Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7327133 | Current measuring device using hall sensors The present invention provides a current measuring device including a probe body having an elongated portion extending outward to a hook-shaped end wherein the hook-shaped end useful for isolating a conductor under test, a U-shaped magnetic core positioned upside do... | 02/05/2008 |
| 7312686 | Split core sensing transformer Separable toroidal segments reduce the size of a sensing transformer that can be installed on an electrical conductor while connected to a device. ... | 12/25/2007 |
| 7192319 | Insulated cable termination assembly and method of fabrication A cable termination assembly includes a ring terminal with mechanically coupled insulating assembly electrically isolating a terminal post from the ring terminal. Methods of fabricating the assembly are also described. ... | 03/20/2007 |
| 7180248 | Inductively coupled ballast circuit A ballast circuit is disclosed for inductively providing power to a load. The ballast circuit includes an oscillator, a driver, a switching circuit, a resonant tank circuit and a current sensing circuit. The current sensing circuit provides a current feedback signal... | 02/20/2007 |
| 7015783 | Coil component and method of manufacturing the same A coil component includes a coil 2 having a through-hole 1, a magnetic core encapsulating the coil, and a terminal 4. The magnetic core includes a top portion 11 disposed at an upper part of the coil, a bottom portion 12 disposed a... | 03/21/2006 |
| 6926544 | Flash memory apparatus having single body type rotary cover A flash memory apparatus having a single body type rotary cover, wherein a cover is not completely separated from a main body so that loss of the cover is prevented. The flash memory apparatus includes: a flash memory main body including a rectangular shaped case wi... | 08/09/2005 |
| 6717085 | Press-button switch A press-button switch is provided which includes a control unit between a press button and a conductive switching element within a housing of the press-button switch. The control unit utilizes a push element and a hook member beneath the press button to push and pul... | 04/06/2004 |
| 6650218 | Inverter transformer An inverter transformer is formed of first and second cores arranged to face each other to form a closed magnetic circuit. The first core has a central leg, an outer perimeter wall, and a partition between the central leg and the outer perimeter wall so t... | 11/18/2003 |
| 5909100 | Charging connector for electric vehicle Groups of magnets are respectively provided on the joint surfaces of a vehicle-side connector and a power-supply-side connector in such a way that the N and S poles of a plurality of permanent magnets are alternately arranged in a circle. When charging is... | 06/01/1999 |
| 5852394 | Electromagnetic coupling device for charging an electric motor vehicle An electromagnetic coupling device for charging an electric motor vehicle is provided which is easy for handling a charging coupler and hardly lowers electric power transmission efficiency for a long period of time. A charging coupler (10) containing a pr... | 12/22/1998 |
| 5703461 | Inductive coupler for electric vehicle charger An inductive coupler for use in a battery charging system for an electric vehicle has a primary device having a primary coil and a core and a secondary device having a secondary coil and core. The primary and secondary devices are coupleable together with... | 12/30/1997 |
| 5216402 | Separable inductive coupler A separable inductive coupler for transferring electrical power across a dielectric medium using magnetic induction. Its coil geometry allows for easy disassembly of primary and secondary circuits. When primary and secondary coils are mated, an extremely ... | 06/01/1993 |
| 4325361 | Deep heating electrode The present invention discloses an improved electrode for use with apparatus employing radio frequency energy for deep heating of materials. In particular, it is adapted for the medical treatment of living animal tissue by hyperthermia. The electrode comp... | 04/20/1982 |
| 4240445 | Electromagnetic energy coupler/receiver apparatus and method An apparatus and method for coupling electromagnetic energy into a dielectric material such as tissue while substantially reducing external leakage of the energy. The apparatus may also be used as a receiver for electromagnetic energy transmitted through ... | 12/23/1980 |
