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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...
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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...
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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...
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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...
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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...
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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 (I 1 ) to a second dynamic value (I 2 ) which is then caused to...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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3842380 |
COMBINED CUT-OUT SWITCH AND CIRCUIT BREAKER
A cut-out switch and circuit-breaker device having removable fuses with plungers, respectively connected up in series, each with a pole of the cut-out switch and co-operating with an auxiliary...
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3829807 |
CONTACT HOLDER WITH ADJUSTABLY MOUNTED SWITCH
A female-type clip or holder removably engages a terminal of an electrical device having an ejectable pin means. The terminal is engaged by the spaced arms of the holder, with one of these arms...
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3828289 |
COMBINED CURRENT AND TEMPERATURE SENSITIVE FUSE ASSEMBLY
A combined current and temperature sensitive fuse assembly of a given current and temperature rating for installation between an electric source and an electric load comprises a pair of electrical...
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3796980 |
DISPOSABLE CIRCUIT BREAKER
A circuit breaker characterized by relatively movable contacts and operating mechanism therefor together with a bimetal trip element and a latch member releasably restraining the operating...
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3638157 |
COMBINATION MOTOR STARTER
An improved combination motor starter with low overload protection; adjustable low-level fault protection; heavy short circuit interrupting capacity; and a coordinated protection system that...
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3614697 |
MOLDED CASE ELECTRIC CIRCUIT BREAKER WITH FUSE AND INDICATOR LAMP
A circuit breaker is provided with a current-limiting fuse mounted in a removable fuse holder and electrically connected in series with the circuit breaker contacts. A self-biasing mechanical...
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3599135 |
CIRCUIT PROTECTION ARRANGEMENT INCLUDING COORDINATED OPERATION OF A CIRCUIT BREAKER AND A CURRENT LIMITING FUSE
A circuit protective arrangement which utilizes a circuit breaker and current limiting fuse to achieve reliable current interruption when connected to a source having an available current in excess...
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3573428 |
CIGARETTE LIGHTER WITH A FUSIBLE CIRCUIT BREAKER
A cigarette lighter of the type having a manually removable igniting plug slidably received in the open end of a mounting case which includes a current inlet supply post for completing an igniting...
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3533038 |
NON-INTERCHANGEABLE MEANS FOR CIRCUIT BREAKER FUSE CONNECTIONS
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3510817 |
CIRCUIT INTERRUPTER
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3480899 |
CIRCUIT INTERRUPTERS
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3354356 |
Cartridge-type fuse mounting block and mounting therefor
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3324263 |
Safety tripping mechanism
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3280282 |
Combination current limiting fuse and vacuum switch
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3280280 |
Interlock defeater for current limiting circuit breakers
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3268681 |
Circuit interrupters
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3112383 |
Combined circuit breaker and fuse
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3070728 |
Selective trip arrangement utilizing circuit breakers which are coordinated with current limiting fuses
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