Abstract: An electrically operated pulse motor having a stator and a rotor mounted within a chassis, the ends of the shaft of the rotor having been mounted in a pair of sleeves joined to the chassis, the inner diameter of the sleeves being larger than the diameter of the ends of the rotor shaft. The ends are connected with a pair of projecting semi-axles (axle shafts) of the rotor that are eccentric in relation to the shaft of the rotor and of a larger size than the aforementioned difference between the diameter of the rotor shaft and the inner diameter of the sleeve, the eccentricity between the projecting semi-axles and the rotor shaft being absorbed by means of the interposition of elastic couplings that change their shape during the operation of the motor.