| 摘要 |
<p>In the field of tilt switches and shock sensors, it is known to provide a switch comprising a sealed chamber containing two switch terminals and a pool of mercury. On moving of the switch as a result of tilting or the application of an impulse, the mercury moves to close or open a circuit as desired. Such devices have disadvantages arising from the toxity of mercury. The disclosure relates to a switch assembly in which a magnet (26) is mounted for movement in the vicinity of a reed switch (20). A weight (29) is moveable in a direction generally perpendicular to the magnet (26), and is connected thereto by a mechanism (16;38,39,40;44) which translates the movement of the weight to movement of the magnet. The magnet (26) and reed switch (20) are configured so that the reed switch actuates on movement of the magnet. The advantage of the invention is that tilt switches and shock sensors can be constructed without the need for mercury. <IMAGE></p> |
