JPS5577727A - Aperture control mechanism of camera - Google Patents
Aperture control mechanism of cameraInfo
- Publication number
- JPS5577727A JPS5577727A JP15837879A JP15837879A JPS5577727A JP S5577727 A JPS5577727 A JP S5577727A JP 15837879 A JP15837879 A JP 15837879A JP 15837879 A JP15837879 A JP 15837879A JP S5577727 A JPS5577727 A JP S5577727A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- variable resistor
- time
- resistance value
- ratchet wheel
- 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)
- Diaphragms For Cameras (AREA)
Abstract
PURPOSE: To perform accurate exposure control by cooperating an aperture adjusting device to an aperture preset mechanism and providing an aperture information signal generating member.
CONSTITUTION: An arm 32 provided with a brush 136 sliding on a variable resistor 37 for operating exposure second time at one end is fitted to a sector gear 15 by way of an axis 10 and a signal lever 36 engaging with the pin 38' of an aperture preset ring 38 of an interchangeable lens at one end is provided by way of an axis 33. A pinion 15a integral with a ratchet wheel 15b is intermeshed with a gear 18 and a detent pawl 15d which is controlled by a magent 15e provided in opposition to the ratchet wheel 15b. Then, at the time when the resistance value of the variable resistor 37 changes with the revolution of the sector gear 15, a signal is outputted from an exposure operating circuit I at the balance period of a bridge circuit, by which the suction of the magnet 15e is released and the ratchet wheel 15b is stopped, thus the resistance value of the variable resistor 37 becomes a correct aperture resistance value. At the same time, a memory switch S3 goes OFF and the brightness of the subject and the film sensitivity are stored in a capacitor C, whereby the set second time of the variable resistor 52' is corrected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15837879A JPS5577727A (en) | 1979-12-05 | 1979-12-05 | Aperture control mechanism of camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15837879A JPS5577727A (en) | 1979-12-05 | 1979-12-05 | Aperture control mechanism of camera |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP47123633A Division JPS4982336A (en) | 1972-12-09 | 1972-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5577727A true JPS5577727A (en) | 1980-06-11 |
Family
ID=15670387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15837879A Pending JPS5577727A (en) | 1979-12-05 | 1979-12-05 | Aperture control mechanism of camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5577727A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59231522A (en) * | 1983-06-14 | 1984-12-26 | Minolta Camera Co Ltd | Camera equipped with preview device |
JPS6063526A (en) * | 1983-09-19 | 1985-04-11 | Nippon Kogaku Kk <Nikon> | Diaphragm control device of camera |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2133212A1 (en) * | 1970-07-03 | 1972-01-05 | Nippon Kogaku Kk | Camera with automatic control device for exposure |
-
1979
- 1979-12-05 JP JP15837879A patent/JPS5577727A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2133212A1 (en) * | 1970-07-03 | 1972-01-05 | Nippon Kogaku Kk | Camera with automatic control device for exposure |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59231522A (en) * | 1983-06-14 | 1984-12-26 | Minolta Camera Co Ltd | Camera equipped with preview device |
JPS6063526A (en) * | 1983-09-19 | 1985-04-11 | Nippon Kogaku Kk <Nikon> | Diaphragm control device of camera |
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