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| Number | Title | Issue Date |
| 7002785 | Apparatus for protecting electronic circuitry A device for protecting the electronic circuitry of electrical appliances against damage from unacceptably high voltages. An element is interposed in the power supply paths which limits the application of an externally supplied excessive voltage to a predetermined t... | 02/21/2006 |
| 6956458 | Arrester disconnector assembly having a capacitor A disconnector assembly is provided for an arrester. A non-conductive housing has first and second opposite ends separated by an internal chamber. A first electrical terminal is connected at the first end. A second electrical terminal is connected at the second end.... | 10/18/2005 |
| 6876289 | Arrester disconnector assembly having a capacitor A disconnector assembly is provided for an arrester. A non-conductive housing has first and second opposite ends separated by an internal chamber. A first electrical terminal is connected at the first end. A second electrical terminal is connected at the second end.... | 04/05/2005 |
| 6828895 | Arrester disconnector assembly having a capacitor and a resistor A disconnector assembly is provided for an arrester. A non-conductive housing has first and second opposite ends separated by an internal chamber. A first electrical terminal is connected at the first end. A second electrical terminal is connected at the second end.... | 12/07/2004 |
| 6407908 | Gas-insulated circuit breaker and gas-insulated switch-gear having the same In order to provide a good gas-insulated circuit breaker which is compact and easy in assembling and preparation, a gas-insulated circuit breaker 100 is constructed with a grounded enclosure 104 enclosed a insulation nature gas, a current interruption par... | 06/18/2002 |
| 6366439 | Surge absorber without chips There is provided a surge absorber without chips in which a pair of discharge electrodes arranged facing to each other in a housing 1 are fixed by welding of the housing 1 with a distance between the discharge electrodes maintained. Clean and dry air or a... | 04/02/2002 |
| 6178078 | Discharge gap device and its mounting structure A discharge gap device which is provided between an antenna input terminal or a secondary side earth and a commercial power source, or between the power lines of a commercial power source as a ground discharge countermeasure for electrical equipments such... | 01/23/2001 |
| 6067003 | Surge absorber without chips There is provided a surge absorber without chips in which a pair of discharge electrodes arranged facing to each other in a housing 1 are fixed by welding of the housing 1 with a distance between the discharge electrodes maintained. Clean and dry air or a... | 05/23/2000 |
| 5959822 | Compact lightning arrester assembly A lighting arrester in the form of a double-ended polymer enclosure contains one or more varistor discs in vertical alignment having terminals at the opposing ends for external electrical connection. The discs are formed from a zinc oxide composition with... | 09/28/1999 |
| 5952910 | Isolator device for arrester A device for connecting, and then isolating and disconnecting an arrester includes a non-conductive housing with two electrical terminals. The housing has opposite ends separated by an internal chamber. The terminals are mounted at the housing ends. A res... | 09/14/1999 |
| 5898565 | Gas insulated switchgear apparatus A gas insulated switchgear apparatus comprising connection conductors connected to a connection portion to breaker side, disconnectors connected to the connection conductors, cable heads connected to the disconnectors, lightning arresters having one end c... | 04/27/1999 |
| 5790359 | Electrical surge protector with thermal disconnect A surge protection device comprising surge protector having a first terminal and a second terminal, one of the terminals being conductively connected to a first power transfer mechanism, such as a source of electrical power, and another of the terminals b... | 08/04/1998 |
| 5694284 | Discharge type surge absorbing element and method for making the same A discharge-type surge absorbing element that absorbs a surge by using the discharge that occurs between a discharge interval arranged within a sealed container filled with a discharge gas. The discharge-type absorbing element is characterized by a plural... | 12/02/1997 |
| 5604400 | Overvoltage protection element An overvoltage protection element for discharging transient overvoltages, with two electrodes (2), a disruptive discharge-spark air between the electrodes (2) and a housing (4) containing the electrodes (2). Each electrode (2) has a connecting leg (5) and... | 02/18/1997 |
| 5517081 | Gas-filled discharge tube A gas-filled discharge tube includes a cylindrical casing (11, 31), a terminal member (12, 13; 32, 33) for closing an open end of the casing, an inert gas sealed within the casing, a gas sealing tube (16, 38) connected to an outside of the terminal member... | 05/14/1996 |
| 5508675 | Miniature gas tube assembly with back-up air gap A miniature overvoltage protection device including a back-up air gap for use in miniature telephone modules and related equipment includes a generally U-shaped bracket adapted to receive an overvoltage protection device thereon and has a bracket insulati... | 04/16/1996 |
| 5391961 | Gas-filled discharge tube A flange, which is integrally formed with the inner surface of the cylindrical member, is located at an intermediate point between the end surface position of the cylindrical member to which the electrode plate of one of the discharge electrodes is sealed... | 02/21/1995 |
| 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 this connection, be sealed with a moisture-repelling subst... | 01/17/1995 |
| 5337035 | Discharge tube The discharge tube of this invention does not employ special shapes of electrodes that are difficult to manufacture, but can still provide a uniform electric field. The electrodes are disposed in the inwardly drawn portions of the cylindrical body in such... | 08/09/1994 |
| 5311164 | Surge absorber A MELF (Metal Electrode Face Bonding Device) surge absorbing element which can be connected across a pair of input lines of an electronic device. The surge absorbing element is secured in electrical contact with the input lines by a conductive heat releas... | 05/10/1994 |
| 5276422 | Surge absorber A surge absorber in which a thermal response switch is inserted in an input line at the input side of a surge absorbing element. The switch includes a conductive spring piece and a conductive hook piece. The base end of the conductive spring piece is fixe... | 01/04/1994 |
| 5248953 | Thermal overload protection device for electronic components A thermal overload protection device for electronic components, in particular for the telecommunication and data technology. The overload device has a spring-elastic shorting link 6 and a melt element 13. Tripping of the shorting link 6 performed in depen... | 09/28/1993 |
| 5243257 | Surge voltage protector A surge voltage protector having a tubular ceramic part as an insulator, and having metal electrodes soldered onto the end faces thereof. Each electrode is electrically connected in each case to an ignition aid applied at least to the inside wall of the c... | 09/07/1993 |
| 5231367 | Thermal response switch and a surge absorbing circuit using the same A surge absorbing element is parallel connected to an electronic device via a pair of communication lines. A normally closed thermal response switch is serially connected between the electronic device and the signal source on the input side of the surge a... | 07/27/1993 |
| 5191503 | Lightning surge protector A lightning surge protector, comprises a current limiting element in a pressure-proof housing. The pressure-proof housing is composed of a conductive material and coupled with an upper electrode member. Also, a self arc-extinguishing LSP comprises a curre... | 03/02/1993 |
| 5012383 | Lightning arrestor insulator and method of producing the same An excellent lightning arrestor insulator is provided having a discharge gap portion and an arrestor ZnO element device both built in a body of the insulator, comprising projected discharge electrodes arranged in the inside of the insulator body, the disc... | 04/30/1991 |
| 4962440 | Surge arrester A surge arrester comprises a plurality of cylindrical arrester elements (11) of metal oxide varistor material which are arranged, with confronting end surfaces, between two end electrodes (13) in an elongated protective housing (10) which is resistant to ... | 10/09/1990 |
| 4912589 | Surge suppression on AC power lines A triggered surge suppression network is disclosed comprising a low voltage clamping device, a crowbar device and a trigger device. The voltage clamping device and the trigger device are connected in parallel; and these devices are connected in series to ... | 03/27/1990 |
| 4907118 | Visual indicator electrical plug-type surge protector and systems An inexpensive, compact, portable, visual indicator electrical plug-type surge protector which comprises an electrical plug body composed of a molded transparent polymer, the plug body having an extended male grounding prong and a pair of male electrical ... | 03/06/1990 |
| 4890186 | Fault current limiting device In the past, a power fuse need be replaced after the current limiting operation and cannot be repeatedly used. To solve this problem, there has been proposed a permanent fuse or the like which uses an alkaline metal having a low melting point such as Hg, ... | 12/26/1989 |
| 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 of the protector by associated conductive elements projecti... | 10/24/1989 |
| 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 protection subassembly (42) of each protector assembly is connect... | 04/05/1988 |
| 4609902 | Arrester support and disconnector structure An arrester support and disconnector structure enclosed, in one embodiment, a cylindrical housing having a lower wall with a weakened zone. Electrically conductive members extend through the upper and lower walls of the housing and make electrical connect... | 09/02/1986 |
| 4288833 | Lightning arrestor A metal oxide varistor (MOV) is directly electrically connected between a line conductor and ground to dissipate the energy associated with voltage surges appearing on the line conductor. A thermostatic switch, in the form of a resilient arm held in elect... | 09/08/1981 |
| 4288832 | Two-section protection module for connecting blocks A protection module for connecting blocks is intended notably for at least one line wire of a telephone system and comprises a case having a ground terminal, an input terminal and an output terminal for each line wire, and a first lightning arrester havin... | 09/08/1981 |
| 4249224 | Surge voltage arrester with fail-safe feature A surge voltage arrester utilizes for surge protection a varistor of the zinc oxide type between a line terminal and a ground terminal. The varistor is of a type that has a resistance which decreases as increasing voltage is applied thereacross. With incr... | 02/03/1981 |
| 4168514 | Combination circuit breaker-lightning arrestor A conventional automatic electric circuit breaker is combined with a varistor to provide both overcurrent and overvoltage circuit protection. The varistor is connected between the load end of the circuit breaker and neutral to shunt to ground the currents... | 09/18/1979 |
| 4085397 | Electrical switching device for thermal and overvoltage protection A normally open temperature sensitive electrical switching device includes a heat fusible electrically conductive pellet which melts and provides an electrically conductive path through the switching device at a predetermined temperature level and, furthe... | 04/18/1978 |
| 4071872 | Interrupter A device for protecting electrical appliances from electrical surges having male prong members to connect the device to an electrical wall outlet; a female receptacle to receive a plug of the appliance; a self-restoring, current diverting spark gap means ... | 01/31/1978 |
| 4015228 | Surge absorber This invention provides a surge absorber for absorbing surges of electric current. The absorber has a metal oxide varistor hermetically sealed in a hollow insulator by a top and a lower electrical terminal and also has a conductive rod extending substanti... | 03/29/1977 |
