| 摘要 |
PURPOSE:To shut the gas in emergency by such a construction that the secondary power is increased by the action of a metal globe when vibrations with an acceleration over a certain set value are applied. CONSTITUTION:When a steel ball 6 is hopped up, it will act as shown by the broken line 5. When, thereafter, the reset shaft 3 is lifted to add the force of a return spring 4 and the lower magnet 2 begins rising, an upper magnet 1 attracts it. The steel ball 6 has small power at this time, but the force applied to the lower magnet 2 is increased to a great extent. The ball 6 works as a trigger in this case. Because, in such a conditions, a wire fixture 14 is pulled up at the same time as the pull fitting 7 is raised, the wire 8 lifts the valve 6 to be pressed to the valve seat closely. Thus the gas flowing is stopped. |
