JPS55124122A - High-speed shutter limiter of electric shutter - Google Patents
High-speed shutter limiter of electric shutterInfo
- Publication number
- JPS55124122A JPS55124122A JP1562779A JP1562779A JPS55124122A JP S55124122 A JPS55124122 A JP S55124122A JP 1562779 A JP1562779 A JP 1562779A JP 1562779 A JP1562779 A JP 1562779A JP S55124122 A JPS55124122 A JP S55124122A
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- travel
- level
- trigger signal
- rear curtain
- 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
Abstract
PURPOSE: To stabilize operations by supplying the shutter high-speed limit signal to control circuits by the semiconductor gate switches operated by the trigger signal generated in response to shutter release, etc.
CONSTITUTION: Transmission gate switches T1, T2 are turned ON and OFF respectively by the trigger signal of the H level generated by film-winding and the output of a NOR gate IC5 become of L level to stop travel of the rear curtain. Next, when the travel of the front curtain is started as the release button is pushed, the trigger signal becomes of L level, causing the travel of the rear curtain to start. On the other hand, when the transmission gate switch T1 goes OFF, the input of an inverter IC2 goes through a time constant circuit R3 and C1 and after the delay time corresponding to the time constant of the circuit, it inverts the output of the inverter IC4 from H to L level, thereby controlling the travel of the rear curtain. This delay time shows the limit of the high-speed shutter. By using the electronic circuits such as delay circuit in this way, the operations may be stabilized.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1562779A JPS55124122A (en) | 1979-02-14 | 1979-02-14 | High-speed shutter limiter of electric shutter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1562779A JPS55124122A (en) | 1979-02-14 | 1979-02-14 | High-speed shutter limiter of electric shutter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55124122A true JPS55124122A (en) | 1980-09-25 |
Family
ID=11893942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1562779A Pending JPS55124122A (en) | 1979-02-14 | 1979-02-14 | High-speed shutter limiter of electric shutter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55124122A (en) |
-
1979
- 1979-02-14 JP JP1562779A patent/JPS55124122A/en active Pending
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