| 摘要 |
Temperature limit control having a normally closed contact switch secured to a formed cup with vacuum operated formed diaphragm seal to cup bottom, contacts open on reduced vacuum as by boiling thermal fluid in the linear capillary tube welded to the cup below the diaphragm or boiling of fluid in a sensor bulb welded to the capillary tube end for remote temperature control, with vacuum leakage within lower cup, diaphragm, capillary tube and, or, sensor bulb releasing diaphragm from its pulled down position against inward formed dimples between the cup side and central outlet likewise opening contacts providing fail safe operation.
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