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. Ledex was founded by G.H. Leland. Its predecessor was GH Leland Engineering in Dayton Ohio. Patents were filed on its behalf in 1950. Six of their Syncramental Servo-Step motors rode along on the Mercury capsule in the first manned spacecraft, Feb 20, 1962.