GB615486A - Improvements in or relating to breathing apparatus - Google Patents
Improvements in or relating to breathing apparatusInfo
- Publication number
- GB615486A GB615486A GB17580/46A GB1758046A GB615486A GB 615486 A GB615486 A GB 615486A GB 17580/46 A GB17580/46 A GB 17580/46A GB 1758046 A GB1758046 A GB 1758046A GB 615486 A GB615486 A GB 615486A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- canister
- bag
- valve
- breathing bag
- 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
- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 4
- 229910052760 oxygen Inorganic materials 0.000 abstract 4
- 239000001301 oxygen Substances 0.000 abstract 4
- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 abstract 2
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000241 respiratory effect Effects 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/14—Respiratory apparatus for high-altitude aircraft
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
615,486. Respiratory appliances. MINE SAFETY APPLIANCES CO. June 12, 1946. No. 17580. Convention date, Dec. 6, 1939. [Class 81 (ii)] A closed circuit breathing apparatus comprises a mask 1, Fig. 1, connected by a single tube 2 to a breathing bag 51, Fig. 6, provided with an oxygen supply, spaced openings in tube 2 communicating with purifying canister 36 mounted in receptacle 21, and has check valve 41 adapted to open on inhalation disposed in the tube between the openings and adjacent the canister outlet. The exhaled air passes down tube 2, through canister 36 to the breathing bag 51 whence it returns via tube 2 by-passing the canister 36 due to check valve 41 opening on inhalation. Exhausted canister 36 is changed by opening cover 26 of receptacle 21 whereat spring urged valves 28, 29 close until a new canister is inserted; oxygen being breathed direct from the breathing bag and exhaled round the side of the mask 1 during this changeover. The breathing bag 51, Fig. 6, secured in box 52 on collapse to a predetermined point causes adjustable screw 87, in plate 83 fastened to the bag at 82 and hinged at 84, to open valve 57 and allows oxygen to enter through tube 81 from chamber 58 which is supplied from oxygen cylinder 53, through pressure regulating valve 64 controlled by bellows 62. The warm exhaled air from tube 2 passes into bag 51 round valve 57 preventing it freezing, but by-pass valve 92 is also provided for emergency use. A simplified form of collapsable breathing bag is. also described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US615486XA | 1939-12-06 | 1939-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB615486A true GB615486A (en) | 1949-01-06 |
Family
ID=22036470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17580/46A Expired GB615486A (en) | 1939-12-06 | 1946-06-12 | Improvements in or relating to breathing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB615486A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2172507A (en) * | 1985-03-06 | 1986-09-24 | Gorman & Company Limited Siebe | Improvements in and relating to breathing apparatus |
-
1946
- 1946-06-12 GB GB17580/46A patent/GB615486A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2172507A (en) * | 1985-03-06 | 1986-09-24 | Gorman & Company Limited Siebe | Improvements in and relating to breathing apparatus |
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