Patent ID: 6837295

Claim:
An adjustable curtain for a double pane window, comprising: a) an adjustable curtain installed between panes of a sealed double pane window, the adjustable curtain including 1) a group of slats; 2) a rotatable shaft; and 3) a pull cord, operably connected to the slat group and the rotatable shaft; and b) a magnetic transmission system configured to move the slat group to selectively block or unblock passage of light through the window, including: 1) a first magnetic wheel, fixed on the rotatable shaft inside the sealed double pane window; and 2) a second magnetic wheel, disposed outside the double pane window, having an axis of rotation parallel to the rotatable shaft, magnetically coupled to the first magnetic wheel, such that rotation of the second magnetic wheel causes corresponding rotation of the first magnetic wheel and the rotatable shaft, so as to wind or unwind the pull cord.