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5369543 |
Thyristor fail-safe device
A fail-safe device is provided for use with a thyristor having a main body sandwiched between electrically conductive end plates. The fail-safe device includes a spring body formed of electrically...
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5365660 |
Method of protecting a circuit in a telephone junction box
A protector module (50) includes a housing (52) having cavities (58) into which are inserted surge protector elements (150). Each protector element upon full insertion engages a deflectable contact...
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5367569 |
Network interface modules
A network interface module for providing connection between a customer's equipment and the telephone company owned portion of the customer loop is provided with a miniaturized easily removable...
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5359657 |
Telephone line overvoltage protection apparatus
An overvoltage protection apparatus used with a pair of telephone lines includes first voltage clamping circuitry for clamping voltage signals on the lines at a first predetermined voltage...
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5357568 |
Telephone line overvoltage protection method and apparatus
A telephone line overvoltage protection method and device are provided. An overvoltage protection apparatus used with a pair of telephone lines includes first voltage clamping circuitry for...
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5341269 |
Voltage protector and grounding bar arrangement for terminal block
A voltage protector and ground 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 form an...
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5341270 |
Drop resistant cup-arrester assembly
An arrester assembly for arresting over-voltage conditions in electric circuits and for isolating an arrester element from possibly harmful effects of external forces applied to the arrester...
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5336970 |
Gas tube protector
A gas tube protector includes a new coating for the electrodes. The coating, which eliminates the need for conditioning the electrodes prior to using or testing the protector, includes barium...
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5334553 |
Telecommunication equipment protector
A surge protection device to protect telecommunication equipment coupled to telephone lines is shown having in a first embodiment three cells with each cell having a semiconductor element with a...
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5323289 |
Lightning protection for field mounted instruments
A protection circuit is provided for protecting sensitive electrical field instruments from a transient voltage strike and for ensuring that the instruments will meet safety approval during high...
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5321577 |
Protector module for telephone line pair
A single modular assembly (10) has two terminals (18) in housing cavities (28) each with a pair of slots (38) for termination by rotary actuation to respective conductors of two cables, for...
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5318461 |
Terminal block assembly with slip-on module
A terminal block assembly includes a slip-on module removably connected at one end with a terminal block housing, characterized by the provision of a separating device mounted at an accessible...
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5317474 |
Module for telephone line conductor pair having single protector unit
A single modular assembly (10) has two terminals (16) in housing cavities (22) each with a pair of slots (46,48) for termination by rotary actuation to respective conductors (30,32) of two cables,...
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5299088 |
Protective circuit and protective plug for telecommunication installations
The invention relates to a protective circuit for the protection of the user from overvoltage and overcurrent, in particular for telecommunication installations. Prior art protective circuits...
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5296646 |
Protector module for telephone line junction box
A protector module (50) includes a housing (52) having cavities (58) into which are inserted surge protector elements (150). Each protector element upon full insertion engages a deflectable contact...
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5282109 |
Back-up air gaps
A miniature back-up overvoltage protection apparatus for use on an overvoltage protection device includes a housing adapted to be removably mounted on the first and second terminals of an...
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5278720 |
Printed circuit-mounted surge suppressor matched to characteristic impedance of high frequency transmission line
A surge suppressor for a high frequency transmission line contains a microstrip architecture comprising a dielectric sheet on a first side of which a signal conductor stripe layer is formed and on...
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5272280 |
Overvoltage protector assembly
An overvoltage protector assembly and a method of attaching a terminal member through a dielectric body. The assembly has a dielectric body, and line terminal members extending through the body...
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5272588 |
Surge protector
The present invention relates to a surge protector for suppressing a surge voltage generated on transmission lines, having an object to prevent system shut-down by grounding detected by terminal...
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5257157 |
Protector network for A-C equipment
The protector network disclosed in U.S. Pat. No. 4,675,772 is improved by omitting a specific inductor element from the filter means disclosed in that patent. The improved protector network is also...
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5254969 |
Resistor combination and method
An apparatus and method by which a flat film-type resistor is intentionally caused to thermal-shock fracture in response to a predetermined high-voltage overload condition. A stressed spring wire...
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5247273 |
Surge absorber for protection of communication equipment connected to communication lines
A surge absorber including a surge absorbing element for protecting communication equipment from transient surges and a thermal response switch with an automatic restoration function connected in...
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5243488 |
Protection circuit limiting overvoltages between two selected limits and its monolithic integration
A circuit for protecting lines such as telephone lines against positive or negative overvoltages having respective determined minimum values (+V1 and -V2). Between a common point (C) and a first...
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5241446 |
Overvoltage protector unit for well constructions
Overvoltage protector unit for use in a well in which an overvoltage protection device is mounted in a grounding housing and electrically separates a conductor pin in the housing from the housing...
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5237483 |
Protector system for low voltage power feed
A protector system is provided for use in a low voltage power feed arrangement including a device requiring a low voltage power feed, and a power source. The power source is capable of supplying...
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5227947 |
Arrester assembly with sealed back-up air gap
An assembly for defining a sealed back-up air gap, for use with a line protector comprising an over-voltage arrester housed within a canister and defining a back-up air gap therebetween, comprises...
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5224881 |
Connection strip having semi-integrated protectors
The invention relates to a connection strip for transmission lines, having two rows of tags on a tag block for the pairs of conductors that define the lines, and having lightning arresters...
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5224013 |
Miniature station protector modules
A miniature station protector module for communication systems includes a hollow housing into which is disposed a pair of line terminals with a ground terminal therebetween. The line terminals...
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5224012 |
Solid state station protectors
A miniature solid state surge protector apparatus for use in telephone central offices, or the like, that are provided with terminal blocks for communication lines which may include an in-line...
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5215478 |
Spark gap device
A spark gap device includes a conductive main body and an integral conductive flange, but no gap. The gap is formed by installing the device such that the flange positions an end of the main body...
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5208723 |
Solid state electronic protector with pressure release
A telephone line overcurrent protector adapted to be mounted on a circuit board is shown having a cup shaped housing in which a PTC element is placed with leads extending out of the housing through...
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5204799 |
Protective arrangement for telecommunications line interface circuit
A circuit protection device designed to protect a pair of electrical circuits by fracturing at such time as an overcurrent condition has occurred in a first of the circuits, this novel device...
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5198958 |
Transient suppression component
A transient suppression component includes a lead assembly adapted to permit in-line installation in a connector contact. One lead surrounds the other and is cylindrical for connection to the...
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5195015 |
Line protector for a communications circuit
A line protector for a communications circuit comprises a housing, an over-voltage arrester received in said housing and having axially opposite electrodes and a ground strip for coupling one of...
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5193044 |
Apparatus for line card power cross protection
A heat generating means, such a resistive element, is serially connected in a current-carrying conductive line, and a fusible link carrying current from said line is serially mounted between the...
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5191605 |
Telephone surge protector
A telephone protector comprises an encapsulated bidirectional voltage sensitive switch having three terminals protruding therefrom, one of the terminals being a grounding terminal. There is an...
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5187634 |
Fail-safe protector
A fail-safe device is provided for an overvoltage protector element where the protector includes a body having first and second contact surfaces and a tip lead, a ring lead and a ground lead...
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5181864 |
Connector
A connector comprising a housing having a varistor-characteristic resin portion, and signal coupling terminal conductors which penetrate the varistor-characteristic resin portion. The housing...
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5175662 |
Device including an MTU and protector
Disclosed is a device which includes a Maintenance Termination Unit (MTU) and surge protector in a single 5-pin package. In accordance with one embodiment, a base includes an array of spring...
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5172295 |
Voltage limiter arrangement with receiving member for connection to a surge arrester magazine
A voltage limiter arrangement, including a voltage limiter including a central connecting lead and outer connecting leads positioned on each side of the central connecting lead. A surge arrester...
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5172296 |
Solid state overvoltage protector assembly
A line protector for a communications circuit comprises a generally cup-shaped housing; and a generally disc-shaped solid state overvoltage arrester having electrodes formed at axially oppositely...
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5166855 |
Surge protector with thermal failsafe
The surge protector includes a device for connecting a transmission line to ground in the event of excess voltage or current, to protect communications equipment. A thermal sensitive element,...
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5161183 |
Overvoltage protection circuits
An overvoltage protection circuit for a pair of conductors carrying a balanced signal includes two similar protection elements connected in series between the conductors and two equal value...
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5157580 |
Protective plug for connector banks of telecommunication and data systems
The invention relates to a protective plug (1) for connector banks (20) of telecommunication and data systems, comprising a housing (2) for receiving protective elements (7, 8, 9) connected to...
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5155650 |
Thyristor fail-safe
A fail-safe device is provided for a thyristor where the thryistor has a body member with extending tip, ring and ground leads. The fail-safe device includes an electrically conductive spring...
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5154639 |
Protective plug for a distributor strip utilized in telecommunications systems
A housing for a protective plug including a surge arrester is composed of a pedestal-like lower portion and of an upper portion which is joined of one piece thereto via film hinges. The upper...
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5155649 |
Surge protector for telecommunications equipment
An overvoltage protector for protecting equipment, especially telephone equipment, against high voltage surges such as are caused by lightning in the vicinity of the equipment or the cables to...
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5153911 |
Weatherproof telephone terminal apparatus
A weatherproof telephone terminal apparatus includes a terminal assembly having a pair of terminal members included therein suitable for splicing insulated telephone wires of the same or different...
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5150271 |
Telecommunication equipment protector
A simplified solid state transient voltage and overcurrent protector for telecommunications equipment providing uniform protection characteristics between telephone lines and between either line...
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5146384 |
Automatically resetting protection arrangement for a telephone subscriber line interface circuit
A protection arrangement for coupling a two-wire line to a SLIC includes surge protecting triacs between each wire and ground, and normally closed contacts coupling the wires to the SLIC. The...
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