Abstract: A contactless electric control handle having a field coil for forming an electro-magnetic field, inductive pick-up coils angularly spaced apart around the axis of the field. The rod of the control handle constitutes the core of the field coil. The field coil and the pick-up coils have the shape of annular, concentric conductors, whereas ferrite is applied to the rod in order to employ high frequencies up to 1 MHz.

Abstract: Contactless, electric control-handle comprising a field coil provided with a core for producing an alternating, electro-magnetic field, pairwise series connected, inductive pick-ups angularly spaced apart and each having a core, and an actuating-rod subjected to a bias stress directed towards a neutral position and connected with a core of the field coil to affect the alternating, electro-magnetic field such that there is a linear relation between the displacement of the actuating rod and the output signal of the inductive pick-ups.

Abstract: A control system, more particularly for the electric motors driving a vehicle for the disabled, comprising a control member for delivering a required speed signal which varies linearly with the position of the control member, a feed back control circuit for each motor, a power supply for the motor and the control circuits, the linear speed signal is compared with a signal selected, on the basis of the instantaneous speed of the motor, to form a number of signal which are stored in a memory, and for forming a control signal which does not vary linearly with the speed signal. The control signal is fed to the motor control circuit to keep the rotation of the motor constant.