초록 ▼

A device for shielding a heated surface from infra-red detection through an opening adjacent to the heated surface. The device includes a gas-conducting member, which is adapted to receive heated gases, and has an exterior surface, an interior surface, an inlet for receipt of heated gases from the o

A device for shielding a heated surface from infra-red detection through an opening adjacent to the heated surface. The device includes a gas-conducting member, which is adapted to receive heated gases, and has an exterior surface, an interior surface, an inlet for receipt of heated gases from the opening, and an outlet for the discharge of gases. The gas-conducting member has a configuration which blocks the inlet to the member from line-of-sight view through the outlet to the member. Additionally, the device draws cooling air over the exterior surface of the gas-conducting member. The cooling air may then be mixed with the heated gases within the gas conducting member. This provides cooling of the gas-conducting member to prevent the member from being visible to infra-red detection and may also provide cooling of the gases which are discharged from the outlet of the gas-conducting member by mixing of the heated gases with the cooling air.

대표청구항 ▼

A device for shielding a heated surface from infra-red detection through an opening adjacent to the heated surface comprising: a gas-conducting member adapted to receive heated gases from the opening; said member having an exterior surface imperforate along its length, an interior surface, an inlet

A device for shielding a heated surface from infra-red detection through an opening adjacent to the heated surface comprising: a gas-conducting member adapted to receive heated gases from the opening; said member having an exterior surface imperforate along its length, an interior surface, an inlet for receipt of heated gases, and an outlet for discharge of gases; said member having a configuration which blocks said inlet from line-of-sight view through said outlet; said member including means forming a plurality of nozzles each having an opening through which heated gases flow; means forming a plurality of spaced ducts each including an imperforate exterior wall surface and cooperating with said nozzles to form a plurality of fixed ejectors for intermixture of cooling air with heated gases to cool the heated gases and for flow of the intermixture to said outlet; each said duct having a fixed opening of a fixed predetermined size greater than the opening of the associated nozzle; cooling air passage means including walls which are imperforate along their length positioned between said ducts and cooperating with each said duct and said exterior surface of said member to cool the exterior surface of each said duct and the exterior surface of said member by passage of cooling air thereover; means for creating a region of reduced pressure for drawing cooling air into said cooling passage means; means forming a cooling air inlet for said cooling passage means and a discharge therefor; and, means forming a cooling air inlet for said ducts and a discharge therefor, whereby the heated gas in each said duct is cooled by admixture with cooling air while the exterior surface of said member and said duct is cooled by cooled air flowing through said cooling passage means.