| 摘要 |
<p>The night light or signalling light has a frusto-conical body formed of a transparent or translucent material. An annular cover has a closed end surface, the body having contacts in its lower area. An electric element is positioned between the contacts, the element being in the form of a noon lamp. The resistance of the element is such that when it is in a network, the device provides a light intensity maintained by the transparency or translucency of the body. The upper open end of the body may have notches, its middle part having orifices for the dissipation of heat.</p> |
