GB419586A - Improvements in, or relating to, gas masks - Google Patents

Improvements in, or relating to, gas masks

Info

Publication number
GB419586A
GB419586A GB15969/34A GB1596934A GB419586A GB 419586 A GB419586 A GB 419586A GB 15969/34 A GB15969/34 A GB 15969/34A GB 1596934 A GB1596934 A GB 1596934A GB 419586 A GB419586 A GB 419586A
Authority
GB
United Kingdom
Prior art keywords
relating
polyvinyl chloride
substances
difficultly
vinyl
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
GB15969/34A
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of GB419586A publication Critical patent/GB419586A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/08—Auxiliary lenses; Arrangements for varying focal length
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/082—Assembling eyepieces, lenses or vision-correction means in or on gas-masks

Abstract

An eyepiece or a transparent mask body for a gas-mask is made of polymeric vinyl compounds, such as difficultly combustible polyvinyl chloride, subsequently chlorinated polyvinyl chloride, or mixed polymerates of vinyl chloride and other polymerizable organic compounds. Softening agents or transparent resins or difficultly volatile solvents may be added to the vinyl compounds. Small quantities of other substances, such as dyestuffs or substances affecting the pliability of the composition, may also be incorporated.
GB15969/34A 1933-06-27 1934-05-29 Improvements in, or relating to, gas masks Expired GB419586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE419586X 1909-09-09

Publications (1)

Publication Number Publication Date
GB419586A true GB419586A (en) 1934-11-14

Family

ID=6449000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15969/34A Expired GB419586A (en) 1933-06-27 1934-05-29 Improvements in, or relating to, gas masks

Country Status (2)

Country Link
FR (1) FR419586A (en)
GB (1) GB419586A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245746B (en) * 1965-04-08 1967-07-27 Draegerwerk Ag Window, especially for respiratory masks or the like.
DE1278845B (en) * 1965-07-31 1968-09-26 Draegerwerk Ag Single-layer lens, clear lens or the like, in particular for breathing masks or diving masks
US3505680A (en) * 1968-09-09 1970-04-14 Watchemoket Optical Co Inc Safety goggle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245746B (en) * 1965-04-08 1967-07-27 Draegerwerk Ag Window, especially for respiratory masks or the like.
DE1278845B (en) * 1965-07-31 1968-09-26 Draegerwerk Ag Single-layer lens, clear lens or the like, in particular for breathing masks or diving masks
US3505680A (en) * 1968-09-09 1970-04-14 Watchemoket Optical Co Inc Safety goggle

Also Published As

Publication number Publication date
FR419586A (en) 1911-01-10

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