GB504827A - Improvements in and relating to gas masks - Google Patents
Improvements in and relating to gas masksInfo
- Publication number
- GB504827A GB504827A GB25938/37A GB2593837A GB504827A GB 504827 A GB504827 A GB 504827A GB 25938/37 A GB25938/37 A GB 25938/37A GB 2593837 A GB2593837 A GB 2593837A GB 504827 A GB504827 A GB 504827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face
- transparent
- caoutchouc
- heat
- masks
- 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
Links
Classifications
-
- 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
- A62B18/084—Means for fastening gas-masks to heads or helmets
Abstract
504,827. Gas - masks ; eye - pieces. ROMER, R. Sept. 24, 1937, No. 25938. Convention date, April 28. [Class 81 (ii)] [Also in Group XX] Gas-masks of the kind having a transparent face portion b carried by a face-contacting frame a are characterized in that the face portion is made from sheet material comprising a caoutchouc derivative containing chlorine particularly caoutchouc hydrochloride having chlorine content of 60- 70 per cent. Other portions such as a headcovering hood or fastening bands may also be made of the specified material. Union between the transparent material and other parts may be effected by heat and pressure and subsequent rapid cooling. Two or more layers of transparent material may be employed which layers may be secured together by heat and pressure, or may include fabric or wire reinforcements, or the material may be coated with ethyl or benzyl-cellulose varnish or other transparent heat-resisting and protective materials. The face-portion is preferably shaped to fit closely over the face, to minimize the dead space, and may carry a tilter-canister f direct or the canister may be carried by light metal straps k, which are secured to the frame a and to which the part b is adhesively secured. Eye-pieces c may be provided and may comprise light metal rings having sheet chlorinated caoutchouc stretched over them.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE504827X | 1937-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB504827A true GB504827A (en) | 1939-04-24 |
Family
ID=6546256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25938/37A Expired GB504827A (en) | 1937-04-28 | 1937-09-24 | Improvements in and relating to gas masks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB504827A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549543A (en) * | 1982-12-01 | 1985-10-29 | Moon William F | Air filtering face mask |
| US4595003A (en) * | 1983-10-21 | 1986-06-17 | The United States Of America As Represented By The Secretary Of The Army | Protective mask for airborne toxic substances |
-
1937
- 1937-09-24 GB GB25938/37A patent/GB504827A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549543A (en) * | 1982-12-01 | 1985-10-29 | Moon William F | Air filtering face mask |
| US4595003A (en) * | 1983-10-21 | 1986-06-17 | The United States Of America As Represented By The Secretary Of The Army | Protective mask for airborne toxic substances |
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