| 摘要 |
<p>A lighting device, comprising a supporting rail defining a receiving channel in which are disposed conduit rail carriers. A plurality of electrical conduit rails are received in the conduit rail carriers. Three of the conduit rails constitute pole rails and one of the conduit rails constitutes a zero-conduit rail. A connection box is insertable into the supporting rail and is equipped with a plurality of spring holding- and contact-tongues switchable selectively by means of a switch into an engagement- and contact-position with one of the pole rails and into an inoperative position, respectively. An independent preselection switch is disposed between each individual pole contact tongue for the formation of an operating current circuit, and switchable from outside of the supporting rail, and is further equipped with switch contact points of a number corresponding with the number of pole rails on the side of the supporting rail and having an individual contact connection with one of the pole contact points, and a switch bridge on the inside of the preselection switch is connected with a light source by means of a current conduit, and the light source being disposed between the current feed on the pole side and the zero conduit.</p> |
