GB1477875A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1477875A
GB1477875A GB3480074A GB3480074A GB1477875A GB 1477875 A GB1477875 A GB 1477875A GB 3480074 A GB3480074 A GB 3480074A GB 3480074 A GB3480074 A GB 3480074A GB 1477875 A GB1477875 A GB 1477875A
Authority
GB
United Kingdom
Prior art keywords
pulses
counter
circuit
shutter
pass
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
GB3480074A
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 GB1477875A publication Critical patent/GB1477875A/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)
  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
GB3480074A 1973-08-24 1974-08-07 Photographic cameras Expired GB1477875A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9500773A JPS5631572B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-08-24 1973-08-24

Publications (1)

Publication Number Publication Date
GB1477875A true GB1477875A (en) 1977-06-29

Family

ID=14125868

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3480074A Expired GB1477875A (en) 1973-08-24 1974-08-07 Photographic cameras

Country Status (5)

Country Link
US (1) US4025929A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5631572B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2440638C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2241801B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1477875A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250722A (en) * 1975-10-21 1977-04-23 Canon Inc Circuit system for preventing erroneous operation of camera
JPS5294127A (en) * 1976-02-04 1977-08-08 Canon Inc Bulb shooting control system for electronic shutter camera
US4306785A (en) * 1979-02-01 1981-12-22 Asahi Kogaku Kogyo Kabushiki Kaisha Camera exposure time control circuit
JPS60189564U (ja) * 1984-05-28 1985-12-16 ロ−ム株式会社 メツキ装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1217779B (de) * 1964-04-10 1966-05-26 Compur Werk Gmbh & Co Schaltanordnung zur elektrischen Steuerung der Belichtungszeit eines Kameraverschlusses
US3748979A (en) * 1970-12-28 1973-07-31 Copal Co Ltd Electronic shutter apparatus for cameras
US3836262A (en) * 1971-07-07 1974-09-17 Minolta Camera Kk Indicator circuit
JPS4831941A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1971-08-27 1973-04-26
US3827065A (en) * 1971-08-30 1974-07-30 Copal Co Ltd Warning circuit of an electric shutter
DE2220204C2 (de) * 1972-04-25 1974-05-16 Labtronic Ag Gesellschaft Fuer Klinische Labortechnik, Zuerich (Schweiz) Photometer zur digitalen Anzeige der Konzentration einer Meßprobe in einer Küvette
JPS532567B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-09-20 1978-01-30

Also Published As

Publication number Publication date
JPS5045631A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-04-23
DE2440638C3 (de) 1980-07-10
DE2440638A1 (de) 1975-03-06
US4025929A (en) 1977-05-24
FR2241801A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-03-21
FR2241801B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-08-11
DE2440638B2 (de) 1979-10-04
JPS5631572B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1981-07-22

Similar Documents

Publication Publication Date Title
US3748979A (en) Electronic shutter apparatus for cameras
GB1474607A (en) Camera data recording system
GB1486669A (en) Photographic cameras
GB1477875A (en) Photographic cameras
DE2329065B2 (de) Elektronischer Verschluß für eine fotografische Kamera
GB1521288A (en) Cine cameras
JPS52127429U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB1292053A (en) Photographic exposure control arrangement
GB1486667A (en) Photographic cameras
US3832723A (en) Exposure control device for photographic cameras
DE2351875A1 (de) Belichtungszeitsteuerschaltung fuer eine kamera
GB1517723A (en) Camera exposure control systems
GB1485530A (en) Photographic cameras
DE1522056A1 (de) Photographische Kamera
DE3015055A1 (de) Belichtungssteuerschaltung
GB1479705A (en) Photographic cameras
GB1123579A (en) Device for automatic regulation of a photographic exposure
GB1530616A (en) Device for indicating digitally a photographic exposure parameter
GB1273031A (en) Exposure control system for a camera
DE2927120A1 (de) Elektronische steuerschaltung fuer einen kameraverschluss
GB1321628A (en) Exposure quantity control device for a camera
DE3145048C2 (de) Einrichtung zur Lichtmengensteuerung für ein elektronisches Blitzsystem
GB1457603A (en) Photographic cameras
DE2746263C3 (de) Fotografische Kamera mit automatischer Belichtungszeitsteuerung und angeschlossenem automatischem elektronischem elektronischem Blitzlichtgerät
GB1402293A (en) Apparatus for indicating exposure conditions of cameras equipped with electric shutter mechanisms

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee