Ledex
Ledex produces a line of motorized solenoids and electric switches used in a wide variety of industrial applications. The original product used a ratcheting system to provide one-way motion so that every activation advanced the switch one position. The company used the same concept to develop a number of similar products and later branched out to the wider industrial switching market. The company is currently owned by Johnson Controls. Over time the term has become generic and can now refer to any similar motorized switch.
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