|
Match
|
Document |
Document Title |
|
|
4876621 |
Line protector for a communications circuit
A line protector for a communications circuit. The line protector has an overvoltage arrestor such as a three electrode gas tube, two of whose electrodes are connected to the line input terminals...
|
|
|
4876626 |
Central office protector module with alarm indicator
A central office protector module which includes a light to provide a visual indication whenever the module shorts either of the lines protected by the module to groud as a result of either a...
|
|
|
4875868 |
Electrically protected connector for telephone distribution frames
A plug-in module may be added to terminals on an existing telephone distribution frame. Electronic modules may be added to the plug-in modules to provide surge and lightning protection and the...
|
|
|
4868876 |
Electrostatic discharge protection device
An electrically conductive network which, at one end, has a low-resistance connection with a user's hand and, at the other end, has a high-resistance connection with ground. This protects...
|
|
|
4866562 |
Self-contained air gap assembly
A self-contained air gap spark arrester assembly is disclosed which may be constructed and tested prior to its incorporation into a fail-safe surge arrester assembly. The air gap spark arrester...
|
|
|
4866561 |
Lightning arrester device comprising at least one fusible element
The lightning arrester device comprises an external metal casing (1) defining an enclosure (2) containing a neutral gas, and at least one metal rod (3a, 3b) forming an electrode and penetrating...
|
|
|
4866560 |
Safeguarding electrical transient surge protection
Electrical transient surge protection plus safeguarding of surge-protection apparatus against failure at high temperature. Thermally sensitive fusible devices are used in conjunction with...
|
|
|
4862311 |
Overvoltage protector for use with data cables
An overvoltage protector for use with data cables. The protector is connected between the data cable and the piece of equipment to which the data cable is ordinarily connected. The equipment has a...
|
|
|
4862309 |
Protection circuit for battery feed circuit
A protection circuit for a battery feed circuit used in a switching system. The protection circuit is comprised of: a supervising circuit for detecting an abnormal current flowing through a battery...
|
|
|
4862314 |
System for providing power to a central office protector module with alarm indicator and including remote alarm indication
A system for providing power to a central office protector module which has a visual indicator for indicating an alarm whenever one of the two lines protected by the module is shorted to ground by...
|
|
|
4860155 |
Overvoltage protection device
A circuit protection device comprising a chalcogenide glass threshold switching element connected or arranged to be connected between a current carrying line and earth, and a capacitor connected in...
|
|
|
4856059 |
Semiconductor subscriber line interface circuit with enhanced survivability
A subscriber line interface circuit using integrated semiconductor circuit is provided with improved immunity to overvoltage and overcurrent conditions by increasing value of the battery feed...
|
|
|
4853960 |
Station interface and protector apparatus
A station interface and protector apparatus for use on a telephone line pair includes a protector device having terminals connected from each line to a ground terminal, via a gas discharged tube...
|
|
|
4846735 |
Telecommunication terminal strip
The invention relates to a terminal strip or blocks in telecommunications, comprising a support plate with terminal elements for conductors to be plugged thereon and of a strip-like upper part to...
|
|
|
4847724 |
Overvoltage protected integrated circuit
The circuit relates to the protection of some integrated circuits connected with transmission lines and therefore liable to be subject to overvoltages. The protection comprises diodes (D1, D2, D3)....
|
|
|
4845580 |
A.C.-D.C. Spike eliminating bandpass filter
A spike elimination circuit for A.C. and D.C. power sources comprises two gas tube and/or two semiconductor voltage limiting devices before a Bandpass Filter. The Bandpass Filter consists of 2...
|
|
|
4827502 |
Environmentally protected housing for using central office protector modules outdoors
An environmentally protected housing for receiving a connector block in which a multiplicity of central office protector modules can be mounted. The housing is designed such that its surface area...
|
|
|
4823383 |
Protection device for terminal equipment on telephone subscriber premises
The protection device in accordance with the invention is connected in series with the line. It comprises either a circuit (1) for providing protection against voltage surges, or else a filter (2)...
|
|
|
4821315 |
Electronic contacts and associated devices
High voltage electronic contacts (S, S') and associated devices including TRIMOS (MOS TRIacs) devices connected in anti-parallel fashion between two terminals (S 1 /S' 2 , S 2 /S' 1 ). Each...
|
|
|
4813891 |
Electrical connector for diverting EMP
An electrically conductive block assembly is provided for positioning contact pins in an electrical connector and dissipating high energy voltage pulses to a ground. A voltage variable material is...
|
|
|
4814941 |
Power receptacle and nested line conditioner arrangement
A power receptacle and nested line conditioner arrangement is provided for office partition systems and the like of the type having electrical power incorporated therein. The arrangement includes a...
|
|
|
4812942 |
Aerial cable terminal
An aerial terminal has an increased density of connections and can be mounted alternatively on a pole or a cable. It has a housing with parallel side walls and end walls and a central wall...
|
|
|
4800587 |
Telephone line protector with line disconnect and an entrance terminal assembly incorporating a plurality of protectors
A housing for a telephone line protector comprises a well in which are positioned two spring biased members. A first spring biased member is adjacent to the back end of the well and biased away...
|
|
|
4798969 |
Power feed system in transmission line between terminals of three-terminal station
A transmission line between terminals of a three-terminal station is branched by a branching unit and power is transmitted between the terminals of the three-terminal station and a power feed...
|
|
|
4796150 |
Telecommunication protector unit with pivotal surge protector
A solid state protector unit has a single voltage protection device shared by both tip and ring conductors to protect telephone equipment in a central office or other location from surges of...
|
|
|
4783359 |
Electronic signal time dealy device and method of making the same
A preferably low dielectric constant polymeric bonding layer is applied or bonded (i.e., laminated or coated) to at least one side of a preferably low dielectric constant polymeric delay line...
|
|
|
4758921 |
Grounded surge protection unit for telephone subscriber circuits
An improved surge protection unit suitable for use with Western Electric Type 66 blocks, having provision for grounding of the individual subscriber circuit at the block location is disclosed.
|
|
|
4751607 |
Communication line transient protection
The severity of the problems of transmitting high speed data over a regular twisted wire pair are legendary. These problems arise from a variety of conditions, including the capacitance of the wire...
|
|
|
4748541 |
Modular contact system for telephone cable head
A modular contact arrangement for connecting various protective and/or monitoring devices to phase lines 6, 7 of a cable head in a telephone distributor frame includes a plurality of spaced,...
|
|
|
4748534 |
Device for establishing between conductors a galvanic connection, which is blocked for the transmission of electromagnetic radiation
Device for establishing such a galvanic connection between conductors of a first batch and conductors of a second batch that on the one hand signal transmission between the two batches can take...
|
|
|
4743999 |
Rotary telephone line surge protector and system
A rotary telephone line surge protector and system in which surge protector comprises a first and second housing, the second housing containing a grounding plug and non-conductive plug prongs to...
|
|
|
4742541 |
Telecommunications interface with protector modules
An interface for connection between incoming telephone lines and the customers equipment has a base for mounting on a support surface, with terminals for connection of incoming telephone lines and...
|
|
|
4741711 |
Modular distribution frame including protector modules adapted for break access testing
A modular distribution frame is disclosed which includes a module block having first and second parallel opposing rows of wire connectors. Apertures in the block provide access to the connectors....
|
|
|
4737880 |
Station protector for communications lines
A station protector for communication lines includes a line terminal formed for electrical connection to the communication lines and affixed to a base member of electrical insulator material. The...
|
|
|
4737776 |
Circuit for detecting cut telephone service line and transmitting signal over telephone trunk line
The present invention is a circuit for activating a local alarm when a telephone service line is cut. A closed loop circuit is formed by a pair of insulated monitor wires electrically connected at...
|
|
|
4736269 |
Voltage surge limiter with grounding assembly
A protector module (30) for protecting the conductors of a telephone loop cludes a pair of protector assemblies (40-40') which are supported within a common housing (32). A gas tube voltage...
|
|
|
4730229 |
Male base subscriber circuit protector module
A male base subscriber pair protector module in which substantially all of the internal components thereof are assembled upon an axially elongated base element prior to insertion within a module...
|
|
|
4729064 |
Modular interconnect block with protector structure
A distribution frame comprising interconnect block modules for use in telecommunications is disclosed. The frame is front accessible for both wiring and test access. The structure incorporates a...
|
|
|
4729055 |
Surge protection element for telephone lines, or data transmission lines or the like
The surge protection element comprises an inert gas-filled protective device with electrodes inserted between two line input terminals, these terminals being connected respectively to branch...
|
|
|
4727571 |
Circuit for surge voltage protection in electronic telephone stations
A circuit for surge voltage protection of therefor a telephone station has first and second input terminals for receiving a DC supply voltage via a two-wire subscriber line. Both terminals are...
|
|
|
4723190 |
Safety device communication equipment
A safety connector providing an overcurrent protective element, an overvoltage protective element and bimetal connecting terminals, in which the overcurrent protective element includes an upper...
|
|
|
4720845 |
Protective circuit for the overvoltage protection of a subscriber line interconnect circuit
The invention describes a protective circuit for the protection of the electronic interconnect circuit (SLIC) and the electronic switches for test access, by means of a threshold setting element...
|
|
|
4710846 |
Modular protector for telecommunications equipment
An adaptor terminates one or more modular protectors of the same size obviating the need for a telephone company to carry an inventory of many different sizes. Each modular unit, which protects a...
|
|
|
4709296 |
Protection arrangement for a telephone subscriber line interface circuit
The contacts of an isolation relay are positioned between a line interface circuit and the associated feed resistors, the relay being controlled to open the contacts in response to an excessive...
|
|
|
4704599 |
Auxiliary power connector and communication channel control circuit
An auxiliary connector circuit is used within an electronic system (10) which comprises a plurality of removable circuit cards (14, 16, 18, 20, 22, 24, 26) which are mounted within a cabinet (12)....
|
|
|
4701725 |
Radio frequency signal coupler
A radio frequency signal coupler includes first and second conductors formed on an insulating body for coupling signals between respective input and output couplings. A series resonant circuit is...
|
|
|
4701825 |
Line protector
A line protector device for providing an electrical conducting path between a line and ground upon an overvoltage appearing on the line includes an overvoltage device having a pair of...
|
|
|
4698721 |
Power line filter for transient and continuous noise suppression
A power line filter suppresses or dissipates and clamps short rise time high voltage transients carried by power transmission lines and provides continuous protection against continuous type...
|
|
|
4698722 |
Transient protection unit
Transient protection unit intended for connection to signal conductors for protecting equipment connected to the conductors against EMP and EMI. The unit includes primary protection components in...
|
|
|
4695916 |
Protector circuit
A protector circuit comprises series connection of a bidirectional voltage limiting element and a bidirectional thyristor between a signal line connected to a communication equipment and ground....
|