Abstract: An airflow power station preferably comprises a windmill engine rotatable by wind including a main shaft and a rotational speed sensor, a compressed-air tank, a compressor charging the tank, an electric generator, a flywheel conveying rotation to the compressor and to the generator, and two pneumo-cylinders with pistons and sensors sensing their initial and ending positions. Each piston is coupled with a rod hingedly associated with a clutch controllably engaging and disengaging the piston with the flywheel. Each pneumo-cylinder is divided into an inner and an outer chamber, pneumatically communicating with the tank via an intake valve controllably supplying compressed air and a pneumo-regulator controllably switching the airflow ‘on’ and ‘off’ depending on the rotational speed of main shaft. Each pneumo-cylinder includes a reverse spring disposed in the inner chamber thereof, compressed during a work stroke of the piston and released upon return of the piston into its initial position.

Abstract: A frost-resistant windmill is disclosed to provide supplemental power supply for use preferably in large cities. The frame of the windmill carrying a plurality of blades is made hollow defining a serpentine internal air pathway adapted for introduction of warm air from an external source to prevent freezing when used during winter months. A centrifugal speed adjustment system is provided to reduce rotation speed fluctuations of the load drive shaft when strong wind gusts are encountered. A speed adjustment weight is connected to the drive wheel through a cable such that the position of the drive wheel along the radius of the windmill is defined by an equilibrium between the pull force on the cable and the compression force of the spring urging the drive wheel towards the periphery the windmill.

Abstract: The Mark BELA-I Solar Engine converts solar energy into continuous mechanical movement.

Abstract: Field of the Invention This invention represents a rotor-type wind turbine with “scale” type double-blade wings. The name of “scale” or “scales” is given to the vertical swinging plates in the vanes of the windmill because they are located so as to overlap one another. The wind turbine converts the energy of the wind into mechanical energy. In construction the turbine consists of a vertical shaft running in ball bearings under the force of the wind impinged on the horizontal wings located and connected at right angle with the vertical shaft. Each wing is divided by the vertical shaft into two vanes. Each vane is fitted with a few stationary vertically-disposed posts, and each post has a hinged vertical “scale”, whereby the direction of rotation of the vertical shaft does not depend on the direction of the wind. Through a friction drive the vertical shaft transmits rotation to the secondary (driven) mechanism which is located horizontally.