Abstract: A humidistat including an air inlet defining a beginning of an airflow path through the humidistat, a humidity sensor for enabling measurement of the humidity of air flowing along the airflow path, a baffle, a heat source for heating air along a portion of the airflow path, the baffle and the heat source cooperating to define two zones in the humidistat, and an air outlet defining an end of the airflow path. During operation of the humidistat, the air temperature is higher in one zone than in the other zone, and the higher air temperature zone is downstream from the lower air temperature zone in the airflow path.

Abstract: There is provided a humidity controlled piano including a housing containing piano sound board. The housing further contains humidifier and dehumidifier apparatus. The housing includes a partial enclosure formed by a substantially rigid top and sides. The rigid enclosure has an open end. A moisture impervious aperture free sheet substantially covers the open end so that the relative humidity within the housing may be controlled.

Abstract: A combination wind or sun screen and beach blanket apparatus includes a blanket having at least one aperture in each corner. A screen assembly consists of right and left poles having disposed between them a flexible sheet of material, the poles have tapered or pointed ends for insertion into the corner aperture of the blanket to secure the blanket in the ground and to form a vertical wall to block the effect of the wind or to operate to cast a shadow on the blanket as desired.