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| Number | Title | Issue Date |
| 7236071 | Medium voltage vacuum contactor A medium voltage vacuum contactor comprising for each pole, a vacuum envelope which contains a fixed contact and a corresponding movable contact; and actuating means providing the energy required to move the movable contacts, characterized in that said actuating mea... | 06/26/2007 |
| 6566411 | Removing sulfur from hydroprocessed fischer-tropsch products An integrated process for producing desulfurized hydroprocessed products from Fischer-Tropsch synthesis is disclosed. The process involves isolating and desulfurizing a methane-rich stream from a natural gas source in a first separation zone and a desulfu... | 05/20/2003 |
| 6414257 | Gas-insulated circuit-breaker with an integrated electronic current transformer The single-phase circuit-breaker comprises at least one interrupting chamber formed by an insulating tube filled with an insulation gas, and it comprises at least one current transformer whose secondary is disposed in air around the primary at one end of ... | 07/02/2002 |
| 6373675 | Operating apparatus for switching device In a closing magnetic circuit, when a movable contact is in contact with a fixed contact and a switching device is closed, N and S poles of a permanent magnet attract the fixed member in a direction in which the movable contact is pressed against the fixe... | 04/16/2002 |
| 5591948 | Vacuum cartridge, notably for a medium voltage electrical cicuit breaker or switch and a switch incorporating such a cartridge A vacuum cartridge for a medium voltage electrical switch, as well as a switch incorporating such a cartridge comprising an enclosure closed by two end-plates in which there are housed three contacts extending axially. Two of these contacts are stationary... | 01/07/1997 |
| 5239149 | Vacuum electrical switch A vacuum electrical switch comprises a coil arranged in the metal base plate of the cartridge. The metal base plate constitutes a current input to the contact, this input having a radial conducting path and a path forming a spiral, electrically connected ... | 08/24/1993 |
| 4272661 | High speed vacuum interrupter An electrodynamic operating mechanism is connected to a vacuum interrupter to produce an interrupter with a switching time of about one millisecond. Magnetic latch means are provided to hold the contacts open after interrupter operation.... | 06/09/1981 |
| 4117288 | Vacuum type circuit interrupter with a contact having integral axial magnetic field means A vacuum type circuit interrupter is provided with contacts which include an integral axial magnetic field generating means. In one embodiment, a disc-like contacting portion is supported from the contact base, with a pair of half-turn conductive coil pie... | 09/26/1978 |
| 4115672 | Vacuum switch and electro-magnetic coil assembly therefor A vacuum switch comprises an evacuated electrically conducting cylindrical envelope having two movable contact elements therein making electrical contact with one another in a closed condition of the switch and being separated by an electrical insulating ... | 09/19/1978 |
| 4109122 | Vacuum switch with intermittently energized electromagnetic coil An evacuated envelope contains two stationary contact elements which have an gap therebetween, and positioned within the gap are two metal discs separated by an insulating disc. Each metal disc is connected to a terminal coil which is connected to an elec... | 08/22/1978 |
