Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7362206 | Variable transformer A variable transformer has an effective turns ratio that can be varied by electronic switching. By varying the effective turns ratio, the output voltage can be controlled precisely for a varying input voltage and load regulation. The variable transformer is a modula... | 04/22/2008 |
| 7327207 | Lamination type electronic component A lamination type electronic component includes spiral conductor patterns which are substantially quadrilateral and are electrically connected to each other through a via hole formed in a ceramic insulating layer so as to constitute a coil. The conductor patterns ar... | 02/05/2008 |
| 7304867 | DC-DC converter of multi-output type A DC-DC converter of multi-output type is provided wherein a primary winding 5a is wound around core halves 5g, 5h of a transformer 5 between first and second secondary windings 5b, 5c of t... | 12/04/2007 |
| 7205875 | Hybrid air/magnetic core inductor An inductor includes an elongate magnetic core, a coil wrapped around the core and a spacer that separates the coil from the core to provide a coolant passage between the coil and the core. The coolant passage may include an air passage that extends substantially pa... | 04/17/2007 |
| 7171739 | Method of manufacturing an on-chip transformer balun A method of manufacturing an on-chip transformer balun includes creating, on a semiconductor substrate, a primary winding having at least one substantially symmetrical primary turn on a first dielectric layer and at least one metal bridge on a second layer. A second... | 02/06/2007 |
| 7154364 | Electrical machine An electric machine comprises a core (10) of magnetic material and a first insulating layer (14) of a solid electrically insulating material surrounding the core. A high-voltage winding (17) in the form of an electric conductor is wound around a... | 12/26/2006 |
| 7098764 | Main conductor for a capacitively controlled high-voltage winding In a main conductor for a capacitively controlled high-voltage winding composed of pancake coils for transformers, in which the main conductor for the load current is realized as a twisted conductor, and in which a control conductor is provided which is spatially ar... | 08/29/2006 |
| 7026903 | Filtering induction device A filtering induction device is provided to improve the filter effect via the increase of an insertion loss resulting from stray capacitance. The induction device includes at least one core structure, and first and second flat coils that interlacing with each other.... | 04/11/2006 |
| 7023315 | High performance RF inductors and transformers using bonding technique A method of fabricating an inductor using bonding techniques in the manufacture of integrated circuits is described. Bonding pads are provided over a semiconductor substrate. Input/output connections are made to at least two of the bonding pads. A plurality of wire ... | 04/04/2006 |
| 7009486 | Low noise power transformer A printed circuit board transformer has primary and secondary windings. The transformer includes a printed circuit board having a plurality of traces forming a plurality of first portions of the primary and secondary windings, an annular magnetic core adjacent to th... | 03/07/2006 |
| 6998952 | Inductive device including bond wires An inductive device (105) is formed above a substrate (225) having a conductive coil formed around a core (109). The coil comprises segments formed from a first plurality of bond wires (113) and a second plurality of bond wires (111 | 02/14/2006 |
| 6998953 | High performance RF inductors and transformers using bonding technique A method of fabricating an inductor using bonding techniques in the manufacture of integrated circuits is described. Bonding pads are provided over a semiconductor substrate. Input/output connections are made to at least two of the bonding pads. A plurality of wire ... | 02/14/2006 |
| 6954131 | Electrical reactor assembly having center taps An electrical reactor assembly and method of assembly is disclosed. The reactor is formed from a combination of a magnetic T-core and a pair of magnetic L-cores. A plurality of comb-like separators is placed over a vertical portion of the T-core. A wire, with a rect... | 10/11/2005 |
| 6949065 | Left ventricular assist system A fully implantable left ventricular assist system comprising a pumping means connectable via adapter elements to the ventricle includes two compressible chambers in the form of sacs (5, 5′) and a compressing means (4) to alternatingly fill and disch... | 09/27/2005 |
| 6867674 | Transformer A power transformer having at least one high voltage winding and one low voltage winding. Each of the windings includes at least one current-carrying conductor, a first layer having semiconducting properties provided around said conductor, a solid insulating layer p... | 03/15/2005 |
| 6853284 | High-voltage transformer A high-voltage transformer includes a bobbin that holds a core at its center. This bobbin has eight winding grooves arrayed along the central axis of the core. A primary coil is wound around each of two outermost winding grooves with a predetermined number of turns.... | 02/08/2005 |
| 6751847 | Laser-assisted fabrication of NMR resonators A detection coil for use in nuclear resonance magnetic (NMR) spectroscopy and a method of manufacture thereof. At least two film layers of material are deposited on an outer surface of a cylindrical tube of dielectric material. The layers are patterned to form a sol... | 06/22/2004 |
| 6683523 | Laminated impedance device In a laminated impedance device, coil conductor patterns are electrically connected in series through via-holes to form a substantially U-shaped spiral coil. A first group of the coil conductor patterns defines a first coil portion of a high-permeability ... | 01/27/2004 |
| 6661187 | Fly back transformer A fly back transformer comprises a horizontal output section; a low-voltage bobbin forming a first coil; a high-voltage bobbin forming a second coil having high-voltage coil layers and high-voltage rectifier diodes connected in series between upper termin... | 12/09/2003 |
| 6633220 | Coil apparatus and manufacturing method for the same To prevent a substrate for mounting electronic components from being damaged when cores are rubbed together during assembly, a pair of core members sandwich a part of a coil pattern formed on the substrate from the top and bottom sides of the substrate, a... | 10/14/2003 |
| 6617949 | Choke coil A choke coil has small difference of wire wound resistances between coils to obtain sufficient unbalance attenuation amount, superior in workability in winding and reduced leakage inductance and line capacity. The choke coil includes first and second coil... | 09/09/2003 |
| 6498553 | Laminated type inductor A small-sized laminated inductor made via a simple firing process includes insulating magnetic sheets made of high permeability materials in which first coil conductors are provided on the surfaces thereof, insulating magnetic sheets made of low permeabil... | 12/24/2002 |
| 6414291 | Transformer for a microwave oven A transformer for a microwave oven capable of preventing quality deterioration thereof due to damaged insulating paper, includes a first core having a coil inserting section having one open side; a plurality of coils sequentially inserted into the coil in... | 07/02/2002 |
| 6377153 | Transformer apparatus for use in insulated switching power supply apparatus with reduction of switching noise A transformer apparatus which can reduce a switching noise current flowing between a primary side ground and a secondary side ground is provided. The transformer apparatus includes a first core having a first primary winding wound around the first core, a... | 04/23/2002 |
| 6160467 | Transformer with center tap In one embodiment of the present invention, a transformer includes a first secondary winding made of stamped and bent metal. This first secondary winding has a coil portion with substantially closed cross section. The transformer also includes a primary w... | 12/12/2000 |
| 6075431 | Converter transformer A transformer has a bobbin made of a resin material having flanges (2a to 2f) formed thereon, at least three chambers defined between the adjacent flanges. A primary auxiliary winding (P2), which supplies an electric power to an drive-control and overvolt... | 06/13/2000 |
| 6046662 | Low profile surface mount transformer A transformer is provided that consists of a primary winding, a secondary winding and a magnetic core. The primary winding is wound directly around the magnetic core, thereby removing the need for a bobbin. By removing the need for the bobbin, the transfo... | 04/04/2000 |
| 5999078 | Transformer and rectifier module with half-turn secondary windings A transform-rectifier module has a one-half turn secondary winding installed with very short, direct connections to four rectifiers. The core of the transformer has two parallel through holes. The secondary winding comprises two "Y" shaped windings. The "... | 12/07/1999 |
| 5917396 | Wideband audio output transformer with high frequency balanced winding A wideband audio output transformer for use with a push-pull vacuum tube amplifier using a multifilar ribbon in which primary windings and secondary windings coexist. The multifilar ribbon is wound continuously around a common core side by side to form su... | 06/29/1999 |
| 5886610 | Ultra flat magnetic device for electronic circuits The low-profile magnetic device comprises at least one winding formed by a plurality of conductive metal laminations (9) of substantially annular layout, superposed and electrically insulated from each other and with respect to the ferromagnetic core and ... | 03/23/1999 |
| 5877667 | On-chip transformers Various embodiments of on chip-transformers constructed in separate metal layers in an insulator that serves as a dielectric which is formed on a substrate such as a silicon substrate. Windings with currents flowing in a first direction are constructed in... | 03/02/1999 |
| 5798681 | Garage door position indicator The garage door position indicator contains a radio frequency (RF) transmitter with an electronic angle sensor attached onto a garage door, and a RF receiver with a visual/audio indicator. The electronic angle sensor supplies signals to the RF transmitter... | 08/25/1998 |
| 5781093 | Planar transformer A planar winding assembly includes first and second windings, each winding having an axis and a pair of insulative sheet layers, laminated together, with at least one of each of the pairs of insulative sheets having a hole. Each winding further includes a... | 07/14/1998 |
| 5719547 | Transformer with bifilar winding A transformer which has a core, a wire for a primary coil and two wires for a secondary coil. The wire for a primary coil and one of the wires for a secondary coil are wound around a body of the core together, that is, are bifilar-wound. The other wire fo... | 02/17/1998 |
| 5716713 | Stacked planar transformer A process for preparing an insulated metallized substrate, wherein a specified metallized substrate is heated from ambient temperature to a peak temperature of at least about 800 degrees centigrade while contacting the substrate with an inert atmosphere c... | 02/10/1998 |
| 5694104 | Low profile high power surface mount transformer A low profile transformer comprises a support member for supporting a coil winding, a first elongated conductive tape forming at least one conductor having lead terminals formed integral therewith formed into a first coil of multiple turns, a second elong... | 12/02/1997 |
| 5660756 | High-voltage transformer for a microwave oven power supply In a high-voltage transformer for the power supply of a magnetron in a microwave oven, of the type comprising a primary coil, a high-voltage secondary coil and a heater secondary coil, the two secondary coils are superimposed by being wound on a casing th... | 08/26/1997 |
| 5635892 | High Q integrated inductor An inductive structure is provided which displays an increased self-inductance and improved Q at high frequencies. The improvement resides in the disposition proximate the inductive structure an amount of magnetic material to increase mutual inductance be... | 06/03/1997 |
| 5579887 | Coin detection apparatus A differential type sensing unit which includes a winding core having a winding shaft is described. In one embodiment, a post extends from the winding shaft and is located intermediate first and second winding ends of the winding shaft. The post facilitat... | 12/03/1996 |
| 5570074 | Very low leakage inductance, single-laminate transformer A transformer having a very low, predetermined leakage inductance includes an elongate dielectric laminate having two surfaces. A primary winding having a pattern conformal to the configuration of the laminate is disposed on one surface and extends substa... | 10/29/1996 |
