Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7943881 | Grounding disconnector and a method of manufacturing such a grounding disconnector An assembly for a grounding disconnector, a grounding disconnector including the assembly and a method of manufacturing a grounding disconnector are described. The assembly includes a stationary grounding contact (12), a phase contact (14) suitable for... | 05/17/2011 |
| 7432465 | Switching device with a disconnection and/or grounding function A switching device configurable as a grounding device, a disconnecting device, and a combined disconnecting/grounding device is disclosed. The switching device includes an encapsulating housing, a stationary grounding contact fixed to the housing, a stationary disco... | 10/07/2008 |
| 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 |
| 7323652 | Gas insulated switchgear The gas insulated switchgear includes a rotary shaft which penetrates a pressure vessel is connected with a moving part which is housed in the pressure vessel by way of a lever, and is connected to the moving part, and brackets which support the rotary shaft and are... | 01/29/2008 |
| 7122758 | Insulated earthing switch for gas-insulated switchgear assemblies An insulated earthing switch for encapsulated, gas-insulated high-voltage switchgear assemblies is characterized in that an encapsulation-side earthing switch contact, a measuring electrode and an earthing switch housing are arranged altogether on a single earthing ... | 10/17/2006 |
| 7122759 | Compact earthing switch for gas-insulated switchgear assemblies A compact earthing switch (1′) is provided by a mounting lid (10) of the gas-insulated switchgear assembly (15) having a concave physical volume (100) which extends the gas chamber (9) and by the earthing switch fixed contact ( | 10/17/2006 |
| 7075778 | Hybrid gas-insulated switchgear A hybrid gas-insulated switchgear constitutes an electrical circuit for a single-line diagram unit by arranging one first standardized module and two second standardized modules in a single row such that the central axes of tanks are generally aligned and electrical... | 07/11/2006 |
| 6995330 | Earthing switch A high for medium voltage gas insulated earthing switch comprises at least one conducting bar in an enclosure, with a corresponding earthing contact and a phase contact fixed to the said bar that will be electrically connected to the earthing contact to earth the sa... | 02/07/2006 |
| 6946613 | Gas-insulated switchgear A gas-insulated switchgear includes a tank filled with an electrically insulating gas, first and second conductors disposed within the tank, a disconnector for disconnecting the first conductor and the second conductor from each other, and a grounding switch for gro... | 09/20/2005 |
| 6759616 | Gas insulated switchgear A gas insulated switchgear capable of performing maintenance and inspection of a breaker without shutting down a bus line includes a first case containing a breaker and having a bushing for leading a load and a second case containing a plurality of disconnectors and... | 07/06/2004 |
| 6680453 | Gas insulated switchgear A gas insulated switchgear capable of performing maintenance and inspection of a breaker without shutting down a bus line includes a first case containing a breaker and having a bushing for leading a load and a second case containing a plurality of discon... | 01/20/2004 |
| 6660955 | Electric switch having a compartmentalized metal case for receiving disconnectors A metal-clad electric switch having gas insulation and a metal case comprises a case whose inside volume is subdivided into at least two compartments separated by a leakproof partition. A first disconnector is disposed in one of the compartments and compr... | 12/09/2003 |
| 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 |
| 6538224 | Hybrid type gas insulation switch gear apparatus In a hybrid type gas insulation switch gear apparatus, a main enclosure including a first cylindrical section have a base and a second cylindrical section branched from the base. A bushing is mounted on the cylindrical section and including a hollow insul... | 03/25/2003 |
| 6127641 | High-voltage switchgear An attachment of high-voltage lead-in insulators (1, 1') on enclosure housings (1, 1') using elbow-shaped additional housings which have rotary joints to allow the insulators to rotate in order to maintain a connection distance.... | 10/03/2000 |
| 6121566 | Switchgear for a power station generator and a transformer, with a three-position disconnector connected to the transformer The switchgear comprises a circuit breaker connected between a generator and a transformer, together with a disconnector connected between the circuit breaker and the transformer, the disconnector having a fixed pole common to three positions: a first pos... | 09/19/2000 |
| 5991148 | Metal-enclosed gas-insulated switchgear assembly This metal-enclosed, gas-insulated switchgear assembly is provided with at least one multiphase switch panel which is mounted on a foundation surface (8), with in each case at least one power breaker (1, 2, 3) per phase which extends along a longitudinal ... | 11/23/1999 |
| 5872346 | Metal-cladded electrical high-voltage switching installation with a power switch A high-voltage metal-cladded switchgear having two busbars (1, 2) and a power switch (4) with a first connected to terminals (12, 13) of two isolating switches (10, 11). The power switch has a contact point (17) that can be removed from the enclosure (3) ... | 02/16/1999 |
| 5828025 | Disconnecting/grounding switch for metal-encapsulated, gas-insulated high-voltage switchgear A disconnecting/grounding switch for metal-encapsulated, gas-insulated high-voltage switchgear. A first fixed contact is connected to a first inner conductor. A second contact is connected to an inner conductor running at right angles to the first inner c... | 10/27/1998 |
| 5796060 | Gas insulated switchgear with grounding and disconnecting switches A switching apparatus includes a grounded, insulating gas-filled housing, the housing having a housing wall, and a power circuit-breaker disposed in the housing. The apparatus further includes a current connection for a first busbar, a current connection ... | 08/18/1998 |
| 5757614 | Gas insulated switchgear apparatus A gas insulated switchgear device of a double bus type which is accommodated in a metal container filled with SF6 gas includes first and second gas insulated main buses disposed horizontally and substantially in parallel with each other. Bus se... | 05/26/1998 |
| 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 |
| 5578805 | Metal-enclosed gas-filled switchgear units A metal-enclosed, gas-filled switchgear unit has at least two busbar systems and a circuit breaker which respectively has per pole a pole axis and at least one arcing chamber built into a pole housing constructed as a metal enclosure. The pole axes are ar... | 11/26/1996 |
| 5578804 | Metal-enclosed gas-insulated switching installation A metal-enclosed, gas-insulated switching installation includes at least two busbar systems and a circuit breaker. Each circuit breaker is in the form of a pole having a pole axis and at least one extinction chamber, installed in a pole housing. The pole ... | 11/26/1996 |
| 4700270 | Metal-encapsulated gas-insulated switching system The switching system, preferably suitable for distributing electric energies of medium-high voltage, includes a metal housing which is filled with insulating gas and in which at least one circuit breaker, one isolating switch, one earthing or grounding sy... | 10/13/1987 |
| 4536659 | Visible disconnect/ground switch An improved disconnect/ground switch assembly for use in conjunction with a high voltage DC power supply is disclosed. High voltage rectified DC power is provided on a conductor through an insulating bushing. An electrically conductive contacting mechanis... | 08/20/1985 |
| 4521656 | High voltage grounding device for pressurized equipment A safety device for discharging high voltage circuits operated in pressurized containers. The device is positioned within an elbow or other protrusion through which passes the high voltage feed-through electrode. In one embodiment the grounding contact is... | 06/04/1985 |
| 4479165 | Gas insulated switching apparatus A bushing in air is supported upright on one end of a horizontal tank, and a center conductor extending in the bushing is connected to one terminal of a circuit breaker accommodated in the tank. A tank of a disconnecting switch is disposed to extend in th... | 10/23/1984 |
| 4468716 | Gas-insulated switchgear A gas-insulated switchgear apparatus comprises, (a) first and second grounded tanks filled therein with insulating gas, (b) a circuit breaker unit enclosed in the first tank, (c) a disconnecting switch unit connected to an axial extension of the first tank and encl... | 08/28/1984 |
| 4460937 | Gas-insulated switching apparatus A gas-insulated switching apparatus is disclosed which includes a circuit breaker having a breaking section with at least a couple of mutually detachable contacts and a grounded tank containing the breaking section and filled with an insulating gas, the g... | 07/17/1984 |
| 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 |
| 4207446 | Grounded tank type gas circuit breaker A grounded tank type gas circuit breaker comprises a grounded tank filled with a dielectric gas and having an opening airtightly sealed by a detachable cap, a capacitor unit electrically and mechanically connected at one end to the inner wall surface of t... | 06/10/1980 |
| 4130850 | High speed fault diverter switch for gas-insulated systems A high speed fault diverter switch is connected near the input side of a gas-insulated substation. The switch is normally open and is used in response to arcing anywhere within the substation to connect the gas-insulated high-voltage conductor to ground f... | 12/19/1978 |
| 4031347 | Protective gas cap for electric power apparatuses Spark gap apparatuses are provided at the receiving end or the sending end of an electric power substation, in order to protect electric apparatus in the electric power substation against the surge voltage incoming from the power transmission lines. In th... | 06/21/1977 |
| 4027126 | Shorting and grounding arrangement for gas-insulated bus bars A shorting and grounding arrangement for enclosed, gas-insulated bus bars in which an opening in the enclosure is provided and a pot placed over the opening, the pot containing a contact movably supported therein and having an advance contact, the main co... | 05/31/1977 |
| 4019007 | Grounded-tank high-power compressed-gas circuit-interrupter An improved grounded-tank compressed-gas circuit-interrupter of the two-break rotatable contact-arm type is provided having an improved grounded metallic-tank configuration to accommodate interiorly therein one or more arc-extinguishing assemblages of the... | 04/19/1977 |
| 3987260 | Ground and test connection for SF6 insulated bus A grounding and test switch for a fully enclosed pressurized gas insulated high voltage system wherein the conductors are completely isolated in an SF6 or other gas insulating environment. The grounding switch is provided with a contact arm and... | 10/19/1976 |
| 3943315 | High-voltage gas-type circuit-interrupter having improved gas-partitioning and particle collecting means An improved high-voltage circuit-interrupter of the gas-blast type is provided having improved gas-partitioning and particle-collecting means so provided as to prevent the entrance of small insulating, or metallic particles into the high-pressure storage ... | 03/09/1976 |
| 3935408 | Heating means for high-voltage gas-type circuit interrupter An improved heating means is provided for heating the gas in a high-voltage gas-type circuit-interrupter of the type utilizing an arc-extinguishing gas, which may be subject to the disadvantage of liquefaction during relatively moderate temperatures. The ... | 01/27/1976 |
