GB737275A - Improvements in or relating to cinematograph or television cameras - Google Patents

Improvements in or relating to cinematograph or television cameras

Info

Publication number
GB737275A
GB737275A GB2912252A GB2912252A GB737275A GB 737275 A GB737275 A GB 737275A GB 2912252 A GB2912252 A GB 2912252A GB 2912252 A GB2912252 A GB 2912252A GB 737275 A GB737275 A GB 737275A
Authority
GB
United Kingdom
Prior art keywords
contacts
shutter
motor
pointer
relays
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
GB2912252A
Inventor
Edith Jessie Langley
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.)
WESTMINSTER FILMS Ltd
Original Assignee
WESTMINSTER FILMS Ltd
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 WESTMINSTER FILMS Ltd filed Critical WESTMINSTER FILMS Ltd
Priority to GB2912252A priority Critical patent/GB737275A/en
Publication of GB737275A publication Critical patent/GB737275A/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
    • 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
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

737,275. Electric control systems. WESTMINSTER FILMS, Ltd. Nov. 18, 1953 [Nov. 18, 1952], No. 29122/62. Class 40 (1). [Also in Group XL (b)] In a cine or television camera the amount of light passing through the shutter is automatically controlled by a photoelectric cell in accordance with light intensity. The invention is described with reference to controlling the opening of a conventional cine-camera shutter of the type in which a pair of constantly rotating semicircular plates 1, la are adjusted relatively to each other. The spacing of the two leaves is adjusted by a geared motor 8. In operation, deflection of the pointer of a photo-electric exposure meter 9 closes it with one of a pair of contacts 11, thus energizing the appropriate one of relays 16. Motor 8 is thereby energized and varies the shutter spacing at the same time repositioning through the screwed shaft 13 a block carrying the contacts 11, the adjustment ceasing when the pointer is positioned between the two contacts. An adjustable coupling 15 between screwed shaft 13 and motor 8 enables the block to be positioned initially. In the case of a television camera the motor may adjust an iris shutter. In the arrangement of Fig. 2 (not shown), the meter is clamped so that the pointer moves in a horizontal plane, the contacts 11 being arranged as shown in Fig. I so that the pointer moves between them. The Specification states that the photo-cell may control the relays by electronic means.
GB2912252A 1952-11-18 1952-11-18 Improvements in or relating to cinematograph or television cameras Expired GB737275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2912252A GB737275A (en) 1952-11-18 1952-11-18 Improvements in or relating to cinematograph or television cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2912252A GB737275A (en) 1952-11-18 1952-11-18 Improvements in or relating to cinematograph or television cameras

Publications (1)

Publication Number Publication Date
GB737275A true GB737275A (en) 1955-09-21

Family

ID=10286505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2912252A Expired GB737275A (en) 1952-11-18 1952-11-18 Improvements in or relating to cinematograph or television cameras

Country Status (1)

Country Link
GB (1) GB737275A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152687A (en) * 1983-12-16 1985-08-07 Nisus Video Inc Video camera shutter
US4545659A (en) * 1983-12-16 1985-10-08 Nisus Video Incorporated Device for continuously varying the shutter speed of a video tape camera
US4547051A (en) * 1983-12-16 1985-10-15 Nisus Video Incorporated Shutter for a video tape camera
US4551763A (en) * 1983-12-16 1985-11-05 Nisus Video Incorporated Diagonal sweep shutter mechanism for video tape camera
US5119191A (en) * 1990-05-30 1992-06-02 Panavision International, L.P. Flicker processor for cinema video assist

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152687A (en) * 1983-12-16 1985-08-07 Nisus Video Inc Video camera shutter
US4545659A (en) * 1983-12-16 1985-10-08 Nisus Video Incorporated Device for continuously varying the shutter speed of a video tape camera
US4547051A (en) * 1983-12-16 1985-10-15 Nisus Video Incorporated Shutter for a video tape camera
US4551763A (en) * 1983-12-16 1985-11-05 Nisus Video Incorporated Diagonal sweep shutter mechanism for video tape camera
US5119191A (en) * 1990-05-30 1992-06-02 Panavision International, L.P. Flicker processor for cinema video assist

Similar Documents

Publication Publication Date Title
GB1313346A (en) Photographic exposure control apparatus
US2163737A (en) Automatic diaphragm working by means of a photoelectric cell, a light-sensitive element, or the like
GB737275A (en) Improvements in or relating to cinematograph or television cameras
US3120161A (en) Diaphragm controlling system
GB1161744A (en) Improvements relating to photometers for use in photographic cameras
GB856110A (en) Improvements in or relating to photographic and cinematographic cameras
GB491410A (en) Exposure controlling device for kinematograph or photographic cameras
GB988597A (en) Improvements in or relating to cinematographic cameras
US2953964A (en) Equalizing illumination across projected image and between parts of mosaic picture
SE319080B (en)
GB1080388A (en) Automatic exposure control apparatus for cameras
GB1464769A (en) Automaitc exposure control systems and light metering systems for cameras
GB1064043A (en) Device and arrangement relating to cinematograph cameras and method of taking cinematograph film
US3073220A (en) Exposure control device for a photographic camera
GB1096268A (en) Improvements in or relating to photographic or cinematographic cameras
US3057279A (en) Automatic control device for lens diaphragm
GB1201236A (en) Improvements in or relating to photoflash exposure control systems
GB983762A (en) Flat screen campimeters
AT208215B (en) Iris control for photographic or cinematographic apparatus
GB779945A (en) Improvements in or relating to cinematograph or television cameras
US3074336A (en) Diaphragm devices for photographic or cinematographic cameras
GB1006145A (en) An apparatus for automatically adjusting the exposure aperture in cameras
GB638831A (en) Improvements in or relating to step-contact film-printing machine
SU84233A1 (en) The method of controlling and maintaining remote-controlled shooting
GB882009A (en) Improvements in or relating to motion picture cameras having automatic exposure control means