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7292423 |
Acoustic/underwater signaling device
The present invention is concerned with an underwater communication device, that is simple in design, in operation, powered solely from the hand against the resistance of a spring or elastic band,...
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6714398 |
Bulk degausser with fixed arrays of magnetic poles configured for thick and small form factor, high coercivity media
A bulk degaussing apparatus and method for erasing magnetic media of various sizes. A media passage track is provided such that media passing therethrough is uniformly exposed to the magnetic...
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6078485 |
Medium- and high-voltage gas-insulated circuit breaker with arc quenching means
A medium- and high-voltage gas-insulated circuit breaker with arc quenching capability, comprising an electrical contact which is provided with a fixed element and with a movable element which can...
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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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5504645 |
Arrangement with several surge arresters
An arrangement is described with several surge arresters arranged next to one another with their longitudinal axes substantially parallel. Each surge arrester is coupled to a common conductor rail...
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4962596 |
Sport shoe sole
Shoe sole equipped with studs 2 comprising a base 4 and a head 2. The base 4 is inserted into the sole and held in a position such that its lower surface 5 is kept flush with the walking surface 6...
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4710847 |
Current-limiting surge arrester disconnector
A protective device for use with a surge arrester to prevent fracturing of the porcelain body of a failed arrester includes a fast-operating switch which shunts a current-limiting fuse. The switch...
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4486805 |
Lightning arrester with improved spark gap structure
An improved arc gap structure for a lightning arrester comprises first and second annular electrodes concentrically arranged relative to one another. The first electrode has a generally cylindrical...
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4471402 |
Disconnector for surge arrester
A disconnector for a surge arrester explosively separates an electrical lead wire, normally a ground lead wire, from the arrester to prevent a permanent fault and to provide an indication of a...
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4356527 |
Valve arrester
A valve arrester comprises a serial arrangement which includes at least one nonlinear resistor and spark gaps implemented as arcing horns which are housed in slit-type arc extinction chambers whose...
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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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4204238 |
Surge voltage lightning arresters
A surge voltage lightning arrester ground lead disconnector utilizes a refractory metal coating on the explosive cartridge to provide a thermal delay to the arcing that occurs during disconnector...
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4191908 |
Current limiting spark gap for achieving arc elongation, division and compression without the use of supplementary magnetic means
A current limiting spark gap for use in a high voltage valve type lightning or surge arrester includes a plurality of insulating gap plates assembled together in a vertical stack to define a...
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4163272 |
Arrangement for arc-quenching in arresters
An electrical arrester structure includes an arc quenching chamber in which are located a pair of spaced principal electrodes between which a quenched arc gap is formed, an associated blow-out coil...
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4072996 |
Method and arrangement for arc quenching in arresters
An electrical arrester includes one or more pairs of electrodes disposed within quenching chambers which form current-limiting quenched spark gaps connected in series with an associated blow-out...
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3743884 |
OVERVOLTAGE PROTECTOR
Protection apparatus for a capacitive means which is effectively connected in series with a power transformer. A first spark gap and a resistance are serially interconnected and the combination is...
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3727090 |
DISCHARGE GAP STRUCTURE FOR LIGHTING ARRESTERS
Discharging gap structures are disclosed including two discharge electrodes disposed in divergently spaced, opposite relationship. End portions of the electrodes define a minimum gap size and each...
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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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3688155 |
REIGNITING SPARK GAP DEVICE INCLUDING A FLOW-THROUGH CHANNEL
A reigniting spark gap for surge diverters with magnetic blowing has electrodes arranged on an insulating base. Each electrode has a spark gap part arranged in an extinguishing chamber and the...
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3686532 |
APPARATUS FOR INCREASING THE ARC VOLTAGE IN RELATION TO THE PARTICULAR NUMBER OF SPARK GAPS WHICH DEFINE THE THRESHOLD CHARACTERISTICS IN MAGNETICALLY BLOWN SURGE ARRESTORS
A magnetically blown surge arrester is comprised of a plurality of superposed arc chambers each including a pair of spaced horns providing a sparkover gap. The horns of a lower chamber are provided...
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3678340 |
LIGHTNING ARRESTER AND GAP UNIT THEREFOR
A lightning arrester particularly adapted for extra high voltage AC systems and high voltage DC systems comprising a series of arc gap units and coil assemblies for moving the arcs outwardly. The...
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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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3670204 |
SPARK GAP SYSTEM FOR MAGNETICALLY QUENCHED SURGE VOLTAGE ARRESTER
A spark gap system for a surge voltage arrester of the magnetically quenched type is composed of a stack of superposed plates each of which is provided with a recess which defines an arc chamber...
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3668458 |
EXPLOSIVELY ACTUATED GROUND INTERRUPTING DEVICE
An explosively actuated ground interrupting device for a lightning arrester has an explosive charge which may be detonated by a resistor having a coil-shaped portion which presents a high impedance...
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3662223 |
PRE-AMPLIFIER PLUG FOR MUSICAL INSTRUMENTS WITH BATTERY RETAINING AND SWITCH ACTIVATING ROD MEANS
A plug with a self-contained solid state preamplifier primarily for musical instruments. This device includes resisters, capacitors and battery means, coupled to pre-amplify input signals to...
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3614536 |
SPARK GAP WITH MAGNETIC BLOWING OF THE ARC
A spark gap is formed between two discs of insulating material resistant to the arc and with a space therebetween. Two outer electrodes extend through the space between the discs from one side...
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3611045 |
LIGHTNING ARRESTER SPARKGAP ASSEMBLY HAVING OPPOSED ELECTROMAGNETIC FIELD-GENERATING MEANS FOR CONTROLLING ARC MOVEMENT
A current-limiting sparkgap assembly of the type that utilizes a magnetic field to stretch arcs in the discharge circuit of the assembly thereby forcing the arcs against cooling surfaces to...
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3611007 |
CURRENT LIMITING SPARK GAP ASSEMBLY HAVING ELECTROMAGNETIC MEANS FOR RETARDING ARC MOVEMENT THEREIN
A current limiting spark gap that is normally operative to quickly lengthen and extinguish arcs formed therein is provided with a unique arrangement of its adjacent respective pairs of horn gap...
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3579034 |
COMPRESSED GAS SYSTEM FOR ARC EXTINCTION
A capacitor bank protection system having series-connected spark gaps fired responsive to the firing of a precision spark gap connected in parallel with one of the series gaps. Each pair of spark...
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3577032 |
SERIES GAP LIGHTNING ARRESTER WITH ARC EXTINGUISHING CHAMBERS
This disclosure relates to an overvoltage spark gap protective apparatus having a series of arc gaps each within a spark gap chamber in combination with an outer coil to elongate the arcs. Each...
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3576470 |
DISCHARGING GAP DEVICE FOR A NAGNETIC BLOW-OUT ARRESTER
A discharging gap device for a magnetic blowout arrester comprising a partition plate separating an arc extinguishing chamber into upper and lower sections, a coil-shaped guide electrode extending...
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3566201 |
DISCHARGE ARC CONTROL MEANS FOR A LIGHTNING ARRESTER
A surge voltage arrester having means for retarding the build up of appreciable current limiting voltage therein for a predetermined interval of time after sparkover of the arrester comprising, a...
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3566197 |
OVERVOLTAGE PROTECTION DEVICE
An overvoltage protection device consists of a number of parallel connected columns containing nonlinear resistance stacks between upper and lower spark gap stacks. The spark gap stacks provide arc...
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3544847 |
FLIP-FLOP LIGHTNING ARRESTER WITH REDUCED PROTECTIVE LEVEL
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3543097 |
DIRECT CURRENT LIGHTNING ARRESTER WITH AUTOMATIC ARC QUENCHING MEANS
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3538388 |
VOLTAGE SURGE DIVERTER
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3538387 |
FLIP-FLOP LIGHTNING ARRESTER WITH IMPROVED MEANS FOR PREVENTING PARALLEL OPERATION
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3531690 |
VOLTAGE SURGE DIVERTER
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3531683 |
HIGH ENERGY PULSE SWITCH IN WHICH A SPIRAL MAGNETIC FIELD IS ESTABLISHED AROUND EACH POWER ELECTRODE
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3524099 |
SPARK GAP ASSEMBLY FOR LIGHTNING ARRESTERS
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3515947 |
INCLINED ARC CHAMBER FOR A SPARK GAP
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3513354 |
LIGHTNING ARRESTER WITH HIGH SURGE ENERGY ABSORBING CAPABILITY
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3504226 |
SPARK GAP ASSEMBLY FOR CURRENT LIMITING LIGHTNING ARRESTERS OR LIKE ARTICLES
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3489949 |
LIGHTNING ARRESTER WITH MAIN AND PREIONIZING GAPS
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3435287 |
DEIONIZATION OF A GAS DISCHARGE DEVICE BY VARYING THE TUBE PARAMETERS
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3393338 |
Surge suppressor for protecting a high voltage dc power circuit
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3378722 |
Series spark gaps arranged to produce a magnetic field
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3376458 |
Spark gap device
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3366822 |
Current reversal counting spark gap
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3363135 |
Magnetic drive lightning arrester having a variably spaced arcing gap
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