| 摘要 |
A snap-disc-actuated switch for monitoring high fluid pressures is disclosed. A non-bistable snap disc, calibrated to snap from its stable state upon application of a relatively low force, is engaged at its center by one end of a pistonlike plunger having its other end exposed to a highly pressurized fluid. The effective cross-sectional area of the fluid-exposed end of the plunger is minimized to provide, in response to relatively high fluid pressure, the required low operating force directly to the snap disc via the plunger, the diameter of the plunger's exposed end being substantially less than the diameter of the disc. The force generated by the disc, when automatically resetting to its normal stable state, constitutes the sole means for moving the piston against the pressurized fluid-generated force acting on the exposed end of the piston.
|
