Swivel mount for windows

Claim 1

IN A SWIVEL STRUCTURE FOR HINGING THE CENTRAL PORTION OF AN EDGE OF A WINDOW CASEMENT TO THE CORRESPONDING PORTION OF AN OUTER WINDOW FRAME TO MOUNT THE CASEMENT FOR 180* ROTATION RELATIVE TO THE FRAME, AN OUTER PLATE ADAPTED TO BE SECURED TO THE INNER EDGE OF SUCH AN OUTER WINDOW FRAME, AN INNER PLATE ADAPTED TO BE SECURED TO THE OUTER EDGE OF SUCH A WINDOW CASEMENT, A RIGID STRAPLIKE LINK, MEANS CONNECTING ONE END OF SAID LINK PIVOTALLY TO SAID OUTER PLATE TO MOUNT SAID LINK ON ONE SIDE OF SAID OUTER PLATE, MEANS CONNECTING THE OTHER END OF SAID LINK PIVOTALLY TO SAID INNER PLATE TO MOUNT SAID INNER PLATE ON THE SIDE OF SAID LINK OPPOSITE TO THE SIDE OF SAID LINK ADJACENT TO SAID OUTER PLATE SO THAT SAID LINK LIES BETWEEN SAID PLATES, FIRST STOP MEANS LIMITING PIVOTAL MOVEMENT OF SAID LINK AND SAID OUTER PLATE THROUGH A FIRST RANGE OF SUBSTANTIALLY 90*, SECOND STOP MEANS LIMITING PIVOTAL MOVEMENT BETWEEN SAID LINK AND SAID INNER PLATE THROUGH A SECOND RANGE OF SUBSTANTIALLY 90*, AND MEANS FOR PREVENTING PIVOTAL MOVEMENT BETWEEN SAID LINK AND SAID INNER PLATE EXCEPT WHEN SAID LINK IS IN A POSITION RELATIVE TO SAID OUTER PLATE AT ONE END OF SAID FIRST RANGE, SAID LINK BEING OF SUCH A WIDTH AND SO CONNECTED TO SAID PLATES AND SAID PLATES BEING ADAPTED TO BE SO FASTENED TO THE WINDOW FRAME AND CASEMENT THAT SAID LINK LIES WHOLLY WITH THE PROJECTED AREA OF THE CASEMENT WHEN THE CASEMENT IS IN A CLOSED POSITION RELATIVE TO THE FRAME.