Patent ID: 7247957

Claim:
An electromechanical transducer comprising: a first core providing a first flux path and defining a first air gap; at least one first stationary coil disposed around a portion of said first core; a second core providing a second flux path and defining a second air gap; at least one second stationary coil disposed around a portion of said second core; and a first armature arranged for linear motion along a longitudinal axis through said first and second air gaps; and wherein said first and second air gaps are positioned adjacent one another in spaced apart relationship along said longitudinal axis such that said longitudinal axis passes through said first and second air gaps; said first and second coils at least partly overlap in the direction of said longitudinal axis; said at least one first stationary coil and said at least one second stationary coil are positioned on opposite sides of a longitudinal plane in which said longitudinal axis lies; and said first and second cores are positioned such that said first and second flux paths are substantially on opposite sides of said longitudinal plane.