Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 4862324 | Switchgear enclosure and method of fabrication An enclosure and method of fabrication thereof is provided for metal-enclosed switchgear. The enclosure includes at least one access opening and is assembled from a plurality of generally planar panels. The enclosure includes at least three vertical wall ... | 08/29/1989 |
| 4827088 | Electrical ring main unit A three-phase electrical ring main unit comprising a lower chamber module (30) having a wall structure formed from insulating resin material; three input contacts (35), one for each phase, mounted within the lower chamber; three lower switching contacts (... | 05/02/1989 |
| 4821143 | Switchgear enclosure with improved supporting frame and improved access door A switchgear apparatus comprising a row of pressure vessels, a frame including first and second generally horizontal, elongated members rigidified by the row of pressure vessels, an outer housing including a generally horizontal top portion supported by t... | 04/11/1989 |
| 4797781 | Earthquake resistant high voltage device To install a high voltage device, particularly a high voltage breaker having two interrupting chambers and a high voltage insulator in a simple earthquake resistant manner, an end flange of the high voltage insulator on the ground potential side is rotata... | 01/10/1989 |
| 4791530 | Insulating barrier system for switchgear A barrier system is provided for electrical switchgear having an enclosure and one or more access openings. The barrier system comprises a plurality of barriers, each of which is a generally planar member. The barrier system further includes manually oper... | 12/13/1988 |
| 4774627 | Metal-encapsulated switching apparatus A metal-encapsulated switching apparatus includes a housing having first and second opposite ends, a first insulator disposed at the first end and a second insulator disposed at the second end. First terminals are supported on the first insulator. First p... | 09/27/1988 |
| 4769739 | Electrical switching apparatus enclosure having a controlled opening door for gas venting A handle operated door latching mechanism for moving upper and lower latch members into and out of engagement with a latching surface of an enclosure which becomes distorted by internal gas pressure to pull the latch members away from the latching surface... | 09/06/1988 |
| 4752859 | Arrangement for providing various circuit protection device configurations An arrangement for efficiently assembling and providing a plurality of circuit protection device configurations by use of major components that are common to the configurations and that are adapted for interconnection and functioning with each other; some... | 06/21/1988 |
| 4744765 | High voltage ground stud A high voltage ground stud and insulative enclosure consists of a double-ended bolt having one end threaded for attachment to the switchgear terminal bus, with the other end threaded for engaging the thermoplastic insulative enclosure. A thermoplastic ins... | 05/17/1988 |
| 4739442 | High current mechanical connect/disconnect switch A connect/disconnect switch which is partially immersed in a cryogenic coolant includes colinearly arranged electrically conducting hollow cylinders separated by an electrically insulating as well as thermally insulating support member. An electrically co... | 04/19/1988 |
| 4698726 | Structure for attaching a switchgear to a rail A structure for attaching to a flanged mounting rail assemblies of electrical devices such as contactors mechanically joined with each other. A device mounted to each of the contactors, for detachably attaching each contactor to the rail, has a fixed hook... | 10/06/1987 |
| 4689716 | Modular barrier assembly A barrier for use in electrical terminal cabinets includes a set of barrier guides permanenty affixed to the rear of the cabinets and a set of inwardly extending support rails mounted to the sidewalls of the cabinet. A modular barrier assembly slidably en... | 08/25/1987 |
| 4688143 | Fuse well and housing for pad-mounted, double fused switchgear An improved, lowcost double-fused vacuum switchgear apparatus designed for underground electrical distribution systems is provided which makes use of a specially configured oil tank-defining wall and insulative protective fuse well sleeves to give enhance... | 08/18/1987 |
| 4677524 | Metalclad switchgear having separate assemblies A metalclad switchgear has three assemblies which are separately arranged in separate housings for housing a circuit breaker, a control line and a cable, all constituting the metalclad switchgear and which can be detachably coupled. The three assemblies a... | 06/30/1987 |
| 4674305 | Locking mechanism for doors of switching cells A pressure-resistant locking mechanism for locking a door of a switch cell accommodating a switching device includes two pivotable locking bars positioned in hollows formed by U-shaped door edges and U-shaped portions of the wall of the switch cell at a h... | 06/23/1987 |
| 4543455 | Explosion-proof switching installation with a bus bar duct A switching installation of explosion-proof design comprises a bus bar duct of the German protection class "Increased Safety" (Sch)e and housings of the German protection class "Explosion-Proof Enclosure" for accommodating switching devices. The electrica... | 09/24/1985 |
| 4541033 | Power switch assembly having a circuit breaker and a circuit disconnector A power switch assembly has a horizontal supporting base, a circuit disconnector including a first supporting porcelain insulator vertically disposed on the supporting base, a stationary contactor supported by the free end of the first insulator, and a ro... | 09/10/1985 |
| 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 |
| 4484086 | Switching network A switchgear installation has at least four junctions connected in the form of an annulus. These junctions are connected with each other by means of interruptable current branches. Each junction of a first group of junctions containing at least two elemen... | 11/20/1984 |
| 4445162 | Compact chassis plate for switchgear enclosure An improved housing structure for a circuit interrupter. The interrupter mechanisms are mounted upon the upper surface of a platform which serves to divide the housing into upper and lower, high- and low-voltage compartments. The platform is provided with... | 04/24/1984 |
| 4440998 | Segmented circuit breaker housing with rotatably adjustable bushing positions A multi-pole circuit breaker has interrupters contained in respective housing sections which have two bushings extending perpendicularly from either end of the housing section. Each housing section is segmented at its center so that the two halves which a... | 04/03/1984 |
| 4367512 | Transportable power supply substation A transportable power supply substation is a power supplying equipment in which electric power machines are mounted on transporting apparatus. The transportable power supply substation in accordance with the present invention including transporting means ... | 01/04/1983 |
| 4268890 | Breaker combination for bus bar installations A breaker combination, for use in bus bar installations for connecting at least one bus bar with at least one branch, includes an encapsulating tube and a rotatable switching tube axially disposed in the tube. Stationary counter-contacts arranged on the i... | 05/19/1981 |
| 4179169 | Facade for a data processing system A facade for enclosing data processing apparatus or similar equipment. The facade is designed to be a free-standing unit, enclosing completely a multiple-component data processing assemblage. However, the facade can also be utilized in conjunction with ex... | 12/18/1979 |
| 4114336 | Electrical switchboard framework A framework for an electrical switchboard comprises four angled uprights, and top and bottom angled crossbars. The uprights and crossbars each have the same cross section and are formed of sheet metal folded into four parts. The first part is contiguous w... | 09/19/1978 |
| 3989986 | Metal enclosed switchgear having well-shaped front covers Each section of a three-phase metal enclosed switchgear unit is provided with main through horizontal bus and vertical section bus. The front of each switchgear section is divided into vertically disposed enclosures for housing circuit breakers or circuit... | 11/02/1976 |
