"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 7352564 | Power distribution substation An improved power distribution unit substation, having a plurality of differing voltage rated main breaker cells, encased within a single housing is disclosed. The improved power distribution substation saves considerable floor space as compared to prior art substat... | 04/01/2008 |
| 7123485 | Techniques for moving a power supply within an electronic cabinet An electronic cabinet includes a base, and an electronic cabinet frame which extends vertically from the base. The electronic cabinet frame is configured to support electronic circuitry. The electronic cabinet further includes a power supply positioning assembly hav... | 10/17/2006 |
| 7095113 | Semiconductor device with interlocking clip A semiconductor device is provided having a single-piece clip that interlocks into a lead frame using one or more forks on the clip that mate with one or more corresponding slots in the lead frame. A semiconductor die is mounted to a pad of the lead frame and the cl... | 08/22/2006 |
| 7091432 | Power circuit breaker A power circuit breaker includes an insertion rack which is arranged in a distribution unit and a lock system for locking the power circuit breaker in the insertion rack in a locking system. The locking system can be actuated by a drive mechanism, in particular by t... | 08/15/2006 |
| 7063572 | Motor control center interconnection method and apparatus In one embodiment, the components within each respective unit of the MCC are connected powered by a connector assembly that is directly engaged to secondary power and network data conductors disposed of within the enclosure. The connector assembly, if so desired, wi... | 06/20/2006 |
| 6958456 | Positive locking, trigger grip, external operating handle assembly for network protector enclosures A handle assembly for a network protector where the network protector includes a circuit breaker and a housing assembly, the circuit breaker having a trip bar structured to move between a first position and a second position corresponding to an open and closed posit... | 10/25/2005 |
| 6545859 | Automatically operating interlock assembly for electrical cabinets An automatically operating interlock device prevents access to the interior of an electrical cabinet when the device within the cabinet is electrically connected with a power supply. The interlock device is particularly suited for arc resistant circuit br... | 04/08/2003 |
| 6388868 | Automatically operating interlock assembly requiring an electrical cabinet to be closed before connection of the equipment therein An automatically operating interlock prevents connection of an electrical device within a cabinet unless the cabinet door is closed. The interlock is particularly useful for circuit breakers contained within arc-resistant cabinets. The interlock includes ... | 05/14/2002 |
| 5726401 | Cable/crossbar interlock system for circuit breakers A cable interlock system is provided for preventing at least two circuit breakers from both being closed, comprising: a first circuit breaker assembly comprising a first main contact, a first cross bar, a first cross bar plunger, a first transfer assembly... | 03/10/1998 |
| 5691518 | Sliding trigger interlock and secondary disconnect contacts for drawout switches An automotive secondary disconnect mechanism for a removable circuit device is disclosed. According to a preferred embodiment, the disconnect mechanism comprises a guide bar, a slide block mounted on the guide bar and means for locking the slide block in ... | 11/25/1997 |
| 5623135 | Power source switching device with plural interlocking elements A switch unit is movably arranged in a housing for selective connection of two power sources to a load circuit. When the switch unit is extracted out of the housing, one power source is connected to the load circuit via one by-pass switch unit arranged on... | 04/22/1997 |
| 4937403 | Power source switching device In construction of a switching device interposed between a pair of power sources and a load circuit and provided with switch and by-pass units, the switch unit is extractable from its housing and operation of the by-pass circuit is interlocked with positi... | 06/26/1990 |
| 4926286 | Enclosed switchboard An enclosed switchboard has a contact frame fitted with contacts which can move relative to a unit frame having a circuit breaker, an electromagnetic switch, and an auxiliary relay, etc. mounted thereon. The contacts can be operated to disconnected, test,... | 05/15/1990 |
| 4914549 | Circuit breaker movement mechanism A mechanism for moving and supporting a circuit breaker relative to a bus bar arrangement such that the circuit breaker can be engaged and disengaged from the bus bar arrangement. The mechanism functions to engage and disengage the circuit breaker while a... | 04/03/1990 |
| 4814942 | Drawout switchgear cell frame A drawout switchgear apparatus is characterized by a cell having a front opening through which a circuit breaker is movable on tracks into and out of the cell for engagement and disengagement with electrical terminals within the cell. A cell frame include... | 03/21/1989 |
| 4768132 | Disconnect contact arrangement for switchgear movably arranged at guides A disconnect (break) contact arrangement has disconnect contact blocks which are arranged between two support bars which are common to the disconnect contact block for one pole of the switchgear. Inner clamping pieces seize projections of the disconnect c... | 08/30/1988 |
| 4743715 | Draw-in and draw-out mechanism of an electrical circuit breaker with main and auxiliary circuits The invention relates to a draw-in mechanism for an extractible molded insulated case circuit breaker, equipped with main and auxiliary circuits with fixed and movable connectors. The fixed connectors are arranged on the upper horizontal wall of the case,... | 05/10/1988 |
| 4713501 | Partitioned switching panel with insertable switching carriage and adjustable shutter mechanism A partitioned switching panel of the type including a power switch provided with first switch contacts and mounted on a carriage which is movable toward and away from cooperating stationary second switch contacts disposed behind a partition of the switchi... | 12/15/1987 |
| 4703137 | Electric switchgear with a pull-out frame and a switching device that can be inserted therein A pull-out frame for a switching device with a threaded spindle and a tripping device which can be actuated by a tool provided for actuating the threaded spindle. In the switching device, a coupling member is arranged which transmits the motion of the tri... | 10/27/1987 |
| 4565908 | Drawout switchgear apparatus with retractable shutter mechanism for terminal stabs Drawout switchgear apparatus characterized by a cell having a plurality of spaced fixed terminal stabs therein, an insulating shutter structure extending across the terminal stabs, a switchgear unit removably disposed in the cell and including terminal me... | 01/21/1986 |
| 4482936 | Drawer type enclosed switchboard with automatic grounding device In a drawer type enclosed switchboard in which equipment constituting a main circuit are built and which includes an inner truck device for connecting or disconnecting the main circuit through its horizontal movement, and an outer truck device supporting ... | 11/13/1984 |
| 4432036 | Switchgear with stab-positioning system A circuit breaker switchgear housing device having a stab positioning system whereby a draw-out circuit breaker having separable contacts is contained in the switchgear housing. A stab positioning system is utilized so as to precisely locate stabs so that... | 02/14/1984 |
| 4427854 | Racking mechanism for motor control center An improved mechanism for racking a contactor mechanism within an enclosure. The mechanism is urged into a fully-engaged position by an arm extending from a rotatable cross shaft which in turn is operated by a pair of complementary four-bar linkages. The ... | 01/24/1984 |
| 4285026 | Parallel plane shutter for LK breaker Circuit breaker cubicle shutters wherein a pair of shutters are slidable vertically with respect to a back plate and with respect to each other and behind the back plate. The back plate is provided with a plurality of upper openings registering with upper... | 08/18/1981 |
| 4272798 | Composite groundable barrier for switchgear and grounding apparatus A grounding arrangement for a shutter for a high voltage metal clad switchgear arrangement is taught. The shutter is a composite of an electrically insulating material such as polyester and islands of electrically conductive material such as non-magnetic ... | 06/09/1981 |
| 4236189 | Enclosed switchboard In an enclosed switchboard in which a circuit breaker in a cubicle is drawn out from or pushed in toward a disconnecting switch, a controlling circuit housed in the cubicle for supplying a signal to the driving device of the circuit breaker and for transm... | 11/25/1980 |
| 4216521 | Composite groundable barrier for switchgear A shutter for high voltage metal clad switchgear is taught which is a composite of electrically insulating material such as polyester and islands of electrically conductive material such as non-magnetic aluminum. The polyester material reduces the chance ... | 08/05/1980 |
| 4202028 | Ground and test apparatus with indicia means A ground and test apparatus is provided for use in combination with switchgear apparatus of the type which includes upper and lower circuit breaker compartments. The switchgear contacts in each of the compartments are disposed in a reverse order such that... | 05/06/1980 |
| 4086452 | Isolating switch shutter assembly for high voltage motor starter A high voltage motor controller which is capable of accepting a modular plug-in unit comprising a power fuse assembly and isolating switch apparatus of a drawout type, and characterized by a safety shutter mechanism for mechanically driving an isolating s... | 04/25/1978 |
| 4017698 | Draw-out type circuit interrupter with modular construction A circuit interrupter includes an automatic circuit breaker in a draw-out unit removably mounted within an enclosure. A levering mechanism is provided to lever out the draw-out unit on rails to permit complete disengagement of the circuit breaker from loa... | 04/12/1977 |