| 摘要 |
A normally open temperature sensitive electrical switching device includes a heat fusible electrically conductive pellet which melts and provides an electrically conductive path through the switching device at a predetermined temperature level and, further, includes arc contacts defining an air gap across which arcing will occur when a sufficient potential is supplied to the switching device. A first electrically conductive electrode and second electrically conductive electrode are electrically connected to first and second electrical leads provided for an electrical connection to the device. A nonconductive mounting arrangement holds the first and second electrodes in spaced relation. The heat fusible conductive pellet is positioned in contact with the second electrode and defines the air gap of predetermined dimension with the first electrode. Current will therefore flow between the first and second electrical leads when the voltage across the air gap is sufficient to cause arcing or when the fusible pellet is heated to its predetermined fusion temperature.
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