| 摘要 |
<p>An expanded annunciator of the status of individual switches in a series circuit of interlock switches, has a schematic of the series circuit printed on its display panel face. Display elements such a light-emitting diodes are juxtaposed to the switches, and emit light to symbolize that the switches are conducting. Preferably, the schematic is printed with individual switch symbols arranged in a line, and lines are drawn on the panel face from individual display elements to the lines symbolizing the conductors whose voltage level is displayed by the display element involved.</p> |
