GB1374245A - Electronic photoflash - Google Patents

Electronic photoflash

Info

Publication number
GB1374245A
GB1374245A GB3970471A GB3970471A GB1374245A GB 1374245 A GB1374245 A GB 1374245A GB 3970471 A GB3970471 A GB 3970471A GB 3970471 A GB3970471 A GB 3970471A GB 1374245 A GB1374245 A GB 1374245A
Authority
GB
United Kingdom
Prior art keywords
tube
capacitor
thyristor
flash
circuit
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
GB3970471A
Other languages
English (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.)
Ponder & Best
Original Assignee
Ponder & Best
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 Ponder & Best filed Critical Ponder & Best
Publication of GB1374245A publication Critical patent/GB1374245A/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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Exposure Control For Cameras (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
GB3970471A 1970-08-24 1971-08-24 Electronic photoflash Expired GB1374245A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
BE93116 1970-08-24
BE94290 1970-09-23
BE100618 1971-03-08
BE102057 1971-04-09
BE104488 1971-06-11

Publications (1)

Publication Number Publication Date
GB1374245A true GB1374245A (en) 1974-11-20

Family

ID=27507527

Family Applications (5)

Application Number Title Priority Date Filing Date
GB3970471A Expired GB1374245A (en) 1970-08-24 1971-08-24 Electronic photoflash
GB2022174A Expired GB1374249A (en) 1970-08-24 1971-08-24 Electronic photoflash
GB2016374A Expired GB1374247A (enrdf_load_stackoverflow) 1970-08-24 1971-08-24
GB2016474A Expired GB1374248A (en) 1970-08-24 1971-08-24 Control systems
GB1991974A Expired GB1374246A (en) 1970-08-24 1971-08-24 Electric switch

Family Applications After (4)

Application Number Title Priority Date Filing Date
GB2022174A Expired GB1374249A (en) 1970-08-24 1971-08-24 Electronic photoflash
GB2016374A Expired GB1374247A (enrdf_load_stackoverflow) 1970-08-24 1971-08-24
GB2016474A Expired GB1374248A (en) 1970-08-24 1971-08-24 Control systems
GB1991974A Expired GB1374246A (en) 1970-08-24 1971-08-24 Electric switch

Country Status (3)

Country Link
JP (11) JPS524933B1 (enrdf_load_stackoverflow)
DE (5) DE2166610A1 (enrdf_load_stackoverflow)
GB (5) GB1374245A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134662A (en) * 1983-01-24 1984-08-15 Eastman Kodak Co Electronic flash apparatus
US4540265A (en) * 1983-01-24 1985-09-10 Eastman Kodak Company Energy-saving electronic flash apparatus
EP1083458A3 (en) * 1999-09-07 2005-07-27 Konica Corporation Lens-fitted film unit with strobe circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738984A1 (de) * 1977-08-30 1979-03-15 Rollei Werke Franke Heidecke Elektronenblitzgeraet fuer fotografische aufnahmezwecke
JPS55134823A (en) 1979-04-06 1980-10-21 Olympus Optical Co Ltd Strobe light emission control system
JPS63170484U (enrdf_load_stackoverflow) * 1987-04-23 1988-11-07

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1966984A1 (de) * 1968-02-13 1976-03-25 Ponder & Best Elektronenblitzgeraet mit fremdblitzsperre
US3519879A (en) * 1968-07-25 1970-07-07 Honeywell Inc Flash apparatus with automatic light termination having gating and anticipation means
JPS5038616Y2 (enrdf_load_stackoverflow) * 1971-09-01 1975-11-07
JPS5149410A (ja) * 1974-10-25 1976-04-28 Hitachi Ltd Tatejikugatadendoki

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134662A (en) * 1983-01-24 1984-08-15 Eastman Kodak Co Electronic flash apparatus
US4540265A (en) * 1983-01-24 1985-09-10 Eastman Kodak Company Energy-saving electronic flash apparatus
EP1083458A3 (en) * 1999-09-07 2005-07-27 Konica Corporation Lens-fitted film unit with strobe circuit

Also Published As

Publication number Publication date
JPS5427140B2 (enrdf_load_stackoverflow) 1979-09-07
JPS50112029A (enrdf_load_stackoverflow) 1975-09-03
GB1374246A (en) 1974-11-20
DE2166612B2 (de) 1975-12-04
JPS50112031A (enrdf_load_stackoverflow) 1975-09-03
DE2166611A1 (de) 1975-05-07
JPS629890B2 (enrdf_load_stackoverflow) 1987-03-03
JPS50112028A (enrdf_load_stackoverflow) 1975-09-03
JPS50112032A (enrdf_load_stackoverflow) 1975-09-03
DE2166611B2 (de) 1978-05-18
DE2142081B2 (de) 1976-02-12
DE2166610A1 (de) 1974-11-14
DE2142081A1 (de) 1972-04-13
GB1374249A (en) 1974-11-20
JPS50112030A (enrdf_load_stackoverflow) 1975-09-03
DE2166613A1 (de) 1975-05-07
JPS50112027A (enrdf_load_stackoverflow) 1975-09-03
JPS524933B1 (enrdf_load_stackoverflow) 1977-02-08
JPS5410099B2 (enrdf_load_stackoverflow) 1979-05-01
DE2166613B2 (de) 1975-10-30
GB1374247A (enrdf_load_stackoverflow) 1974-11-20
JPS50112025A (enrdf_load_stackoverflow) 1975-09-03
JPS544849B2 (enrdf_load_stackoverflow) 1979-03-10
JPS54102119U (enrdf_load_stackoverflow) 1979-07-18
DE2166612A1 (de) 1975-05-07
JPS50111566A (enrdf_load_stackoverflow) 1975-09-02
GB1374248A (en) 1974-11-20
JPS50112026A (enrdf_load_stackoverflow) 1975-09-03

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Legal Events

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