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| Number | Title | Issue Date |
| 7236071 | Medium voltage vacuum contactor A medium voltage vacuum contactor comprising for each pole, a vacuum envelope which contains a fixed contact and a corresponding movable contact; and actuating means providing the energy required to move the movable contacts, characterized in that said actuating mea... | 06/26/2007 |
| 7148677 | Vacuum circuit interrupter including circuit monitoring leakage or loss of vacuum and method of monitoring a vacuum interrupter for leakage or loss of vacuum A method monitors a vacuum interrupter for leakage or loss of vacuum. The vacuum interrupter includes a line side, a load side and separable contacts electrically connected therebetween. The line side has a line side voltage and the load side has a load side voltage... | 12/12/2006 |
| 7038157 | Vacuum circuit breaker with coaxial coil for generating an axial magnetic field in the vicinity of the contact members of the circuit breaker Vacuum circuit breaker, provided with a casing, in which a fixed and movable contact member are each attached to a supporting contact rod and supported therein in a mutually electrically isolated manner, and a coil coaxial to the casing and surrounding the contact m... | 05/02/2006 |
| 6580345 | Switching device A switching device includes a movable coil which is reinforced by a stiffener to increase the resistance of the movable coil to bending moments. The stiffener may include a nonmagnetic case which surrounds the movable coil. Alternatively or in addition, i... | 06/17/2003 |
| 6414257 | Gas-insulated circuit-breaker with an integrated electronic current transformer The single-phase circuit-breaker comprises at least one interrupting chamber formed by an insulating tube filled with an insulation gas, and it comprises at least one current transformer whose secondary is disposed in air around the primary at one end of ... | 07/02/2002 |
| 6353376 | Switching assembly A switching assembly includes a switch portion having a fixed electrode and a movable electrode which are separable, a movable portion secured between a movable shaft connected to the movable electrode and a movable coil by a magnetic body, and a fixed po... | 03/05/2002 |
| 5861597 | Vacuum electrical switch A vacuum switch has an elongated vacuum cartridge with a cylindrical enclosure blanked off by two end-plates, in which there are housed two arcing contacts respectively stationary and movable, and a coil designed to produce an axial magnetic field in the ... | 01/19/1999 |
| 4975552 | Vacuum switch A vacuum switch which has a housing for a vacuum chamber. The housing includes a metal cylinder and an insulating cylinder axially aligned and hermetically sealed at adjacent ends, and closed at opposite ends by end walls. A stationary electrode and a mov... | 12/04/1990 |
| 4847456 | Vacuum circuit interrupter with axial magnetic arc transfer mechanism A vacuum circuit interrupter characterized by an evacuated housing containing a pair of separable electrical contacts which can generate an arc when separated to an open position. An electromagnetic structure for diffusing the arc radially from between th... | 07/11/1989 |
| 4661665 | Vacuum interrupter and method of modifying a vacuum interrupter A vacuum interrupter includes an evacuated envelope and a pair of facing contacts situated therein. The contacts are relatively movable along a first axis from an engaged position to a disengaged position. Conductors extending through the envelope are pro... | 04/28/1987 |
| 4319296 | Series connected oscillating transverse field interrupter and method The invention provides a technique for interrupting current employing a plurality of series connected vacuum arcs in parallel with a resonating circuit. At least one of the series vacuum arcs is subjected to an oscillating transverse magnetic field which ... | 03/09/1982 |
| 4306128 | Vacuum circuit interrupter The invention disclosed a vacuum type electric circuit interrupter comprising a highly evacuated envelope which includes at least one metallic tube made of the magnetic material or the ferromagnetic material, a pair of relatively movable contacts disposed... | 12/15/1981 |
| 4276455 | Vacuum envelope for current limiter An improved envelope for a vacuum device circuit interrupter of the type having a pair of relatively movable electrodes within a vacuum envelope and including magnetic field arc suppression. The envelope includes end portions which support the electrodes ... | 06/30/1981 |
| 4267415 | Current limiter vacuum envelope An improved envelope for a vacuum-type current interrupter of the type having a pair of relatively movable electrodes. The envelope includes end portions which support the electrodes and an intermediate insulating portion which surrounds and is spaced fro... | 05/12/1981 |
| 4250364 | Vacuum arc current limiter with oscillating transverse magnetic field and method A vacuum arc current interruption device is installed in a current limiting circuit which includes a parallel resonant circuit. Means are provided for producing transverse lines of magnetic force in the arc gap between the electrodes in the vacuum enclosu... | 02/10/1981 |
| 4215255 | Vacuum arc switching device with internal shielding A vacuum arc current switching device employs a shielding arrangement including a plurality of coaxially disposed cylindrical non-conducting members for minimizing exposure of the interior wall surfaces of the enclosure to vapor deposition of cathode mate... | 07/29/1980 |
| 4130782 | High voltage d-c vacuum interrupter device with magnetic control of interrupter impedance A high voltage interrupter consists of a cathode disposed centrally along the axis of an annular anode ring. The anode ring is a part of the wall of an evacuated container and is enclosed by a magnetic coil. Current flows through an arc plasma struck betw... | 12/19/1978 |
| 4130781 | High voltage d-c vacuum interrupter device with magnetic control of interrupter impedance with movable contact A circuit interrupter which can be used as a high voltage d-c breaker or fault current limiter transfer switch or the like contains a pair of cooperable contacts disposed in an evacuated container. One of the contacts also serves as the cathode of a magne... | 12/19/1978 |
