Having Protective Circuit Patents (Class 379/331)
  • Patent number: 8874109
    Abstract: A method and system automatically activates a mobile station in a wireless communications network. The system includes an over the air activation function (OTAF) processor in the network that initiates an activation process in response to receiving a registration message from a mobile switching center serving the mobile station requesting the activation. Each mobile station has a unit of information stored into it at the time of its manufacture to enable it to request over the air activation. That unit of information is either the network routing address of the OTAF processor, or alternately, it is a value that is translatable into that address, either an OTAF ID number that is the same value for every mobile station or it is a sequentially serialized dummy value for the mobile identification number (a dummy MIN).
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: October 28, 2014
    Assignee: AT&T Mobility II LLC
    Inventors: Arun K. Chatterjee, Brian Kevin Daly, David William James Holmes, Ileana A. Leuca
  • Patent number: 8855293
    Abstract: The disclosed embodiments include a surge protection module that includes an overvoltage protection component and a ground pin configured on a bottom end of the surge protection module. The ground pin is in electrical communication with the overvoltage protection component. The surge protection module also includes a pair of outside plant tip and ring pins configured on the bottom end of the surge protection module. The pair of outside plant tip and ring pins in electrical communication with the overvoltage protection component. The surge protection module is configured to receive a wire wrap pair consisting of a central office tip wire and a central office pin wire. The central office tip wire and the central office pin wire are configured to be in electrical communication with the overvoltage protection component.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: October 7, 2014
    Assignee: CenturyLink Intellectual Property LLC
    Inventors: Michael L. Elford, Pete Kawamoto, Diana Unser, Warren Novak
  • Patent number: 8804634
    Abstract: A method comprising detecting closed subscriber group (CSG) proximity based on an autonomous search function; signaling a proximity indication to a network, wherein the proximity indication includes at least one priority of at least one allowed neighbor CSG cell. A method comprising, performing measurements on neighboring CSG cells; and generating a measurement report including measurements of at least one neighboring CSG cell; and transmitting a message including a measurement report and a CSG priority for at least one CSG cell.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: August 12, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Sylvie Gomes, Diana Pani, Paul Marinier
  • Patent number: 8649502
    Abstract: A protection cover mechanism is disclosed. A hollow hinge tube is connected to a protective cover. A first hinge cover body is connected to the hollow hinge tube and includes a positioning rib. A spring is disposed in the first hinge cover body and abuts the hollow hinge tube. A hollow driven member is movably disposed in the first hinge cover body and abuts the spring. The spring is abutted between the hollow hinge tube and the hollow driven member. The hollow driven member includes a protrusion. The positioning rib is positioned on the hollow driven member, forcing the hollow driven member to move linearly with respect to the first hinge cover body. A fixing base includes a hollow tube fit on the hollow driven member and having an annular inner guide track with an undulated profile. The protrusion abuts the annular inner guide track.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: February 11, 2014
    Assignee: Quanta Computer Inc.
    Inventors: Jung-Wen Chang, Ming-Yuan Lan, Ching-Chung Wang, Lin-Wei Huang
  • Publication number: 20130343537
    Abstract: The disclosed embodiments include a surge protection module that includes an overvoltage protection component and a ground pin configured on a bottom end of the surge protection module. The ground pin is in electrical communication with the overvoltage protection component. The surge protection module also includes a pair of outside plant tip and ring pins configured on the bottom end of the surge protection module. The pair of outside plant tip and ring pins in electrical communication with the overvoltage protection component. The surge protection module is configured to receive a wire wrap pair consisting of a central office tip wire and a central office pin wire. The central office tip wire and the central office pin wire are configured to be in electrical communication with the overvoltage protection component.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 26, 2013
    Inventors: Michael L. Elford, Pete Kawamoto, Diana Unser, Warren Novak
  • Patent number: 8411848
    Abstract: In a telephone interface circuit, a first NPN transistor switch-controls a connection between a speech circuit and a pair of subscriber lines. A second PNP transistor controls an on/off state of the first transistor. A positive feedback circuit connects a collector terminal of the first transistor to a base terminal of the second transistor. An internal power source supplies current for driving the second transistor. The first transistor operates in a saturated region when a voltage that is in a range of standard voltages delivered over a pair of subscriber lines for normal operating conditions of a subscriber line device that is not being subjected to an over-voltage or an over-current event is applied in between the pair of the subscriber lines. The first transistor operates in an unsaturated region when an overvoltage exceeding said range of standard voltages is applied in between the pair of the subscriber lines.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: April 2, 2013
    Assignee: Uniden Corporation
    Inventor: Yoshinobu Fujiwara
  • Patent number: 8077854
    Abstract: An electronic device and a protection cover thereof are provided. The electronic device includes a cap body, a main body, a flexible printed circuit board and a protection cover. The protection cover includes a receiving portion and a combining portion. The receiving portion has a first end and a second end, wherein the first end is coupled to an upper surface of the main body and the second end connects to the combining portion. As the cap body moves from a first position to a second position on the main body, the combining portion is coupled to a bottom surface of the cap body, so that when the cap body rotates in the second position, the protection cover moves along with the cap body and covers the flexible printed circuit board.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: December 13, 2011
    Assignee: HTC Corporation
    Inventors: Chung-Yuan Ou, Ching-Shih Chen, Chang-Hwang Chiou, Chin-Chung Shih
  • Patent number: 7583798
    Abstract: Provided is an apparatus for protecting a multi-function product from surge voltage, the multi-function product including a public telephone network connection unit which receives one of a ring signal, a voice signal, and a fax signal and transmits the signal via first and second signal lines and an external apparatus connection unit which is connected to an external apparatus, receives a data signal from the external apparatus, and transmits the data signal via the first and second signal lines, the apparatus including: a first surge voltage cut off device having first and second terminals, wherein the first terminal is connected to the first signal line and the second terminal is connected to the second signal line; a second surge voltage cut off device having first and second terminals, wherein the first terminal is connected to the first signal line; a switching unit having a first terminal connected to the second signal line and a second terminal connected to one of a first contact point connected to the
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: September 1, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Eog-kyu Kim
  • Patent number: 7570951
    Abstract: A method is provided that comprises detecting, by a first user terminal of a wireless system, a second user terminal having wireless system information. The wireless system information has timely wireless system parameters. The timely wireless system parameters are collected from the second user terminal. The first user terminal communicates with a base station based on the wireless system parameters.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: August 4, 2009
    Assignee: Motorola, Inc.
    Inventors: Brian K. Classon, Michael D. Kotzin, Ravi Kuchibhotla, Kevin L. Baum, Vijay Nangia, Philippe J. Sartori
  • Patent number: 7570950
    Abstract: A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and maximum radio branch number of the mobile station, when the mobile station detects the plurality of addition branch candidates and deletion branch candidates. The mobile station inserts a plurality of addition branch candidates and deletion branch candidates, that is, all the DHO candidates into one handover trigger signal, and notifies the network. The addition branch candidates are put into addition information parameters in the handover trigger signal, and the deletion branch candidates are put into deletion information parameters. To simplify processing on the network side, the network side separates the addition branch candidates from the deletion branch candidates, and carries out sequential processing of them independently.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: August 4, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Tomoyuki Ohtani, Motoshi Tamura, Takaaki Sato
  • Patent number: 7522721
    Abstract: A system for delivering broadband service, including standard telephone service and telephone/DSL service, to a subscriber. The system includes a pair gain system and a service distribution system. In some embodiments, the service distribution system is located such that the standard telephone service and telephone/DSL service are routed from the service distribution system without being routed through a cross-connect system. In other embodiments, the functionality of a cross-connect system is incorporated into the service distribution system. The service distribution systems include terminating modules and switching modules. In some embodiments, the switching modules include protector plugs that protect the system from over-voltages and/or over-currents, and provides upstream and downstream diagnostic testing.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: April 21, 2009
    Assignee: ADC Telecommunications, Inc.
    Inventor: Bryan Kennedy
  • Patent number: 7039685
    Abstract: 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 constructed to receive (401) instructions via the internet (103) from a remote terminal (101). The instructions are interpreted and converted into one or more commands that are directed (405) to a slave board (113 or 117) that performs, in response to the command(s), one or more operations on a telephone line and its associated hardware and/or software (115), a piece of test equipment (125), lights (123), or other type of electronic device. Any results of the operations may be returned to the terminal (101).
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: May 2, 2006
    Assignee: Lucent Technologies Inc.
    Inventors: Herbert Wayne Halcomb, Marlon Zbigniew Kasprzyk, John Michael Kyser, Zbigniew Pancerz
  • Patent number: 6914976
    Abstract: 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 secured to the base to form a sealed first compartment within the housing. A second cover is removably secured to the base to form an unsealed second compartment within the housing. A connection board is mounted within the second compartment and includes a plurality of insulation displacement connectors for the connection of telephone lines that extend external to the customer service terminal. An electronic board is mounted within the first compartment, and electronic components thereon are electrically connected to the insulation displacement connectors.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: July 5, 2005
    Assignee: Carrier Access Corporation
    Inventor: James Andrew Bloemen
  • Patent number: 6760424
    Abstract: 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 protected connection and second cross connections protecting the respective first cross connection for the protecting connection are established between corresponding termination points within these network elements, whereby this occurs in each network element independently of the respectively other network element.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: July 6, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Mutz, Thomas Sarfert
  • Publication number: 20030007629
    Abstract: A main distribution frame (MDF) is provided for providing the user with ADSL services by simply making a slight modification to a conventional main distribution frame and performing an extremely simple wiring operation. An inlet splitting plane (ISP) and a high pass filter splitting plane are also provided which can be suitably used in the main distribution frame. The main distribution frame has an outlet splitting plane, the inlet splitting plane having a low pass filter, and a high pass filter splitting plane having a high pass filter. The outlet splitting plane is connected to supply its output to the inlet splitting plane and high pass filter splitting plane in parallel. The inlet splitting plane is connected to a telephone exchanger system, while the high pass filter splitting plane is connected to an ADSL system.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 9, 2003
    Applicant: NEC CORPORATION
    Inventor: Minoru Unsai
  • Patent number: 6381477
    Abstract: 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 comparing the supply voltage to a predetermined threshold voltage. When the supply voltage is below the threshold, a next step includes supplying normal functionality to the phone and returning to the comparing step. However, when the supply voltage is above the threshold, a next step includes powering down a connection to the SIM card to limit functionality of the communication device.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: April 30, 2002
    Assignee: Motorola, Inc.
    Inventors: Robert M. Johnson, Jr., Peter McMahan
  • Patent number: 6359770
    Abstract: 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 of bullet connectors that are attached to the circuit board and plug into holes in a power supply bus bar.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: March 19, 2002
    Assignee: Marconi Communications, Inc.
    Inventors: Timothy Kolody, Scott C. Lewis, Richard E. Trifiletti, Duncan E. Estep, Steven T. McWilliams
  • Patent number: 6104805
    Abstract: 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 device within the building entrance protector. The fire-resistant plate has a narrow opening comprised of a primary aperture and a wiring access slot. The wiring access slot permits insertion of terminated individual wiring into the primary aperture. A method in accordance with the present invention is also described.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: August 15, 2000
    Assignee: Lucent Technologies, Inc.
    Inventor: Bassel Hage Daoud
  • Patent number: 6035032
    Abstract: 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 fields on a backboard, wall or other structure. The foldable distribution field is preferably configured using double sided tool-less insulation displacement type connectors on the distribution side of the foldable field. The double sided terminal block includes double sided insulation displacement terminal strips with a reversible test feature.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: March 7, 2000
    Assignee: Lucent Technologies Inc.
    Inventor: Bassel Hage Daoud
  • Patent number: 6002570
    Abstract: 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.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: December 14, 1999
    Assignee: TII Industries, Inc.
    Inventors: Carl H. Meyerhoefer, Nisar A. Chaudhry, Thomas J. Smith
  • Patent number: 5970136
    Abstract: 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 method features removing any protective covering from a space previously designated for but lacking a protection block equipment and installing in the space interface equipment. The installation includes securing the equipment physically in place and connecting the equipment for communications with a distribution service, such as T1 carrier service, at a first interface and a plurality of customer premise service interfaces, such as ISDN BRI interfaces, to customer premises lines at a second interface. The remainder of the remote cabinet communications is left unaffected.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: October 19, 1999
    Assignee: Conklin Instrument Corporation
    Inventors: John C. Mantovani, David B. Milliron, Joseph F. Zimmerman
  • Patent number: 5802168
    Abstract: 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 described. The method features removing any protective covering from a space previously designated for but lacking a protection block equipment and installing in the space ISDN Basic Rate Interface equipment. The installation includes securing the equipment physically in place and connecting the equipment for communications with a T1 carrier service at a first interface and a plurality of ISDN BRI interfaces to customer premises lines at a second interface. The remainder of the remote cabinet communications is left unaffected.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: September 1, 1998
    Assignee: Conklin Instrument Corp.
    Inventors: John C. Mantovani, David B. Milliron, Joseph F. Zimmerman
  • Patent number: 5734542
    Abstract: 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 being protected according to a second limiting voltage.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: March 31, 1998
    Assignee: Panamax Corporation
    Inventor: Richard L. Cohen
  • Patent number: 5696820
    Abstract: 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 single telephone line pair. The electrical grounding, earthing bar extends along the length of the in-line wire terminating base and includes a pair of electrical grounding terminals received in electrical and mechanical contact engagement with an electrical grounding member of the in-line wire terminating base. The electrical grounding, earthing bar includes an elongated straight plate portion extending between the pair of electrical grounding terminals. The electrical grounding earthing bar is configured for easy assemble, manufacture and cleanability. The integral module includes a printed wiring board carrying protection circuitry for conditioning the single telephone line pair.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: December 9, 1997
    Assignee: Oneac Corporation
    Inventors: Dimitris Jim Pelegris, Murray Delamoreaux, Michelle Hahnlein, Terry Drake
  • Patent number: 5691872
    Abstract: 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 to x/2 of the protected paths. Using different modular jack connections, it is possible to use the surge protection circuit to protect either one line of x wires (paths), or two lines of x/2 wires.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: November 25, 1997
    Assignee: Panamax Corporation
    Inventor: Richard L. Cohen
  • Patent number: 5509066
    Abstract: 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 connectors (14E) and the output connectors (14S), with channels (16) suitable for guiding the corresponding link wires being associated with the output connectors (14S). According to the invention, the channels (16) associated with the output connectors (14S) in the same row (20) are grouped together inside a guide plate (21) which extends on edge and in alignment with the row (20), and each of the rows (20) of input connectors (14E) and output connectors (14S) aligned in this way with the guide plates (21) is flanked on one side by a passage (22) in which a filtering and/or protection module (17) can extend. Application, in particular, to connection strips.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: April 16, 1996
    Inventor: Yves Saligny
  • Patent number: 5425099
    Abstract: 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.degree. to 120.degree. C., and having a thickness of 2.5 to 5.0 mm, and electrodes formed on both major surfaces of the ceramic body.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: June 13, 1995
    Assignee: Murata Mfg. Co., Ltd.
    Inventors: Kenji Takakura, Katsuyuki Uchida
  • Patent number: 5295185
    Abstract: 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 direct current voltage. The transformer contains a primary winding and a base-driving winding in a primary side, and a secondary winding in a secondary side. The control transistor is connected in series to the primary winding and the direct current power source, and controls a current flowing in the primary winding. The rectifying and smoothing circuit rectifies and smooths a current generated in the secondary winding. The invertor circuit for converting a direct current output of the rectifying and smoothing circuit into an alternating current. The invertor controlling circuit controls the invertor circuit.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: March 15, 1994
    Assignee: Fujitsu Limited
    Inventor: Toshihumi Washio
  • Patent number: 5161183
    Abstract: 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, so that the junction point of the two elements is at a voltage midway between the voltages on the conductors and the protection elements present equal capacitances to the conductors. A third protection element is connected from the junction point of the two elements to ground to protect against excessive voltages relative to ground on the conductors. The voltage division provided by the resistors may be adjusted to improve the balance of the capacitances presented by the two protection elements.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: November 3, 1992
    Assignee: Texas Instruments Incorporated
    Inventor: Michael Maytum
  • Patent number: 5125027
    Abstract: 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 polarity reversal, a transmission bridge (22) including a line loopback circuit operating via a second optocoupler (74) and provided with regulator and blocking means; it further comprises simplified tone and charging pulse detectors (24, 18).
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: June 23, 1992
    Assignee: Alcatel Business Systems
    Inventors: Raymond Blaszykowski, Robert Girard, Andre Bonvallet
  • Patent number: 5121284
    Abstract: 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 drive mode and an idle mode of operation. In the drive mode of operation, the driver stage produces a data output signal at the output which corresponds to a data input signal received by the driver stage. In the idle mode, the driver stage produces an idle signal, in response to a control signal, which functions to discharge the conductive load. The feedback circuit produces the control signal in response to the idle signal and adjusts the control signal so that the idle output signal will approach a predetermined neutral level. The inductor will proceed to discharge and, once discharged, will shift the idle voltage.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: June 9, 1992
    Assignee: National Semiconductor Corporation
    Inventors: Keith K. Onodera, Shu-ing Ju
  • Patent number: 5077630
    Abstract: 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 connector in electrical communication with the first end of a positive temperature coefficient thermistor and the second end of a positive temperature coefficient thermistor in electrical communication with the peripheral of a integrated services digital network. The thermistor thereby preserves the termination function of the network for in fault and no fault conditions. diagnostic purposes.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: December 31, 1991
    Assignee: Delta Design and Development Co.
    Inventor: Dale C. Bina
  • Patent number: 5034846
    Abstract: 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. The circuit board has thereon a circuit which includes a plurality of circuit elements removably received in the circuit board. The circuit is coupled to the communication circuit and to the communication line with the circuit elements coupled therebetween. The circuit elements are selected from among a plurality of circuit element types, i.e., jumper wires, solid state voltage suppressors, and fuses, to configure the plug protector for the selected coupling or coupling and protecting.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: July 23, 1991
    Assignee: Donald E. Hodge
    Inventors: Donald E. Hodge, Raymond A. Loturco
  • Patent number: 5003588
    Abstract: 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 respective semiconductor switches whereas the current required by the protective thyristors is provided by the interfering source, for example, by a stroke of lightning.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: March 26, 1991
    Assignee: Siemens Aktiengesellshaft
    Inventor: Norbert Wingerath
  • Patent number: 4924345
    Abstract: 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 terminals from a terminal block. The interior of the housing is loaded with four contact members which are adapted to effect electrical connection with a three element surge suppressor (e.g. transistor) and a pair of small cylindrical fuse elements. Each of the four contact members include a female connector communicating with the four aligned openings in the housing. The housing interior also includes a ground contact which electrically connects to the middle element on the surge suppressor. The ground contact passes through a lateral opening in the housing for mating with a novel plug-on grounding bus connector.
    Type: Grant
    Filed: May 4, 1988
    Date of Patent: May 8, 1990
    Assignee: The Siemon Company
    Inventors: John A. Siemon, Howard Reynolds
  • Patent number: 4905119
    Abstract: 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 sensitive switch includes first and second terminals. The first terminal of the second switch is connected to the second terminal of the first switch, and the second terminal thereof is connected to the ring line. A third voltage sensitive switch includes first and second terminals. The first terminal of the third switch is connected to the second terminal of the first switch and to the first terminal of the second switch. The second terminal of the third switch is connected to ground potential. The switches are conductive when a respective voltage threshold is exceeded.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: February 27, 1990
    Assignee: Teccor Electronics, Inc.
    Inventor: Monty F. Webb
  • Patent number: 4878146
    Abstract: 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 outwardly from the nonconductive cap. The head of the terminal post is in the cap. The surge arrester communicates between the head and the conductive housing.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: October 31, 1989
    Assignee: Reliance Comm/Tec Corporation
    Inventor: Richard Kaczmarek
  • Patent number: 4876620
    Abstract: 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 gates connected together and directly to a control terminal which has a connection to the wire via a resistance which determines an overcurrent threshold level for the device. The reference point is ground for the ring wire protection device, and is desirably the ring wire for the tip wire protection device, whereby a directional sensitivity of the protection devices is taken advantage of and the overcurrent threshold level can be reduced. Zener diodes connected between complementary thyristors provide for convenient overvoltage protection.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: October 24, 1989
    Assignee: Northern Telecom Limited
    Inventor: Jerzy Borkowicz
  • Patent number: 4856060
    Abstract: 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 sensitive. Solder preforms are resiliently urged against integrated circuit units by a shorting spring, mounting the solder preforms allowing the shorting spring to ground the individual circuit. The solder preforms including a camming circuit allowing the shorting spring to urge the preform perpendicularly to the normal direction of spring movement.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: August 8, 1989
    Assignee: Porta Systems Corp.
    Inventors: Carl Meyerhoefer, Helmuth Neuwirth
  • Patent number: 4827502
    Abstract: 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 block and when the block and modules are mounted in the housing the top of the modules is just below the cover of the housing. Telephone cables which are used to connect to the cables from the central office and from the subscribers enter the housing and are wired to the rear of the connector block. The connector block is mounted in the housing and the modules are placed therein. A potting compound is then poured in the bottom of the housing to thereby environmentally seal the terminals and connections thereto on the rear of the protector block. The housing has a cover which has a suitable seal on its inside surface. The closing of the cover provides the environmentally protected housing.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: May 2, 1989
    Assignee: Reliance Comm/Tec Corporation
    Inventors: Louis Suffi, Robert H. Dawson