U.S. Patent Specifications

A Pitot‐static tube structure comprising, in combination, a shell having a hollow protuberance thereon, said shell having a dynamic pressure opening at the front end and a static opening at the side thereof; a partition in said shell separating an interior portion of said protuberance from the remainder of the space in said shell; a dynamic pressure duct within said shell connecting said dynamic opening with the hollow of said protuberance above said partition; a continuation duct leading from a point near the top interior of said protuberance downwardly and out of said shell; a second duct leading outward from the interior of said shell; a heating element positioned internally near the forward end of said shell adjacent said dynamic pressure duct; a second heating element positioned nearer to said protuberance; and a heat conveying member arranged to conduct heat from said second heating element to an outer wall of said protuberance.