Remotely controlled electrically actuated air flow control register

An air flow controllable register unit for controlling flow of air through the register from an air circulating system having a register air flow supply duct, said controlled flow in response to an externally provided control signal that commands said register air glow control unit to provide differing air flow rates through said register, said air flow controllable register comprising:

• a register flow control means having an air driven turbine positioned in said register, said turbine responsive to air flow through said register, said air driven turbine initially restricting air flow at said register at system start-up.
• said air driven turbine having radially disposed blades coupled to a turbine hub mounted for rotation about an axis,
• said radially disposed blades are each rotatably mounted about an axis that intersects said turbine hub axis,
• a blade pitch control means coupled to said blades and responsive to the air turbine rotary speed to cause said blades to rotate into said air flow restricting position when said air circulation system is at start-up with system air flow rates at a minimum and into a reduced air flow restriction position allowing higher air flow rates when said rotary turbine speed has increased,
• a braking means coupled to said turbine blade hub and responsive to said external control signal to brake said hub upon command of said control signal to thereby reduce said rotary turbine speed and cause said blade pitch control means to rotate said blades into said air flow restricting position which produces a lower air flow rate from the register.

An air flow controllable register unit for controlling flow of air through the register from an air circulating system having a register air flow supply duct, said controlled flow in response to an externally provided control signal that commands said register air flow control unit to provide differing air flow rates through said register, said air flow controllable register comprising:

• a register flow control means having an electric power generating means that includes a rotary mounted air turbine positioned within said register air flow supply duct, said air turbine is coupled to a generator to drive the same upon air flow against blades of said turbine,
• said air driven turbine initially restricting air flow at said register at system start-up,
• said air driven turbine having radially disposed blades coupled to a turbine hub mounted for rotation about an axis,
• said radially disposed blades are each rotatably mounted about an axis that intersects said turbine hub axis,
• a blade pitch control means coupled to said blades and responsive to the air turbine rotary speed to cause said blades to rotate into said air flow restricting position when said air circulating system is at start-up with system air flow rates at a minimum and into a reduced air flow restriction position allowing higher air flow rates when said rotary turbine speed has increased,
• said register flow control means responsive to said externally provided control signal to provide a loading of said generating means so that said air turbine hub is braked to thereby reduce said rotary turbine speed and cause said blade pitch control means to rotate said blades into said air flow restricting position which produces a lower air flow rate from the register.