Abstract: A window blind material and window blind assembly is formed by a front sheet and a rear sheet, both of translucent or transparent light transmitting material. A plurality of spaced, intermediate, parallel, preferably opaque or semi-opaque, vanes are secured between the sheets. The vanes can be positioned to control the transmission of light by movement of the sheets relative to one another. A tilt member connected to the sheets is rotated to position the sheets and vanes. A bottom rail is secured to the sheets.

Abstract: A covering for an architectural opening such as a window or door is in the form of a vertically oriented fabric assembly having front and rear sheer fabrics interconnected by vertically extending vanes. The vanes can be tilted through a series of carriers mounted on a track rail from which the covering is suspended in order to adjust the spacing between the fabrics between open and closed positions and adjust the light transmitting characteristics of the covering. The covering can be extended across the opening by separating the carriers on the track rail and can be contracted by stacking the carriers toward one end of the track rail. A unique design of carrier allows the covering to fold on itself in the contracted state, in the manner of a conventional drape.

Abstract: A covering for an architectural opening such as a window or door is in the form of a vertically oriented fabric assembly having front and rear sheer fabrics interconnected by vertically extending vanes. The vanes can be tilted through a series of carriers mounted on a track rail from which the covering is suspended in order to adjust the spacing between the fabrics between open and closed positions and adjust the light transmitting characteristics of the covering. The covering can be extended across the opening by separating the carriers on the track rail and can be contracted by stacking the carriers toward one end of the track rail. A unique design of carrier allows the covering to fold on itself in the contracted state, in the manner of a conventional drape.

Abstract: A target detector (1) for detecting targets provided with transmitter means (3, 5) for simultaneous generation of different electromagnetic waves having different frequencies which are transmitted by means of an emission and detection device (2). The target detector is also provided with receiving means (3, 4, 5) for obtaining, by means of the emission and detection device (2), target signals comprising target information received at different frequencies. A signal processing unit (15, 16, 17) is provided for processing the target signals in combination to obtain target-representing signals.