04082479 is referenced by 31 patents and cites 12 patents.

An overspeed spoiler for vertical axis wind turbines of the type having straight or curved airfoil blades attached to a vertical shaft formed by a relatively thin flat blade shaped spoiler element hinge mounted on the trailing edge, leading edge, or at a central position of a portion of the airfoil section with the element having two portions one of which is held flush or against a surface by spring means with a surface of the blade towards the turbine rotor axis and the other lies substantially parallel to the chordline of the airfoil, the weight and configuration of the element being such that a predetermined turbine rotor speed the element rotates against the spring force because of centrifugal action and takes up a position generally transverse to the air flow direction such as to cause much increased drag and control overspeeding of the rotor.

Title
Overspeed spoilers for vertical axis wind turbine
Application Number
5/707205
Publication Number
4082479
Application Date
July 21, 1976
Publication Date
April 4, 1978
Inventor
Peter South
Ottawa
CA
Rajindar S Rangi
Ottawa
CA
Agent
James R Hughes
Assignee
Canadian Patents and Development
CA
IPC
F03D 7/06
F03D 3/06
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