Abstract: An equipment enclosure free air cooling assembly includes an air outlet arranged to deliver air to inside an equipment enclosure and an air inlet arranged to receive air from outside the equipment enclosure. An air flow pathway is provided through which air entering the air inlet must pass to reach the air outlet. An adjustable screen assembly has a screen filter element. An adjustment mechanism is operable to selectively utilize different regions of the screen filter element for filtering air passing through the air flow pathway at different times.

Abstract: An equipment enclosure with temperature control components, an equipment enclosure temperature control unit, an equipment enclosure temperature control method, and various modular temperature control subassemblies are respectively disclosed for controlling the temperature of equipment in an equipment chamber. The temperature control components and unit may be implemented with a modular design wherein an air-conditioning unit is selectively mountable on an air handler assembly. The temperature control components and unit may support air-conditioning, free-air-cooling, free-air-cooling-with-return, and heating modes of operation. An emergency-free-air-cooling mode of operation may also be supported.

Abstract: An equipment enclosure includes an air exhaust opening and an air intake opening at respective upper and lower regions of the enclosure, and an interior equipment chamber configured to house controlled temperature equipment at a controlled temperature equipment area. A temperature diverter system includes a warm air exhaust subsystem and a warm air circulation subsystem. The warm air exhaust subsystem is operable to vent warm air in the enclosure through the air exhaust opening in order to cool the controlled temperature equipment area. The warm air circulation subsystem is operable to circulate warm air in the enclosure to the controlled temperature equipment area in order to warm that area. The equipment enclosure further includes one or more temperature sensors and a temperature controller for controlling operations of the warm air exhaust subsystem and the warm air circulation system based on input from the temperature sensor(s).

Abstract: An electrical panelboard enclosure includes an enclosure housing with an interior equipment chamber accessible by way of a service entrance door. A service panel is configured to receive power from a main power source. A main power breaker has a main power breaker toggle switch and is positionable between a power-on state and a power-off state to selectively activate and deactivate the main power. A power cutoff switch mechanism is operable from outside the service entrance door and is positionable between a power-on state and a power-off state to mechanically engage and deactivate the main power breaker toggle switch and cutoff the main power without opening the service entrance door. A lockout system is operable to prevent the service entrance door from being secured in a closed position unless the main power breaker and the power cutoff switch mechanism are in the same state.

Abstract: A cover assembly for use with an outdoor equipment enclosure when the enclosure is opened up for access. The equipment enclosure includes a housing having an interior equipment chamber accessible via an opening in a side portion of the housing. A service entrance door is positionable between a closed position wherein the opening is covered and an open position wherein the opening is exposed. The cover assembly includes a frame positionable above a top portion of the housing. The frame is configurable between an open unfolded position and closed folded position. A cover is supportable on the frame in the unfolded position. The cover has a top and plural side portions that enclose the enclosure housing when the cover is deployed. This provides an area surrounding the enclosure housing that is sequestered from an outside environment when it is necessary to access the equipment chamber via the service entrance door.

Abstract: An electrical panelboard enclosure includes a primary service panel configured to receive power from a main power source and an alternate power source, an alternate power source connector array, and a distribution panel that delivers main or alternate power to subsidiary load circuits. A service transfer switch unit includes a main power breaker and an alternate power breaker having mutually interlocked toggle switches for respectively activating/deactivating the main and alternate power. The panelboard enclosure further includes a power cutoff switch operable from outside a service entrance door of the enclosure to mechanically engage and deactivate the main power breaker toggle switch.

Abstract: An electrical panelboard enclosure includes an enclosure housing with an interior equipment chamber accessible by way of a service entrance door. A service panel is adapted for connection to a main power source in order to receive main power therefrom. A power supply is operatively connected to receive main power from the service panel and deliver it to a load. The power supply is also adapted for connection to a backup power source in order to receive backup power therefrom and deliver it to the load in the event of a main power cutoff. A load disconnector is operatively connected between the power supply and the load. The load disconnector is manually operable to disconnect the load from the power supply to prevent the power supply from delivering either main or backup power to the load.

Abstract: A high-security enclosure includes a base, a cover and a lock system. The lock system includes a base portion and a cover portion. The lock system base portion includes one or more fixed lock bars. The lock system cover portion includes one or more movable lock bars. Each movable lock bar is generally perpendicular to, and arranged to engage, one of the fixed lock bars. The lock system cover portion further includes a lock bar retraction assembly coupled to the one or more movable lock bars for retracting the movable lock bar(s) substantially simultaneously out of engagement with the fixed lock bar(s). A security drive mechanism is coupled to the lock bar retraction assembly to drive the lock system.

Abstract: An equipment enclosure includes an air exhaust opening and an air intake opening at respective upper and lower regions of the enclosure, and an interior equipment chamber configured to house controlled temperature equipment at a controlled temperature equipment area. A temperature diverter system includes a warm air exhaust subsystem and a warm air circulation subsystem. The warm air exhaust subsystem is operable to vent warm air in the enclosure through the air exhaust opening in order to cool the controlled temperature equipment area. The warm air circulation subsystem is operable to circulate warm air in the enclosure to the controlled temperature equipment area in order to warm that area. The equipment enclosure further includes one or more temperature sensors and a temperature controller for controlling operations of the warm air exhaust subsystem and the warm air circulation system based on input from the temperature sensor(s).

Abstract: An electrical panelboard enclosure includes a primary service panel configured to receive power from a main power source and an alternate power source, an alternate power source connector array, and a distribution panel that delivers main or alternate power to subsidiary load circuits. A service transfer switch unit includes a main power breaker and an alternate power breaker having mutually interlocked toggle switches for respectively activating/deactivating the main and alternate power. The panelboard enclosure further includes an arrangement in which the primary service panel, the distribution panel, the alternate power source connector array and the service transfer switch are part of an installable panelboard assembly that is mountable as a unit within the panelboard enclosure.

Abstract: An electrical panelboard enclosure includes an enclosure housing with an interior equipment chamber accessible by way of a service entrance door. A service panel is adapted for connection to a main power source in order to receive main power therefrom. A power supply is operatively connected to receive main power from the service panel and deliver it to a load. The power supply is also adapted for connection to a backup power source in order to receive backup power therefrom and deliver it to the load in the event of a main power cutoff. A load disconnector is operatively connected between the power supply and the load. The load disconnector is manually operable to disconnect the load from the power supply to prevent the power supply from delivering either main or backup power to the load.

Abstract: An electrical panelboard enclosure includes an enclosure housing with an interior equipment chamber accessible by way of a service entrance door. A service panel is configured to receive power from a main power source. A main power breaker has a main power breaker toggle switch and is positionable between a power-on state and a power-off state to selectively activate and deactivate the main power. A power cutoff switch mechanism is operable from outside the service entrance door and is positionable between a power-on state and a power-off state to mechanically engage and deactivate the main power breaker toggle switch and cutoff the main power without opening the service entrance door. A lockout system is operable to prevent the service entrance door from being secured in a closed position unless the main power breaker and the power cutoff switch mechanism are in the same state.

Abstract: An electrical panelboard enclosure includes a primary service panel configured to receive power from a main power source and an alternate power source, an alternate power source connector array, and a distribution panel that delivers main or alternate power to subsidiary load circuits. A service transfer switch unit includes a main power breaker and an alternate power breaker having mutually interlocked toggle switches for respectively activating/deactivating the main and alternate power. The panelboard enclosure further includes an arrangement in which the primary service panel, the distribution panel, the alternate power source connector array and the service transfer switch are part of an installable panelboard assembly that is mountable as a unit within the panelboard enclosure.

Abstract: An electrical panelboard enclosure includes a primary service panel configured to receive power from a main power source and an alternate power source, an alternate power source connector array, and a distribution panel that delivers main or alternate power to subsidiary load circuits. A service transfer switch unit includes a main power breaker and an alternate power breaker having mutually interlocked toggle switches for respectively activating/deactivating the main and alternate power. The panelboard enclosure further includes a power cutoff switch operable from outside a service entrance door of the enclosure to mechanically engage and deactivate the main power breaker toggle switch.

Abstract: A high-security enclosure includes a base, a cover and a lock system. The lock system includes a base portion and a cover portion. The lock system base portion includes one or more fixed lock bars. The lock system cover portion includes one or more movable lock bars. Each movable lock bar is generally perpendicular to, and arranged to engage, one of the fixed lock bars. The lock system cover portion further includes a lock bar retraction assembly coupled to the one or more movable lock bars for retracting the movable lock bar(s) substantially simultaneously out of engagement with the fixed lock bar(s). A security drive mechanism is coupled to the lock bar retraction assembly to drive the lock system.

Abstract: A spark gap for protecting an electrical circuit from voltage surges includes a first electrical circuit trace element having a first end face of defined thickness and length, and a second electrical circuit trace element having a second end face of defined thickness and length. The first and second end faces are spaced from each other along their respective lengths to provide an air gap having a defined gap width. The gap width is of a size to provide a required spark gap breakover voltage under design conditions of temperature, humidity and air pressure. The air gap also has a defined gap length corresponding to the length of the first and second end faces. The gap length is of a size that maximizes spark gap life over repeated discharge cycles without introducing undesirable amounts of capacitance.

Abstract: A broadband telecommunication network (such as a cable television distribution system) includes a plurality of switching units (such as taps) controlling subscriber access to the network. The switching units are controlled from a central location (such as a head end) using minimal network transmission medium power. A repeating sequence of switching unit control messages is sent from the central location across the network. Each of the messages is addressed to an individual one of the switching units. Each switching unit is periodically powered up from a low power sleep state to a higher power operational wake state in synchronization with a corresponding one of the control messages being sent from the central location. After a switching unit's corresponding control message is processed, the switching unit is returned to the lower power sleep state.

Abstract: A lock structure for a container having a first part carrying a resilient latch and a second part carrying a latch retainer, the lock structure including a first housing mounted on the second part and having a chamber for containing the latch retainer, and a second housing mounted on the second part of the container and containing a key-operated latch-moving member for biasing the latch out of latching engagement with the latch retainer, the latch-moving member being of a configuration to be moved to a non-unlatching position by the resilient latch when the latch-moving member is not actuated to an unlatching position by a key.

Abstract: A fastener including a body, a shroud rotatably mounted on the body, and a resilient retaining ring located in opposed grooves between the shroud and the body, one end of the body extending outwardly beyond the shroud, and a frustoconical outer surface on the shroud which has its larger side proximate the end of the body which extends beyond the shroud.

Abstract: A filter cage for impeding access to a cable filter within an enclosure having an enclosure wall and a plurality of bosses extending outwardly therefrom and containing a cable filter and associated cables, the filter cage including a cage wall, a pair of side walls and a pair of end walls depending from the cage wall, cutouts in the end walls for receiving the cables, apertures in the cage wall for receiving screws for fastening the filter cage to the bosses, openings in the cage wall for permitting viewing of the filter within the cage, the end walls and side walls being spaced so as to abut the bosses on the enclosure wall to thereby locate the apertures in the cage wall in proper alignment with the bosses for receiving screws which pass through the apertures and into the bosses.