GB894492A - Improvements relating to the operation of electric discharge lamps - Google Patents

Improvements relating to the operation of electric discharge lamps

Info

Publication number
GB894492A
GB894492A GB1945657A GB1945657A GB894492A GB 894492 A GB894492 A GB 894492A GB 1945657 A GB1945657 A GB 1945657A GB 1945657 A GB1945657 A GB 1945657A GB 894492 A GB894492 A GB 894492A
Authority
GB
United Kingdom
Prior art keywords
lamp
discharge
condenser
flash
discharge lamps
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
GB1945657A
Inventor
Eric John George Beeson
Dennis Patrick Whelan
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB1945657A priority Critical patent/GB894492A/en
Publication of GB894492A publication Critical patent/GB894492A/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
    • 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

Abstract

894,492. Condenser charging and discharging circuits for photographic discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. July 23, 1958 [June 20, 1957], No. 19456/57. Class 38 (4). A circuit arrangement whereby a flash discharge for photographic purposes is obtained from a cold cathode discharge lamp 1 comprises a condenser 6 charged from a unidirectional voltage source 7 over a resistor 9 and normally closed contacts 8 of a relay the operating winding 10 of which is energized when the condenser 6 discharges through the lamp 1 to produce the flash whereupon the contacts 8 are opened to prevent the source 7 from supplying current t¾ the discharge path of the lamp 1. Any suitable starting device may be used to initiate the discharge of the lamp, as shown this comprises an electrode 5 The circuit may be modified to include two condensers and rectifiers whereby the supply may be an alternating voltage and the voltage doubling principle used. Specification 662,473 is referred to.
GB1945657A 1957-06-20 1957-06-20 Improvements relating to the operation of electric discharge lamps Expired GB894492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1945657A GB894492A (en) 1957-06-20 1957-06-20 Improvements relating to the operation of electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1945657A GB894492A (en) 1957-06-20 1957-06-20 Improvements relating to the operation of electric discharge lamps

Publications (1)

Publication Number Publication Date
GB894492A true GB894492A (en) 1962-04-26

Family

ID=10129665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1945657A Expired GB894492A (en) 1957-06-20 1957-06-20 Improvements relating to the operation of electric discharge lamps

Country Status (1)

Country Link
GB (1) GB894492A (en)

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