William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Application No. | Application Title | Issue Date |
| 20110204725 | ELECTROMAGNETIC CIRCUIT INTERRUPTER In one aspect, the present invention provides an electromagnetic circuit interrupter for use in a high voltage direct current (DC) aircraft power distribution system. The electromagnetic circuit interrupter comprises a contact mechanism operable to separate first and se... | 08/25/2011 |
| 20100207713 | Electromagnetic relay An electromagnetic relay includes a coil, a movable member, first and second fixed contact supports each having first and second fixed contacts, and a movable body having first and second movable contacts. A third fixed contact is arranged on the second fixed contact su... | 08/19/2010 |
| 20100066471 | Electromagnetic relay An electromagnetic relay includes a housing having an accommodating space therein, a magnet coil in the accommodating space to generate electromagnetic force when energized, a moving contact disposed in the accommodating space and driven by the coil, a fixed contact in ... | 03/18/2010 |
| 20100026429 | Switching Device, High Power Supply System and Methods for Switching High Power Embodiments of the invention relate to a switching device, a high power supply system and methods for switching high power including a relay and a power semiconductor switch arranged in parallel to the relay.... | 02/04/2010 |
| 20090315654 | Switching Device, Use Thereof And A Method For Switching A device for switching in and out a load with respect to an alternating voltage feeder has two mechanical switches connected in series in a current path between the load and the feeder and each having a by-pass branch with at least one member with ability to block curre... | 12/24/2009 |
| 20090284335 | ELECTROMAGNETIC SWITCH AND MAKING METHOD THEREOF The present invention provides a low-noise electromagnetic switch applied to an electric car, whereby noise generated by vibration from an inner switch is prevented from being transmitted to the outside box by filling up a filler-up material between the inner switch and... | 11/19/2009 |
| 20090102585 | Contactor Assembly With Arc Steering System A contactor assembly includes a stationary contact, an arc contact, an arc arrestor, and a magnetic intensifier. The magnetic intensifier is constructed to extend in generally close proximity to one of the stationary contact and the arc contact. During communication of ... | 04/23/2009 |
| 20090072935 | Relay A relay is disclosed that includes a first opening and closing part including an openable and closeable first gap; a second opening and closing part including an openable and closeable second gap, the second opening and closing part being placed side by side with the fi... | 03/19/2009 |
| 20080191819 | SLOT MOTOR HOUSING AND CIRCUIT INTERRUPTER INCLUDING THE SAME A circuit breaker includes a housing, separable contacts, an operating mechanism structured to open and close the separable contacts, a power conductor including a first conductor and a second reverse loop conductor, the second reverse loop conductor carrying one of the... | 08/14/2008 |
| 20080143462 | High voltage DC contactor hybrid without a DC arc break An apparatus, and a method of opening and closing electrical power feed lines using a hybrid contactor, which combines a traditional set of mechanical main contacts with a high voltage solid state switch. The solid state switch provides a parallel current path around th... | 06/19/2008 |
| 20080079519 | ELECTRICAL SWITCHING APPARATUS INCLUDING A SPLIT CORE SLOT MOTOR AND METHOD OF INSTALLING A SLOT MOTOR ASSEMBLY IN A CIRCUIT INTERRUPTER A circuit breaker includes a housing, separable contacts, an operating mechanism structured to open and close the separable contacts, a power conductor comprising a first conductor and a second reverse loop conductor, the second reverse loop conductor carrying one of th... | 04/03/2008 |
| 20080074216 | Contactor assembly with arc steering system A contactor assembly includes a stationary contact, an arc contact, an arc arrestor, and a magnetic intensifier. The magnetic intensifier is constructed to be secured in generally close proximity to the stationary contact. During communication of power through the conta... | 03/27/2008 |
| 20080030289 | Contactor for direct current and alternating current operation The invention relates to a contactor for direct current and alternating current operation with at least one contact point with a fixed contact and a movable contact, at least one permanent magnet, arranged adjacent to the contact point, for the generation of a permanent... | 02/07/2008 |
| 20070268100 | Electrical switching apparatus, and movable contact assembly and shield therefor A shield is provided for a circuit breaker including a housing, a movable contact, a stationary contact, and an operating mechanism for moving the movable contact into and out of electrical contact with the stationary contact. The operating mechanism includes a crossbar... | 11/22/2007 |
| 20070210885 | Circuit breaker A circuit breaker for a double-break mechanism includes a current interrupting section having a contact mechanism. The contact mechanism includes first and second fixed contactors arranged in parallel and having fixed contacts, and a bridging movable contactor having an... | 09/13/2007 |
| 20070139147 | Circuit breaker A circuit breaker is comprised of a make-and-break mechanism part disposed between frame plates opposite to each other; a base in which a breaking portion including cross bar, moving contact, fixed contact and arc-extinguishing device, and an over-current trip device ar... | 06/21/2007 |
| 20060279385 | Gas-blast circuit breaker The gas-blast circuit breaker includes an electrically conductive vessel charged with insulating gases and kept at earth potential, a stationary arc-extinguishing chamber accommodated in a ground metal tank and corresponding to a moving part to extinguish an arc generat... | 12/14/2006 |
| 20060044091 | Low voltage circuit breaker The invention relates to a low voltage circuit breaker which comprises a contact system for a principal current and an arc extinction chamber. An arc transmitting element is disposed between the contact system for the principal current and the arc extinction chamber. Sa... | 03/02/2006 |
| 20050219021 | Efficient venting means for a circuit breaker An arrangement for reducing pressure inside a circuit breaker caused by gas produced during an electrical interruption event, including a base, an interrupter assembly, and a trip unit base. A structure having a surface is positioned in the base at an angle relative to ... | 10/06/2005 |