JPS56130730A - Flash device - Google Patents

Flash device

Info

Publication number
JPS56130730A
JPS56130730A JP3494480A JP3494480A JPS56130730A JP S56130730 A JPS56130730 A JP S56130730A JP 3494480 A JP3494480 A JP 3494480A JP 3494480 A JP3494480 A JP 3494480A JP S56130730 A JPS56130730 A JP S56130730A
Authority
JP
Japan
Prior art keywords
oscillation
turned
switch
transistor
power
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
JP3494480A
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 JP3494480A priority Critical patent/JPS56130730A/en
Priority to GB8108339A priority patent/GB2074800A/en
Priority to IT48051/81A priority patent/IT1142353B/en
Priority to NL8101331A priority patent/NL8101331A/en
Priority to FR8105416A priority patent/FR2478934A1/en
Priority to DE19813110589 priority patent/DE3110589A1/en
Publication of JPS56130730A publication Critical patent/JPS56130730A/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 prevent the consumption of a power battery with a power switch left turned on and to avoid damage due to liquid leakage, by automatically controlling oscillation by providing a means of stopping the functions of an oscillating element a certain time after the start of the oscillation. CONSTITUTION:With switch 11 turned off, no signal is applied to the base circuit of transistor 7 for oscillation, so that an oscillating circuit is turned off. With switch 11 turned on, charge from power source 1 is accumulated in capacitor 15 for oscillation control via switch 11 and diode 13, and consequently transistor 7 turns on to start oscillation. The time when transistor 7 continues to oscillate is set depending upon the time constant of semifixed resistance 14 and capacitor 15, and a prescribed time after the start of the oscillation, the oscillation stops, so that the consumption of the power battery with the power switch left turned on can be prevented.
JP3494480A 1980-03-19 1980-03-19 Flash device Pending JPS56130730A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP3494480A JPS56130730A (en) 1980-03-19 1980-03-19 Flash device
GB8108339A GB2074800A (en) 1980-03-19 1981-03-17 Flash discharge lamp circuit
IT48051/81A IT1142353B (en) 1980-03-19 1981-03-18 IMPROVEMENT IN ELECTRONIC FLASHING DEVICES
NL8101331A NL8101331A (en) 1980-03-19 1981-03-18 ELECTRICAL FLASHING DEVICE.
FR8105416A FR2478934A1 (en) 1980-03-19 1981-03-18 LIGHTNING GENERATING DEVICE
DE19813110589 DE3110589A1 (en) 1980-03-19 1981-03-18 ELECTRICAL FLASH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3494480A JPS56130730A (en) 1980-03-19 1980-03-19 Flash device

Publications (1)

Publication Number Publication Date
JPS56130730A true JPS56130730A (en) 1981-10-13

Family

ID=12428276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3494480A Pending JPS56130730A (en) 1980-03-19 1980-03-19 Flash device

Country Status (6)

Country Link
JP (1) JPS56130730A (en)
DE (1) DE3110589A1 (en)
FR (1) FR2478934A1 (en)
GB (1) GB2074800A (en)
IT (1) IT1142353B (en)
NL (1) NL8101331A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310262C2 (en) * 1982-04-22 1986-12-11 Metz Apparatewerke Inh. Paul Metz, 8510 Fürth Electronic flash unit with automatically switching off voltage converter
GB2133644A (en) * 1983-01-14 1984-07-25 Fuji Koeki Corp Photographic flash apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE284199C (en) *
US3644818A (en) * 1971-03-10 1972-02-22 Gte Sylvania Inc Electronic flashlamp power supply
US3863128A (en) * 1973-07-30 1975-01-28 Honeywell Inc Voltage monitoring controlling and protecting apparatus employing programmable unijunction transistor
JPS5136934A (en) * 1974-09-24 1976-03-29 Canon Kk
JPS59957B2 (en) * 1976-11-09 1984-01-09 株式会社セコ−技研 electronic light emitter

Also Published As

Publication number Publication date
IT1142353B (en) 1986-10-08
IT8148051A0 (en) 1981-03-18
FR2478934A1 (en) 1981-09-25
NL8101331A (en) 1981-10-16
GB2074800A (en) 1981-11-04
DE3110589A1 (en) 1982-03-11

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