Robots

A robot comprising a chain of members connected in pairs and mobile with respect to one another and having a terminal member, a single motor and a selection means adapted to be controlled by a computer and a single monitoring coder whereby the motor drives selectively, by means of the selection means, each of the mobile members separately in a movement, for driving the terminal member of the chain in a determined movement, biasing means being provided for biasing each of said mobile members to rest position defined by the contact of two abutments, the motor acts positively in one direction to selectively actuate each of said mobile members against the action of said biasing means, and said members comprise a first plate rotatably mounted on a first shaft parallel to the axis of the motor, a second plate secured to a second shaft parallel to the axis of the motor, a deformable parallelogram connecting the two plates, a biasing member biasing the parallelogram to its rest position, a first drive drum fixed on the axis of the motor, a second drum mounted idle on the shaft of the first plate, a third drum fixed on the shaft of the second plate, a flexible drive cable fixed, at one of its ends, to said third drum, while being wound over at least one turn, on said second drum, and fixed, at the other of its ends, on said first drum, while being wound over several turns, the winding of the cable being such that a pull exerted on this cable by said first drive drum selectively provokes, via said selection means, either the rotation of said first shaft and therefore of said first plate, or that of said second shaft, or the deformation of said parallelogram, against the action of said biasing member.