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4764313 |
Air driven water circulation mill
A flotation platform supports a mast assembly through which a drive shaft extends having a wind driven turbine on the upper end and a propeller on the lower end situated below the water surface....
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4757211 |
Machine for generating electricity
In order to construct windmills with high capacity the machinery need to be constructed and dimensioned in such a manner that any type of damage to the machinery is avoided. This is best ensured by...
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4748339 |
Wind turbine operated electrical generator system
A wind turbine operated electrical generator system, said system comprising a wind turbine of the axial flow type, the blades of the turbine including tip portions pivoted with respect to the...
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4735382 |
Space craft cellular energy generating and storage device
A space craft cellular energy generating and storage device for generating electrical power in space and storing the power for extended periods of time. The space craft generating and storage...
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4730119 |
Sail-driven wind motor
A sail-driven wind motor (SDWM) is described, in which a reciprocating load amenable to intermittent, bidirectional drive (such as a water pump or air compressor) is driven by one or two arms, with...
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4708592 |
Helicoidal structures, useful as wind turbines
A collapsible structure comprising a non-rigid helicoidal sheet braced by light-weight members according to one of several methods. The structure is used in the construction of a wind turbine,...
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4707617 |
Windmill apparatus
A windmill apparatus includes: a frame body structure adapted to be positioned on a flat top of a construction; a main shaft vertically installed in the middle of the frame body structure; a first...
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4703189 |
Torque control for a variable speed wind turbine
Apparatus and method for controlling a variable speed wind turbine-generator at improved efficiencies is disclosed. The method and apparatus of the invention control the rotor tip speed below the...
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4700081 |
Speed avoidance logic for a variable speed wind turbine
A variable speed wind turbine is controlled in a way which avoids the turbine lingering at a critical speed which would otherwise tend to cause excessive vibration. The disclosed method and...
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4695736 |
Variable speed wind turbine
A variable speed wind turbine includes a frequency converter which converts variable frequency AC from a turbine driven AC generator to fixed frequency AC for delivery to a power grid. The...
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4692631 |
Turbine alternator with a central clear optical path
A turbine alternator comprising a central clear optical path through which certain objects or optics may pass unimpeded. This design features a means for internal safe arming of the munition in...
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4684817 |
Valvular sail power plant
A windmill generally intended to rotate in a horizontal plane about a vertical axis, includes essentially radial vanes; each which is effectively a one way valve respective to air flow; each which...
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4678923 |
Windmill
A windmill for generating electricity in which each blade of the air-screw is connected to the hub by means of at least two resilient strips which are oppositely inclined both in the plane of...
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4673822 |
Wind electric generator
Wind mill blades are mounted on spokes provided on a power shaft via springs, and thereby in an ordinary wind velocity the wind mill blades are adjusted into a prescribed angle, while in a storm...
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4659940 |
Power generation from high altitude winds
There are disclosed method and apparatus for the production of electrical power from high altitude winds. A kitecraft (12) secured to a ground tether (14) supports a cylindrical drum (10) rotatable...
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4656362 |
Blade pitch angle control for large wind turbines
A blade pitch angle control system for a wind turbine includes an improved control means (95) for providing a minimum pitch angle reference signal indicative of desired blade pitch at wind...
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4651017 |
Wind energy conversion system
The wind energy conversion system includes a wind machine having a propeller connected to a generator of electric power, the propeller rotating the generator in response to force of an incident...
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4649284 |
Windmill
A windmill includes a supporting frame, a vertical transmission shaft rotatably mounted in the supporting frame, a plurality of fan blades, each having two bending edges longitudinally formed on...
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4641039 |
Wind motors and aerogenerators
An aerogenerator or wind motor comprises a variable pitch propeller rotor. It comprises compensation means (13) which are sensitive to the deceleration of the rotor to automatically exert on each...
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4636707 |
Power generating equipment
An alternating current electrical power generating system in which the generator is driven by a prime mover, such as a fluid-driven turbine, whose speed may vary, the generator rotor being coupled...
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4613763 |
Wind driven electric power generating system
The shaft of a wind driven propeller is coupled to the rotor shaft of an electrical generator through an over-running centrifugal clutch and a speed changer mechanism. When the wind attains a...
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4613762 |
Output responsive field control for wind-driven alternators and generators
The field voltage of a wind-driven alternator or generator is automatically controlled in response to the output voltage developed in the load with the objective of always maintaining the maximum...
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4611125 |
Power potentiating windmill
An apparatus is disclosed for taking advantage of the Bernoulli Principle for moving an airfoil, the airfoil being mounted on a collar for rotation about an axle when in a moving fluid medium. The...
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4609827 |
Synchro-vane vertical axis wind powered generator
A vertical axis wind powered generator apparatus has airfoil shaped vanes, a positive and synchronous vane orientation system which is controlled by a mechanism located exterior to its rotor, two...
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4589344 |
Monorail conveyance system for wind or water powered generator apparatus
A novel wind or water powered generator apparatus is provided for generating substantial quantities of electricity. The apparatus includes a plurality of sail-driven cars connected to form a...
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4585950 |
Wind turbine with multiple generators
Multiple induction type generators are drivingly connected to an impeller. As wind velocity increases, the generators are successively activated until all of the generators are operating at a...
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4584486 |
Blade pitch control of a wind turbine
A control system for adjusting the pitch of variable-pitch angle blades in a wind turbine for generating electric power maintains the control signal for the variable-pitch angle blades above a...
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4582013 |
Self-adjusting wind power machine
A machine for economical recovery of wind power employs a self-adjusting mass-balanced aerodynamic blade weathervaning freely around a lengthwise pitching axis forward of its aerodynamic center,...
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4575639 |
Fluid turbine system
A dual solar phenomena exploiting system comprises two main elements; one represents direct solar heat into electric power converting media, and the other indirect using air or aquatic currents in...
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4572962 |
Apparatus for extracting energy from winds at high altitudes
A wind-operated power-generating module for operation at high altitudes such as 1000 meters comprising a frame structure mounting a pair of vertically-separated parallel shafts around which pass...
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4565929 |
Wind powered system for generating electricity
A fixed pitch wind turbine rotor (18) is teeter mounted (76, 78, 80) onto a low speed input shaft (44) which is connected to the input (58) of a step-up transmission (46). The output (48) of the...
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4556801 |
Method for utilizing wind energy for autonomous electricity production
A method for utilizing wind energy for electricity production based on a wind motor and an auxiliary direct current electric motor coupled by an angular speed summation mechanism to an alternating...
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4553037 |
Solar breeze power package and saucer ship
A solar breeze power package having versatile sail and windmast options useful both on land and sea and especially useful in the saucer ship type design. The Vertical Axis Wind Turbine (VAWT) of...
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4551631 |
Wind and solar electric generating plant
A wind energy collection and conversion system includes a plurality of turbine assemblies. The turbine assemblies rotate on a common axis transverse of a base. A plurality of shutter assemblies are...
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4550259 |
Device for converting wind energy into another form of energy
The invention relates to a device for converting wind energy into another form of energy comprising a plurality of propellers having equidirectional shafts, being arranged in a matrix and driving...
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4546264 |
Relating cellular energy generating and storage device
A rotating cellular energy generating device for generating electrical power for extended periods of time. The generating device characterized by having an annular rotating housing having a...
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4535252 |
Wind electric generation plant and system with improved alternator field excitation
An improvement in a wind electric generation system of the type disclosed in Jacobs et al. U.S. Pat. Nos. 4,059,771, 4,228,361, and 4,228,362, with particular reference to U.S. Pat. No. 4,228,361....
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4530688 |
File folder unfolding machine
The machine for unfolding folded file folders has a sucker member rotatable about a horizontal axis, wherein there is a suction inlet that opens to a sucker surface facing away from that axis....
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4527072 |
Divisible cabin for a windmill
A cabin for a windmill comprises inherently rigid, self-supporting, relatively disengageable parts. Cabin parts which occasionally have to be submitted for repair and/or maintenance work are...
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4524283 |
Energy converter
Described herein is a device for converting such forms of mechanical energy that comprise even slow and random movements, such as the waves of the sea, the flow of a river, the blowing of the wind,...
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4517467 |
Wind turbine with gale protection
A wind turbine with a single rotor blade drives an alternator whose output is connected to an a-c network to supply same with power when the alternator acts as a generator under the driving force...
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4516033 |
Apparatus for converting flow of water into electrical power
Apparatus for generating electrical power includes a floatable platform, which supports a plurality of water wheels. The shafts of the water wheels are interconnected in tandem for driving an...
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4511807 |
Electrical generator control system
A control system for a stand-alone electrical generator driven by a prime mover such as a wind turbine in which switches are operable in response to changes in the frequency of the generator output...
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4508973 |
Wind turbine electric generator
A wind-operated electric generator system of simple design incuding a stationary circular arrangement of segmental wind inlet passages extending around a vertical axis and having vertical inlet...
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4508972 |
Armature lift windmill
Airfoils (32) are secured to the frame (26) of a vertical axis windmill (20) to provide vertical lift to a rotatable vertical shaft (22) and to armatures (54) of electrical generators (50), thereby...
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4503673 |
Wind power generating system
Normally feathered propeller blades of a wind power generating system unfeather in response to the actuation of a power cylinder that responds to actuating signals. Once operational, the propellers...
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4499034 |
Vortex-augmented cooling tower-windmill combination
A cooling tower for cooling large quantities of effluent water from a production facility by utilizing natural wind forces includes the use of a series of helically directed air inlet passages...
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4498017 |
Generating power from wind
A wind machine turns a shaft to activate a multi-stage positive displacement pump having intake and discharge means respectively coupled to intake and discharge fluid lines in a recirculating...
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4496848 |
Device for harnessing wind energy including shock absorber
A wind energy collecting device comprise a vertical rotor and blade of which the face exposed to the wind includes cells for engulfing air currents. The blades drive a uses device through unique...
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4496847 |
Power generation from wind
A wind machine turns a shaft to activate a multistage pump having intake and discharge means respectively coupled to intake and discharge fluid lines. Control means regulates the operative...
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