| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bath tub water level alarm device, without the need for any power source whatsoever, capable of eliminating risks of misoperations and malfunctions caused by the fact that electrical corrosion of electric circuit parts are induced to have the tendency of generating rust, resulting in degradation of the electric circuit components and poor contact, and stick of water scale, oil, and dirt to water level-sensing sensor terminals cannot be avoided, unless watertight measurement and maintenance are completely performed, in a highly reliable manner, under high temperature conditions due to steam in a bathroom for the bath tub water level alarm device having the electric circuit. Ž<P>SOLUTION: The bath tub water level alarm device comprises a cylinder which serves as its body, an air hole at a central position, a permanent magnet disc disposed with a whistle having a blow port at the air hole and working as a cylinder head cover, and a piston-type float including the permanent magnet disc at a top head portion and moving in the cylinder. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
