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| Number | Title | Issue Date |
| 7362207 | Electrical switching apparatus and limiter including trip indicator member A limiter includes a housing having a first surface and a second surface, a line terminal, a load terminal, a fusible conductor electrically connected between the line and load terminals and an indicator button disposed proximate the first surface. The button includ... | 04/22/2008 |
| 7323956 | Electrical switching apparatus and trip unit including one or more fuses A circuit breaker includes a circuit breaker frame and a trip unit. The circuit breaker frame includes a housing, a line terminal, a load terminal, separable contacts electrically connected between the line terminal and the load terminal, an operating mechanism stru... | 01/29/2008 |
| 7289309 | Isolation apparatus The apparatus is intended for disconnection of a live electrical conductor and has an enclosure (3) and two power connections (1, 2) which are passed out of the enclosure (3). A conductor section (7) which connects the two power connectio... | 10/30/2007 |
| 7230516 | Circuit breaker A circuit breaker includes a body having a neck member integrally connected thereto. A flange extends from an inner periphery of the neck member and a recess is defined in an inner periphery of the flange. Two terminals are connected to the body and a bi-metallic pl... | 06/12/2007 |
| 6998954 | Fused electrical disconnect device A fused electrical disconnect device comprises a housing and line and load connectors extending from one side of the housing. A line buss is disposed within the housing and is electrically connected to the line connector. A load buss is also disposed within the hous... | 02/14/2006 |
| 6563685 | Thermal protection relay The thermal protection relay determines a value representative of the thermal image of an apparatus to be protected according to a measured current value, to a previous value of the thermal image and to preset heating and cooling time constants. The relay... | 05/13/2003 |
| 6489867 | Separating pins for the shunt wires of a circuit breaker A pair of shunt wire spacer pins provides for proper spacing between the shunt wires extending from the movable arm to the bimetal within a circuit breaker, thereby ensuring that the shunt wires do not come together during over-current conditions within t... | 12/03/2002 |
| 6388894 | Pre-wiring device for contactors A pre-wiring device creating a logic function such as an inverter function or a star-delta start function between at least two multi-pole contactors located side by side and used particularly in electrical control equipment of motors. A same pre-wiring de... | 05/14/2002 |
| 6252488 | Metal oxide varistors having thermal protection A layer of thermal fusible material is placed on one surface of a metal oxide varistor (MOV) to monitor the heating of the MOV due to applied voltage spikes. The thermal fusible material is part of the electrical circuit which includes the MOV and melts a... | 06/26/2001 |
| 6141202 | Method and apparatus for triggering a fuse The response time of a melting fuse is controlled or influenced by temporarily boosting a threshold level from a first constant value (I1) to a second dynamic value (I2) which is then caused to decay in a controlled manner during a f... | 10/31/2000 |
| 5835002 | Interlock assembly for a manually operated multi-phase fusible switch An interlock assembly is provided for use in a manually operated multi-phase fusible switch having a fuse in series with a blade for each phase and a handle for simultaneously controlling the position of the blades. Each fuse is CONDUCTIVE when it allows ... | 11/10/1998 |
| 5757260 | Medium voltage switchgear with means for changing fuses Fuses for the potential transformers (PTs) in medium voltage switchgear are mounted in fuse assemblies which are reciprocated within the switchgear enclosure independently of the transformers they protect between a connected position in which the fuse ass... | 05/26/1998 |
| 5633619 | Interlock assembly for a fusible switch having an operating mechanism An interlock assembly is provided for a fusible switch which has a fuse in series with a switch and an operating mechanism for controlling the operation of the switch. The interlock assembly is mechanically coupled to the operating mechanism and includes ... | 05/27/1997 |
| 5629569 | Thermal photocontrol switch circuit A self-configuring photoelectric control circuit for controlling operation of a load based on ambient light. The photocontrol circuit comprises a photocell responsive to ambient light, a heating resistor connected to the photocell, a bimetallic element in... | 05/13/1997 |
| 5457292 | Load interrupting switch for live front padmounted switchgear A load interrupter device is provided for live front padmounted high voltage switchgear unit wherein circuit interruption is independent of the speed at which a lineman opens the switch of the switchgear. The interrupter includes an insulating body having... | 10/10/1995 |
| 5148139 | Fuse switch unit for panelboards A fuse switch unit for use in a panelboard is provided which can be engaged via plug-on terminals with a busbar supply system. The unit includes a switch mechanism having in front thereof lug terminals for coupling fuse links which are adjacent the operat... | 09/15/1992 |
| 4692835 | Fuse circuit unit for combination with an electromagnetic switch A fuse circuit unit for combination with an electromagnetic switch has a first terminal having one end thereof adapted to be connected to one terminal of a main fuse of a load circuit, and another end adapted to be connected to of the input terminal of th... | 09/08/1987 |
| 4688011 | Motor safety switch A motor safety switch which eliminates much of the costs of conventional wiring, material and labor, the motor safety switch being formed of a plurality of assembled independent components; a first of the components including a switch unit having a contac... | 08/18/1987 |
| 4507641 | Driving mechanism for a three-position electrical switch A three-position electrical driving mechanism having a jump-drive sub-assembly, a pivotable actuator and associated spring arrangement for storing energy, a detent arrangement and associated latches for holding the detents in place, a release arrangement ... | 03/26/1985 |
| 4496916 | Switch fuse unit A modular switch-fuse unit is provided which can be engaged via terminals 26 with a busbar supply system. The unit is divided into a switch compartment 14 and a fuse compartment 16, the latter having an access door 36 which is normally blocked by operatin... | 01/29/1985 |
| 4491820 | Device for terminating a fusible element of an interrupting module A terminator device for a fusible element ribbon surrounding a switch in an interrupting module. The device is a conductive collar mountable to a terminal of the switch and an integral finger to which an end of the ribbon is attachable. One or more slotte... | 01/01/1985 |
| 4490707 | Explosively-actuated, multi-gap high voltage switch A high-speed switch usable at high voltage includes a pair of contacts movable apart along a fixed line. When the contacts are normally interconnected, at least one of them contributes to the definition of an enclosed chamber. Pressurization of the chambe... | 12/25/1984 |
| 4472704 | Pressure-operated switch for a high-voltage interrupting module An improved switch for a high-voltage device in which ignition of a power cartridge moves an insulative piston located in a conductive member, into a passageway in an insulative liner, said piston moving a contact through the passageway and away from the ... | 09/18/1984 |
| 4459464 | Electric cigar lighter The present disclosure relates to an electric cigar lighter for use, for example in vehicles, having a circuit breaker. The circuit breaker includes an elongated fuse member having a fuse and a tube for covering the fuse. The tube has a melting point slig... | 07/10/1984 |
| 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 |
| 4400677 | Fail safe circuit breaker A circuit breaker has a thermally responsive bimetallic member of substantial resistance properties disposed in the breaker circuit so that it self-heats and moves to trip a mechanism to open the breaker circuit after a selected period of time when a sele... | 08/23/1983 |
| 4370531 | Electric switch and improved device using same A high-speed switch usable at high voltage includes a pair of contacts movable apart along a fixed line. When the contacts are normally interconnected, at least one of them contributes to the definition of an enclosed chamber. Pressurizaton of the chamber... | 01/25/1983 |
| 4342978 | Explosively-actuated switch and current limiting, high voltage fuse using same A high speed high voltage electrical switch opens a current path in which the switch is included. The switch includes first and second normally electrically interconnected contacts which normally carry current in the current path. The contacts are relativ... | 08/03/1982 |
| 4324961 | Distribution transformer having a primary disconnect switch An oil-filled distribution transformer having a primary disconnect switch disposed within the housing and utilizing two movable bridging contacts and four stationary contacts for completing a series circuit therethrough. The switch includes a trip mechani... | 04/13/1982 |
| 4294015 | Extensometer An extensometer for detecting traumatized ligaments where the elongation of the ligament is either abnormally large or abnormally small compared to the elongation measured on a healthy ligament for an angle of flexion of the knee. The extensometer include... | 10/13/1981 |
| 4250480 | Apparatus and method of monitoring automatic safety control switches of electrical apparatus A heat-triggered, mechanically-actuated apparatus comprising a heating and conducting linkage connected in parallel with an automatically resetting safety control switch across the power supply of electrical equipment, an initial opening of the control sw... | 02/10/1981 |
| 4149216 | Fused unitized combination starter A multipole unitized motor starter is constructed of a common base having mounted thereon a disconnect switch, an electromagnetic contactor and a fuse unit connected in electrical series between the switch and contactor. The fuse unit is a plug-in device ... | 04/10/1979 |
| 3987382 | Unitized motor starter A unitized combination motor starter is provided with a single insulated housing wherein a plurality of pole units are disposed side-by-side. Each pole unit includes a circuit breaker contact section and a contactor contact section. A spring powered mecha... | 10/19/1976 |
| 3983454 | Distribution transformer secondary circuit breaker A distribution transformer having a secondary circuit breaker utilizing a movable bridging contact between two stationary contacts for completing a series circuit therethrough. The movable bridging contact is spring biased towards an open position separat... | 09/28/1976 |
| 3983460 | Enclosed circuit interrupter with improved fuse assembly A network protector includes an automatic circuit breaker mounted in a metal enclosure and a fuse assembly externally mounted upon the enclosure. The fuse assembly includes a fuse housing of molded insulating material and a gasketed access plate providing... | 09/28/1976 |
| 3958204 | Fused GFI unit A fused GFI unit for manually controlling the application of electrical power to a utilization device while automatically protecting the device and personnel associated therewith from electrical hazards, includes a switch plate unit have an insulated hand... | 05/18/1976 |
| 3958197 | High interrupting capacity ground fault circuit breaker A circuit protective arrangement which utilizes a circuit breaker, current limiting fuse and ground fault interruption means in a closely coordinated operation to achieve reliable current interruption in the event that an overcurrent or ground fault hazar... | 05/18/1976 |
