Class 379/331 - Having protective circuit

Subclass of Class 379 - Telephonic communications
Definition: Subject matter which prevents damage to the circuits of
No. of patents: 38
Last issue date: 09/19/2006

Number	Title	Issue Date
7110534	Terminal blocks and methods for making and breaking connections in a telecommunication conductor In embodiments of the present invention, telecommunications terminal blocks are provided for making and breaking connections between a first telecommunications conductor, a second telecommunications conductor and a service wire. The terminal block includes a housing...	09/19/2006
7039685	Method and apparatus for conducting subscriber's phone testing remotely via the internet An apparatus for and method of remotely controlling electronic devices, such as telecommunication equipment attached to telephone lines, test equipment, and/or home electronics includes a master board (105) having its own IP address and arranged and construct...	05/02/2006
6914976	TELECOMMUNICATIONS CUSTOMER SERVICE TERMINAL HAVING ELECTRONIC COMPONENTS SEALED IN A FIRST COMPARTMENT AND HAVING AN UNSEALED COMPARTMENT THAT CONTAINS AN INSULATION DISPLACEMENT CONNECTOR BOARD THAT INCLUDES VOLTAGE SURGE PROTECTION A telecommunications customer service terminal provides telecommunications service between a telecommunications line and a plurality of telephones and/or data processing devices. The customer service terminal includes a housing having a base. A first cover is secure...	07/05/2005
6760424	Method for establishing a protected communication segment between two network elements of a telecommunication network as well as a corresponding telecommunication network For establishing a protected communication segment between two network elements of a telecommunication network, a protected connection and a protecting connection must be set up. For this purpose, first cross connections carrying the communication traffic for the pr...	07/06/2004
6381477	Method and apparatus for protecting a circuit module in a communication device A method for protecting a circuit module in a communication device includes first detecting whether a circuit module is present in the communication device. A next step includes measuring a supply voltage to the communication device. A next step includes ...	04/30/2002
6359770	Power distribution circuit board with bullet connectors A telecommunications power distribution circuit board carries a fuse holder for a plurality of GMT fuses through which power is supplied to connectors on a terminal block. Power is supplied to the fuses through a distribution circuit on the board by way o...	03/19/2002
6104805	Swivel cable mounting arrangement requiring no wiring feed through hole A building entrance protector swivel cable mounting arrangement without a feed through hole requirement has an output wire termination device, a barrier wall comprises a fire-resistant plate for isolating the swivel cable from the output wire termination ...	08/15/2000
6035032	Multi-layered foldable cross connect field A foldable wire distribution field is provided whereby a non-connectorized double sided wire distribution field is hingeably connected and foldable over a standard feeder/protector field to eliminate the need for adjacent feeder fields and distribution fi...	03/07/2000
6002570	Residential protection service center Residential protection service center apparatus comprising an AC power meter, AC power line surge suppression, telephone line overvoltage protection and coaxial transmission line overvoltage protection, all tied to a common ground....	12/14/1999
5970136	IDSN capacity expansion for remote terminal sites A method and apparatus for increasing the capacity of a remote terminal cabinet and providing customer premise service interfaces to the remote cabinet which otherwise has insufficient additional physical slots to support such interfaces is described. The...	10/19/1999
5802168	ISDN capacity expansion for remote terminal sites A method and apparatus for increasing the capacity of a remote terminal cabinet and providing ISDN Basic Rate Interfaces to the remote cabinet which otherwise has insufficient additional physical slots to support such ISDN Basic Rate Interfaces is describ...	09/01/1998
5734542	Dual-line dual-voltage telecommunications surge protector A surge protection module which provides surge protection for at least two telecommunications lines, with some wires of each telecommunication line being protected according to a first limiting voltage, and other the wires of the telecommunications line b...	03/31/1998
5696820	Telephone and data communications line conditioner system A line conditioner system is provided for use with an in-line wire terminating base for terminating a plurality of telephone line pairs. The line conditioner system includes an electrical grounding, earthing bar and an integral module for conditioning a s...	12/09/1997
5691872	Single line, multiple line telecommunications surge protector A surge protection circuit having x protected paths, a first input connector connected to all x of the protected paths and a second input connector connected to fewer than x of the protected paths. For example, the second input connector may be connected ...	11/25/1997
5509066	Telephone distribution frame element, in particular a connection strip A telephone distribution frame element, of the type including firstly a plurality of input connectors (14E) and output connectors (14S) disposed in rows, and secondly at least one filtering and/or protection module (17) to be inserted between the input co...	04/16/1996
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 thickness of 2.5 to 5.0 mm, and electrodes formed on both maj...	06/13/1995
5295185	Ringing signal generation circuit with protection against overvoltage A ringing signal generation circuit contains a direct current power source, a transformer, a control transistor, a rectifying and smoothing circuit, an invertor circuit, and an invertor controlling circuit. The direct current power source generates a dire...	03/15/1994
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 resistors respectively connected in parallel with the elements, s...	11/03/1992
5125027	Central office line interface circuit for an analog network private telephone installation Central office line interface circuit connecting a private telephone installation to a local central office. The central office line interface circuit includes a twin-loop line current polarity detector including a first optocoupler (57) for signalling po...	06/23/1992
5121284	Driver circuit with feedback for limiting undershoot/overshoot and method A drive circuit suitable for driving an inductive load such as an isolation transformer is disclosed having a driver stage and associated feedback circuitry. The driver stage has at least one output for connecting to the load and is switchable between a d...	06/09/1992
5077630	Integrated services digital network terminating resistor with line fault protector An integrated services digital network terminator for use in an ISDN network and assosicated peripheral apparatus comprised of a first electricl connector in electrical communication with a intergrated services digital network. A second electrical connect...	12/31/1991
5034846	Plug protector A terminal connector or plug protector is selectively configurable for coupling or coupling and protecting an electronic communication circuit to a communication line. The plug protector has a housing and a circuit board which is received in the housing. ...	07/23/1991
5003588	Circuit arrangement for protecting electronic interface circuit of subscriber line circuits Thyristors utilized as protective elements receive trigger current by way of a respective semiconductor switch having a control electrode thereof coupled to a supply battery. The supply battery thus need only supply the sum of control currents for respect...	03/26/1991
4924345	Combined transient voltage and sneak current protector A combined transient voltage and sneak current protector is presented. The protector device comprises a two-piece substantially rectangular insulative housing. The housing has four spaced and aligned openings at the bottom thereof for receiving upstanding...	05/08/1990
4905119	Solid state overvoltage protection circuit An overvoltage protection circuit for electronic equipment having tip and ring lines includes a first voltage sensitive switch having first and second teminals. The first terminal of the first switch is connected to the tip line. A second voltage sensitiv...	02/27/1990
4878146	Line protector A line protector. The protector has a conductive housing which has a surge arrester therein. The housing has an open end and a closed end. A nonconductive cap closes the open end to thereby form an enclosure. A line terminal has its shank extending outwar...	10/31/1989
4876620	Protection devices and arrangements for telephone lines A two-wire telephone subscriber line protection arrangement consists of two protection devices each comprising a pair of complementary thyristors connected in reverse parallel with one another between a respective wire and a reference point, with their ga...	10/24/1989
4856060	Solid state telephone protector module A solid state protector module for individual subscriber circuits particularly suited for use with laminar type quick clip connector blocks. The module comprises a printed circuit board mounting integrated circuit protector units which are thermally sensi...	08/08/1989
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 is slightly larger than the surface area of the connector b...	05/02/1989
4345294	Overvoltage-arrester device for terminal- or junction blocks in telecommunication equipment In this overvoltage arrester device which takes the form of a plug-in-type insulation box (1) comprising a box top (1b) and a box base (1a) and in each case adapted to accomodate a plurality of laterally adjacent overvoltage arresters (4a,4b), the housing...	08/17/1982
4328524	Cable head with protection for a telephone exchange distributor A cable head includes a plurality of modular connection units, the insulating base of which bears rear and front connection members, and one earthing component. The cable head includes, in addition for each connection unit, at least one protection module ...	05/04/1982
4313147	Protective device for communication system A communication system protective device usable for various types of electrical communication lines, said device comprising a compact and simple arrangement of jack boards and protectors whereby an overvoltage or overcurrent induced in an outside line is ...	01/26/1982
4309736	Protective device for low-voltage lines A protective device protects low-voltage lines such as telephone lines of a cable. It is fitted to a cable connection head which comprises two junctions for connecting two conductive wires of each cable line to two conductive wires of a switching exchange...	01/05/1982
4250531	Switch-arc preventing circuit A switch-arc preventing continuous current circuit for protecting pulsing contact telephone exchange switches, the circuit having a first transistor in circuit with and controlled by a control transistor, the power electrodes of the first transistor being...	02/10/1981
4202025	A circuit for protecting an electronic exchange against overloads The invention relates to methods for protecting exchanges against overloads. It comprises introducing into an exchange elements which detect increases in temperature and supply numerical signals. The central control unit of the exchange receives these sig...	05/06/1980
4159500	Modular line protector An elongated line protector has a series of base modules for plug-in reception of a series of arrester modules, carbon or gas tube type as may be selected. Along opposed sides of the base modules are recesses for slide-on attachment of terminal modules ea...	06/26/1979
4156153	Electronic switch An electronic switch comprised of a C-MOS transistor is described. Associated with this transistor is a network consisting of MOS transistors which prevents the C-MOS transistor from being inadvertently turned on as a result of negative input voltages in ...	05/22/1979
4118603	DC signaling circuit for use in conjunction with isolation transformers The present invention relates to a DC signaling circuit operatively associated with a communication system having an isolation transformer interconnected between a central communication exchange center and a station site such as a power substation or gene...	10/03/1978

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Class 379/331 - Having protective circuit