AU2538684A - Light filter - Google Patents

Light filter

Info

Publication number
AU2538684A
AU2538684A AU25386/84A AU2538684A AU2538684A AU 2538684 A AU2538684 A AU 2538684A AU 25386/84 A AU25386/84 A AU 25386/84A AU 2538684 A AU2538684 A AU 2538684A AU 2538684 A AU2538684 A AU 2538684A
Authority
AU
Australia
Prior art keywords
light filter
filter
light
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.)
Abandoned
Application number
AU25386/84A
Inventor
Ian Godfrey Saul
Robert Geoffrey Tyers
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.)
Commonwealth Industrial Gases Ltd
Original Assignee
Commonwealth Industrial Gases 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 Commonwealth Industrial Gases Ltd filed Critical Commonwealth Industrial Gases Ltd
Publication of AU2538684A publication Critical patent/AU2538684A/en
Abandoned legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/06—Masks, shields or hoods for welders
    • A61F9/065—Masks, shields or hoods for welders use of particular optical filters
    • A61F9/067—Masks, shields or hoods for welders use of particular optical filters with variable transmission
    • 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
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P1/00—Safety devices independent of the control and operation of any machine
    • F16P1/06—Safety devices independent of the control and operation of any machine specially designed for welding

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Liquid Crystal (AREA)
AU25386/84A 1983-02-24 1983-02-24 Light filter Abandoned AU2538684A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPF818483 1983-02-24
AUPF8184 1983-02-24

Publications (1)

Publication Number Publication Date
AU2538684A true AU2538684A (en) 1984-08-30

Family

ID=3770003

Family Applications (1)

Application Number Title Priority Date Filing Date
AU25386/84A Abandoned AU2538684A (en) 1983-02-24 1983-02-24 Light filter

Country Status (3)

Country Link
AU (1) AU2538684A (en)
GB (1) GB2138590A (en)
ZA (1) ZA841403B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261077A (en) * 1991-09-05 1993-05-05 Gordon James Dick Optical welding filter window
EP1131669B1 (en) 1998-10-26 2004-05-19 Pirs, Janez Driving scheme and electronic circuitry for a lcd electro-optical switching element

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1430183A (en) * 1972-03-27 1976-03-31 Aga Ab Device for the protection of an operators eyes against intensive radiation
US4279474A (en) * 1980-03-25 1981-07-21 Belgorod Barry M Spectacle lens having continuously variable controlled density and fast response time

Also Published As

Publication number Publication date
GB8404875D0 (en) 1984-03-28
GB2138590A (en) 1984-10-24
ZA841403B (en) 1985-06-26

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