| 摘要 |
<p>A temperature sensor for a radiant electric heater, the sensor comprises a switch housing (7), a first expansion element (3) secured at one end thereof to the housing, and a second expansion element (5) mounted at its free end with a free end of the first expansion element such that the free ends of the two elements are immovable relative to each other, the first and second expansion elements having different coefficients of thermal expansion. A snap switch (11) is disposed within the housing and including a switch arm (9). An abutment member (21) is axially aligned with the second expansion element, the abutment member including means (23) for receiving the end of the second expansion element and means for engaging with biasing means (29) acting between the housing and the abutment means so as to urge the abutment member towards the switch arm for controlling actuation thereof. In this way, the end of the second expansion element and the abutment member engage with the biasing means by way of an aperture provided in the switch arm of the snap switch.</p> |
