Patent ID: 7191817

Claim:
A system for operating a blind in a glass-enclosed chamber, comprising two panes of glass, and a frame having an upper section, a lower section and two lateral sections joined together by four corner pieces, the system comprising an upper fixed box which is fixed to the upper section of the frame and holds one end of the blind; a movable box which holds another end of the blind and is elongated; a pulling device extending through a pane and operating said movable box; and a guiding device for translating said movable box parallel to a direction of elongation of said movable box when the blind is being opened or closed, wherein said device for pulling said movable box includes a first means and a second means for generating reciprocal magnetic attraction, said first means being fixed to said movable box, said second means having a free knob so that, through one pane of the glass-enclosed chamber, said knob cooperates with said first means fixed to said movable box to open or close the blind, wherein said first means fixed to said movable box include a parallelepiped box inserted in a center of said movable box, a small box housing, a cage, permanent magnets placed side-by-side between two sets of free rollers, longitudinal pins passing through an external surface of said permanent magnets and from a front of said box to assist said first means to slide over a glass pane.