GB1102226A - Photoelectric exposure control system for photographic cameras - Google Patents

Photoelectric exposure control system for photographic cameras

Info

Publication number
GB1102226A
GB1102226A GB1512765A GB1512765A GB1102226A GB 1102226 A GB1102226 A GB 1102226A GB 1512765 A GB1512765 A GB 1512765A GB 1512765 A GB1512765 A GB 1512765A GB 1102226 A GB1102226 A GB 1102226A
Authority
GB
United Kingdom
Prior art keywords
exposure control
control system
switch
photographic cameras
photoelectric exposure
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
GB1512765A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1102226A publication Critical patent/GB1102226A/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
    • G03B7/085—Analogue circuits for control of aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

1,102,226. Exposure control. EASTMAN KODAK CO. April 9, 1965 [April 13, 1964], No. 15127 / 65. Heading G2A. A diaphragm vane 26 is actuated by the coil 18 of a measuring instrument connected in parallel across photo-resistor 10 subjected to scene light. The photo-resistor 10 is in series with a battery 14, switch 12, and a resistance 16. Upon closure of switch 12, vane 26 is set by coil 18 to a position in accordance with scene brightness. A flash contact 34 is actuated simultaneously with switch 12 for flash operation.
GB1512765A 1964-04-13 1965-04-09 Photoelectric exposure control system for photographic cameras Expired GB1102226A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35928364A 1964-04-13 1964-04-13

Publications (1)

Publication Number Publication Date
GB1102226A true GB1102226A (en) 1968-02-07

Family

ID=23413146

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1512765A Expired GB1102226A (en) 1964-04-13 1965-04-09 Photoelectric exposure control system for photographic cameras

Country Status (1)

Country Link
GB (1) GB1102226A (en)

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