Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7672108 | Fault interrupter and disconnect device A circuit or fault interrupting and disconnect device includes a tripping apparatus that ensures a vacuum interrupter of the device is opened upon initiation of a change of state of an associated disconnect blade assembly. The disconnect blade assembly may have an o... | 03/02/2010 |
| 7626397 | High current capable circuit testing closer apparatus and method A circuit testing closer may include a fault isolating switching device coupled between a supply side and a load side of a power distribution system and a current pulse generator coupled in parallel to the switch to generate a current pulse within the power distribu... | 12/01/2009 |
| 7122917 | Control arrangement and isolated power supplies for power electronic system A control method and arrangement is provided that monitors the condition and operating parameters of a power electronic system having power electronic devices to optimize operation of the power electronic system. Further, electrically isolated power supplies to indi... | 10/17/2006 |
| 6963475 | Monitoring and control for power electronic system A control method and arrangement that monitors the condition and operating parameters of a power electronic system having power electronic devices and responds to various detected abnormalities to optimize operation of the power electronic system. The arrangement in... | 11/08/2005 |
| 6950764 | Arrangements to detect and respond to disturbances in electrical power systems A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a comparison of actual voltage of a source and a reference voltage. When t... | 09/27/2005 |
| 6943313 | Rotating arc fault-current interrupter A rotating arc fault-current interrupter, also known as an arc spinner interrupter, is provided that establishes an easily visible open gap via a movable blade member having a first portion for engaging a stationary main contact and a second portion formed by an arc... | 09/13/2005 |
| 6922132 | Fuse cutout with improved dropout performance An improved fuse cutout is provided of the type having a fuse tube assembly that moves to a dropout position upon operation in response to a fault current or other overcurrent. These types of fuse cutouts include the pivotal mounting of the fuse tube assembly with r... | 07/26/2005 |
| 6917186 | Monitoring and control for power electronic system A control method and arrangement that monitors the condition and operating parameters of a power electronic system having power electronic devices and responds to various detected abnormalities to optimize operation of the power electronic system. The arrangement in... | 07/12/2005 |
| 6867679 | Mounting for circuit interrupter A mounting for a circuit interrupter is provided that facilitates the easy removal and insertion of the circuit interrupter. The mounting includes upper and lower terminal and support arrangements that cooperate with upper and lower device mounting studs of a circui... | 03/15/2005 |
| 6777043 | Fuse tube and method of manufacture thereof An arc-quenching composition is provided including a filler, a fiber and a binder. Preferably, the filler includes an arc-quenching compound such as melamine. The binder includes a thermosetting resin to facilitate forming of the arc-quenching composition into an ar... | 08/17/2004 |
| 6696658 | Circuit interrupter and operating mechanism therefor A single-pole circuit interrupter is provided that includes a sealed housing containing a pressurized gas, relatively movable contacts and an operating mechanism for operating the relatively movable contacts. The operating mechanism is responsive to a low... | 02/24/2004 |
| 6538422 | Voltage sensor bushing assembly with integral capacitance screen A voltage sensing apparatus includes an output for a voltage tap point that is useful in representing the voltage on a conductor that passes through the voltage sensing apparatus. The voltage sensing apparatus also performs the function of a separable ins... | 03/25/2003 |
| 6483067 | Electrical power distribution switch An electrical power distribution switch includes an operating member that carries a first plurality of spaced switch contacts and a support arrangement for pivotally supporting the operating member. One of the ends of the operating member includes a circu... | 11/19/2002 |
| 6423903 | Method and arrangement for minimizing electrical field stress in circuit interrupters and housings therefor A method and arrangement is provided for minimizing electrical field stress on circuit interrupters and their housings via the arrangement of the external sheds or skirts of the housing. In one arrangement, some of the sheds are grouped about each side of... | 07/23/2002 |
| 6271653 | Power supply operable with wide input range An arrangement provides a power supply for low voltage circuits that is connected to receive and store energy from a power electronics switch that is connected to an alternating current supply. The power supply is operative over a wide range of input and ... | 08/07/2001 |
| 5808378 | Control arrangement and method for high-speed source transfer switching system A control arrangement and method is provided for high-speed source-transfer switching systems (HSSTSS). The HSSTSS supplies an electrical load with alternating current from either a first source or a second source via respective first and second solid-sta... | 09/15/1998 |
| 5635692 | Contact arrangement for electrical apparatus A contact arrangement is provided for engaging first and second stationary contacts in a predetermined sequential manner, for example so as to appropriately provide a pre-insertion function via the first contact and prior to engagement of the second conta... | 06/03/1997 |
| 5600112 | Bushing assembly with circuit interrupters including polyphase operating mechanism A bushing assembly is provided that functions as a circuit interrupter for electrical equipment such as a power transformer or the like. The bushing assembly is mounted so as to extend through the housing of the electrical equipment and incorporates a cir... | 02/04/1997 |
| 5303112 | Fault detection method and apparatus Method and apparatus are provided responsive to the circuit parameters at one or more locations of an electrical power transmission and/or distribution network for detecting protective device operation. The detection of the protective device operation is ... | 04/12/1994 |
| 4975551 | Arc-extinguishing composition and articles manufactured therefrom An arc-quenching composition that is suitable for deionizing and extinguishing a high-voltage electrical arc comprises an arc-extinguishing material, such as melamine, and a binder, the binder including a thermoplastic polymer polymerized from a carboxyli... | 12/04/1990 |
| 4916573 | Control circuit for a circuit interrupter A control circuit is provided for a circuit interrupter that achieves an inverse-time characteristic for overcurrents that include instantaneous current levels higher than the interrupting capability of the circuit interrupter by synchronizing the operati... | 04/10/1990 |
| 4788519 | Exhaust control device for circuit interrupter An exhaust-control device is provided to absorb the energy of exhaust gases released during operation of a circuit-interrupting device such as a power fuse or an expulsion fuse. The exhaust-control device includes a first heat-absorbing medium through whi... | 11/29/1988 |
| 4427963 | Brake and operation indicator for a high-voltage switch A brake and operation indicator for a movable contact of a switch, the movable contact being rapidly moved by ignition of a power cartridge to open the switch. A thin-walled sleeve is positioned conformally about a movable pin, a portion of which is light... | 01/24/1984 |
| 4346307 | Voltage-unbalance detector for polyphase electrical systems A detector for high-voltage, polyphase gear, having a fuse-switch combination in each phase and a switch operator, includes voltage sensors which provide first time-varying signals indicative of the magnitude and phase orientation of the phase-to-ground v... | 08/24/1982 |
| 4338499 | Anti-paralleling apparatus for high-voltage gear In high-voltage switchgear, apparatus for preventing two switches from being closed at the same time to prevent their being electrically paralleled relative to a common bus. The position of each switch is mimicked by a rotatable cam having a notch. When e... | 07/06/1982 |
| 4263572 | Shunt trip mechanism for a circuit interrupting device A shunt trip mechanism includes a ratchet facility added to a self-contained, line potential stored-energy operating mechanism of a circuit interrupting device. Operation of the ratchet facility releases the stored energy to operate the device. A portion ... | 04/21/1981 |
| 4253081 | Excessive overcurrent disabling mechanism for a circuit interrupting device Disclosed is a mechanism for preventing the operation of a circuit interrupting device during the occurrence of excessive overcurrent. The circuit interrupting device includes an insulative housing having circuit-connectable opposed terminals thereon. Inc... | 02/24/1981 |
| 4253003 | High voltage switch operating mechanism Disclosed is an improved high voltage switch operating mechanism which utilizes energy stored in a spiral spring to drive high voltage switches from either the open to the closed position or the closed to the open position. A spiral spring interconnects a... | 02/24/1981 |
| 4251699 | Arc extinguishing material comprising dicyandiamide An arc quenching composition suitable for deionizing and extinguishing a high voltage electrical arc comprising an effective proportion of dicyandiamide. Depending on the application in which the arc extinguishing composition is employed, the dicyandiamid... | 02/17/1981 |
| 4250476 | Auxiliary switch for indicating the condition of a circuit-interrupting device An indicator is disclosed for a high voltage circuit interrupter having a stored-energy mechanism for biasing the contacts open. The interrupter has a shunt trip mechanism to open the contacts in response to either circuit conditions or a remote command, and a... | 02/10/1981 |
| 4241248 | Circuit interrupting device A circuit interrupting device has a stationary contact. A movable contact is carried by a movable double-walled conductive tube which is telescoped and electrically continuous with a stationary tube. The tubes carry all of the current through the device. ... | 12/23/1980 |
| 4237357 | Operating mechanism for a high-voltage switch An improved operator for a high-voltage switch. Prior art operators have a drive member connected to the switch for operation thereof. Immediately after the switch is opened, the drive member is held by a first latch and a spring is automatically charged ... | 12/02/1980 |
| 4231028 | Ready indicator for high-voltage switchgear A "ready" indicator for high-voltage switchgear. The switchgear contains switches having normal positions (opened or closed) and switch operators therefor. The switch operators may include stored energy devices which may be charged or uncharged. The switc... | 10/28/1980 |
| 4220942 | Circuit interrupting device An improved circuit interrupting device includes a pair of contacts which are relatively movable and between which an arc is established. Following melting of a fusible element, a stored energy source relatively moves the contacts apart to elongate the ar... | 09/02/1980 |
| 4203083 | Operating mechanism for a circuit interrupting device A bus-mountable, circuit-interrupting device, including an interrupting unit and a novel line-potential, manually-resettable operating mechanism for the unit, is usable in circuits in which faults may exceed the interrupting capability of the unit. A norm... | 05/13/1980 |
| 4193053 | Circuit interrupting device with arcing rod speed modifying means A lead weight or other mass is crimped to the contact button assembly of the arcing rod of a high-voltage alternating-current power fuse thereby increasing the mass of the arcing rod without increasing the diameter of the rod. The increased mass of the ar... | 03/11/1980 |
| 4192534 | High voltage fuse having attached tubular members Disclosed is novel high-voltage fuse which includes therein attached tubular members. A method of attaching one tubular member such as a hollow metallic conducting tube to another tubular member such as a hollow insulator tube of a high voltage fuse compr... | 03/11/1980 |
| 4190755 | Switch operator uncoupling mechanism Disclosed is an operating mechanism for high voltage switches that incorporates certain uncoupling, drawout, and interlocking features. The operating mechanism is mounted on rollers which roll in tracks on upper and lower mounting brackets attached to the... | 02/26/1980 |
| 4169973 | Bounce-resistant contacts for a switch A bounce- and weld- resistant contact assembly includes a pair of spaced contact plates with facing contacts on their ends. A switch blade is rapidly movable into and out of engagement with the contacts. The contacts are convexities coined into the plates... | 10/02/1979 |
| 4161711 | Circuit interrupting device An improved circuit interrupting device extinguishes an arc by directing a dielectric fluid at the arc as it is elongated. Elongation is effected by relative movement apart of a pair of contacts between which the arc is established. A reservoir contains a... | 07/17/1979 |
