Abstract: In a vehicle, a housing has a weight that is normally centered by springs that yield to impact force components in several directions. This movement of the weight causes closing of fuel valves and opening of electrical switches that reduce the likelihood of fire or explosion in an accident.

Abstract: A fuel tank has an outlet fuel line with a valve adjacent the tank. The valve is air operated open and spring biased toward closed. A frangible envelope surrounds the fuel tank and is pressurized from the same air line as that to the valve so loss of air pressure in the envelope leads to closing of the valve in case of a crash situation that causes the envelope to rupture.

Abstract: A turbojet aircraft has a fuselage pod in which all fuel is stored for engines also linked to the pod. The pod and engines can be jettisoned in flight to improve aircraft performance in the event of a forced landing. The pod carries a plurality of fuel tanks, each having a collapsible bladder formed of a layer of elastomeric material and a layer of stainless steel mesh.

Abstract: A turbojet aircraft has a fuselage pod in which all fuel is stored for engines also linked to the pod. The pod and engines can be jettisoned in flight to improve aircraft performance in the event of a forced landing.

Abstract: Extruded aluminum members provide a sloped framework for supporting glazed panels in an inclined or sloped roof structure. A sill has a flat upper surface and upwardly sloping rafters rest on the sill and have channel defining portions to support the panels and to provide a passageway which moves moisture toward the flat sill. Purlin means provide a moisture proof joint for the panels between the rafters, and stop means at the sill and at the ridge of the roof structure provide a clean appearance for the resulting structure.