Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7598836 | Multilayer winding inductor A multilayer winding inductor. The inductor at least includes multi-level interconnect and single-level interconnect structures. The multi-level interconnect structure includes a plurality of conductive plugs and a plurality of looped conductive traces overlapping a... | 10/06/2009 |
| 7482903 | Electrical machine with part-winding circuit An electrical machine includes a first part-winding, a second part-winding, a core having slots in which the first and the second part-windings are wound, and a switching device for connecting the first part-winding to the second part-winding. In each of the slots, ... | 01/27/2009 |
| 7286036 | Method for selecting coil voltage and locking the coil in place A system for selecting coil voltage in an electrical device comprises a housing and a coil in the housing having a plurality of windings. Each winding has a pair of pins. A slider supports a plurality of moveable contacts and is moveably mounted in the housing proxi... | 10/23/2007 |
| 6953346 | Method and apparatus for high power switching A high power switching matrix constructed using stacked housings of common rows and common columns joined together by thimble sections. The switching assembly of the switching matrix is isolated from the housing using insulators provided with rotary bearings in whic... | 10/11/2005 |
| 6850141 | Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy... | 02/01/2005 |
| 6825747 | Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy... | 11/30/2004 |
| 6822545 | Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy... | 11/23/2004 |
| 6817087 | Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy... | 11/16/2004 |
| 6683508 | System and method of increasing a self-resonant frequency of a tuning circuit and an oscillator employing the same A segmented inductor for use with a tuning circuit, a method of increasing a self-resonant frequency of a tuning circuit and an oscillator employing the circuit and method. In one embodiment, the tuning circuit includes a first inductive element having a ... | 01/27/2004 |
| 6664881 | Efficient, low leakage inductance, multi-tap, RF transformer and method of making same A low leakage inductance, versatile RF transformer with multiple input/output voltage ratios. The transformer has many applications. For example, and not by way of limitation, the transformer can be used with switching power supplies, RF induction power s... | 12/16/2003 |
| 6657529 | Magnetic component The invention relates to a magnetic component having at least two windings electrically connected in series (3, 4, 13, 14, 24-27, 31-33) and a core (1, 2, 10, 11, 20-23, 30) on which the windings (3, 4, 13, 14, 24-27, 31-33) are arranged so that in the ev... | 12/02/2003 |
| 5883503 | Voltage compensation system A voltage compensation system for an A.C. power line supplying one or more air conditioners, a telephone system or other telecommunication system, a battery charger, or some other utilization system that should have an input voltage within a given normal ... | 03/16/1999 |
| 5805042 | Radio frequency low hum-modulation AC bypass coil A radio frequency choke for use in a cable television transmission and distribution circuit is disclosed. The radio frequency choke comprises a core of zinc-ferrite material as provided by MMG/NEOSID, Ltd., part number 31P0250012, and a wire coil wound ar... | 09/08/1998 |
| 5764127 | Inductive transmitters for conductor location Two vertical, parallel, horizontally spaced signal coils are connected in series but in opposite phase across an a.c. source. Thus a buried conductor located centrally beneath the coils experiences an alternating magnetic field whose strength is due to th... | 06/09/1998 |
| 5650726 | Emitter for an electromagnetic tomography measurement system which connects a greater number of windings to a magnetic core at low frequencies than at high frequencies aN emitter for a system of electromagnetic tomographic measurement, as well as a process and a generator (5) adapted to produce a variable frequency current supplying a solenoid (1), constituted of turns wound about a magnetic core (3). The solenoid (1) i... | 07/22/1997 |
| 4837497 | Variable transformer, reactor and method of their control A variable transformer, reactor having a core combining at least two complete core elements wiht a common yoke; primary winding divided into two independently fed sets of phase coils wound in opposite direction, arranged on symmetrical legs of core elemen... | 06/06/1989 |
| 4810991 | Encapsulated integral fuse block transformer An assembly which includes a transformer having a primary winding, a secondary winding, wires extending from the windings, a core at least partially disposed within the windings, a mounting flange, a housing surrounding at least a part of the windings and... | 03/07/1989 |
| 4678986 | Electric transformer with selectively energized modular circuits An electric transformer for supplying an adjustable electric magnitude, especially for regulating purposes, includes several modules having therebetween a binary progression relationship with respect to their power handling capabilities. Each module has a... | 07/07/1987 |
| 4644314 | Porcelain clad current transformer An expansion chamber 23 for a porcelain clad current transformer is formed by a base plate 231 secured on an insulating tube 22 housing a primary coil 21, and a unitary inverted cup-shaped envelope 232 removably mounted on the upper surface of the base pl... | 02/17/1987 |
| 4611190 | Apparatus for transforming multiphase power of different phase to phase line levels into multiphase power having a single phase to phase voltage level Three-phase power susceptible of having different line to line input voltages in the wye and delta configurations is converted into a three-phase wye output, each phase of which has the same line to line voltage for all of the predetermined input voltages... | 09/09/1986 |
| 4547721 | Transformer structure A transformer structure is provided having three cores of laminated magnet material positioned to define two transformer winding carriers. In the preferred embodiment, each core is a pair of C-shaped sections arranged in mouth-to-mouth relationship so as ... | 10/15/1985 |
| 4533892 | Split structure type transformer A split structure type transformer has a core upper and lower split-up secondary windings and a primary winding which are wound about the core, a single tap winding having a plurality of tap winding parts and a plurality of tap terminals, and a single tap... | 08/06/1985 |
| 4524341 | Transformer with series-parallel-series winding between split winding A transformer includes a core upon which a plurality of electrical conductors are concentrically disposed. The innermost and outermost electrical conductors are electrically connected to define a first winding, and the remaining electrical conductors are ... | 06/18/1985 |
| 4520818 | High dielectric output circuit for electrosurgical power source A transformer circuit including a primary coil with first and second voltage divider segments arranged in phase with equal inductances and a plurality of taps on the second segment. A switch is used to selectably ground one of the taps for varying the vol... | 06/04/1985 |
| 4471334 | On-load tap-changing transformer An on-load tap-changing transformer in which its high-voltage winding is axially divided into parallel-connected halves, and an end conductor constituting part of the high-voltage winding is connected to the other terminal of each of the halves. A coarse ... | 09/11/1984 |
| 4388510 | Heating collar with quadrafilar windings Apparatus for producing induction currents in a pipe to heat the same comprising an axially extending collar adapted to removably surround the pipe, the collar including at least two arcuate frames hingedly connected in end to end circumferential relation... | 06/14/1983 |
| 4325020 | Regulating transformer A regulating transformer including a base winding and a plurality of auxiliary windings adapted to be connected in whole, or in part, to said base winding. The ends of each auxiliary winding and a point between its ends are passed through a bushing to a c... | 04/13/1982 |
| 4255734 | Transformer with tapped subwindings A device for transformation of alternating current-voltage which includes a core, a primary winding subassembly and a second winding subassembly. One or both of the primary and second winding subassemblies consists of at least one pair of equal turn and a... | 03/10/1981 |
| 4160224 | Transformer A device for transformation of alternating current-voltage which includes a core, a primary winding subassembly and a secondary winding subassembly. One or both of the primary and secondary winding subassemblies consists of at least one pair of equal turn... | 07/03/1979 |
| 4023090 | Zagreb electrical circuit In an electrical three phase variable power supply fed by three phase alternating power and having a three coil adjustable autotransformer connected in wye across the power lines, the autotransformer having taps associated with each of its coils for adjus... | 05/10/1977 |
| 4001745 | Intrusion detection transducer A transducer including a central core extending along one axis and having a length along the axis defined as xl, where x is at least two and l is any given length. Surrounding the central core are a plurality of n wires, where n is an even integer of four... | 01/04/1977 |
