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6201680 |
Adjustable high-speed audio transducer protection circuit
An audio loudspeaker protection circuit used to protect single or multiple array connected audio transducers, and passive audio crossover networks from damage. An audio loudspeaker protection...
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6196862 |
Transmission line connectors and assemblies thereof
A transmission wire connector, and a kit of parts for assembling such a transmission wire connector, is provided. The transmission wire connector, and a kit of parts, includes a first wire contact...
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6198615 |
Voltage unit bus clip
A telecommunications protection unit includes a voltage unit having an electrically insulating base configured to house a diode module assembly and a voltage limiting cell therein. The voltage...
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6195242 |
Method and system to deter theft of cable television service
A method and system to deter cable television (CATV) service theft is disclosed. The method includes identifying a critical area along the service line of the service installation susceptible to...
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6188560 |
Multi-wire terminal block employing removable surge protector
A protected terminal block has a housing (10) having a plurality of test ports (18) and a plurality of electrical contact elements (40), each of which includes a test lead (48) which is accessible...
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6185083 |
Protected telecommunication test adapter module
A protected telecommunications test adapter for use in troubleshooting telephone networks. The test adapter plugs into an industry standard panel and provides access to the network wiring via an...
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6181542 |
Method of making a stack-polysilicon capacitor-coupled dual power supply input/output protection circuit
An interface buffer circuit connected at an interface of circuits having a high voltage power supply and circuits having a low voltage power supply, prevents damage due to application of the high...
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6178080 |
Resettable fast current limiter in telecommunications protection
A device and method for providing overvoltage and overcurrent protection to equipment and personnel that come in contact with electrical lines, particularly telecommunications lines. The...
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6175483 |
Multi-tap distribution apparatus
A multi-tap distribution apparatus is encased in an enclosure comprising a boxed shaped housing (2) with one side open and a main body (1) fitted in the opening of the housing. A pair of operating...
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6172864 |
Protection against overvoltages of an interface of telephone lines
The present invention relates to a system for protecting against overloads in a telephone system. The telephone system includes a telephone exchange, a ringing device and an interface, coupled to...
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6172865 |
Module for protecting telecommunication devices against voltage surges
A module is provided which includes two gas-filled surge arresters arranged next to one another in a housing. An auxiliary discharge gap and a short-circuit device is associated with each surge...
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6167321 |
Interface module with protection circuit and method of protecting an interface
An interface module for a communications system includes a processing device and a peripheral device which are interconnected through a communications bus. The interface module includes a...
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6166895 |
Patch cable and method for installing telecommunications equipment in remote terminals
A patch cord and method for installing new hardware in a remote terminal of a telecommunications system. Hardware installed inside remote terminal cabinets require lightning protection systems to...
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6166894 |
PCB based protector cartridge
A protector cartridge circuit arrangement which permits more robust line protection. The circuit arrangement has high-capacity and large-sized components staggered across the surface of a printed...
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6163447 |
Telephone equipment protection circuit
A circuit for protecting telephone/modem equipment from damage, includes a source of a subscriber telephone signal. An energy transfer device is coupled to the subscriber telephone signal source...
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6160887 |
Telephone loop-current regulator
A loop-current regulator for protecting terminal telephone equipment coupled to telephone lines from high telephone line loop-current. The loop-current regulator has a current regulator for...
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6144543 |
Grounding device
A grounding device for interfacing telecommunications equipment connected through tip and ring conductors and an electronic module with a grounding path for discharging current surges and voltage...
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6144737 |
Trunk interface circuit having function of battery feed to central office
A telephone-system interface circuit connected to a central office via a tip line and a ring line includes a battery having a first terminal and a second terminal. A first current control circuit...
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6137352 |
Circuit arrangement for protection of HF-input-circuit on telecommunications devices
The fine protection circuit arrangement is to reduce the remaining residual impulses on gas tube charge eliminators. This is to be achieved by means of a cascading of a gas tube charge eliminator...
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6134093 |
Category 5/25-pair protector
A Category 5/25-pair circuit protection assembly for protecting telecommunication related equipment and the like from power and transient surges includes a two-piece interfitting housing which...
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6128171 |
Gate-coupled structure for enhanced ESD input/output pad protection in CMOS ICs
An electrostatic discharge protection circuit comprising a static discharge input node, a first NMOS FET having its drain connected to the input node and its source and substrate connected to Vss,...
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6122156 |
Surge suppression system
A surge suppression system for use in a telephone and data communications terminal block. The surge suppression system includes a modular housing having surge suppression circuitry disposed...
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6118643 |
Modular surge suppression system and method
A surge suppression module is provided for connection to a wall receptacle and interconnection with other modules. Each module includes a top portion rotatably connected to a bottom portion. A male...
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6111738 |
Intrinsically safe circuits
An intrinsically safe circuit for use in a hazardous environment includes a plurality of circuit sectors (1, 2) which are substantially isolated physically from one another by an electrical...
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6108180 |
Multi-grounded neutral electrical isolation between utility secondary low-voltage power service and high-voltage transmission structures
A multi-grounded neutral electrical isolation system for a personal-communication-system cell site consists of two standard distribution transformers separated by a distance greater than the zone...
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6108186 |
Game machine having communication terminals
It is an object to provide a game machine having communication terminals wherein an integrated circuit portion is reliably protected from static electricity or a surge voltage input through the...
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6104582 |
Storm alert automatic system power-down
Apparatus and processes to automatically power-down a computer system upon determination of the presence, imminence, or forecast of severe weather in the local area. A computer system receives data...
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6104591 |
Telephone line protection element
A telephone line protection element constructed of three lead frames having contact fingers for holding therebetween a semiconductor cell providing overvoltage protection between the telephone line...
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6101076 |
Electromagnetic safety enhancement circuit for universal serial bus systems
An electromagnetic safety (EMS) enhancement circuit is provided for a USB (Universal Serial Bus) system, which can simulate an unplugging and replugging action so as to ensure continuous operation...
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6101080 |
EMP-charge eliminator
The invention concerns an de-coupled EMP-charge eliminator device in a co-axial cable, with charge eliminator component (28) in electric contact with conductor (24) leading to the internal...
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6101079 |
Current and transient voltage protector
A current and transient voltage protector. The protector module for a wiring block having at least one wiring strip includes an insulative housing having opposed ends, at least four electrically...
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6084762 |
Connector for a protector block in a telecommunications system
A telecommunications network (10) includes a main distribution frame (12) that receives telecommunications traffic carried over individual tip and ring signal line pairs (20) from trunks (18). The...
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6072683 |
Miniaturized category 5 protection circuit
A miniaturized Category 5 protection device for protecting telecommunication related equipment and the like from power and transient surges includes a plurality of sets of line-pair wires. Voltage...
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6061445 |
Surge protection data access arrangement (DAA)
An improved surge protection circuit for withstanding surges is provided. A first node is provided for coupling to a tip lead, and second node is provided for coupling to a ring lead. The surge...
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6057873 |
Electrical isolation of CATV devices
A method of isolating an appliance coupled to receive radio frequency (RF) broadcast signals from an electrical hazard includes the step of coupling a first and second conductor for providing the...
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6058002 |
Common mode signal attenuator
A common mode signal attenuator includes a magnetic core, and a communications cable having at least one conductor adapted to transmit a communications signal. The communications cable is...
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6040972 |
Protection device for communication
A protection device for a communication system is inserted between a circuit side and a subscriber side and includes a protection circuit part and trimmable resistors. The protection circuit part...
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6034611 |
Electrical isolation device
An electrical isolation device for use in an electrical distribution network having a plurality of branch circuits each defined by line and neutral conductors connected between a power source and a...
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6034862 |
Diode module assembly with bifurcated terminals
A telecommunications protection unit includes a voltage unit having an electrically insulating base configured to house a diode module assembly and a voltage limiting cell therein. The voltage...
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6031704 |
Electrostatic protection circuit in a semiconductor device
A power line and a ground line of a bipolar transistor for the electrostatic protection are isolated from a power line and a ground line of an active transistor for data input and output. Also, a...
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6031705 |
Surge protection circuit, in particular for inputs of integrated circuits
A surge protection circuit that can be used, in particular, for monitoring and protecting a diagnostic interface, such as, for example, the SAE J 1708 diagnostic interface. A shared surge detection...
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6018452 |
Residential protection service center
Residential protection service center apparatus comprising AC power line overvoltage protection, telephone voice line overvoltage and overcurrent protection, high speed data line overvoltage and...
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6005756 |
Effective grounding of a circuit at RF and IF
A circuit for grounding a signal at a first frequency and at a second frequency. The circuit includes a first capacitor and an inductor in series and a second capacitor in parallel with the first...
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5998813 |
Component for protecting telephone line interfaces
A monolithic component for protection against over-currents liable to occur on a line in series with which is connected a detection resistor, comprises a first cathode-gate thyristor associated...
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5999394 |
Terminal block for a protective relay
A modular terminal block for connection between an electrical distribution system and the processing circuitry of a protective relay. The terminal block includes multiple separable tiers, each...
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5999393 |
Surge protector and lead assembly with improved contact area between the protector and lead
The present invention provides a lead for attachment to a cylindrical protector element with a circular contact ring thereon and a circular groove adjacent and axially inward of the contact ring....
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5991136 |
Protector unit
A protector unit for use in retrofitting connector blocks, such as a 300-type connector block or a C-50 frame includes a housing; a back-up, fail-safe assembly for providing a connection to ground;...
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5991139 |
Protection circuit and a node for a communications system using the protection circuit
A protection circuit prevents a surge applied to one end of a signal line from being applied to a circuit connected to another end of the signal line. The protection circuit includes a first diode...
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5991138 |
Method and apparatus for protecting aircraft electronics from lightning
A lightning protection element is incorporated into the portion of an aircraft signal distribution system which connects an antenna to flight critical equipment. The lightning protection element...
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5991140 |
Technique for effectively re-arranging circuitry to realize a communications service
In a communications arrangement, a copper wire pair arrangement traditionally used to provide a plain old telephone service (POTS) is also used to provide an asymmetric digital subscriber line...
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