Means for changing the drive of a screen wiper from constant to intermittent wiping, more especially for motor vehicles

Claim 1

MEANS FOR CHANGING OVER THE DRIVE OF A VEHICLE SCREEN WIPER FROM CONTINUOUS TO INTERMITTENT WIPING AND VICE VERSA, COMPRISING A WIPER SHAFT, A DRIVING GEAR FOR SAID SHAFT, A CYLINDRICAL PROJECTION WITH A CENTRAL BORE IN THE MIDDLE OF SAID DRIVING GEAR, SAID WIPER SHAFT BEING MOUNTED IN SAID BORE, TWO DRIVER LEVER OF DIFFERENT THICKNESS ECCENTRICALLY MOUNTED ON OPPOSITE SIDES OF SAID BORE SO THAT SAID LEVERS, UNDER SPRING PRESSURE CAN SWING OUT THROUGH A SMALL ANGLE BEYOND THE PERIPHERY OF SAID CYLINDRICAL PROJECTION TO ENGAGE A DRIVER FOR THE WIPER SHAFT WHEN THE DRIVING GEAR IS ROTATED, ONE OR OTHER OF THE DRIVER LEVERS ENGAGING SAID DRIVER TO ROTATE THE WIPER SHAFT EITHER INTERMITTENTLY OR CONTINUOUSLY ACCORDING TO THE DIRECTION OF ROTATION OF THE DRIVING GEAR, A DRIVING PIN BEING FIXED ON THE DRIVING GEAR ADJACENT THE CYLINDRICAL PROJECTION THEREON WHICH ENGAGES IN RADIAL SLOTS IN THE STAR WHEEL OF A GENEVA MOVEMENT, THE AXIS OF WHICH EXTENDS PARALLEL TO THE WIPER SHAFT, AND A SLIDE DISC WITH A PERIPHERAL RECESS BEING FIXED COAXIALLY TO THE SAID STAR WHEEL TO HOLD THE THICKER OF THE TWO DRIVER LEVERS IN ITS INWARDLY SWUNG NEUTRAL POSITION AND ONLY TO RELEASE SAID LEVER FOR OUTWARD SWINGING MOVEMENT, TO EFFECT INTERMITTENT WIPING, IN A POSITION OF THE STAR WHEEL IN WHICH SAID RECESS IS ADJACENT SAID LEVER.