Thermostatic valve

Claim 1

A thermostatic valve including a temperature and a humidity control for a heating plant and the like, comprising a valve housing forming a flow passageway through one part thereof, said valve housing including wall means in said flow passageway forming a partition extending across the flow passageway and providing an opening for admitting flow through said passageway, the periphery of the opening in said wall means defining a valve seat, a valve disc movably positionable between a first position on said valve seat for blocking flow through the opening and at least a second position spaced from said valve seat for admitting flow through the opening, an axially extending spindle assembly secured to said valve disc and extending through said housing in another part thereof extending outwardly from said flow passageway, said valve spindle assembly including a spindle part secured at one end to said disc valve, and a humidity sensing member and a temperature sensing member arranged in series along the axis of said spindle assembly and extending from the end of said spindle part opposite from the end attached to said valve disc, said temperature sensing member including a thermostat having a working piston positioned on the axis of said spindle assembly, said another part of said housing extends transversely outwardly from said one part forming said flow passageway, said another part of said housing having an end wall closing its end adjacent said one part and blocking flow between said another part and said flow passageway, said spindle part extending from said valve disc through said end wall into said another part of said housing, a reinforcement piece secured to the end of said spindle part within said another housing, said humidity sensing member comprises a first member expandible and contractible in accordance with changes in humidity and being fitted to said reinforcement piece and being formed of a material distinct from the material of said reinforcement piece, said thermostat positioned axially outwardly from said first member, said working piston of said thermostat extending from said thermostat toward said first member, an enlargement member secured to the end of said working piston spaced from said thermostat and located within and in contact with said first member, said thermostat having a reinforcement section extending radially outwardly from the remainder of said thermostat at its end closer to said valve disc, an axially extending compression spring bearing against said reinforcement section of said thermostat at one end and against said housing at its other end spaced axially outwardly from said thermostat for biasing said working piston of said thermostat in the closing direction of said valve disc, said another part of said housing having slots therethrough for admitting the ambient atmosphere into the interior thereof for contact with said humidity sensing member and said temperature sensing member, spring means associated with said spindle part for biasing said spindle part and said valve disc into the second position, and said another part of said housing including a rotatable knob member for varying the control of said valve.