1. A DRIVING DEVICE COMPRISING A VIBRATING ELEMENT HAVING VIBRATIONS WHICH ARE MAINTAINED ELECTRICALLY, A POWER TAKE-OFF ARBOR, A ROTOR FOR DRIVING SAID ARBOR, AND DRIVE MEANS INCLUDING A WINDABLE SPRING ELEMENT COUPLED TO SAID ROTOR AND RESISTING ROTATION THEREOF, SAID SPRING ELEMENT BEING COUPLED TO THE ARBOR TRANSMIT DRIVE FROM THE ROTOR TO THE ARBOR, AND A RATCHET AND PAWL DEVICE CONNECTING THE VIBRATING ELEMENT WITH THE ROTOR TO TRANSMIT DRIVE THEREBETWEEN, SAID DRIVE MEANS CAUSING THE ROTOR TO ROTATE STEP-BY-STEP THROUGH AN ANGULAR VALUE GREATER THAN THE PITCH OF THE RATCHET AND PAWL DEVICE UNIT THE SPRING ELEMENT HAS BEEN WOUND TO A PREDETERMINED RESISTANCE WHEREUPON THE ROTOR IS THEN DRIVEN IN OSCILLATION ALTERNATELY BY THE VIBRATING ELEMENT AND THE SPRING ELEMENT THROUGH AN ANGULAR MOVEMENT WHICH IS LESS THAN THE PITCH OF THE RATCHET AND PAWL DEVICE.