GB1463859A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1463859A
GB1463859A GB3678874A GB3678874A GB1463859A GB 1463859 A GB1463859 A GB 1463859A GB 3678874 A GB3678874 A GB 3678874A GB 3678874 A GB3678874 A GB 3678874A GB 1463859 A GB1463859 A GB 1463859A
Authority
GB
United Kingdom
Prior art keywords
count
counter
shutter
pulses
closed
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
GB3678874A
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 GB1463859A publication Critical patent/GB1463859A/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)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Stroboscope Apparatuses (AREA)
GB3678874A 1973-08-24 1974-08-21 Photographic cameras Expired GB1463859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48095004A JPS5044822A (ja) 1973-08-24 1973-08-24

Publications (1)

Publication Number Publication Date
GB1463859A true GB1463859A (en) 1977-02-09

Family

ID=14125750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3678874A Expired GB1463859A (en) 1973-08-24 1974-08-21 Photographic cameras

Country Status (4)

Country Link
JP (1) JPS5044822A (ja)
DE (1) DE2440731A1 (ja)
FR (1) FR2241804B1 (ja)
GB (1) GB1463859A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917920A1 (de) * 1978-05-04 1979-11-08 Olympus Optical Co Informationsanzeige - vorrichtung fuer kameras

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5110981B2 (ja) * 1971-08-30 1976-04-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917920A1 (de) * 1978-05-04 1979-11-08 Olympus Optical Co Informationsanzeige - vorrichtung fuer kameras

Also Published As

Publication number Publication date
DE2440731A1 (de) 1975-03-06
FR2241804A1 (ja) 1975-03-21
JPS5044822A (ja) 1975-04-22
FR2241804B1 (ja) 1982-03-05

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Legal Events

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