| 摘要 |
<p>One cable end is provided with terminals, and the free wire ends are allocated to corresponding terminals. Sensor touch switches are used, which switch on lights when they make contact with the wire ends. The operator is provided with a platform, under which an open wire loop is provided, connected to the mains by one end. Its number of turns corresponds to the required basic sensitivity. It's potential is inductively applied to at least the input of a corresponding sensor which when the operator touches a wire end. This normally open switch is opened and closed at the mains frequency switching on an optical signal and/or a switching logic unit tuned to the cable.</p> |
