| 摘要 |
<p>A light fitting (1) is provided in which a lamp can be housed in a housing (2). The housing (2) comprises a wall (4) in which one or more ventilation holes (7) are formed. A plate (25) overlies the ventilation holes (7) and is biased towards the wall (4). During normal use the plate (25) is separated from the wall by a sacrificial member (24), allowing air flow through the ventilation holes (7). However, in case of a fire the sacrificial member (24) melts and the plate (25) moves towards the wall (4) covering the ventilation holes (7). This can prevent ventilation through the ventilation holes (7) acting to spread the fire throughout a building.</p> |
