JPS55108637A - Electric shutter for camera - Google Patents
Electric shutter for cameraInfo
- 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
Links
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57155534U (en) * | 1981-03-26 | 1982-09-30 |
-
1979
- 1979-02-14 JP JP1655679A patent/JPS55108637A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57155534U (en) * | 1981-03-26 | 1982-09-30 |
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