| 摘要 |
<p>A pressure-sensitive switch comprising an electrically-insulating base member having front and back surfaces with a central through opening Two electrodes are mounted on front surface. A flexible, corroguated diaphragm has its periphery secured in a fluid-tight manner to the base back surface and is provided with a centrally located post. The post extends through the base member where an electrically-conductive washer is fixed to it. A fluid-tight cap is secured to the front surface, covering an area above the washer and preventing fluid from entering the switch mechanism. When the switch is exposed to atmospheric pressure, the switch remains closed , but when exposed to a super-atmospheric pressure, the central portion of the diaphragm pushes the washer out of contact with both electrodes, thus electrically disconnecting the two electrodes. The pressure-sensitive switch is especially useful with hydrophones, as in seismic streamer cables.</p> |
