| 摘要 |
<p>The actuator is illuminated by a light source, in order to indicate each respective switching state. It has a switching wheel actuating contact springs via cams. The arrangement is such that the setting shaft (14) carries with it the switching wheel, when forced to move by the actuator. The setting shaft retains, at least in partial sections, connecting leads (54, 55, 56) from the light source (52, 53), located in the rotary actuator (44). The connecting leads are preferably cast in suitable material in the hollow setting shaft. The light source may contain several glow or incandescent lamps, mounted in the actuator. They may have a reverse current lead for all lamps, which incorporates a resistor. The axial movement of the setting shaft may insert the same into the switching wheel (16).</p> |
