Patent ID: 8057159
Filing Date: 2011-11-15
Classification: F03D,F05B,Y02E

Abstract:
1. A twin wind turbine electrical power generating system comprising: (a) a first rotatable wind turbine with vertical radially extending blades around its axis; (b) a second rotatable wind turbine deployed parallel to the first turbine with vertical radially extending blades around its axis; (c) a vertical windshield positioned windwardly between the first and second wind turbines; (d) a wind direction member associated with the first and second wind turbines and directing the first and second wind turbines and windshield to face windward; (e) a rotational support upon which items (a), (b), (c) and (d) are mounted; (f) an alternator connected to the first and second wind turbines and generating electricity as the first and second wind turbines rotate, wherein the widths of the blades of the first and second wind turbines can be narrowed or widened according to variable wind speeds, wherein the turbine blades are formed of first vanes fixed to the rotatable wind turbine and second vanes movable relative to the first vanes, which cooperate together to increase or decrease the effective widths of the turbine blades, and wherein the second vanes are connected to springs and the position of the second vanes is determined by the force exerted by the springs to resist centrifugal force generated by the rotating wind turbines.