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5557065 |
Overvoltage protectors sealed with gel
Telecommunications overvoltage protectors are sealed from environmental degradation by a gel. The gel is inserted in such a way as not to interfere with moving parts or air gaps in the protectors.
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5555153 |
Voltage and/or current protector and grounding bar arrangement for AT&T style 110 block
A voltage protector and grounding bar arrangement is provided for use with a telephone terminal block having at least two rows of terminals which are spaced apart from each other so as to define an...
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5548641 |
Protected telephone network termination module
This invention discloses a network termination module comprising a base structure having a means for grounding. Mounted on the base structure is an intermediate structure which contains a telephone...
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5546267 |
Communication circuit protector
A communication circuit protector is provided for use with connector blocks in telecommunication equipment. The circuit protector includes a uniquely-designed two-piece interfitting housing for...
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5543669 |
Remote feed circuit in communication systems
In communication systems, a dc voltage source can be connected via a first and a second winding of an input transformer and a subscriber line to every communication terminal equipment device by...
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5543999 |
Surge protector for computer equipment
An over voltage protector for electronics equipment, such as a computer terminal, which includes first and second electrical connectors and at least one line intersecting these connectors. The...
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5541804 |
PTC protector for AT&T style 110 block
A current-limiting protector package for use in conjunction with telephone terminal blocks comprises a two-piece interfitting housing which is made up of two housing halves soncially welded...
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5539801 |
Removable telephone line protection module for an electronic device
The present invention provides a removable telephone line surge protection circuit (104) for use by an electronic deuce such as a modem (102). The line protection circuit (104) protects the modem...
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5539820 |
Protection of active telephone line interface circuits
A telephone line interface circuit with d.c. amplifiers coupled to tip and ring paths is protected against transient voltages by a crowbar-type protection device coupled via a diode bridge to the...
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5537287 |
Protective circuit for a subscriber line circuit and a subscriber line circuit having such a protective circuit
Protective circuit with a threshold circuit for discharging overvoltage surges to ground and with a low-value resistor positioned in a line wire at the subscriber's end meets a higher level of...
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5537471 |
Weatherproof telephone station protectors
A weatherproof telephone station protector module suitable for use exposed to the weather including a hollow housing with first and second sealed test terminals and a plurality of through apertures...
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5526218 |
Surge absorbing device to protect from overvoltage and overcurrent
A surge absorbing device with protection function to protect a circuit from overvoltage and overcurrent, comprising a gap or microgap surge absorbing element and a lower melting point metal wire...
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5526217 |
Voltage protection for modem add in cards with sideswipe contacts
A modem located on a PC card. An I/O socket is mounted on one end of the PC card and sideswipe contacts are positioned long e one or more sides. The I/O socket has a plurality of positions...
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5523916 |
Surge arrester with thermal overload protection
A surge arrester assembly includes an electrically conductive container having disposed therein a surge arrester and a meltable element. The surge arrester has a first electrode in electrical...
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5515436 |
Module for rapid interconnection of two monopair telephone lines
This invention relates to a module for rapid interconnection of two monopair telephone lines by metal contacts with self-stripping slots. It comprises a base element which is fixed on the receiving...
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5508873 |
Primary surge protector for broadband coaxial system
A surge protector is adapted for a broadband coaxial system in which electrical signals having a frequency range from DC to one gigahertz are transmitted. The surge protector has a pair of coaxial...
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5504654 |
Cross connect system for telecommunications systems
A cross connect system for telecommunication wires reduces the required time to install and effect cross connections if the wire connections are made by hand and changes are made between circuits...
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5493469 |
Surge protection for data lines
Surge protection for a data transmission line, typically a telephone line including two data signal conductors, incorporates a primary protector circuit for high voltage, high energy surges and a...
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5490215 |
Telecommunications T1 carrier overvoltage and fiber to curb power protector
A fiber to curb and telecommunications T1 carrier overvoltage protection apparatus includes a pair of semiconductor junction breakdown crowbar devices connected in series between TIP and RING...
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5490032 |
Miniature station protector modules with an internal protector housing
A miniature station protector module for communication systems includes a hollow housing having a top surface and open bottom. A pair of line terminals and ground terminals are disposed in the...
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5488535 |
Arc suppressor for sidactors
An arc suppressor for a sidactor type protective device wherein the sidactor type protective device comprises a sidactor body portion, two end line terminals, a central ground terminal, and a...
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5483409 |
25-pair circuit protection assembly
A circuit protection assembly for protecting telephone communication related equipment includes a two-piece interfitting housing, a printed circuit board sub-assembly, an exposed side connector...
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5481242 |
Debris-reducing telephone resistor combination and method
A telephone resistor combination and method, that is formed by a ceramic substrate having a resistive film on it, and pins on one edge of the substrate and connected to the film. A U-shaped cold...
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5475356 |
Gas-tube arrester
A gas-tube arrester includes an arrester body in which an inert gas is contained, and first and second electrodes face each other separated by an insulator. An insulating, heat-resistant film is in...
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5465068 |
Excitation stage of a transmission tube for short-wave transmitter
An excitation stage having a predetermined number of semiconductor-based amplification modules parallel-connected at the input of a coupling device to couple the outputs of the amplification...
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5459783 |
Acoustic feedback suppression device particulary for auxiliary ringers in plug-in telephone systems
An acoustic feedback suppression device, particularly for auxiliary ringers in plug-in telephone systems, includes diodes in addition to a rectifier bridge of the ringer. The circuit provides...
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5457593 |
Apparatus for connecting multi-wire telecommunication cabling to surge protector modules
A protector block assembly for coupling a plurality of surge protectors to multi-line telecommunications cables includes a multi-layer printed circuit, to which has been mounted at least two cable...
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5450269 |
Grounding arrangement for a protector in telecommunications
A grounding arrangement for a protector includes an arrester device having two conducting points for connecting to inlet prongs and a grounding point having a protruding rod for connecting to a...
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5438619 |
Solid state primary telephone protector
A telephone protector includes a rigid plastic packaged solid state switch which is clamped to prevent the switch from bursting to an open circuit condition.
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5426556 |
Extra protection module of an exchange
A protection module connected between a main distributing frame and an exchange, for protecting a subscriber circuit from an overvoltage or an overcurrent, comprises an overcurrent protecting...
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5425099 |
Positive temperature coefficient thermistor device
A positive temperature coefficient thermistor element comprising a plate-shaped ceramic body made of a ceramic material whose Curie temperature is in the range of 60° to 120° C., and having a...
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5424901 |
Sidactor fail-safe device
An improved fail-safe mechanism is provided for use with a sidactor for protecting telecommunication equipment against high voltage surges. A sidactor includes first and second end terminal pins...
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5422779 |
Packaged solid-state surge protector
A solid-state surge protection device comprises a semiconductor chip sandwiched between two electrodes. A resilient sealing member or layer comprised of a thermoplastic or thermosetting resin...
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5414587 |
Surge suppression device
A surge suppression device which fits over the end of an electrical plug and permits normal mating of the plug with the female receptacle. In the preferred embodiment, the device includes a body of...
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5414583 |
Current source bus terminator with voltage clamping and steady state power reduction
A bus terminator, for a computer bus, which is capable of providing maximum allowable current to the bus, voltage clamping of the bus and steady state power reduction when the bus is in the...
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5410443 |
Telephone line overvoltage protection
A telephone line overvoltage protection method and assembly are provided. The telephone line overvoltage protection assembly includes a telephone line station protector having at least first and...
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5408379 |
Device for opening a circuit and device for protecting the circuit against surges
An insulating substrate has a heat generating resistor and an electrical conductor on its surface. A pair of conductors, such as power or communication leads, are connected to a protected circuit....
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5398152 |
Overvoltage protector
An overvoltage protector for protection of telecommunication equipment having a pair of line terminals, and a respective pair of levers forming part of the ground circuit, with an overvoltage...
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5392349 |
Overvoltage protection scheme for subscriber loops and method of performing same
By opening switches coupling a subscriber loop to circuits in a SLIC when an overvoltage condition occurs, the SLIC is protected from damage. The overvoltage is detected by a overvoltage protector...
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5390231 |
Protection and recovery of telephone line interface circuits
An automatic protection and recovery method for a telephone line interface circuit is described. The interface circuit monitors current on the line, and in the event of a fault producing an...
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5388023 |
Gas-disccharge overvoltage arrester
A gas-filled three-electrode overvoltage arrester may be developed in such a manner that it has dependable "fail-safe" and "vent-safe" behavior. For this purpose, a two-arm spring clip (10) is...
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5386335 |
Surge absorber
In a surge absorber, capable of suppressing a voltage surge and a current surge together without interrupting a signal transmission, an input electrode and an output electrode are spaced apart on...
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5384679 |
Solid state surge protectors
The present invention relates to solid state surge protectors, having thermally sensitive fusible fail short protection associated therewith, enclosed in a hollow housing which provides three...
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5383085 |
Assembly for the discharge of electric overvoltages
As a known "back-up device" for a gas-filled over-voltage arrester, a voltage-dependent resistor (6) is arranged centrally in a housing with the over-voltage arrester (1). The varistor (6) can, in...
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5377067 |
Junction box with protection function to protect from overvoltage and overcurrent
A junction box for the protection of electronic devices and communication lines from lightning surges, overcurrent and overvoltage. The box includes sockets for connection to the devices and liens...
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5373413 |
Surge arrester having solid state switch
A surge arrester for telephone lines comprises a threaded metal enclosure for insertion into a threaded well of a station protector. The protective element within the threaded metal enclosure is a...
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5373410 |
Single string resistive divider network for a digital multimeter
A relatively large protection resistor is connected between the measurement in-out terminal and the internal circuitry of a digital multimeter. A clamping circuit at the input to the internal...
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5371648 |
Plug-in protection module for a module for rapid interconnection of telephone lines
This invention relates to a protection module provided to receive an overvoltage arrester in a receptacle and designed to plug on the protection ring of a telephone line interconnection module. The...
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5371647 |
Surge protection circuit module and method for assembling same
Sets of six steering diodes and an ungated Thyristor are simultaneously formed into surge protection circuit modules by mass production techniques. An extended lead frame is provided with three...
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5369626 |
Lightning protection for seismic data acquisition system
A lightning protection system is disclosed for a seismic data acquisition system having single or multiple geophones positioned at predetermined ground locations over a large area. A surge...
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