Abstract: A ceiling system which includes a plurality of grid elements which form a grid framework and a plurality of downwardly accessible ceiling panels. The ceiling panels include a substrate and at least two mounting members. Each mounting member cooperates with the substrate to provide strength and rigidity characteristics to the substrate and to form a grid receiving cavity. Each mounting member further cooperates with a grid element to accurately position the panel relative to the grid framework. When installed, the system provides no visual indications on how the ceiling panel can be removed.

Abstract: A ceiling system which includes a plurality of grid elements which form a grid framework and a plurality of downwardly accessible ceiling panels. The ceiling panels include a substrate and at least two mounting members. Each mounting member cooperates with the substrate to provide strength and rigidity characteristics to the substrate and to form a grid receiving cavity. Each mounting member further cooperates with a grid element to accurately position the panel relative to the grid framework. When installed, the system provides no visual indications on how the ceiling panel can be removed.

Abstract: An apparatus and system to secure a panel to suspended ceiling system which includes a plurality of suspension elements. The apparatus is a border structure that enables attachment of the panel to the suspension element. The border structure includes a plurality of horizontal surface members and a plurality of vertical sections, with a first horizontal surface member being inserted into a hanger secured to the suspension element, and with a second horizontal surface member supporting an end of a panel. At least one vertical section joins the plurality of horizontal surface members. A spring hold down clip secures the panel from unintended displacement during a seismic event.

Abstract: An apparatus and system to secure a panel to suspended ceiling system which includes a plurality of suspension elements. The apparatus is a border structure that enables attachment of the panel to the suspension element. The border structure includes a plurality of horizontal surface members and a plurality of vertical sections, with a first horizontal surface member being inserted into a hanger secured to the suspension element, and with a second horizontal surface member supporting an end of a panel. At least one vertical section joins the plurality of horizontal surface members. A spring hold down clip secures the panel from unintended displacement during a seismic event.

Abstract: A ceiling system including a plurality of grid members forming a grid network and a plurality of panels capable of being installed and positioned into the grid network from below. The panels have hook members mounted thereto which cooperate with the panel to form a grid receiving cavity. The hook member has a hook section provided thereon, such that when the ceiling panel is positioned within the grid network, the hook section and a grid flange cooperate to accurately position the panel relative to the grid network. During installation, the panel is self-aligning. When installed, the system provides no visual indications on how the panel can be removed.

Abstract: The present invention relates to an electrical joint compound for use in tubular compression connectors generally of aluminum or copper, and is particularly useful for joining large, stranded or solid, underground, electrical power cable and terminations of cable in high-voltage potheads. The electrical joint compound is a thermosetting hardenable resin system such for example as epoxy or polyester, which contains sufficient fine metal particles to make the resin semi-conducting and also contains coarse metal particles of irregular shape which because of their size and shape break through any oxide surface such as occurs particularly on aluminum conductors during compression, and allow a metal-to-metal contact to be made between connector and conductor strands and between contiguous conductor strands. The combination of the coarse and the fine particles in a hard, semi-conducting resin provide a synergistic effect which gives a stable, low resistance, compression connector joint not heretofore available.

Abstract: The present invention relates to an electrical joint compound for use in tubular compression connectors generally of aluminum or copper, and is particularly useful for joining large, stranded or solid, underground, electrical power cable and terminations of cable in high-voltage potheads. The electrical joint compound is a thermosetting hardenable resin system such for example as epoxy or polyester, which contains sufficient fine metal particles to make the resin semi-conducting and also contains coarse metal particles of irregular shape which because of their size and shape break through any oxide surface such as occurs particularly on aluminum conductors during compression, and allow a metal-to-metal contact to be made between connector and conductor strands and between contiguous conductor strands. The combination of the coarse and the fine particles in a hard, semi-conducting resin provide a synergistic effect which gives a stable, low resistance, compression connector joint not heretofore available.