Venetian blind

Claim 1

IN A VENETIAN BLIND HAVING AN UPPER SUPPORTING BAR, A PLURALITY OF SUPERIMPOSED SLATS, FLEXIBLE STRAPS CONNECTING SAID SLATS TO SAID UPPER SUPPORTING BAR, A CORD-LIKE PUSH-PULL ELEMENT HAVING ONE END PORTION EXTENDING THROUGH SAID SLATS AND ATTACHED TO THE LOWERMOST SLAT, A CABLE COVERING ENCLOSING AND GUIDING SAID PUSH-PULL ELEMENT, AN OPERATING MECHANISM MOUNTED AT A POINT REMOTE FROM SAID BLIND AND HAVING A SHAFT, A ROPE PULLEY HAVING CORRUGATED SIDES MOUNTED ON SAID SHAFT, THE OTHER END PORTION OF SAID PUSH-PULL ELEMENT BEING HOOKED AROUND SAID PULLEY, A SOURCE OF POWER FOR ROTATING SAID ROPE PULLEY IN EITHER DIRECTION FOR OPENING AND CLOSING SAID BLIND, SAID SOURCE OF POWER COMPRISING AN ELECTRIC MOTOR HAVING A SHAFT, A SPEED REDUCTION GEAR DRIVINGLY CONNECTING SAID MOTOR SHAFT AND SAID PULLEY SHAFT, A PINION ON SAID PULLEY SHAFT, A THIRD SHAFT HAVING A GEAR WHEEL WITH PROJECTIONS MOUNTED THEREON WITH SAID GEAR WHEEL ENGAGING SAID PINION, A DISC ROTATABLY MOUNTED ON SAID THIRD SHAFT AND HAVING AN ARCUATE SLOT THEREIN, SAID PROJECTIONS ON SAID GEAR WHEEL ENGAGING WITH THE CERTAIN AMOUNT OF END PLAY INTO SAID ARCUATE SLOT, SAID DISC ALSO HAVING A PROJECTION THEREON, A PIVOTALLY MOUNTED SWITCH LEVER HAVING A BIFURCATED END ENGAGEABLE WITH SAID PROJECTION ON SAID DISC, AND MEANS OPERATED BY SAID SWITCH LEVER FOR INTERRUPTING THE MOTOR CIRCUIT AND FOR SIMULTANEOUSLY REVERSING THE CIRCUIT CONNECTION SO THAT WHEN SAID MOTOR IS AGAIN SWITCHED ON IT WILL ROTATE IN THE OPPOSITE DIRECTION.