Fluid reaction surfaces (i.e. – impellers) – With control means responsive to non-cyclic condition... – Responsive to relative working fluid velocity
Patent
1980-08-07
1983-09-27
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
With control means responsive to non-cyclic condition...
Responsive to relative working fluid velocity
416119, F03D 706
Patent
active
044065841
ABSTRACT:
A windmill of the vertical axis type having a plurality of circumferentially and radially outwardly spaced rotatably mounted vanes vertically parallel to the axis shaft wherein means are provided for controlling multistage feathering of the vanes in conjunction with said vanes feathering to rotate on their individual axes in a direction opposite to the direction of rotation of the windmill assembly in increments of 45 degrees twice for each blade before finally feathering a final half rotation completing the rotation of 360 degrees on its individual axis while the windmill makes one revolution, thus repeatedly repositioning the blades to the most optimum resistance angle to the wind as the windmill rotates increasing the power angle to near seventy-five percent of the circle of the windmill rotation, a construction option prevailing to routinely cause all the blades to feather when near a zero angular position to the wind, and having associated therewith a conglomerate of mechanical phenomena to perform said functions and to release all blades in the event of a wind velocity exceeding a safe speed for the structure, bringing the windmill to a stop until the wind velocity recedes to a safe precalculated speed causing the windmill to automatically resume operation, characteristic of the total and complete automatism of this windmill.
REFERENCES:
patent: 1330380 (1920-02-01), Manning
patent: 1626313 (1927-04-01), Tuckey
patent: 1804241 (1931-05-01), Whipp
patent: 1964347 (1934-06-01), Ford
patent: 2107690 (1938-02-01), Clark
patent: 4178126 (1979-12-01), Weed
patent: 4203707 (1980-05-01), Stepp
patent: 4218184 (1980-08-01), McPherson
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