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 |
| 7282845 | Spark plug having a plurality of center electrodes A spark plug according to the invention includes a tubular metal shell, a cylindrical insulator, a plurality of center electrodes, and a plurality of ground electrodes. The meal shell has an end portion in which a plurality of thick-walled portions and a plurality o... | 10/16/2007 |
| 7140359 | Spark plug capable of removing remaining electric charges A spark plug capable of removing the remaining electric charges is proposed. The spark plug can be installed in a vehicle and has an insulating body, a center electrode, a conductive housing and a conductive wire. The center electrode is passed through the insulatin... | 11/28/2006 |
| 6509676 | Spark plug construction for enhanced heat transfer A spark plug having enhanced heat transfer capabilities is provided. The spark plug comprises a tubular insulator body, a center electrode and a thermally conductive filler material. The tubular insulator body has an inner surface, and the center electrod... | 01/21/2003 |
| 5955827 | Spark plug with replaceable ground electrode An internal combustion engine spark plug having an inside annular groove at the end of its shell that accommodates a replaceable ground electrode that consists of a circular wire of durable metal that fits the annular groove and having ends that are pre-f... | 09/21/1999 |
| 5791320 | Engine ignition system An engine ignition system includes spark plugs having two high voltage electrodes connected to separate high voltage sources. Should one voltage source fail, the engine will continue to fire with sparks generated by the other high voltage source. The inve... | 08/11/1998 |
| 5469013 | Large discharge-volume, silent discharge spark plug A large discharge-volume spark plug for providing self-limiting microdischarges. The apparatus includes a generally spark plug-shaped arrangement of a pair of electrodes, where either of the two coaxial electrodes is substantially shielded by a dielectric... | 11/21/1995 |
| 5449966 | Double sliding spark plug - thunder II A Double Sliding Spark Plug as a Volume Ignition System for Internal Combustion Engines causes ignition processes of the air-fuel mixture by two simultaneously conical or cylindrical sliding discharges between a conical or cylindrical high voltage electro... | 09/12/1995 |
| 4921090 | Vibratory conveyor A drive and drive controller for a vibratory conveyor, wherein the drive comprises a pair of pole pieces offset along a direction of action of the drive, and moveable in the direction of action of the drive when energized by a power signal. Preferably, on... | 05/01/1990 |
| 4639635 | Spark plug The invention relates to a spark plug (1) comprising at least two insulated electrodes (5) and (6), an earthed electrode (7) and a chamber (4) so arranged with respect to one another that when a voltage is applied arcs are struck in series between electro... | 01/27/1987 |
| 4527085 | High voltage spark electrode structure With the addition of a conductive means in the form of a grounded ring or member placed at the insulator means of a high voltage spark electrode structure, the required break down voltage of the spark gap can be reduced. The conductive means typically wou... | 07/02/1985 |
