04239977 is referenced by 38 patents and cites 3 patents.

An alternator, powered by a wind rotor having pitch changeable blades, is maintained at a fixed speed despite variations in wind speed and cyclic perturbations in rotor shaft speed due to rotor dynamics. In one embodiment, a geared speed increaser, coupling the rotor to the alternator, is mounted for reversible rotation relative to the rotor shaft. A fluid transfer means, such as a torque motor, coupled to a pressurized accumulator, applies such a torsional reaction to the speed increaser to permit its rotation at a rate which accommodates the difference between the instantaneous rotor shaft speed and that rotor shaft speed corresponding to the alternator's fixed speed. The fluid transfer means and accumulator means together permit a maximum angular displacement of the speed increaser sufficient to provide a time interval in which the rotor blade pitch may be corrected and the rotor shaft returned to normal speed. Pitch changes are effected, in part, responsive to rotation of the speed increaser.

Title
Surge-accepting accumulator transmission for windmills and the like
Application Number
5/946199
Publication Number
4239977
Application Date
September 27, 1978
Publication Date
December 16, 1980
Inventor
Warren A Strutman
St. Louis
MO, US
Agent
Jerome A Gross
Assignee
Jerome A Gross
MO, US
Lauren Strutman
MO, US
Lisa Strutman
MO, US
IPC
F16D 31/02
H02P 9/04
F03D 9/00
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