JPS5767918A - Flash device - Google Patents

Flash device

Info

Publication number
JPS5767918A
JPS5767918A JP55144801A JP14480180A JPS5767918A JP S5767918 A JPS5767918 A JP S5767918A JP 55144801 A JP55144801 A JP 55144801A JP 14480180 A JP14480180 A JP 14480180A JP S5767918 A JPS5767918 A JP S5767918A
Authority
JP
Japan
Prior art keywords
turned
switch
protective resistance
tube
trs
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.)
Pending
Application number
JP55144801A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Takematsu
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.)
Fuji Koeki Corp
Original Assignee
Fuji Koeki Corp
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 Fuji Koeki Corp filed Critical Fuji Koeki Corp
Priority to JP55144801A priority Critical patent/JPS5767918A/en
Priority to GB8130862A priority patent/GB2088157A/en
Priority to NL8104680A priority patent/NL8104680A/en
Priority to DE19813140828 priority patent/DE3140828A1/en
Priority to FR8119358A priority patent/FR2492211A1/en
Publication of JPS5767918A publication Critical patent/JPS5767918A/en
Pending 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
    • 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
    • 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

Abstract

PURPOSE:To avoid not only the emission of light but the oscillation although a contact for synchronizing is turned on when a switch is manually turned off, by connecting a changeover switch to a control transistor. CONSTITUTION:When a switch 9 is turned off, the load of a bias capacitor 11 is discharged through a protective resistance 10 and at the same time, negative charge is applied to the base of a control transistor (TR) 7 through a protective resistance 12, a variable resistance 13 and a diode 14. As a result, the transistor 7 is turned off and at the smae time a TR6 is also turned off. Thus the base circuits of oscillating TRs 3 and 4 are cut off to stop the operation of both TRs 3 and 4. When a switch 31 is turned off, the circuit of a neon tube 26 is cut off to turn off the tube 26. At the same time, the load of a trigger capacitor 32 is discharged through a protective resistance 30 and the primary side coil 33 of a trigger coil 33. As a result, a discharge tube 34 does not work although a contact 28 for synchronizing is turned on.
JP55144801A 1980-10-15 1980-10-15 Flash device Pending JPS5767918A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP55144801A JPS5767918A (en) 1980-10-15 1980-10-15 Flash device
GB8130862A GB2088157A (en) 1980-10-15 1981-10-13 Electric Flash Device
NL8104680A NL8104680A (en) 1980-10-15 1981-10-14 ELECTRIC FLASHING DEVICE.
DE19813140828 DE3140828A1 (en) 1980-10-15 1981-10-14 ELECTRICAL FLASH UNIT
FR8119358A FR2492211A1 (en) 1980-10-15 1981-10-14 ELECTRIC LIGHT-LIGHT GENERATING APPARATUS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55144801A JPS5767918A (en) 1980-10-15 1980-10-15 Flash device

Publications (1)

Publication Number Publication Date
JPS5767918A true JPS5767918A (en) 1982-04-24

Family

ID=15370773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55144801A Pending JPS5767918A (en) 1980-10-15 1980-10-15 Flash device

Country Status (5)

Country Link
JP (1) JPS5767918A (en)
DE (1) DE3140828A1 (en)
FR (1) FR2492211A1 (en)
GB (1) GB2088157A (en)
NL (1) NL8104680A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530550A (en) * 1982-09-13 1985-07-23 Olympus Optical Company Ltd. Power supply unit for electronic flash
US4613847A (en) * 1983-08-08 1986-09-23 Life Light Systems Emergency signal

Also Published As

Publication number Publication date
GB2088157A (en) 1982-06-03
NL8104680A (en) 1982-05-03
FR2492211A1 (en) 1982-04-16
FR2492211B3 (en) 1983-08-19
DE3140828A1 (en) 1982-07-15

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