The present invention relates to an electroluminescent element formed by placing a luminescing substance between an anode and a cathode, such that when electrical energy is applied to the element, light is emitted having a peak wavelength of at least 580 nm. The luminescing substance comprises a fluorescent compound have a fluorescent maximum at about 540 nm or above and a compound having a pyrromethene structure (I) or metal complexes thereof.

Various application are provided for an enclosure having a first wall and two or more second walls surrounding a cavity. The enclosure also has an inlet and outlet each in fluid communication with the cavity. The second walls each have at least a portion shaped such that a force acting on the first wall tending to deflect the element causes an amplified deflection of the second walls into the cavity. Such applications include a pump, a structure comprised of one or more enclosures, structural el...

The invention concerns a building element[which is a stud (10) having a number of channels (12). Each channel can receive a cooperating means (14) which can be used to mount a panel or bracket on the stud. The invention also concerns a building element which is a joining clip (16) which can be connected to a panel or bracket. The joining clip includes the cooperating means (14) for mounting a panel or bracket on the stud. The invention also concerns a building element which is a joining element ...

A hollow building element (10) of plastics material comprises one or more longitudinal ducts (30) and has at opposite sides thereof, coupling members (32, 34), whereby elements are connectable to each other directly or indirectly, wherein lower coupling members (34A, 34B) comprise ducted flanges (42, 50 respectively). Building structures comprise such hollow building elements (10) coupled side by side.

A film formed by stretching and heat-fixing a melt of a polyester and a polyolefin which has a melting temperature lower than that of the polyester is employed as a support for a diffusive transfer-type photothermographic material, which prevents processing unevenness and white spot.

A packing element for fluid-fluid contact apparatus is of generally tubular form, having a cylindrical wall in which two rows of apertures are formed. The first of the rows includes a plurality of apertures formed circumferentially in the wall, and the second of the rows, longitudinally spaced from the first row, includes a second plurality of apertures distributed circumferentially around the wall. First and second pluralities of tongues associated with the apertures respectively extend inwardl...

A stressed element having a relatively rigid, imcompressible body combined with one or more internal or external tensioning strands, each comprising a multiplicity of synthetic organic fibers such as nylon, polyester, polypropylene or the like, having a high recoverable stretch, the tensioning strands being maintained in intimate association with the rigid body and in highly elongated tensioned condition to compress the body and so stress the element.

A fire resistant sweeping element comprising a filamentary mixture of polyvinyl chloride filaments and polypropylene filaments, the polyvinyl chloride filaments being included in an amount sufficient to restrain combustion of the polypropylene filaments.

A filter element comprising a panel and a surround to the panel, the surround being shaped for support in a supporting frame of a filter assembly. The panel embodies flow paths allowing fluid flow in the general direction of the plane of the panel and communicating with a drainage channel in the surround. The latter further embodies a caulking groove adapted to retain a sheet of filter material so that the latter overlies the panel.

In the method of consolidating rock strata which involves securing, in an oversized borehole drilled therein, a fixing element such as an anchor bolt by means of a synthetic resin-based composition contained in one or more frangible cartridges which are destroyed in the borehole by the rotation of the fixing element, there is employed a longitudinally extending fixing element having a shank which is provided with a longitudinally extending collar so as to reduce the volume of the annular space b...