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GB1382016A - Control circuit for a camera shutter - Google Patents

Control circuit for a camera shutter

Info

Publication number
GB1382016A
GB1382016A GB3182173A GB3182173A GB1382016A GB 1382016 A GB1382016 A GB 1382016A GB 3182173 A GB3182173 A GB 3182173A GB 3182173 A GB3182173 A GB 3182173A GB 1382016 A GB1382016 A GB 1382016A
Authority
GB
United Kingdom
Prior art keywords
control circuit
capacitor
camera shutter
july
ammeter
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
GB3182173A
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 GB1382016A publication Critical patent/GB1382016A/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
    • G03B7/081—Analogue circuits
    • G03B7/083—Analogue circuits for control of exposure time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

1382016 Camera exposure control circuit SEIKO KOKI KK 4 July 1973 [10 July 1972] 31821/73 Heading G2A An exposure control circuit comprises a photoconductor R x ', an ammeter A', an integrating capacitor C' and a switch S 2 ' which when closed shorts out the capacitor whereby the ammeter indicates exposure time and when opened allows the capacitor to charge up and operate a shuttercontrolling electromagnet M' via a switching circuit Q'. Fig.3 (not shown) shows an alternative switching arrangement (S 3 S 4 ).
GB3182173A 1972-07-10 1973-07-04 Control circuit for a camera shutter Expired GB1382016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47068842A JPS4929634A (en) 1972-07-10 1972-07-10

Publications (1)

Publication Number Publication Date
GB1382016A true GB1382016A (en) 1975-01-29

Family

ID=13385336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3182173A Expired GB1382016A (en) 1972-07-10 1973-07-04 Control circuit for a camera shutter

Country Status (4)

Country Link
JP (1) JPS4929634A (en)
DE (1) DE2335049A1 (en)
FR (1) FR2192716A5 (en)
GB (1) GB1382016A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5446536U (en) * 1977-09-07 1979-03-31
JPS5451543U (en) * 1977-09-16 1979-04-10

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1472701A1 (en) * 1965-07-09 1969-03-27 Rollei Werke Franke Heidecke Photographic camera with photoelectric exposure time control
AT280771B (en) * 1967-04-26 1970-04-27 Ernst U Wilhelm Bertram Fabrik Exposure control circuit for a photographic shutter

Also Published As

Publication number Publication date
JPS4929634A (en) 1974-03-16
DE2335049A1 (en) 1974-01-31
FR2192716A5 (en) 1974-02-08

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Legal Events

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