| 摘要 |
<p>1. An electrical installation device with a support ring for flush mounting in a wall box and comprising a sealing ring which consists of resilient material and comprises a flange which seals the support ring against the wall box and a cylindrical collar which engages in the wall box, characterized in that the sealing ring (5) is so dimensioned that it may be inserted into wall boxes (3) with the standardized internal width of 58 mm and its flange (5a) projects beyond the edge of such a wall box (3) but only so far that the flanges (5a) do not overlap in the case of two adjacent wall boxes (3) at the standardized centre-to-centre distance of 71 mm, and the cylindrical collar (5c) directly surrounds the inserted device (1 or 2) at its outer edges coming closest to the wall box (3), a second, but collarless, sealing ring (6) is interposed between the support ring (7) and a cover plate (4), and there is formed in the cover plate (4) at least one recessed portion in which a central cover plate (11, 12) is fitted and the central cover plate (11, 12) rests in surface contact on an edge (4e) defining an internal opening (4a, 4b) in the cover plate (4).</p> |
