Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8106326 | Grounding switch A valley section is provided between a high-voltage arc contact and a high-voltage main contact. Because of the presence of the valley section, resistance between contacts is reduced while a moving arc contact makes contact with the high-voltage arc contact and then... | 01/31/2012 |
| 8035054 | Vacuum insulated switchgear A vacuum insulated switchgear having a vacuum container, a fixed contact disposed in the vacuum container, a movable contact disposed in the vacuum container capable of being in contact with or out of contact with the fixed contact, a driving mechanism for driving t... | 10/11/2011 |
| 7429710 | Three-position ground switch A high or medium voltage electrical switch, particularly a GIS type isolating switch with three switching positions and a grounding position, includes a switching element in a closed and sealed enclosure that can be filled with a dielectrically insulating gas, conta... | 09/30/2008 |
| 6559403 | Three-position electrical switch having a switching element that is movable in axial translation The three-position, gas-insulated, metal-clad electrical switch inside a metal casing includes first and second break contacts, a fixed grounding contact, and a switching element that is movable in an axial direction to interconnect the break contacts. Th... | 05/06/2003 |
| 6271493 | High voltage disconnector with fixed and locking members secure under Lorentz forces A high voltage disconnector comprising a fixed contact and a movable contact to the latter to produce an electrical connection between a first conductor and a second conductor, the movable contact and the fixed contact forming, when they are in contact wi... | 08/07/2001 |
| 5902979 | Gas insulation type load break system An improved gas insulation type load break system, which is capable of more easily discharging remaining current of a cable to which the power supply is disconnected, and enabling an easier cable connection test after the cable connection work is finished... | 05/11/1999 |
| 5841087 | Isolating switch The isolating switch (1) contains an isolating switch housing (2) and at least two switching points (18, 19, 20) which are arranged in the isolating switch housing (2), are of axially symmetrical design, and each have one fixed switching element (7, 8, 9)... | 11/24/1998 |
| 5650603 | Earthing switch for metal-clad high-voltage switch gear insulated with compressed gas An earthing switch may be used for a metal-clad, high-voltage switchgear insulated with compressed gas. The mobile earthing contact is arranged so as to be insulated from the earthed cladding for measuring purposes. The insulation arrangement of the earth... | 07/22/1997 |
| 5382765 | Grounding switch for a compressed-gas-insulated, metal-encased high-voltage switching system In a grounding switch for an encased high-voltage switching system, the movable switching piece is moved by a rotating drive shaft. This drive shaft passes through the housing of the grounding switch. To design the contact elements that transfer the groun... | 01/17/1995 |
| 5153398 | Metal-clad, compressed-gas insulated, high-voltage switching station with an insulated grounding switch A metal-clad, compressed-gas insulated, high-voltage switching station with an insulated grounding switch. In the case of compressed-gas insulated, high-voltage switching stations, insulated grounding switches are also used for applying test voltages. The... | 10/06/1992 |
| 5146387 | Interrupter having grounded interrupter container within a grounded cover An interrupter unit comprising, an interrupter including at least two pairs of contacts, and an interrupter container surrounding the pairs of contacts, each of the pairs of contacts having a first contact and a second contact which contacts the first con... | 09/08/1992 |
| 4577075 | Earthing switch for gas-insulated switchgear apparatus An earthing switch for gas-insulated switchgear apparatus is disclosed, in which conductor within an enclosure is provided with a stationary contact, and a moving contact is movably provided to connect with and disconnect from the stationary contact by an... | 03/18/1986 |
| 4486634 | Ground test switch for gas insulated switchgear A ground test switch comprises a terminal plate electrically connected to a movable contact member but electrically insulated from a closed vessel enclosing a high-voltage conductor, a grounding conductor disconnectably electrically connecting the termina... | 12/04/1984 |
| 4429199 | Three-pole cable connecting unit for a three-pole metal-encapsulated, high-voltage switching installation A three-pole cable connecting unit for a compressed gas-insulated high-voltage switching installation is disclosed having three cable connecting elements, a three-pole isolating switch and (optionally) a three-pole ground mechanism, as well as two three-p... | 01/31/1984 |
| 4379957 | Modular "Y"-type enclosure elements for gas insulated substations A modular "Y"-type enclosure element particularly adapted for gas insulated substations. The enclosure element comprises a first generally "Y"-shaped enclosure element having a circuit protective device, such as a circuit breaker or conductor, disposed th... | 04/12/1983 |
| 4255632 | Grounding switch for gas-insulated high voltage switchgear A grounding switch for gas-insulated, metal-enclosed high voltage switchgear in which a movable switch contact, in permanent connection with the grounded enclosure of the switchgear, and a movable counter contact at high potential, mounted on at least one... | 03/10/1981 |
| 4241379 | Gas pressurized high voltage switching installation In pressurized, gas insulated, high voltage switching installations with single or polyphase metal encapsulation, a switchgear section comprises several adjacent pressure tanks having gas tight partitions for accommodating the high-voltage switchgear and ... | 12/23/1980 |
