GB1459920A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1459920A
GB1459920A GB3288374A GB3288374A GB1459920A GB 1459920 A GB1459920 A GB 1459920A GB 3288374 A GB3288374 A GB 3288374A GB 3288374 A GB3288374 A GB 3288374A GB 1459920 A GB1459920 A GB 1459920A
Authority
GB
United Kingdom
Prior art keywords
shutter
signal
count
produced
capacitor
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.)
Expired
Application number
GB3288374A
Other languages
English (en)
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.)
Seiko Koki KK
Original Assignee
Seiko Koki KK
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 Seiko Koki KK filed Critical Seiko Koki KK
Publication of GB1459920A publication Critical patent/GB1459920A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/091—Digital circuits
    • G03B7/093—Digital circuits for control of exposure time
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Shutters For Cameras (AREA)
  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
GB3288374A 1973-08-24 1974-07-25 Photographic cameras Expired GB1459920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48095006A JPS5045628A (enrdf_load_stackoverflow) 1973-08-24 1973-08-24

Publications (1)

Publication Number Publication Date
GB1459920A true GB1459920A (en) 1976-12-31

Family

ID=14125834

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3288374A Expired GB1459920A (en) 1973-08-24 1974-07-25 Photographic cameras

Country Status (4)

Country Link
JP (1) JPS5045628A (enrdf_load_stackoverflow)
DE (1) DE2440679A1 (enrdf_load_stackoverflow)
FR (1) FR2241800A1 (enrdf_load_stackoverflow)
GB (1) GB1459920A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3226917B2 (ja) * 1990-10-16 2001-11-12 本田技研工業株式会社 電動モータ付き車両におけるバッテリー残容量表示方法
CN104503201A (zh) * 2014-12-19 2015-04-08 中国科学院长春光学精密机械与物理研究所 一种帘幕式快门的帘幕宽度、运动速度测量装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748979A (en) * 1970-12-28 1973-07-31 Copal Co Ltd Electronic shutter apparatus for cameras
JPS5110981B2 (enrdf_load_stackoverflow) * 1971-08-30 1976-04-08

Also Published As

Publication number Publication date
JPS5045628A (enrdf_load_stackoverflow) 1975-04-23
FR2241800A1 (enrdf_load_stackoverflow) 1975-03-21
DE2440679A1 (de) 1975-03-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee