ZA841403B - Light filter - Google Patents

Light filter

Info

Publication number
ZA841403B
ZA841403B ZA841403A ZA841403A ZA841403B ZA 841403 B ZA841403 B ZA 841403B ZA 841403 A ZA841403 A ZA 841403A ZA 841403 A ZA841403 A ZA 841403A ZA 841403 B ZA841403 B ZA 841403B
Authority
ZA
South Africa
Prior art keywords
light filter
filter
light
Prior art date
Application number
ZA841403A
Inventor
Robert Geoffrey Tyers
Ian Godfrey Saul
Original Assignee
Commw Ind Gases
Cons Technology Pty 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 Commw Ind Gases, Cons Technology Pty Ltd filed Critical Commw Ind Gases
Publication of ZA841403B publication Critical patent/ZA841403B/en

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)
  • Heart & Thoracic Surgery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biomedical Technology (AREA)
  • Mechanical Engineering (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Liquid Crystal (AREA)
ZA841403A 1983-02-24 1984-02-24 Light filter ZA841403B (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ZA841403B true ZA841403B (en) 1985-06-26

Family

ID=3770003

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA841403A ZA841403B (en) 1983-02-24 1984-02-24 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
AU6494599A (en) 1998-10-26 2000-05-15 Bojan Marin Driving scheme and electronic circuitry for the lcd electrooptical 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
AU2538684A (en) 1984-08-30
GB8404875D0 (en) 1984-03-28
GB2138590A (en) 1984-10-24

Similar Documents

Publication Publication Date Title
GB8428855D0 (en) Optical filters
IL69638A0 (en) Easily-cleanable filters
GB2140706B (en) Filter
GB8308588D0 (en) Filter
GB8425418D0 (en) Filtration
GB2145011B (en) Filter
GB2148140B (en) Filter
DE3473935D1 (en) Light filter
GB8407752D0 (en) Filter
DE3465523D1 (en) Optical filter device
GB8316222D0 (en) Filter
GB8330452D0 (en) Filtration
GB8404875D0 (en) Light filter
IL69145A (en) Filter
GB2145306B (en) Filter arrangement
GB8329307D0 (en) Filter
GB8321079D0 (en) Light transmitting filters
GB8321080D0 (en) Light filter
KR840002755Y1 (en) Filter
GB8301796D0 (en) Filters
GB8327555D0 (en) Filters
GB8304472D0 (en) Filters
GB8327554D0 (en) Filters
GB8307019D0 (en) Filters
IL91610A0 (en) Easily-cleanable filters