Abstract: A single gun color cathode ray tube (CRT) having a screen consisting of alternating red, blue and green vertical phosphor strips in groups of three, with strips of conductive or photovoltaic material overlaying each phosphor strip, or placed between adjacent strips. The same color conductive strips are connected in parallel in three arrays, and connected to three individual trigger buses. The conductive lines are connected to a positive bias voltage such that when the electron beam within the CRT strikes a conductive strip, a pulse is generated and fed to the corresponding trigger bus. As the single electron beam scans the screen, trigger pulses are generated in the conductive strips and are fed to a trigger pulse amplifier and then to a multiplexer and used as control signals.

Abstract: An electrical junction box for supplying electrical power to a multiplexer or other device used in an underfloor cable distribution system is mounted remotely from a trench used to feed electrical cables to the system in order to increase trench capacity.

Abstract: A safety barrier assembly for a building under construction comprises a continuous barrier in sheet form having a height several feet above the floor and a toeboard secured to a cable spaced only a few inches from the floor, the free end of the toeboard lying on but being unsecured to the floor.

Abstract: The underfloor assembly for a building comprises corrugated metal flooring units preferably side-by-side with cable distribution ducts, over which is mounted cable trenches. Each distribution duct has a bottom plate and a preferably inverted U-shaped top, the tops extending between adjacent intersections of the trench with the ducts to thus leave the duct open under the trenches. The bottoms of the trenches are open where they intersect the ducts, and the trenches are formed by field assembly of trench subunits that have a U-shaped bottom pan with cut-outs on either side of a preferably centrally located bottom portion, as well as a cover removably closing the pan.

Abstract: The underfloor assembly for a building comprises corrugated metal flooring units preferably side-by-side with cable distribution ducts, over which is mounted cable trenches. Each distribution duct has a bottom plate and a plurality of closed cells with less than all of the cells having portions cut away to thus leave free areas under the trenches. An opening is provided in the bottom plate at a desired free area, and an open pan extends through the opening and below the bottom plate. The bottoms of the trenches are open where they intersect the ducts to provide access to the pans as well as to provide access between the trenches and the ducts and additional space below the trench to accommodate splices and bends in the cables. The pans can also be accessed from the floor below via the ceiling suspended below the pans.

Abstract: The underfloor assembly for a building comprises corrugated metal flooring units preferably side-by-side with cable distribution ducts, over which is mounted cable trenches. Each distribution duct has a bottom plate and a plurality of inverted U-shaped members with less than all of the members having portions cut away to thus leave the members open under the trenches. The bottoms of the trenches are open where they intersect the ducts, thereby providing easy access between the trenches and the ducts and additional space below the trench to accommodate splices and bends in the cables.

Abstract: The underfloor assembly for a building comprises corrugated metal flooring units preferably side-by-side with cable distribution ducts, over which is mounted cable trenches. Each distribution duct has a bottom plate and a preferably inverted U-shaped top, the tops extending between adjacent intersections of the trench with the ducts to thus leave the duct open under the trenches. The bottoms of the trenches are open where they intersect the ducts, and the trenches are formed by field assembly of trench sub-units that have a U-shaped bottom pan with cut-outs on either side of a preferably centrally located bottom portion, as well as a cover removably closing the pan.