Self-contained breathing apparatus
AssigneeClipper Data Limited
InventorMartin John Parker
Life of this patent
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Abstract
The invention provides, in one aspect, a head up display unit for a re-circulating gas self-contained breathing apparatus of the type having at least one sensor for determining the oxygen partial pressure of the re-circulating gas. At least one optical fiber (32) is provided for transmitting a light signal or signals from a respective light emitter, positioned outside the wearer's field of view and electrically connected to the at least one sensor, to a display (26) in the wearer's field of view to provide the wearer with a visual indication of the light emitter signal or signals.
Claims19
A self contained breathing apparatus comprising a mask, a mouthpiece and at least one optical fibre for transmitting light from a respective light emitter positioned outside and remote from the wearer's field of view and optically connected to a display in the wearer's field of view to provide the wearer of the said breathing apparatus with a visual display of the light emitted by the said light emitter.
A self contained breathing apparatus comprising a mask, a mouthpiece and at least one optical fibre for transmitting light from a respective light emitter positioned outside and remote from the wearer's field of view and optically connected to a display in the wearer's field of view to provide the wearer of the said breathing apparatus with a visual display of the light emitted by the said light emitter,
- wherein the said optical fibre terminates within a housing with the respective end of the fibre directed towards the wearer, and
- wherein the said housing comprises guide means for guiding the said optical fibre in the housing and turning the said fibre so that the terminal end of the fibre is directed substantially perpendicularly to the direction of the fibre entering the housing.
Dependencies are inferred from the claim text.