Abstract: Installation for air-conditioning by absorption, having a high-pressure enclosure 1 containing a heater heated to high temperature, in which a refrigerating fluid is driven by vaporation to form a gaseous refrigerant, and a condenser on which the refrigerating fluid is liquified; a low-pressure enclosure 2 containing an evaporator on which the liquified refrigerant is vaporized for producing a desired cold and an absorber on which the gaseous refrigerant is re-absorbed in the depleted solution before being returned to the heater via a pump; the high-pressure enclosure 1 and the low-pressure enclosure 2 each having a generally toric-shaped casing with a common vertical axis, said high-pressure enclosure 1 being located above said low-pressure enclosure 2; a high-pressure and a low-pressure central free space in each enclosure, the high-pressure central free space in the high-pressure enclosure is de-limited by central cylindrical wall 1a, and the low-pressure central free space in the low-pressure enclosure is

Abstract: This invention relates to an apparatus emitting electromagnetic radiation, particularly infrared, which comprises a cylindrical source of rays and a reflector. In order to avoid the problem due to captive rays and to multiple reflections, the cross section of a half-reflector comprises, starting from the plane of symmetry, a first curved part constituted by an arc of involute to a circle extending from the plane of symmetry to an end located on a first extreme ray tangential to the source and passing through a first end of the target and a second curved part joined tangentially to the first curved part and of such shape that all the tangential rays emitted from the cylindrical source and falling on this second curved part are reflected towards the first end of the target located on the other side of the plane of symmetry.

Abstract: This invention relates to an apparatus emitting infrared radiation which comprises a plane source of infrared rays and a reflector. In order to avoid the problem due to captive rays and to multiple reflections, the cross section of each half-reflector located on one side of the plane of symmetry has the form of an arc of ellipse whose two foci are respectively constituted by the first end of the plane source and the first end of the target which are both located on the other side of the plane of symmetry, this arc of ellipse extending between the second end of the plane source and the point of intersection of the ellipse with the direct ray going from the first end of the plane source to the second end of the target.