Abstract: A level vail includes a pair of elongated tubes, each having a top open end and a bottom open end. A pipe has two ends, respectively connected to the bottom ends of the elongated tubes. Water is contained in each of the elongated tubes, in each of which a floating article is also provided. A communicating member is provided on the top open end of each of the elongated tubes. One communicating member has at least one passage which communicate the interior of the elongated tube and the external atmsophere. A blocking member is movably disposed in the communicating member so that the passage of the communicating member can be opened and closed selectively.

Abstract: An apparatus for sterilizing a shoe includes a housing 1 mounting an elongate ultraviolet lamp 2, a heating element 3 and a ventilating fan 4. Exposure of the inner sole of the shoe to the ultraviolet rays and the heated air has a sterilizing effect, thus stopping the growth of bacteria and fungi in the shoe. The apparatus may be designed to sterilize a pair of shoes at the same time, or it may have some flexible parts to allow it to reach the inner sole of other footwear such as boots and the like.

Abstract: An air sterilizing apparatus includes an enclosed housing which accommodates radiant sterilizing tubes carried by a holder capable of moving out of the housing or retracting thereinto by means of a moving mechanism. When the holder is moved out, the radiant sterilizing tubes thus exposed sterilize the external air surrounding the housing. When the holder is moved back into the housing, the radiant sterilizing tubes sterilize the air drawn into the enclosed housing through an inlet, after which the sterilized air is discharged through an outlet of the housing.