Closure operator

Claim 1

AN OPERATING DEVICE FOR WINDOWS OF THE JALOUSIE TYPE COMPRISING, AN OPERATOR BAR CONNECTED TO THE PIVOTAL PANELS OF THE WINDOW FOR OPENING AND CLOSING SAID PANELS, THE WINDOW INCLUDING A JAMB ON WHICH THE OPERATING DEVICE IS MOUNTED, A FACE PLATE FIXED TO THE JAMB, A DISK ROTATIVELY MOUNTED IN THE FACE PLATE, A PIVOT PIN MOUNTED IN THE FACE PLATE AND ON WHICH THE DISK IS PIVOTALLY MOUNTED, SAID DISK HAVING AN ARM PIVOTALLY CONNECTED TO THE OPERATOR BAR, THE DISK HAVING A NOTCHED EDGE, A SPRINGBIASED DETENT FOR SELECTIVELY ENGAGING WITH ANY ONE OF THE NOTCHES IN SAID EDGE TO LOCATE THE PANELS IN ANY DESIRED POSITION, A HANDLE INCLUDING A PAIR OF PLATES BETWEEN WHICH THE DISK IN SANDWICHED, EACH OF THE PLATES HAVING AN ELONGATED SLOT IN WHICH THE PIVOT PIN IS LOCATED, SAID SLOTS PERMITTING A TRANSVERSE MOVEMENT OF THE PLATES RELATIVE TO THE DISK, THE DISK HAVING AN ARCUATE SLOT PROVIDED WITH AN OFFSET PART AT ONE END, AND A PIN EXTENDING THROUGH THE PLATES AND ENTERING SAID SLOT AND CAUSED TO ENTER THE OFFSET PART THEREOF UPON THE TRANSVERSE SHIFT OF THE PLATES PERMITTED BY THE ENGAGEMENT OF THE PIVOT PIN WITH THE ELONGATED SLOTS PROVIDED IN THE PLATES.