| 摘要 |
<p>A thermally-actuated switch assembly is capable of controlling an associated device in the event of a sensed temperature exceeding a predetermined threshold. A first switch in the form of for example a fuse is used to sense the temperature to which the device is sensitive. The first switch is carried by a housing which also carries a second switch. The second switch is arranged such that it is actuated if the housing is mounted on a support in a predetermined orientation. The first and second switches are connected to an output and arranged such that the output indicates an alarm condition if either the first switch is actuated or the second switch is not actuated. Thus one switch is used to sense the temperature, and the other switch is used to sense whether or not the switch assembly as a whole is correctly positioned.</p> |
