| 摘要 |
A switching circuit provides multi-way control of the connection of a relatively high current load to a source of power by the momentary closing of any one of a number of switches at remote locations. A control current in the milliampere range is fed to the remote switches at a voltage having either one of two levels, depending on whether the load is connected or not. An indicator which is sensitive to the voltage levels at each remote location shows the on/off status of the load connection.
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