Abstract: A selectively openable or closeable ventilation device integrated into an article of clothing, having a first air-permeable panel integrated into the article of clothing in a frame. A second air-permeable panel (20) is slidably affixed to the frame (22), overlapping the first panel (24). The panels have complimentary openings (26) such as slits, perforations or the like that are offset in a first, closed position, and that are in vertical alignment in a second, open position wherein air may pass through the aligned openings of the panels. In an alternative embodiment a ventilation sleeve is provided extending from the device to the outside of an outer garment.

Abstract: The invention relates to a method and a system for optimised resource use of one or more selected switches in a communication network for alerting the population when an undesirable event occurs in a specific geographical area by means of messages transmitted via the switches. The switches may form a part of a fixed telephone network and/or a mobile telephone network.

Abstract: A fan including a plurality of spaced fan bodies that rotate in a substantially cylindrical cavity having inlet and outlet openings for tangential intake and discharge of the fluid, the fan bodies comprising substantially disc-shaped bodies that extend in a substantially radial direction from the shaft and are positioned on the shaft such that the shaft runs through the centre of the fan bodies and in such a manner that a void is formed between two neighbouring fan bodies, and wherein each fan body is connected to the shaft or to a spacer only, and wherein the fan bodies are provided with flow elements on both of their radially extending faces, the flow elements consisting of curved projections, the curved projections being curved forwardly as compared to the direction of rotation of the fan bodies and the curved projections extending between two imaginary circles on the fan bodies' radially extending faces having radii r1 and r2 respectively, wherein r1<r2, the radius r1 is larger than the outer radius of

Abstract: A device for obtaining circulation of air, a method for mounting the device and a use of the device. For a number of applications there is a need for a cold or warm curtain of air, for example to ensure adequate chilling of food products in a refrigerated/freezer counter. It is an object of the present invention to provide a fan which can be adapted to the individual site regarding fluid curtain length/width by varying the length of the shaft and the number of fan bodies on the shaft.

Abstract: The invention relates to a method and a system for optimised resource use of one or more selected switches in a communication network for alerting the population when an undesirable event occurs in a specific geographical area by means of messages transmitted via the switches. The switches may form a part of a fixed telephone network and/or a mobile telephone network.