GB1015303A - Improvements in or relating to warning devices for respiratory apparatus - Google Patents
Improvements in or relating to warning devices for respiratory apparatusInfo
- Publication number
- GB1015303A GB1015303A GB1872363A GB1872363A GB1015303A GB 1015303 A GB1015303 A GB 1015303A GB 1872363 A GB1872363 A GB 1872363A GB 1872363 A GB1872363 A GB 1872363A GB 1015303 A GB1015303 A GB 1015303A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- oxygen
- flap
- duct
- spring
- 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
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/006—Indicators or warning devices, e.g. of low pressure, contamination
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
1,015,303. Warming devices for respiratory appliances. O. H. DRAGER [trading as DRAGERWERKE HEINR & BERNH DRAGER]. May 10,1963 [May 10,1962], No. 18723/63. Heading A5T. A closed circuit respiratory apparatus includes a warning device for warning the user when the nutrient gas supply is less than a predetermined value. The warning device comprises a spring bellows 12 in which is displaceably mounted driving member 17 which, under the action of spring 18, tends to extend the bellows 12. The member 17 is articulated to lever 19 which carries flap 20, movable from an open to a closed position, in which it blocks inhalation duct 21. The respiratory apparatus comprises a lung-controlled valve comprising control lever 5 bearing against diaphragm 3, and rockable valve closure member 6 adapted to close oxygen supply pipe 7. On inhalation, the diaphragm causes levers to rock and the valve 6 opens, allowing oxygen to flow to duct 21. Oxygen also flows through throttled screw connection 9 to chamber 11, which holds bellows 12. If the oxygen pressures drops too low, the action of spring 18 overcomes the oxygen pressure and the bellows 12 extend, causing flap 20 to close inhalation duct 21. Flap 20 may be provided with apertures provided with reeds, which result in a warning sound being given when the flap 20 closes duct 21. The gas pressure may act on the inside of the bellows. A throttle may be provided in connection 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED0038884 | 1962-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1015303A true GB1015303A (en) | 1965-12-31 |
Family
ID=7044394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1872363A Expired GB1015303A (en) | 1962-05-10 | 1963-05-10 | Improvements in or relating to warning devices for respiratory apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1015303A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995032022A1 (en) * | 1994-05-24 | 1995-11-30 | Comasec International S.A. | Warning device for breathing masks |
| WO2014035330A1 (en) * | 2012-08-30 | 2014-03-06 | Oxyreb Ab | Valve arrangement and a rebreathing system comprising said valve arrangement |
-
1963
- 1963-05-10 GB GB1872363A patent/GB1015303A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995032022A1 (en) * | 1994-05-24 | 1995-11-30 | Comasec International S.A. | Warning device for breathing masks |
| WO2014035330A1 (en) * | 2012-08-30 | 2014-03-06 | Oxyreb Ab | Valve arrangement and a rebreathing system comprising said valve arrangement |
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