GB2274923B - Iris arrangement - Google Patents

Iris arrangement

Info

Publication number
GB2274923B
GB2274923B GB9302178A GB9302178A GB2274923B GB 2274923 B GB2274923 B GB 2274923B GB 9302178 A GB9302178 A GB 9302178A GB 9302178 A GB9302178 A GB 9302178A GB 2274923 B GB2274923 B GB 2274923B
Authority
GB
United Kingdom
Prior art keywords
iris arrangement
iris
arrangement
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 - Fee Related
Application number
GB9302178A
Other versions
GB9302178D0 (en
GB2274923A (en
Inventor
Ian Graham Thom
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.)
Leonardo MW Ltd
Original Assignee
GEC Ferranti Defence Systems Ltd
GEC Marconi Avionics Holdings 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 GEC Ferranti Defence Systems Ltd, GEC Marconi Avionics Holdings Ltd filed Critical GEC Ferranti Defence Systems Ltd
Priority to GB9302178A priority Critical patent/GB2274923B/en
Publication of GB9302178D0 publication Critical patent/GB9302178D0/en
Priority to JP1222594A priority patent/JPH075520A/en
Publication of GB2274923A publication Critical patent/GB2274923A/en
Application granted granted Critical
Publication of GB2274923B publication Critical patent/GB2274923B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/03—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with a closure member in the form of an iris-diaphragm
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • 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
    • G03B9/02—Diaphragms
    • G03B9/06—Two or more co-operating pivoted blades, e.g. iris type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms For Cameras (AREA)
GB9302178A 1993-02-04 1993-02-04 Iris arrangement Expired - Fee Related GB2274923B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9302178A GB2274923B (en) 1993-02-04 1993-02-04 Iris arrangement
JP1222594A JPH075520A (en) 1993-02-04 1994-01-10 Diaphragm structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9302178A GB2274923B (en) 1993-02-04 1993-02-04 Iris arrangement

Publications (3)

Publication Number Publication Date
GB9302178D0 GB9302178D0 (en) 1993-03-24
GB2274923A GB2274923A (en) 1994-08-10
GB2274923B true GB2274923B (en) 1996-07-10

Family

ID=10729828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9302178A Expired - Fee Related GB2274923B (en) 1993-02-04 1993-02-04 Iris arrangement

Country Status (2)

Country Link
JP (1) JPH075520A (en)
GB (1) GB2274923B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111255904A (en) * 2020-02-20 2020-06-09 金陵科技学院 Section-adjustable flow limiting valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107727541B (en) * 2017-10-31 2023-08-08 中国石油大学(北京) Device and method for monitoring aerosol in pipeline and pipeline system
CN111140890B (en) * 2018-11-06 2023-01-17 博西华电器（江苏）有限公司 Smoke pipe base and smoke exhaust ventilator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443006A (en) * 1934-11-01 1936-02-19 Leitz Ernst Gmbh Improvements in or relating to iris diaphragms
EP0372932A2 (en) * 1988-12-08 1990-06-13 Nikon Corporation Diaphragm device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443006A (en) * 1934-11-01 1936-02-19 Leitz Ernst Gmbh Improvements in or relating to iris diaphragms
EP0372932A2 (en) * 1988-12-08 1990-06-13 Nikon Corporation Diaphragm device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111255904A (en) * 2020-02-20 2020-06-09 金陵科技学院 Section-adjustable flow limiting valve

Also Published As

Publication number Publication date
JPH075520A (en) 1995-01-10
GB9302178D0 (en) 1993-03-24
GB2274923A (en) 1994-08-10

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060204