Abstract: This invention relates to a paying out device comprising, in the direction of unwinding of a filament, at least one wire clamp, an optional return pulley, a brake pulley and a sliding pulley mounted on one end of a dynamometer arm, the other end of which has a graduated sector with a mechanism for positioning the point of attachment of one end of the dynamometer spring. The opposite end of the spring acts on a system of regulating the braking torque. The dynamometer arm is mounted so as to occupy a working position substantially along one edge of the frame, while an output pulley is arranged with respect to the brake pulley and the arm such that, in the working position of the latter, the filament substantially forms a right angle between the brake pulley and the output pulley, passing through the pulley of the dynamometer arm in the working position.