Ventilation – Having inlet airway – Including automatic control means
Patent
1993-12-17
1994-11-15
Wayner, William E.
Ventilation
Having inlet airway
Including automatic control means
236 493, 236 51, F24F 700
Patent
active
053643046
ABSTRACT:
The invention relates to 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. The air flow is controlled in response to an externally provided control signal that commands the register flow control unit to provide differing air flow rates through the register. The register unit includes a register flow control apparatus which has a power generating device that includes a rotary mounted air turbine positioned within the register air flow supply duct. The air turbine is coupled to a generator to drive the same upon air flow against blades of the turbine. The air driven turbine initially restricts air flow of the register at system start-up.
A blade pitch control device is coupled to the blades and is responsive to the air turbine rotary speed to cause the blades to rotate into an air flow restricting position when the 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 the rotary turbine speed has increased.
The register flow control apparatus is responsive to the externally provided control signal to provide a loading of the generator so that the air turbine is braked to thereby reduce the rotary turbine speed and cause the blade pitch control device to rotate the blades into an air flow restricting position which produces a lower air flow rate from the register.
REFERENCES:
patent: 2540958 (1951-02-01), Newton
patent: 4824012 (1989-04-01), Tate
patent: 5251815 (1993-10-01), Foye
Hampton Electronics, Inc.
Wayner William E.
Williamson Harold A.
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