Abstract: A mounting system for data communications connectors comprising a body portion, formed as a substantially rectangular frame (1) defining a central void; the frame having a depth not less than the depth of a flange of a standard 25 pin D type connector; at least one end of the frame, when viewed in elevation, displaying a wide substantially "U" shaped cut-out (7) open to the upper surface of the frame; guide channels (8) on each of the two opposing sides of the "U" shaped cut-out adapted to releasably receive and guide a peripheral portion (12) of an adaptor plate (11) slidably introduced from the open end of the "U" shaped cut-out, the guide channel serving to locate the flange of the adaptor plate so as to fill in the "U" shaped cut-out whilst preventing movement with respect to the frame perpendicular to the direction along which the adaptor plate has been slidably introduced the frame, a cover plate (19) for the upper surface of the frame such cover plate extending at least in part over an area above the g

Abstract: Three service access units are mounted on a cellular raceway. A bracket inside of the unit is mounted on the power cell. The bracket offers no interference with the passage of communication cable. This bracket carries plural duplex receptacles accessible through the open top of the unit.

Abstract: The present invention discloses a poke-through connector assembly which may be assembled in an aperture within a concrete floor from only one side thereof. The connector includes a molded basket of electrical and thermal insulating material having an upper surface joined to a lower surface by integral columns. A flange extending from the upper surface prevents the connector from passing through the floor aperture, while a spring clip attached to the lower surface of the basket prevents the withdrawal of the connector. An electrical conduit is attached to the lower surface of the basket by the spring clip. Intumescent material placed within the basket expands to fill the aperture within the floor when a fire on the lower surface of the floor heats the connector. The conduction of heat from the fire through the connection is reduced because the insulating basket provides no metal conductive path from the electrical conduit and the spring clip to the upper surface of the basket.

Abstract: An access hatch for flush floor fitting assembly which is mounted by pivots comprising open ended slots and pins slidingly disposed in the slots. The pivots providing for the hatch to move between a closed position and any of a plurality of open positions and for the hatch, in any open position, to be lifted away from the assembly.

Abstract: A junction box that facilitates the connection of a conductor to a component located within the box. The box comprises a rear panel, side panels extending around the periphery of the rear panel and a front closure panel spaced from the rear panel. A pair of apertures are located in opposite ones of the side panels to allow passage of the conductor through the box. The side panels are formed in two sections with the sections meeting on the center line of the aperture. One section is attached to the rear panel and the other section is attached to a further side panel that extends between the opposite ones of the side panels. The further side panel is releasably connected to the rear panel by a releasable fastening positioned to be accessible upon removal of the closure panel.

Abstract: An electrical service fitting apparatus includes a base frame having a frame opening defined therethrough. An extensible service fitting is disposed through the frame opening and movable relative to the base frame between a retracted position and an extended position. The base frame has a plurality of grooves defined therein which open into the frame opening. The service fitting has a plurality of elongated ribs defined thereon which are received in the grooves so that the ribs may slide in the grooves to guide the service fitting as it moves between its retracted and extended position. A pair of coiled tape springs are connected between the base frame and the service fitting to bias the service fitting toward its extended position. Two sliding latches are provided to lock the service fitting in its retracted position. A top plate of the service fitting has access openings defined therein through which attachment devices can be accessed so as to mount the apparatus on a duct placed in a concrete floor.

Abstract: A junction splice and an adaptor for electrically connecting the flat conductors of under carpet cable with the round power conductors from an underfloor raceway or a pokethru.

Abstract: In an access floor construction, service outlets (7), such as electrical sockets, are connected to a service supply accommodated in the underfloor space (5) by leads (9) extending through openings (8) in the edges of some of the removable panels which form the access floor. The removable panels with such openings can be interchanged with other panels and oriented so as to locate an opening (8) in a position close to a service outlet so as to permit the lead from the outlet to pass conveniently into the underfloor space (5) for connection to the service supply.

Abstract: A door which is magnetically shielded and RF-shielded is disclosed for use with magnetically and RF-shielded room enclosures in which the door is slidably disposed within the space between the outer and inner enclosure of a shielded room, the door being actuated by pneumatic cylinders situated within the door which pressurize the door so that the door makes contact, and a tight seal, with the inner and outer enclosure walls.

Abstract: An electrical cable connector seals an armoured electrical cable entering an explosion proof enclosure. The connector has less parts than existing connectors and takes less time to seal and assemble. The connector includes a rigid substantially tubular body portion with external threads at each end, the body portion has a passage therethrough for insulated conductors of an armoured electrical cable, an internal curved shoulder at one end of the body portion, and an internal taper at the other end of the body portion. A substantially tubular seal made from firm resilient elastomeric material passes over the armoured electrical cable, the seal has a substantially cylindrical inner surface, a frusto-conical outer surface extends from a small end, having a curved lip at the small end where the outer surface and the inner surface join, the curved lip is adapted to match the internal curved shoulder of the body portion.

Abstract: A cable clamp for use in an electrical box or the like for locating, holding and grounding cables fed into the box and through the clamp. The cable clamp is mounted within the electrical box adjacent the knock-out openings using a single fastener to retain one or two sheathed cables. The cables are clamped between walls of the clamp which includes an end abutment wall having a pair of apertures through which the conductor wires are fed. The abutment wall positionally locates the sheath of the cable. The clamping walls are brought together to retain the cable as the single fastener is tightened. The clamping walls include inner ribs which receive maximum clamping force via a stiffener flange and a small bearing surface to securely engage and position the cable. The cable clamp is integrally formed from a single piece of material, preferably steel.

Abstract: A shielding door for an electromagnetically shielded room. The door has a door panel which is hingedly mounted. Attached to the door panel is a sheet-metal shroud which is movable between a closed-door position remote from the panel and an open-door position near the panel.

Abstract: This invention relates to an adjustable outlet box assembly and method of application including an outlet box assembly with a box cover assembly mounted thereon and having a laterally extended receptacle box member to which is attached a variable depth ring assembly. The variable depth ring assembly includes a variable ring member having a keeper plate assembly mounted thereon to enclose adjustment bolt members which are engagable with the receptacle box member and operable to be rotated to provide adjusted movement of the variable ring member relative to the receptacle box member. An adjustable outlet box assembly is provided having a stud anchor plate assembly connectable to a support member and having a variable depth ring assembly connected thereto. A further embodiment utilizes the variable ring member having a groove portion about an outer periphery to receive a fire resistant caulking material therein.

Abstract: A window for electromagnetic interference shielded enclosures has a shielding screen system with two grids having dimensionally different mesh patterns to overcome optical interference and distraction resulting from the moire effect. The screens are supported in spaced, angularly offset positions on a continuous frame providing electrical continuity between the shielding system and the shielding layer of a surrounding wall.

Abstract: An electrical duct system is provided having a flush floor fitting associated with a multi-cell duct placed in the floor. A top wall of the duct has a central access opening and two outer access openings communicated with a central cell and two outer cells of the duct. An access housing is located in top of the duct. A trim ring on top of the access housing has first, second and third mounting spaces for mounting outlet devices therein. A divider is located in the housing and divides the interior of the housing into first, second and third chambers associated with the first, second and third mounting spaces of the trim ring. The first and third chambers overlie and are communicated with the central access opening of the duct. The second chamber extends between the first and third chambers and is communicated with both of the outer access openings of the duct and is isolated from the central access opening. The divider is telescopingly extendable to accommodate different heights of access housings.

Abstract: A printed circuit board having electrical components connected thereto in spaced relation is coated with a resin material by immersion in a container of resin material. The flow of resin between the electrical devices and the circuit board is facilitated by the provision of holes through the circuit board in alignment with each electrical component so that the formation of blow-holes is prevented.

Abstract: A box to be mounted in an opening in an access or raised floor. The top of the box has flanges which engage the floor and support the box in the floor opening. The width of the box is the same as the width of the opening in the floor. The length of the box is greater than the length of the opening. The box has a curved front so that it can be swung down into the opening and when in position part of the box is under the floor. The part of the box under the floor is provided with barriers which form high and low tension channels. The box has a cover providing access to the inside of the box. The inside of the box has a plurality of plates which support high tension receptacles and low tension jacks. Also, in one embodiment, the box has a pass-thru channel for passing and/or splicing cable.

Abstract: A personal computer CPU chassis (10) is sealed from the emission of radio frequency (RF) through the expansion slots (24) in the rear panel (18). An expansion slot seal (37) is dimensioned to fit over the edges or strips (32-34) of the slots (24) and is held in place by a slot cover (26). The seal (37) has a flat portion (46) for direct contact with the strips (32-34) and an angled portion (48) for direct contact with the cover (26). The cover (26) is held in place by a screw (54) and a retaining device (60) which forces the cover (26) into the seal (37). Thus a metal-to-metal seal is formed around the expansion slots (24) to inhibit the emission of RF therefrom.

Abstract: An electrical connection housing assembly for insertion in an interior passage for floor-to-floor electrical transmission of both power and communication includes a first housing comprised of first matter, a second housing comprised of second matter of lesser heat conductivity than the first matter, the second housing having a first portion assembled with the first housing and a second portion extending from the first housing and a divider arrangement for separating respective power and communication cables to be inserted in the assembly from one another. The divider arrangement includes a first divider, comprised of a resilient strip of intumescent material, fixedly supported in the assembly and a second divider removably supported in the assembly and in registry with the first divider for jointly defining respective power and communication channels through the assembly.

Abstract: This cover fits over and removably adheres to a wall-mounted electrical box or to an electrical component fixed to the box. The protecting cover is used, instead of masking tape, to protect the electrical elements from being soiled with paint during spray-gun painting.