GB1457603A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1457603A
GB1457603A GB3640474A GB3640474A GB1457603A GB 1457603 A GB1457603 A GB 1457603A GB 3640474 A GB3640474 A GB 3640474A GB 3640474 A GB3640474 A GB 3640474A GB 1457603 A GB1457603 A GB 1457603A
Authority
GB
United Kingdom
Prior art keywords
pulse
counter
pulses
switch
camera
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
GB3640474A
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 GB1457603A publication Critical patent/GB1457603A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
GB3640474A 1973-08-24 1974-08-19 Photographic cameras Expired GB1457603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9500573A JPS5044823A (de) 1973-08-24 1973-08-24

Publications (1)

Publication Number Publication Date
GB1457603A true GB1457603A (en) 1976-12-08

Family

ID=14125797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3640474A Expired GB1457603A (en) 1973-08-24 1974-08-19 Photographic cameras

Country Status (4)

Country Link
JP (1) JPS5044823A (de)
DE (1) DE2440730A1 (de)
FR (1) FR2241799A1 (de)
GB (1) GB1457603A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0740108B2 (ja) * 1984-05-30 1995-05-01 株式会社精工舎 プログラムシヤツタの制御回路

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742826A (en) * 1970-01-07 1973-07-03 Canon Kk Exposure control device

Also Published As

Publication number Publication date
JPS5044823A (de) 1975-04-22
FR2241799A1 (de) 1975-03-21
DE2440730A1 (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