JPS59214831A - Strobe device - Google Patents

Strobe device

Info

Publication number
JPS59214831A
JPS59214831A JP58089723A JP8972383A JPS59214831A JP S59214831 A JPS59214831 A JP S59214831A JP 58089723 A JP58089723 A JP 58089723A JP 8972383 A JP8972383 A JP 8972383A JP S59214831 A JPS59214831 A JP S59214831A
Authority
JP
Japan
Prior art keywords
flash
thyristor
turn
lighting
resistances
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
JP58089723A
Other languages
Japanese (ja)
Inventor
Shinji Hirata
Original Assignee
West Electric Co 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 West Electric Co Ltd filed Critical West Electric Co Ltd
Priority to JP58089723A priority Critical patent/JPS59214831A/en
Publication of JPS59214831A publication Critical patent/JPS59214831A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05Combinations of cameras with electronic flash apparatus; Electronic flash units
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2215/00Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05Combinations of cameras with electronic flash units

Abstract

PURPOSE:To reset securely the thyristor in a multiple flash device to the off state as lighting operation is carried out by providing a bypassing switch element which turns on with the output of a lighting operation detecting circuit and allow a current to bypass the circuit between synchro terminals. CONSTITUTION:When a flash discharge bulb 4 emits light, the capacitor 11 of the lighting detecting circuit 10 is discharged through the flash discharge bulb 4, a low-voltage power source 1, and resistances 14 and 13 to turn on a transistor (TR) 12, generating a voltage drop across resistances 15 and 16 as an output. The TR17 as the bypass switch element turns on and the current flowing through a diode 19 and synchro terminals 18 so far flows through the collector and emitter, so that the current supplied to the thyristor 27 in the multiple flash device 25 connected between the synchro terminals 18 is ceased. Consequently, such a trouble point that the thyristor in the multiple flash device stays on and can not turn off like a multiple flash device stays on and can not turn off like a conventional device is eliminated.
JP58089723A 1983-05-20 1983-05-20 Strobe device Pending JPS59214831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58089723A JPS59214831A (en) 1983-05-20 1983-05-20 Strobe device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58089723A JPS59214831A (en) 1983-05-20 1983-05-20 Strobe device

Publications (1)

Publication Number Publication Date
JPS59214831A true JPS59214831A (en) 1984-12-04

Family

ID=13978679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58089723A Pending JPS59214831A (en) 1983-05-20 1983-05-20 Strobe device

Country Status (1)

Country Link
JP (1) JPS59214831A (en)

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