Compatible smoke and oxygen masks for use on aircraft

An improvement to a windowed smoke mask and oxygen mask, said oxygen mask of the type comprising a hollow flexible cup having a substantially flat end surface, said end surface incorporating an oxygen inlet port, a vent port, a cabin air inlet port, and a flexible mounting strap mounted thereto, said smoke mask and said oxygen mask for use by passengers in an aircraft cabin, said aircraft having a source of pressurized fresh air and oxygen gas, the improvement being a system for coupling said oxygen mask to said smoke mask comprising:

• a protrusion mounted on the front of said smoke mask, said protrusion having a substantially flat face, said protrusion adapted to receive said oxygen mask;
• a vent valve means mounted on said flat face of said protrusion in a manner such that it is aligned and coupled to said vent valve of said oxygen mask when said oxygen mask is mounted on said protrusion;
• an inlet valve means biased to the closed position mounted on said flat face of said protrusion, said inlet valve means having an actuation button protruding to the exterior thereof, said intake valve means mounted in such a manner that it is aligned and coupled with said oxygen inlet valve of said oxygen mask when said oxygen mask is mounted on said protrusion;
• plug means mounted on said flat face of said protrusion adapted to plug said cabin air inlet valve on said oxygen mask when said oxygen mask is mounted to said protrusion;
• a conduit means coupled to said source of fresh air;
• disconnect valve means coupling said conduit means to said interior of said smoke mask adapted, when actuated, to disconnect said conduit means from said face mask and further adapted to seal off the interior of said smoke mask;
• lanyard means coupled to said disconnect valve means adapted when actuated to actuate said disconnect valve means;
• attachment means coupled to both said smoke mask and said oxygen mask adapted to attach said oxygen mask to said smoke mask;
• and
• alignment means coupled to both said smoke mask and said oxygen mask adapted to align said oxygen inlet valve, said vent valve and said cabin air inlet valve of said oxygen mask with said intake valve means, said vent valve means and said plug means, respectively, of said smoke mask when said oxygen mask is mounted to said protrusion.