Automatic venetian blinds

Claim 1

IN AN AUTOMATICALLY CLOSING VENETIAN BLIND STRUCTURE FOR BUILDING WINDOWS HAVING AN UPPER BASE ADAPTED TO BE SECURED ADJACENT TO THE UPPER PORTION OF SAID WINDOW, A MAIN SLAT ROTATABLY SUPPORTED AND DEPENDING FROM SAID BASE, A PLURALITY OF LADDER TAPES SECURED TO AND DEPENDING FROM SAI MAIN SLAT, A PLURALITY OF SLATS SUPPORTED BY SAID LADDER TAPES WHEREBY, WHEN SAID MAIN SLAT IS ROTATED, SAID TAPE SUPPORTED SLATS WILL BE ROTATED TO A CORRESPONDING DEGREE, A PLURALITY OF CORDS DEPENDING FROM SAID BASE AND CONNECTED WITH THE LOWEST OF SAID TAPE SUPPORTED SLATS FOR RAISING AND LOWERING SAID BLIND, A RELEASABLE CORD LOCK INCLUDING A PIVOTED LEVER ASSOCIATED WITH SAID PLURALITY OF CORDS FOR HOLDING SAID BLIND IN A RAISED POSITION WITH RESPECT TO THE BOTTOM OF SAID WINDOW, A SINGLE CORD CONNECTED TO SAID MAIN SLAT ADAPTED TO ROTATE SAID MAIN SLAT FROM A HORIZONTAL POSITION TO A NEAR-VERTICAL POSITION WHEREBY SAID BLIND MAY BE OPENED OR CLOSED, MEANS CONNECTED TO SAID BASE FOR BIASING THE MAIN SLAT TO THE NEARVERTICAL CLOSED POSITION; A RELEASABLE CORD LOCK ASSOCIATED WITH SAID SINGLE CORD FOR HOLDING SAID CORD IN A SELECTED POSITION AGAINST THE BIASING EFFECT OF THE BIASING MEANS WHEREBY SAID SLATS CAN BE MAINTAINED IN AN OPENED CONDITION, AND AN ELECTRO-MECHANICAL CONTROL UNIT SUPPORTED BY SAID BASE AND MEANS CONNECTING SAID CONTROL UNIT WITH SAID CORD LOCKS, SAID CONTROL UNIT BEING ADAPTED, UPON THE RECEIPT OF AN ELECTRICAL IMPULSE, TO OPEN SAID CORD LOCKS, THEREBY CAUSING THE BLINDS TO BE LOWERED AND ALLOWING THE BIASING MEANS TO CLOSE THE MAIN SLAT AND SAID TAPE SUPPORTED SLATS.