GB2017431B - Electronic flash device - Google Patents

Electronic flash device

Info

Publication number
GB2017431B
GB2017431B GB7907602A GB7907602A GB2017431B GB 2017431 B GB2017431 B GB 2017431B GB 7907602 A GB7907602 A GB 7907602A GB 7907602 A GB7907602 A GB 7907602A GB 2017431 B GB2017431 B GB 2017431B
Authority
GB
United Kingdom
Prior art keywords
flash device
electronic flash
electronic
flash
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
GB7907602A
Other versions
GB2017431A (en
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.)
Balda Werke Photographische Gerate und Kunststof GmbH and Co KG
Original Assignee
Balda Werke Photographische Gerate und Kunststof GmbH and Co KG
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 Balda Werke Photographische Gerate und Kunststof GmbH and Co KG filed Critical Balda Werke Photographische Gerate und Kunststof GmbH and Co KG
Priority to GB7908272A priority Critical patent/GB2017444B/en
Priority to SE7902284A priority patent/SE7902284L/en
Priority to JP2983079A priority patent/JPS54129951A/en
Priority to FR7906507A priority patent/FR2420245B1/en
Priority to CA000323530A priority patent/CA1137181A/en
Priority to US06/020,587 priority patent/US4260968A/en
Priority to DE19792910071 priority patent/DE2910071A1/en
Priority to NL7902034A priority patent/NL7902034A/en
Publication of GB2017431A publication Critical patent/GB2017431A/en
Application granted granted Critical
Publication of GB2017431B publication Critical patent/GB2017431B/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
    • H05B41/325—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation by measuring the incident light
GB7907602A 1978-03-06 1979-03-05 Electronic flash device Expired GB2017431B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB7908272A GB2017444B (en) 1978-03-14 1979-03-08 Active filter network
JP2983079A JPS54129951A (en) 1978-03-14 1979-03-14 Active filter circuit network
FR7906507A FR2420245B1 (en) 1978-03-14 1979-03-14 ACTIVE FILTER CIRCUIT WITHOUT INDUCTORS, AND RESULTING BAND PASS FILTERS
CA000323530A CA1137181A (en) 1978-03-14 1979-03-14 Active filter networks
SE7902284A SE7902284L (en) 1978-03-14 1979-03-14 ACTIVE FILTER CIRCUIT
US06/020,587 US4260968A (en) 1978-03-14 1979-03-14 Active filter network utilizing positive impedance converters
DE19792910071 DE2910071A1 (en) 1978-03-14 1979-03-14 BANDPASS FILTER
NL7902034A NL7902034A (en) 1978-03-14 1979-03-14 ACTIVE FILTER NETWORKS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782809617 DE2809617A1 (en) 1978-03-06 1978-03-06 ELECTRONIC FLASH DEVICE

Publications (2)

Publication Number Publication Date
GB2017431A GB2017431A (en) 1979-10-03
GB2017431B true GB2017431B (en) 1982-05-26

Family

ID=6033694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7907602A Expired GB2017431B (en) 1978-03-06 1979-03-05 Electronic flash device

Country Status (4)

Country Link
DE (1) DE2809617A1 (en)
FR (1) FR2419645A1 (en)
GB (1) GB2017431B (en)
IT (1) IT1111129B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120018B (en) * 1957-11-02 1961-12-21 Harro Mueller Dipl Ing Flash unit with control circuit
NL161031C (en) * 1968-01-17 1979-12-17 Philips Nv DEVICE FOR IGNITING AND FEEDING A DISCHARGE FLASHLIGHT.
US3586906A (en) * 1968-02-23 1971-06-22 Nippon Kogaku Kk Control circuit for photoflash discharge lamps

Also Published As

Publication number Publication date
IT1111129B (en) 1986-01-13
DE2809617A1 (en) 1979-09-13
IT7920723A0 (en) 1979-03-02
GB2017431A (en) 1979-10-03
FR2419645A1 (en) 1979-10-05

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Legal Events

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