| 摘要 |
<p>Apparatus for mounting an A.C. ballast and a D.C. emergency lighting system. A first elongated mounting member having first and second portions and a plurality of mounting holes is provided. The first portion is adapted to receive a first enclosure housing an A.C. ballast and an emergency lighting invertor. The second portion is adapted to receive a second elongated mounting member which supports a second enclosure housing a battery for providing emergency power. The second elongated mounting member may also be mounted in a spaced relation to the first elongated mounting member. A plurality of perforations are provided between the first portion and the second portion of the first member for severing the two portions from one another if there are space limitations. There is a raised portion having a slot associated therewith located on the first portion of the first elongated mounting member near the perforations for receiving a tab which extends from one end of the second elongated mounting member. At the other end of the second elongated mounting member there is a mounting hole and a rectangular space. The second portion of the first elongated mounting member also has a mounting hole and a rectangular space at one end. The combination of the rectangular space, holes and raised portion and tab help insure that the second housing containing the battery will be mounted only after the first elongated mounting member is mounted. The second housing containing the battery includes a pair of tabs which are shaped so that they will be wedged into the slot of the raised portion so that the first enclosure and the second enclosure are mounted a small distance from one another for thermal insulation. A thermal protective device is also connected to the ballast to guard against battery overheating during normal operations.</p> |
