Ceiling air terminal

Claim 1

In combination with a ceiling air terminal operable to discharge conditioned air into an area, a bleed-type thermostat comprising: A. means defining a housing; B. means forming a bleed port associated with such housing; C. a plate slidably disposed in said housing and movable in a horizontal plane therethrough, said plate being operable to regulate the flow of air through said bleed port; D. adjustable support means mounted on said housing means; E. a bimetallic element having one end affixed to said adjustable support means for adjusting the location of said bimetallic element relative to said housing; F. means associated with the other end of said bimetallic element for moving said plate in response to movement of said other end of said bimetallic element, said last mentioned means including a member formed from a thermoplastic material, said thermoplastic member being in direct contact with said plate and said bimetallic element, passage of ambient air over said bimetallic element causing movement thereof in response to temperature variations to regulate the flow of air through said bleed port; G. means to provide a biasing force on said plate in opposition to the force supplied thereon by said bimetallic element responsive means; and H. stop means associated with said bimetallic element to prevent movement thereof beyond a predetermined distance, to maintain a minimum clearance between an edge of said plate and said housing, to thereby prevent said thermoplastic member from being deformed as a result of excessive stress thereon.