Abstract: A cross flow wind turbine comprising a rotor mounted for rotation about a vertical axis and a plurality of blade assemblies mounted on the rotor. Each blade assembly comprises a blade of aerofoil section mounted vertically for pivotal movement about a vertical shaft. The turbine also includes a device for measuring the direction of the apparent fluid velocity, a shaft encoder for measuring the blade angle and a control system to set the blade angle such that the lift component of the aerodynamic forces on the blade contributes positively to the driving torque on the rotor.

Abstract: A connector apparatus which is useful in testing electrical circuits where it is desired to mate test equipment to conventional integrated circuit sockets is disclosed. Spring probes make electrical contact with integrated circuit socket pins. J-shaped members of the apparatus have fingers which engage conventional integrated circuit sockets between the socket and a circuit board to clamp the apparatus to the socket. Fasteners lock the apparatus in this clamped position.