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7508644 |
Spark gap apparatus and method for electrostatic discharge protection
An apparatus for providing electrostatic discharge protection includes a plurality of conductive circumferential extensions defined by overlapping circular voids between a first conductor surface...
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6731490 |
Surge absorber and production method thereof
The invention relates to a surge absorber provided with; a surge absorber element composed of a columnar non-conductive member and a conductive film formed dividedly via a discharge gap on a...
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6678141 |
Electrical component with fault arc protection
The component with fault arc protection has an insulator in the form of a pillar, a first electrical conductor system which is provided on the insulator head and can be connected to high-voltage...
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6496350 |
Electrostatic wafer chucks and charged-particle-beam exposure apparatus comprising same
Electrostatic wafer chucks are disclosed for use in holding a substrate (e.g., semiconductor wafer) during processing of the substrate in a vacuum chamber or other reduced-pressure environment. A...
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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...
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5903427 |
Arc containing device
A device for containing an electrical discharge arc and holding the arc substantially captive until it is extinguished. The device comprises two spaced apart conductor systems (13 and 14) that are...
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5781393 |
Surge arrester
A surge arrester which includes a pair of spaced metal electrodes and a semiconductor element interposed between the metal electrodes and in contact with at least one of the metal electrodes. The...
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5708555 |
Surge arrester having controlled multiple current paths
An improved surge arrester includes metal oxide varistors in series with spark gap assemblies arranged such that the MOV elements conduct the low magnitude, steady-state current through the...
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5663864 |
Surge absorber
A discharge relay electrode is located between terminal electrodes of a gap-type surge absorber. In a microgap embodiment of the invention, a conducting film on a surface of an insulating tube is...
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5610570 |
Voltage non-linear resistor and fabricating method thereof
A non-linear resistor having a high impulse withstanding ability is obtained by directly applying a crystallized glass to the side surface of a sintered body of a ZnO element, and then...
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5515231 |
Thyristor valve arrester and DC power transmission thyristor valve using the same
An object of the present invention is to provide a thyristor valve arrester capable of measuring leakage currents of arrester elements in a simple construction and a DC power transmission thyristor...
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5436787 |
Surge arrestor unit
A three-terminal surge arrestor unit employs air gaps augmented with semiconductors to protect a circuit having two ungrounded conductors. Conductive electrodes and the semiconductors are mounted...
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5325259 |
Overvoltage protection for series capacitor equipment
An overvoltage protective device for a series capacitor (C) has a main spark gap and a first auxilary spark gap, arranged adjacent thereto, for ignition of the main spark gap. A second auxiliary...
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5107242 |
Voltage non-linear resistor for gapped lightning arrestors and method of producing the same
An excellent voltage non-linear resistor for use in a gapped lightning arrestor having a composition containing 1 0.5-1.2 mole % of bismuth oxide calculated as Bi 2 O 3 , 2 0.3-1.5 mole % of...
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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...
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4860156 |
Overvoltage protective circuit
A trigger circuit for a spark gap chain with at least two series-connected spark gaps, of which at least one is provided with at least one trigger electrode, includes a resistor chain which is...
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4797778 |
Gas discharge path
For switching high voltages, high frequencies and at high numbers of switching actuations, a gas discharge structure is provided which is composed of a series circuit of two or more individual...
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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...
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4720760 |
Electrical surge protection
A mains electrical plug incorporates a zinc oxide non-linear resistor device (10) in the form of a circular zinc oxide disc having three electrode portions (2) provided on one face and contacting...
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4686603 |
Overvoltage arrester
An overvoltage arrester having power connectors at its opposite ends is provided with an insulating housing that encloses a stack of coaxially arranged cylindrical varistors at least partially...
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4484247 |
Nonfragmenting station arrester
A lightning arrester of the station class is equipped with a ceramic housing protective heat shield liner formed of an ablative material capable of giving off a gas when subjected to a fault...
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4463404 |
Surge voltage arrester with shielding bodies enclosing a column of arrester elements
A surge voltage arrester, with a column of arrester elements arranged in a housing and several shielding bodies enclosing the column, includes voltage controlling elements arranged between the...
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4404614 |
Surge arrester having a non-fragmenting outer housing
A surge arrester including an outer elongated housing and an inner liner is disclosed herein. The outer housing is constructed of a material which will not break as a result of internal electrical...
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4369480 |
Overvoltage arrester including a column of arrester elements and shielding therefor
Disclosed is an overvoltage arrester in which the active part comprises a number of shielding elements with arrester elements fastened thereto in the interior thereof. The shielding elements along...
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4365282 |
Overvoltage protector using varistor initiated arc
Coaxial conductors are protected against electrical overvoltage by at least one element of non-electroded varistor material that adjoins each other varistor element and conductor with which it...
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4352139 |
Flexible connector for H.V. arrester
A gapless arrestor assembly for a high voltage bushing including an insulating elastomeric housing having a bore formed in one portion thereof and a receptacle formed in another portion thereof and...
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4320436 |
Secondary valve arrester
A secondary valve arrester for protection of secondary electrical systems, comprises a housing having a lid and base portion, the latter of which includes a plurality of compartments each of which...
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4282557 |
Surge voltage arrester housing having a fragible section
Surge voltage arresters are provided with a frangible housing to cause the housing to break at a predetermined section into a relatively few pieces upon varistor failure. The breaking of the...
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RE30490 |
Triggering circuit for spark gap assemblies
A plurality of series connected main spark gaps are connected in shunt circuit relation with a voltage grading impedance network which includes a trigger gap that is connected though frequency...
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4228478 |
Overvoltage arrester
An overvoltage arrester wherein the arrester comprises an insulating housing which encloses a body of cast resin in which is embedded a voltage dependent resistor and a first connecting device, a...
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4161763 |
Compact voltage surge arrester device
A compact voltage surge arrester employs a miniature series gap electrode arrangement in series with a plurality of zinc oxide varistors. The series gap arrangement provides the use of zinc oxide...
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4161012 |
High voltage protection apparatus
Arresters for protecting electrical equipment from damage or destruction due to overvoltage surges, for example overvoltage surges caused by lightning strokes, are provided that are fabricated or...
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4158872 |
Surge diverter
A surge diverter connected between a conductor and ground comprising several spark-quenching gaps, voltage-controlled shunting resistors connected in series with these gaps and voltage controlled...
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4134146 |
Surge arrester gap assembly
Surge arrester spark gap assemblies for use within surge voltage arrester devices employ the gap electrode structure to direct the arc current flow.
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4072998 |
Over-voltage protection device
In an over-voltage protection device which includes a plurality of stacks of series-connected, substantially identical surge arrester sections, each comprising an insulated casing containing a...
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4058848 |
Cut-off chamber of a lightning protector
Cut-off chamber of a lightning protector, characterized in that on the one hand, it comprises a wall made of a porous ceramic substance, ensuring the discharge and the cooling of the gases at the...
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4004193 |
Voltage surge arrester with capacitive grading and improved sparkover for fast impulses
The arrester includes a plurality of gap units and nonlinear resistance valve units connected in series between the line voltage and ground. A series line of capacitors across the gap units...
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3967160 |
Electrical overvoltage surge arrester with a long time constant valve section and series gap section
The arrester includes a valve section made up of high current-voltage characteristic exponent metal oxide varistor valve blocks having a relatively high capacitance and a series gap section made up...
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3959543 |
Non-linear resistance surge arrester disc collar and glass composition thereof
A zinc oxide compound non-linear resistance surge arrester disc is provided with a glass anti-flashover collar having a relatively low fusing temperature and a relatively low coefficient of thermal...
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3896352 |
Lightning arresters and surge diverters
Lightning arresters and surge diverters comprising a casing housing a plurality of series connected components arranged in two or more stacks, each component including non-linear resistors arranged...
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3869650 |
Disconnector
A disconnector for a surge arrester explosively separates an electrical lead, normally a ground lead, from the arrester to prevent a permanent fault on a circuit and to provide an indication of a...
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3859569 |
OVERVOLTAGE SURGE ARRESTER WITH IMPROVED VOLTAGE GRADING CIRCUIT
An overvoltage surge arrester for relatively high voltage applications is provided with a voltage grading circuit comprising a relatively low exponent resistor in parallel with a relatively high...
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3798505 |
LOW VOLTAGE SURGE ARRESTER
A secondary surge voltage arrester having a high impact resistant molded housing that is provided with supporting struts for mounting a sparkgap assembly in a desired, predetermined spaced...
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3715626 |
SPRING PLATE CONTACT AND SUPPORT FOR A LIGHTNING ARRESTER SPARKGAP ASSEMBLY AND ASSOCIATED GRADING RESISTORS
A lightning arrester having a self-supporting column of sparkgap assemblies and non-linear resistor valve elements, as well as a plurality of load-bearing grading resistors, is provided with a...
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3710212 |
DISCONNECTOR FOR SURGE ARRESTERS
A disconnector is attached to and electrically in series with a surge arrester. The disconnector has a breakable shell that is broken by explosion of a cartridge within the shell when excessive...
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3704388 |
SPARK GAP FOR SURGE DIVERTERS
A spark gap for surge diverters is composed of a plurality of plates of insulating material stacked one on the other with spaces there between. Electrodes are carried on each face of the plates....
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3702419 |
LIGHTNING ARRESTER WITH PRESSURE RELIEF MEANS
A lightning arrester with means for relieving internal pressure by venting the housing in case of failure of the arrester. The housing is closed at the end by a thin sealing plate and a piercing...
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3673459 |
TWO-WIRE PREIONIZER FOR SURGE VOLTAGE ARRESTERS
A preionizer for a surge voltage arrester, such as a lightening arrester, is formed by twisting the ends of a pair of wires, at least one of which is insulated except at its end, together so that...
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3671800 |
SELF-SUPPORTING LOAD BEARING VOLTAGE GRADING RESISTORS FOR A LIGHTNING ARRESTER
A lightning arrester characterized by having a plurality of self-supporting, semi-annular shaped voltage grading resistors that are adapted to support the weight of spark gap assemblies which are...
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3660725 |
OVERVOLTAGE ARRESTERS
In an overvoltage arrester with an enclosed spark gap assembly of electrode disks and intermediate spacers of annular shape, at least one electrode of a pair has an excentrically located projection...
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