|5007582||Reduced pressure steam heat treating device|
A device for heating with reduced pressure steam directly or indirectly a material or product to be heat-treated, which includes a heat exchanger chamber which is supplied with steam through a pressure reducing valve and evacuated by an ejector device whi...
A thermostatic valve including a housing that defines a housing inlet and a housing outlet and a valve body having an end wall and a side wall that define a valve chamber within the housing. The end wall defines an annular valve seat and a valve inlet ope...
|3973173||Curtain control system for poultry houses|
The side curtains of a poultry house are automatically opened upon a power failure in the electrical circuit of the ventilating system. An electrical monitoring circuit activated responsive to such power failure, releases a winch which normally maintains ...