JPS55108637A - Electric shutter for camera - Google Patents

Electric shutter for camera

Info

Publication number
JPS55108637A
JPS55108637A JP1655679A JP1655679A JPS55108637A JP S55108637 A JPS55108637 A JP S55108637A JP 1655679 A JP1655679 A JP 1655679A JP 1655679 A JP1655679 A JP 1655679A JP S55108637 A JPS55108637 A JP S55108637A
Authority
JP
Japan
Prior art keywords
circuit
shutter
supply voltage
power source
voltage
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
JP1655679A
Other languages
Japanese (ja)
Inventor
Katsuhiko Tsunefuji
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.)
Olympus Corp
Original Assignee
Olympus 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP1655679A priority Critical patent/JPS55108637A/en
Publication of JPS55108637A publication Critical patent/JPS55108637A/en
Pending legal-status Critical Current

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Landscapes

  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To prevent under-exposure by changing the decision level of a supply voltage decision circuit after shutter start.
CONSTITUTION: A power source holding circuit PS, supply voltage decision circuit VC, delay circuit AS for auto-self, magnet starting circuit SR for shutter release, photometry control circuit EC and a magnet start circuit SC for controlling shutter closing are subsequently connected to an electric shutter start control circuit ES. As a result of this, the voltage of the power source E is checked immediate before photographing by the supply voltage decision circuit VC and when said voltage is above the reference voltage value and after the shutter is once release, the reference voltage value of the supply voltage decision circuit VC is changed to zero volt and even if the voltage of the power source E drops during photographing, the supply voltage decision circuit VC does not detect this and causes the electric shutter circuit to operate normally, whereby ordinary exposure photographing is accomplished. Hence, even if the voltage of the power source E is unstable, under-exposure does not occur.
COPYRIGHT: (C)1980,JPO&Japio
JP1655679A 1979-02-14 1979-02-14 Electric shutter for camera Pending JPS55108637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1655679A JPS55108637A (en) 1979-02-14 1979-02-14 Electric shutter for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1655679A JPS55108637A (en) 1979-02-14 1979-02-14 Electric shutter for camera

Publications (1)

Publication Number Publication Date
JPS55108637A true JPS55108637A (en) 1980-08-21

Family

ID=11919548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1655679A Pending JPS55108637A (en) 1979-02-14 1979-02-14 Electric shutter for camera

Country Status (1)

Country Link
JP (1) JPS55108637A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155534U (en) * 1981-03-26 1982-09-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155534U (en) * 1981-03-26 1982-09-30

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