| 摘要 |
PURPOSE:To raise the reliability of a titled device by operating it only at the time of a set pressure value or below without utilizing a gas charged in an enclosed space in order to keep the balance of a pressure sensor and external pressure, by expanding an airtight chamber in case of a drop of the external pressure, releasing a hooked state of an operating plate, and forming a structure for making it rotatable. CONSTITUTION:In case when a titled device is installed in an enclosed space, if the pressure in the enclosed space, namely the pressure of the external pressure side to the pressure responding device drops, the pressure put on an airtight chamber, namely, a bellows 25 is weakened, and it becomes impossible to keep the balance with repulsion of a coil spring 26, therefore, the bellows expands with repulsion of the coil spring 26 and moves a tappet 27. At the same time, a projecting part 27a of the tapper 27 slides in a supporting hole 23a, the tip of the projecting part 27a pushes an operating plate 30, therefore, a hooked state to a hook 24, of the operating plate 30 is released, and in case of receiving any external force, it becomes a rotatable state against a torsion spring 31 as shown in a virtual line. |
