Circuit BreakerFree Patent Search

  • Circuit breaker

    Circuit Breaker Abstract A circuit breaker of the invention is formed of a container and a switch mechanism unit accommodated in the container. The switch mechanism unit is formed of a handle lever having a rotating shaft, a handle and lever arms; a...

  • Miniaturized automatic circuit breaker with a multi-functional terminal and a screen for protection a

    Circuit Breaker Abstract In a miniaturized automatic circuit breaker with a casing of insulating material forming an arc-extinguishing chamber and a housing for contacts which are closed and opened and for a pair of terminals for connection to ends o...

  • Gas circuit breaker and liquid pressure-driving system to be used therefor

    Circuit Breaker Abstract For the purpose of providing a gas circuit breaker with a structure of hydraulic pressure operation system capable of detecting the occurrence of an incomplete closed state of the valves therein to prevent their erroneous mot...

  • Shock absorber for circuit breaker

    Circuit Breaker Abstract A circuit breaker has a shock absorber to prevent nuisance tripping which results from shock generated during ON to OFF operation of the circuit breaker. The shock is primarily caused by a snap action which occurs within the...

  • Arcing fault detector with multiple channel sensing and circuit breaker incorporating same

    Circuit Breaker Abstract Arcing faults are detected by a multi-channel arc fault detector in which each channel includes a bandpass filter having an assigned discrete passband which is non-overlapping with the passband of any of the other bandpass fi...

  • Arc fault detector with immunity to tungsten bulb burnout and circuit breaker incorporating same

    Circuit Breaker Abstract A circuit breaker with an arc fault circuit provides immunity to false trips caused by tungsten bulb burnout and by a cold tungsten filament energized through a solid state dimmer. The detector circuit includes a pulse genera...

  • Circuit breaker with improved impact resistance

    Circuit Breaker Abstract The present invention provides a circuit breaker assembly having a base, cover, and switch handle adapted to withstand an external force applied to a lever of the switch handle. During normal operation the handle rotates on s...

  • High-voltage gas-blast circuit-breaker

    Circuit Breaker Abstract A gas-blast gas-insulated high-voltage circuit-breaker comprises a fixed main contact, a fixed arc contact and a mobile assembly comprising a main contact, an arc contact and a compression volume cooperating with a fixed pist...

  • Circuit breaker box

    Circuit Breaker Abstract A circuit breaker box including a holder base having two wire holder shieldings and pairs of clamping spring plates in the wire holder shieldings, each of the clamping spring plates having a pair of vertical ribs disposed at...

  • Circuit breaker line and load terminal

    Circuit Breaker Abstract A spring-loaded cam electrical connector is used to rapidly connect circuit breaker load terminal straps with the associated electric distribution system wire conductors. Rotation of the cam in one direction traps the end of...

  • Circuit breaker tester

    Circuit Breaker Abstract Apparatus and method for opening circuit breakers in a circuit are disclosed. The apparatus includes input terminals adapted to be connected to the circuit, a switch and a load. When the apparatus is connected to the circuit...

  • Puffer type gas circuit breaker

    Circuit Breaker Abstract A puffer type gas-blast circuit breaker includes a guide section arranged at a coupler section between a shaft section of a puffer cylinder and a dielectric operating rod, for guiding both in the axis direction of a current i...

  • Rower circuit-breaker having a closing resistor

    Circuit Breaker Abstract The power circuit-breaker is provided with at least one arcing chamber which extends along a central axis and has at least one power interruption point with at least one contact which is moved by a drive. A closing resistor i...

  • Arc fault detector with limiting of sensed signal to shape response characteristic and circuit breake

    Circuit Breaker Abstract An arc fault detector having a pulse generator generating a pulse each time an arc is struck includes a limiting amplifier which limits the amplitude of the pulses to discriminate against false trips from sizable singular eve...

  • Circuit breaker

    Circuit Breaker Abstract A circuit breaker comprising a switch for controlling the connection of a load to a power source, the switch having a fixed contact and a movable switch contact supported on a pivotable switching member and resiliently biased...

  • Circuit breaker with handle locking device

    Circuit Breaker Abstract The present invention provides an electrical switch locking assembly for inhibiting movement of a switch handle. The switch handle is enclosed in a casing or housing and moves operatively along a path between first and second...

  • Circuit breaker operating handle locking device

    Circuit Breaker Abstract A locking device is provided for use with a circuit breaker operating handle to selectively keep the handle locked and prevented from moving between ON and OFF positions. The locking device includes a support frame with at le...

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  • Total 68 pages, 1156 patent(s)