| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a seismoscope which can cut off commercial power supply by vibration of earthquake and can be easily installed in an established dwelling. SOLUTION: A seismoball 6 can roll on a pocket surface 22 of a recessed surface formed in a pocket 2. Two electrodes 4a, 4b are formed concentrically on the pocket surface 22. The surface of the seismoball 6 is formed of conductive material. The electrodes 4a and 4b are connected with the voltage side and the ground side, respectively, of power lines on the load side of a breaker for wiring. A part between the electrodes 4a and 4b is short-circuited via the seismoball 6 by rolling of the ball 6 caused by vibration of a case 1.</p> |
