JPS5474420A - Strobo flash preventing circuit - Google Patents

Strobo flash preventing circuit

Info

Publication number
JPS5474420A
JPS5474420A JP14130177A JP14130177A JPS5474420A JP S5474420 A JPS5474420 A JP S5474420A JP 14130177 A JP14130177 A JP 14130177A JP 14130177 A JP14130177 A JP 14130177A JP S5474420 A JPS5474420 A JP S5474420A
Authority
JP
Japan
Prior art keywords
multivibrator
trigger circuit
capacitor
main capacitor
synchro
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
JP14130177A
Other languages
Japanese (ja)
Inventor
Saburo Numata
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP14130177A priority Critical patent/JPS5474420A/en
Publication of JPS5474420A publication Critical patent/JPS5474420A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stroboscope Apparatuses (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To emit a sufficient quantity of light from a strobo thereby to prevent defficiency in exposure by operating a trigger circuit, only when the charging operation of a main capacitor is finished, so that the flash bulb may be lit. CONSTITUTION:The end of the charging operation of a main capacitor 3 is detected to render a monostable multivibrator 22 operative and to feed the signals of a synchro-contact 24 from the multivibrator 22 to a trigger circuit 14. As a result, the main capacitor 3 is charged with the voltage which is boosted by the operations of a main switch 11. When the capacitor 3 is charged to a preset level, a neon tube 17 is lit. Thus, a switching transistor 23 is turned on to render the multivibrator 22 operative. When a shutter is released to close the synchro-contact 24, the multivibrator 22 is operated to drive the trigger circuit 14 thereby to light the flash bulb 15.
JP14130177A 1977-11-25 1977-11-25 Strobo flash preventing circuit Pending JPS5474420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14130177A JPS5474420A (en) 1977-11-25 1977-11-25 Strobo flash preventing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14130177A JPS5474420A (en) 1977-11-25 1977-11-25 Strobo flash preventing circuit

Publications (1)

Publication Number Publication Date
JPS5474420A true JPS5474420A (en) 1979-06-14

Family

ID=15288692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14130177A Pending JPS5474420A (en) 1977-11-25 1977-11-25 Strobo flash preventing circuit

Country Status (1)

Country Link
JP (1) JPS5474420A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5640814A (en) * 1979-09-11 1981-04-17 Minolta Camera Co Ltd Electronic flash device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525644U (en) * 1975-06-24 1977-01-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525644U (en) * 1975-06-24 1977-01-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5640814A (en) * 1979-09-11 1981-04-17 Minolta Camera Co Ltd Electronic flash device

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