Drive device and a method of producing the same

Claim 1

A DRIVE DEVICE COMPRISING AN ELONGATED ROTARY DRIVE SHAFT HAVING A PORTION FORMED WITH AN AXIALLY EXTENDING GROOVE, SAID DRIVE SHAFT HAVING AT SAID PORTION THEREOF A PAIR OF LONGITUDINALLY EXTENDING SHOULDERS DEFINING OPPOSITE SIDES OF SAID GROOVE, RESPECTIVELY, STATIONARY TUBULAR HOUSING PART COXIALLY SURROUNDING AND SAPCED FROM SAID PORTION OF SAID DRIVE SHAFT, A BRAKE SPRING COILED ABOUT SAID PORTION OF SAID DRIVE SHAFT IN THE INTERIOR OF SAID HOUSING PART AND HAVING A REST POSITION WHERE THE CONVOLUTIONS OF SAID SPRING PRESS AGAINST AN INNER SURFACE OF SAID HOUSING PART, SAID SPRING HAVING A PAIR OF FREE ENDS EXTENDING INTO SAID GROOVE AND RESPECTIVELY LOCATED ADJACENT SAID SIDES THEREOF SO THAT DEPENDING UPON THE DIRECTION OF ROTATION OF SAID SHAFT ONE OR THE OTHER OF THE SHOULDERS THEREOF WILL DISPLACE AN END OF SAID SPRING TO RELEASE THE LATTER FROM SAID INNER SURFACE OF SAID HOUSING PART, A ROTARY DRIVEN ELEMENT SURROUNDING AND FREELY TURNABLE WITH RESPECT TO SAID SHAFT ADJACENT SAID PORTION THEREOF, AND AN ELONGATED MOTION-TRANSMITTING ELEMENT FIXED TO SAID DRIVEN ELEMENT AND EXTENDING THEREFROM AXIALLY ALONG SAID SHAFT INTO SAID GROOVE THEREOF, SAID MOTION-TRANSMITTING ELEMENT HAVING A WIDTH LESS THAN THAT OF SAID GROOVE SO THAT FIRST A SHOULDER OF SAID PORTION OF SAID SHAFT WILL DISPLACE AN END OF SAID SPRING TO RELEASE THE LATTER FROM SAID HOUSING PART AND THEN SAID LATTER SHOULDER WILL ENGAGE SAID MOTION-TRANSMITTING ELEMENT TO TRANSMIT ROTARY MOVEMENT OF SAID SHAFT THROUGH SAID MOTIONTRANSMITING ELEMENT OF SAID DRIVEN ELEMENT.