GB1063775A - Photographic camera - Google Patents

Photographic camera

Info

Publication number
GB1063775A
GB1063775A GB1064064A GB1064064A GB1063775A GB 1063775 A GB1063775 A GB 1063775A GB 1064064 A GB1064064 A GB 1064064A GB 1064064 A GB1064064 A GB 1064064A GB 1063775 A GB1063775 A GB 1063775A
Authority
GB
United Kingdom
Prior art keywords
battery
deflection
galvanometer
photo
scale
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
GB1064064A
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
Priority claimed from US265673A external-priority patent/US3232193A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1063775A publication Critical patent/GB1063775A/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
    • G03B7/26—Power supplies; Circuitry or arrangement to switch on the power source; Circuitry to check the power source voltage
    • 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
    • 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
    • G03B7/10—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 a servo-motor providing energy to move the setting member

Abstract

1,063,775. Photographic cameras; exposure control systems. EASTMAN KODAK CO. March 13, 1964 [March 18, 1963 (2)], No.10640/64. Addition to 970, 289. Heading G2A. A camera has a photo-electric exposure control system including a galvanometer 11 whose moving element 13 is deflectable in a first direction as a function of the scene light intensity illuminating the photo-electric element 10, and a switch 12 for coupling the galvanometer for voltage testing purposes to a battery 18 which gives a deflection in an opposite second direction against an opposing spring. Resistor 19 represents the load at camera drive motor 20 which is connected to the battery by trigger switch 21, and resistors 22, 23 are used to adjust the galvanometer deflection. Member 13 has an aperture diaphragm vane 29 at one end and, at the other end, a scale 25 provided with exposure indicia 27 and battery potential indicia 28 corresponding to deflection in the two opposite directions against a fixed mark. Scale 25 projects into the axis 32 at the viewfinder. Alternatively, the scale may be fixed while the meter 11 has a moving pointer with a snap-action spring-loading giving a sudden increase in deflection if the battery potential enters the "GOOD" range. A magnetic spring arm is used for this purpose. In a modification, the battery is tested without disconnecting the photo-electric element whose small output is negligible by comparison with that of the battery and is over-ridden. The opposite deflection during battery testing is made against resisting spring means which may be helical, spiral, a cantilever, thereby decreasing the galvanometer sensitivity.
GB1064064A 1963-03-18 1964-03-13 Photographic camera Expired GB1063775A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26576063A 1963-03-18 1963-03-18
US265673A US3232193A (en) 1963-03-18 1963-03-18 Camera battery test indicator

Publications (1)

Publication Number Publication Date
GB1063775A true GB1063775A (en) 1967-03-30

Family

ID=26951362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1064064A Expired GB1063775A (en) 1963-03-18 1964-03-13 Photographic camera

Country Status (1)

Country Link
GB (1) GB1063775A (en)

Similar Documents

Publication Publication Date Title
US3703130A (en) Electronic shutter control device
US3815982A (en) Motion picture fade-out and fade-in arrangement using a fluid crystal
US3147680A (en) Photographic light measuring device
US3227056A (en) Battery testing device
US2358083A (en) Exposure control device
US3594088A (en) Optimum or under or over exposure-indicating device for use in photography
GB1063775A (en) Photographic camera
GB1034395A (en) A cinematographic camera and a film-sensitivity control device therefor
US4455071A (en) Light measuring instrument for a single lens reflex camera
US3232193A (en) Camera battery test indicator
US3200720A (en) Arrangement for checking the battery voltage of an electrically driven film camera
US3964076A (en) Shutter speed display devices for electric shutter operating circuits
US3888594A (en) Exposure control computing circuit
GB1029923A (en) Cameras
US3238454A (en) Overload protection circuit for mirror galvanometer using photoconductive cells to shunt overload current
GB1072349A (en) A camera flash circuit
US3227057A (en) Camera battery test indicator
US3804520A (en) Photometric indication circuit for battery checking
US3664244A (en) Indicating apparatus for exposure control apparatus
US3973267A (en) Exposure control apparatus for a camera
US3093043A (en) Photographic camera with electrical exposure meter
US3009403A (en) Photographic cameras
US3833912A (en) Exposure control system for a single lens reflex camera
US2433648A (en) Spring controlled index registering photoelectric exposure meter
GB1354811A (en) Electric shutter control system for a camera