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7193495 Magnetically influenced current or voltage regulator and a magnetically influenced converter  
A magnetically influenced current or voltage regulator includes a body of an anistropic magnetisable material that provides a closed, magnetic circuit. A first electrical conductor is wound around...
7180396 Superconducting current limiting device with magnetic field assisted quenching  
The present invention relates to a superconducting current limiting device comprising a superconductor component ( 1 ) wherein each superconductor component ( 1 ) comprises a superconductor body (...
6547596 Filtered electrical connector with ferrite member and coil  
The design of the present invention compiles EMI protection of two formerly separated filtering devices (coil and ferrite beads) in one optimal packaging. It consists of a coil wound around a...
6437675 Linear coil acoustic noise inhibiting  
A linear coil for inhibiting acoustic noise is provided. A rubber spacer is disposed in addition to the conventional linear coil. By means of the spacer, the vibration, generated when the...
6177855 Transformers having closed ferrite magnetic circuits  
A transformer, comprising: a closed ferrite magnetic circuit having an air gap; a rigid component filling a portion of the air gap; and, a flexible material filling the remainder of the air gap to...
6114934 Variable linearity coil  
A variable linearity coil has a coil which is wound around a first core, a permanent magnet for charging a bias magnetic field to the first core, a bias magnetic field adjusting coil which is wound...
6087917 Power magnetic device and method of manufacture therefor  
A package for an electronic device, the electronic device including a body having a cavity therein, the body subject to stress from imposition of forces. The package includes a conforming...
6028500 Audible noise suppressor for planar magnetic devices  
The audible noise suppressor for planar magnetic devices functions to eliminate the audible noise generated by the normal operation of a planar magnetic device. This is accomplished by the use of a...
5939965 Inductive component with variable magnetic performance  
An inductive component with variable magnetic properties. A magnetic field is inductively generated in a magnetic core by an electrical winding. Electrode coatings are provided on the magnetic core...
5815059 Coaxial isolation mounting of a toroidal transformer  
A toroidal shaped transformer having two levels of structureborne noise isolation is disclosed. A 30-60 dB reduction in noise is achieved by isolation mounting the toroidal transformers coaxially...
5726617 Electrical transformer with reduced core noise  
An electrical transformer includes a tank containing transformer fluid and a transformer core and winding subassembly located in the transformer fluid within the tank. The electrical transformer...
5710533 Electrical transformer with reduced fan noise  
An electrical transformer includes a housing, a transformer core and winding subassembly located in the housing, and a cooling fan subassembly. The cooling fan subassembly includes a variable speed...
5682292 Liquid-cooled valve reactor  
The invention relates to a liquid-cooled valve reactor, in particular for a high-voltage DC transmission installation, including a reactor core (2) and a reactor coil (4), the reactor coil (4)...
5619174 Noise filter comprising a soft magnetic alloy ribbon core  
A noise filter includes an annular magnetic core made of a soft magnetic alloy ribbon mainly made of Fe and containing B and at least one element selected from a group consisting of Ti, Zr, Hf, Nb,...
5566047 Electrical apparatus with noise-suppressing feature  
Disclosed is an AC electrical apparatus including a vibrating device and a mounting structure supporting the device. In the improvement, a resilient insulator is interposed between the device and...
5184104 Electromagnetic induction apparatus with a sound suppressing arrangement  
An electromagnetic induction apparatus includes a tank having a bottom plate and containing an electrical device which vibrates during operation. The tank is supported by supporting members...
5072158 Silent lamp igniter  
The present invention comprises a transformer having a magnetic core that is smaller and shorter than the winding form for the primary and secondary coils, the core is surrounded by an sound...
5025241 Transformer of ferrite closed magnetic circuit type  
The present invention concerns a transformer of the ferrite closed magnetic circuit type, with a gap. The gap is filled with a mastic such as the polysulphide or polyurethane mastics having a Shore...
4859977 Insulator device for power transformer  
An insulator device to be inserted between a power transformer and a conductive chassis. Insulative washers are monolithically formed with the spacer. One washer is formed for each screw holding...
4849728 Induction generator  
The invention provides an iduction generator comprising a plastic injection-molded housing having a port and one or more pole shoe(s) associated with a permanent magnet. A plastic bobbin inserted...
4800306 Device for damping the oscillations of a stepping motor  
The device comprises an external inertia element which is fixed to a damping member which is coaxially fixed with respect to a shaft of a stepping motor, in such a way that it can rotate together...
4724413 Low-noise transformer  
A low-noise transformer, particularly for the use as an output transformer of an inverter, comprising a sound-proof envelope surrounding at least one of the windings for absorbing or screening...
4639672 Nuclear magnetic resonance apparatus  
Inside the gradient coils in the magnet system of a nuclear magnetic resonance apparatus there is arranged a sleeve which forms a noise-absorbing shield between the gradient coils and the...
4558296 Sound damping devices  
A hollow sound damping plate is arranged between a transformer core and an internal limiting surface of a transformer tank filled with insulating fluid. At least one compressive-force transmitting...
4514714 Noise-reduction device for stationary induction apparatus  
A noise-reduction device for a stationary induction apparatus which device comprises a sound insulation panel attached to reinforcing channels provided at the periphery of a tank of the stationary...
4497387 Transformer with smooth-walled tank  
Transformer having an active part thereof disposed in an oil-filled, smooth-walled tank having side walls braced by ribs secured by welding and subdivided into wall-high panels, the panels,...
4464644 Procelain-clad electrical machine with vibration-on-transportation suppression  
A transformer is fixed between two electrically insulating plates extending through a hollow porcelain tube connected at both ends to an upper and a lower tank through packings respectively and two...
4460884 Transformer comprising a magnetic screen  
A transformer including a lamination core of band iron and a magnetic screen which consists of a wound iron band arranged around the lamination core (5) and which is secured to the core by means of...
4456900 High frequency coil  
A high frequency coil including an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on a peripheral surface of the core; a...
4449110 Device for chocking an inverted type current transformer when transported on its side  
A device for chocking an inverted type current transformer when transported on its side. It comprises at least one jack (12) within the metal enclosure (1) but operable from outside the latter and...
4442419 Static induction apparatus  
A static induction apparatus including a vessel for containing a main body of the static induction apparatus, a plurality of reinforcing support members secured to side plates of the vessel and a...
4419647 Liquid-cooled transformer for large power ratings  
Liquid-cooled transformer for large power ratings, including a tank having a bottom with cutouts formed therein, large-area base plates resting on the bottom of the tank, an active part having ends...
4390858 Liquid-cooled transformer for large power ratings  
Liquid-cooled transformer for large power ratings, including a tank having a bottom, large-area base plates resting on the tank bottom, an active part and a pressure device fastened to the base...
4373608 Tuned sound barriers  
A tuned sound barrier for machines which radiate sound primarily at a few constant, discrete frequencies includes an array of mechanical resonators distributed over the surface of a sound barrier....
4325096 Zero-phase current transformer  
A zero-phase current transformer for use as a leakage current detecting element in a leakage current interrupter in which two magnetic materials of different permeabilities are provided so as to...
4318068 Induction device equipped with vibration suppressor  
A plurality of rod-like vibration elements are fixed onto the outer circumferential surface of the exterior wall of the tank of a transformer. Each rod-like vibration element consists of a beam...
4306209 Sound-proofed choke  
A choke for use with alternating current has a ventilated housing with a perforate inner wall and an imperforate outer wall to which the choke is connected vibration-elastically. The space between...
4215763 Resonant sound attenuator for transformers  
A sound attenuator for transformers comprises a rigid plate fixedly attached to a resilient mass. The sound attenuator is attached to the transformer outer wall in the vicinity of highest sound...
4146112 Sound reducing baffle for electrical apparatus  
A sound reducing baffle for air cooled electrical apparatus with a ventilated enclosure comprised of a box-like closure member positioned in front of the ventilating openings and open at the back...
4137471 Stator winding structure for gap winding type electric rotary machine  
In a gap winding type electric rotary machine, a stator winding consisting of a plurality of stator coils is mounted on the inner surface of a stator core within the air gap defined by the...
4100521 Iron core for induction apparatuses  
An iron core for induction apparatuses is constructed of at least one main leg and yokes including side yokes comprising laminations of magnetic material. The magnetostriction of the yokes is...
4082141 Ballast vibration isolation system with thermal path  
A ballast can be mechanically and thermally isolated from the mounting plate which acts as a heat sink by securing a pair of L-shaped channels to the bottom of the ballast with the depending leg of...
4055826 Resiliently supported windings in an electrical reactor  
A reactor winding in the form of a high current, multi-turn, multi-layer insulated coil stack embracing an inner member of a magnetizable core assembly of a reactor is resiliently supported by the...
4047138 Power inductor and transformer with low acoustic noise air gap  
A ferrite magnetic core includes a one-piece rectangular outer member with aligned circular apertures in which the ends of a cylindrical center member are retained to thus establish a radial air...
4019167 Encapsulated transformer  
An encapsulated transformer in which the coil and core assembly of the transformer is encapsulated within a jacket of non-flexible epoxy resin, and a cushion of closed-cell foam rubber lies between...
4000406 Light fixture  
There is disclosed a light fixture having a ballast therein comprising a substantially enclosed steel case which is mounted on a wall of the steel housing of the fixture and substantially filled...
3815068 STATIONARY INDUCTION APPARATUS  
A stationary induction apparatus having a plurality of windings concentrically disposed around a leg portion of an iron core. In the apparatus, the distribution of ampere-turns in the axial...
3815067 CHOKES OR REACTORS  
A choke or reactor has laminations which define a U-shaped structure having two outer limbs and a base. Further laminations define a central limb connected at one end to the base and surrounded by...
3792397 STATIONARY INDUCTION APPARATUS HAVING SOUND ATTENUATING CORE CLAMPING MEANS  
A shunt reactor has adjustable, spring-loaded jackscrew core clamping means which attenuate vibratory forces transmitted from the magnetic core to the tank walls and permit adjustment of core...
3760315 ELECTRICAL COIL WITH SPACING BANDS  
An electrical impedance coil which has a helical configuration has applied to the outer surface thereof a plurality of circumferentially spaced bands of insulating material and which extend...
Matches 1 - 50 out of 108 1 2 3 >