| 摘要 |
<p>Solar tracking appts. is for tracking the sun comprising focussing and mounting devices mounting the focussing for tracking movements of the sun. A drive includes heat expansible members movable with the focussing unit, the heat expansible members being disposed relative to the focussing unit so as to receive different amounts of solar radiation from the focussing unit when the focussing unit is misaligned with the sun so as to produce a differential expansion. The drive is operable on differential expansion of the heat expansible members to cause movement of the focussing unit in a direction towards realignment with the sun.</p> |
