Abstract: An enclosure having a rear base defining a cavity for holding one or more electronic devices. The enclosure includes a front cover coupled to the rear base and movable between an open position and a closed position. The enclosure includes a chassis mounted within the cavity of the rear base and a drawer chest having a multiple drawers within the cavity of the rear base. The drawer chest is connected to the chassis, and the multiple drawers are configured to receive the one or more electronic devices. The enclosure includes one or more connectors that are exposed outward and provide a connection to a host electronic device.

Abstract: An EMP/HEMP protection device for protecting equipment from electromagnetic pulses. The protection device includes a housing defining a cavity therein and separated into two chambers, a dirty chamber for propagation of signals before filtering of electromagnetic interference, and a clean chamber, isolated from the dirty chamber, for propagation of signals after filtering. A rigid-flex printed circuit board (PCB) is disposed in the cavity for facilitating electrical connections between the chambers. Surface mount electrical components for EMP/HEMP protection are coupled with the rigid-flex PCB. Power and/or data signals are transferred from the dirty chamber to the clean chamber though a wave guide below cutoff (WBC). The WBC is formed from opposing electrical ground planes within a center PCB of the rigid-flex PCB. An electrically conductive and weather sealing gasket is disposed in the cavity of the housing for further EMI isolation.

Abstract: A surge protector for use with a two line signal path or control circuit. The surge protector has two terminals for connecting to both line signals as well as provisions for earth grounding. The surge protector has a surge protection stage and a short detection stage for detecting imbalances in the signal. The surge protector also includes a trigger stage which activates an electromechanical device to disconnect the two terminals from the rest of the surge protector when the short detection stage detects a short. The surge protector further includes visual indicators for indicating an operating status and a short detection.

Abstract: A low let-through voltage surge suppression or protection circuit for protecting hardware or equipment from electrical surges. During operation when no surge condition is present, the circuit allows propagation of signals from a source to a load along a signal path. When a surge is present, the circuit senses and diverts the surge away from the signal path, utilizing common mode and/or differential mode surge protection. An electronic filter is connected in parallel with surge suppression circuit elements for reducing the let through voltage that would otherwise propagate and require a higher power surge suppression circuit element to mitigate. Cascading multiple electronic filters in parallel with surge suppression circuit elements further reduces voltage let through.

Abstract: A DC surge protection circuit for protecting hardware from surges. During operation when no surge condition is present, the circuit passes signals from an input to an output through an inductance. When a surge is present, the circuit conducts a portion of the surge through at least one diode and diverts the surge to a ground node. A gas tube begins to conduct a portion of the surge above a first voltage level after the at least one diode first begins to conduct. A first MOV begins to conduct a portion of the surge above a second voltage level after the gas tube begins to conduct. The circuit may include a status portion. The circuit may be within an enclosure for plug-in to a motherboard or within an enclosure of an in-line connector for connection with a cable. The circuit may be configured to attach directly to a frame.

Abstract: A DC block RF device includes a housing defining a cavity having a central axis, an input conductor disposed in the cavity of the housing and extending substantially along the central axis of the cavity and an output conductor disposed in the cavity of the housing and extending substantially along the central axis of the cavity. The DC block RF device further includes a first capacitor connected to the input conductor and a second capacitor connected to the output conductor and the first capacitor. In addition, the DC block RF device includes a coil for grounding surge signals, the coil having an inner edge connected to the center conductor and an outer edge connected to the housing of the device. During a surge, the first capacitor is configured to arc the surge across the capacitor without damaging the capacitor so the surge can dissipate through coil to ground.

Abstract: An earthquake triggered and electronically controlled shutoff valve for allowing or preventing a flow of a fluid. The shutoff valve incorporates a weight positioned on a pedestal and disengaged from a surrounding moveable tube. Upon sufficient vibrational force, the weight moves from its resting position on the pedestal and engages with the moveable tube to block the flow of the fluid through the shutoff valve. In addition to vibrational forces, the shutoff valve may be electronically triggered via a connector electrically connected to one or more solenoids positioned within the shutoff valve. The solenoids may engage with the weight upon electrical stimulation or may engage with a moveable member coupled to the moveable tube. An energy storage unit provides power for the solenoids such that the solenoids may function in the absence of external power to the shutoff valve.

Abstract: A surge suppressor device includes a first housing defining a first cavity, input and output conductors disposed in the first cavity of the first housing, a capacitor connected in series with the input conductor and the output conductor, a first spiral inductor having an inner edge connected to the input conductor and an outer edge and a second spiral inductor having an inner edge connected to the output conductor and an outer edge. The surge suppressor device further includes a second housing defining a second cavity and connected to the first housing, a feed-through connecting the first cavity to the second cavity, a non-linear protection device positioned in the second cavity of the second housing and a first electrical wire passing through the feed-through and connecting the outer edge of the first spiral inductor to the non-linear protection device.

Abstract: A surge protection apparatus or method for opening a surge path upon failure of a surge protection element as a short. The surge protection device may include a switch controlled by a solenoid or other switch controlling component that changes a position of the switch if the surge protection element fails as a conductive element. A first position of the switch is configured to allow transmittal of a signal from a signal connection, through the surge protection element, and to a ground connection. A second position of the switch is configured to prevent transmittal of a signal from the signal connection, through the surge protection element, and to the ground connection. A delay may be added between the changing of the switch position after the surge protection element fails as a conductor. Visual or other notifiers may indicate when the switch is in the second position.

Abstract: A surge protector for use with a two line signal path or control circuit. The surge protector has two terminals for connecting to both line signals as well as provisions for earth grounding. The surge protector has a surge protection stage and a short detection stage for detecting imbalances in the signal. The surge protector also includes a trigger stage which activates an electromechanical device to disconnect the two terminals from the rest of the surge protector when the short detection stage detects a short. The surge protector further includes visual indicators for indicating an operating status and a short detection.

Abstract: The present invention may provide a surge current sensor and a surge protection system that deploys one or more surge current sensors. The surge current sensor may be placed on or near to a conduit, and it may be used for sensing the surge current conducted therein. The surge current sensor may include a current transformer and a processor. The current transformer may be used for receiving a magnetic flux generated by the surge current and transforming the received magnetic flux to a voltage. The processor may be coupled with the current transformer, such that it may be configured to generate a digital signal based on the voltage. Once the digital signal indicates that the magnitude of the surge current has exceeded a predefined threshold, the surge protection system may initiate a surge protection mechanism.

Abstract: A surge protection circuit to reduce capacitance inherent of standard diode packaging and to improve voltage clamping reaction speeds under high surge conditions. The surge protection circuit has a coil having a first end and a second end and a diode cell having a top layer, a center diode junction, and a bottom layer. The top layer is directly connected to the second end of the coil and the bottom layer is directly connected to a ground. The diode cell has no wire leads.

Abstract: An EMP/HEMP protection device for protecting equipment from electromagnetic pulses. The protection device includes a housing defining a cavity therein and separated into two chambers, a dirty chamber for propagation of signals before filtering of electromagnetic interference, and a clean chamber, isolated from the dirty chamber, for propagation of signals after filtering. A rigid-flex printed circuit board (PCB) is disposed in the cavity for facilitating electrical connections between the chambers. Surface mount electrical components for EMP/HEMP protection are coupled with the rigid-flex PCB. Power and/or data signals are transferred from the dirty chamber to the clean chamber though a wave guide below cutoff (WBC). The WBC is formed from opposing electrical ground planes within a center PCB of the rigid-flex PCB. An electrically conductive and weather sealing gasket is disposed in the cavity of the housing for further EMI isolation.

Abstract: A surge suppression device may include a housing having a cavity, a center conductor positioned within the cavity, a spiral inductor having an inner curve coupled to the center conductor and an outer curve, a coil capture device connected to the outer curve of the spiral inductor, and a ring assembly having a first ring connected to the coil capture device, a second ring connected to the housing, and a voltage limiting device positioned between the first ring and the second ring.

Abstract: A DC surge protection circuit for protecting hardware from surges. During operation when no surge condition is present, the circuit passes signals from an input to an output through an inductance. When a surge is present, the circuit conducts a portion of the surge through at least one diode and diverts the surge to a ground node. A gas tube begins to conduct a portion of the surge above a first voltage level after the at least one diode first begins to conduct. A first MOV begins to conduct a portion of the surge above a second voltage level after the gas tube begins to conduct. The circuit may include a status portion. The circuit may be within an enclosure for plug-in to a motherboard or within an enclosure of an in-line connector for connection with a cable. The circuit may be configured to attach directly to a frame.

Abstract: An apparatus for protecting hardware devices is disclosed. A DC pass RF surge suppressor includes a housing defining a chamber having a central axis, the housing having an opening to the chamber, an input conductor disposed in the chamber of the housing and extending substantially along the central axis of the chamber, an output conductor disposed in the chamber of the housing and extending substantially along the central axis of the chamber, a non-linear protection device positioned in the opening of the housing for diverting surge energy to a ground, a capacitor connected in series with the input conductor and the output conductor, a first spiral inductor having an inner edge connected to the input conductor and an outer edge coupled to the non-linear protection device, and a second spiral inductor having an inner edge connected to the output conductor and an outer edge coupled to the non-linear protection device.

Abstract: A high power band pass RF filtering device having a housing defining an interior chamber and having one or more walls for substantially dividing the interior chamber into one or more sections. A circuit with filtering components for achieving strong attenuation of out-of-band signals is disposed within the interior chamber, certain components of the circuit being separated from one another by the walls. Ports on the housing electrically connect to a respective input node and output node of the circuit and also connect to surge protection elements for dissipating surge conditions present at the ports. A non-surge signal can travel between the ports and through the filtering components. An oil or other fluid is disposed and completely contained within the housing and contacts the circuit components for cooling the circuit components.

Abstract: A high power band pass RF filtering device having a housing for containing a printed circuit board with filtering components for achieving strong attenuation of out-of-band signals. An input port and an output port on the housing electrically connect to a respective input node and output node on the printed circuit board. Surge protection elements are connected at the input port and at the output port for dissipating surge conditions present at the input port or the output port to the housing before the surge travels through the printed circuit board. A non-surge signal present on the input port can travel through the filtering components on the printed circuit board towards the output port. An oil or other fluid is disposed and completely contained within the housing and contacts the printed circuit board for cooling the printed circuit board or the filtering components.