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Self-contained breathing apparatus
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sullivan, J. L. Giorgini, E. A. |
| Copyright Year | 1976 |
| Description | A self-contained breathing apparatus with automatic redundant fluid pressure controls and a facemask mounted low pressure whistle alarm is described. The first stage of the system includes pair of pressure regulators connected in parallel with different outlet pressures, both of which reduce the pressure of the stored supply gas to pressures compatible with the second stage breathing demand regulator. A primary regulator in the first stage delivers a low output pressure to the demand regulator. In the event of a failure closed condition of the primary regulator an automatic transfer valve switches on the backup regulator. A warning that the supply pressure has been depleted is also provided by a supply pressure actuated transfer valve which transfers the output of the first stage pressure regulators from the primary to the backup regulator. The alarm is activated in either the failure closed condition or if the supply pressure is reduced to a dangerously low level. |
| File Size | 436618 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760017812 |
| Archival Resource Key | ark:/13960/t3421rh17 |
| Language | English |
| Publisher Date | 1976-05-18 |
| Access Restriction | Open |
| Subject Keyword | Man/system Technology And Life Support Respirators Warning Systems Automatic Control Redundant Components Oxygen Supply Equipment Breathing Apparatus Pressure Regulators Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
