GB1257052A - - Google Patents

Info

Publication number
GB1257052A
GB1257052A GB1257052DA GB1257052A GB 1257052 A GB1257052 A GB 1257052A GB 1257052D A GB1257052D A GB 1257052DA GB 1257052 A GB1257052 A GB 1257052A
Authority
GB
United Kingdom
Prior art keywords
electromagnet
pulley
drive
aperture
electromagnets
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
Other languages
English (en)
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 filed Critical
Publication of GB1257052A publication Critical patent/GB1257052A/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)
  • Control Of Position Or Direction (AREA)
  • Diaphragms For Cameras (AREA)
GB1257052D 1968-01-11 1969-01-09 Expired GB1257052A (enExample)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69722068A 1968-01-11 1968-01-11
US69721968A 1968-01-11 1968-01-11

Publications (1)

Publication Number Publication Date
GB1257052A true GB1257052A (enExample) 1971-12-15

Family

ID=27105970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257052D Expired GB1257052A (enExample) 1968-01-11 1969-01-09

Country Status (2)

Country Link
FR (1) FR2000153A1 (enExample)
GB (1) GB1257052A (enExample)

Also Published As

Publication number Publication date
DE1901015A1 (de) 1969-08-21
FR2000153A1 (enExample) 1969-08-29
DE1901015B2 (de) 1972-08-03

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees