvements in apparatus comprising an electric discharge lamp for producing flashes of light

Publications (1)

Publication Number Publication Date
GB687195A true GB687195A (en) 1953-02-11

Family

ID=10171047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2192148A Expired GB687195A (en) 1948-08-19 1948-08-19 Improvements in apparatus comprising an electric discharge lamp for producing flashes of light

Country Status (1)

Country Link
GB (1) GB687195A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893289A (en) * 1953-03-09 1959-07-07 Harold E Edgerton Microscope flash-photography system and apparatus
DE1101612B (en) * 1959-12-21 1961-03-09 Deutsche Elektronik Gmbh Flash lamp
US3014156A (en) * 1958-03-01 1961-12-19 Osterhammel Kurt Arrangement for irradiation with ultraviolet rays

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893289A (en) * 1953-03-09 1959-07-07 Harold E Edgerton Microscope flash-photography system and apparatus
US3014156A (en) * 1958-03-01 1961-12-19 Osterhammel Kurt Arrangement for irradiation with ultraviolet rays
DE1101612B (en) * 1959-12-21 1961-03-09 Deutsche Elektronik Gmbh Flash lamp

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