A vacuum interrupter for a vacuum breaker, by which melting on contact surface caused by are concentration when a large current is broken and the arc can be rapidly extinguished by forming a strong magnetic field in vertical direction same as the arc when electrodes are separated, comprises: a vacuum container; a stationary cylinder electrode fixed on upper part of the vacuum container so as to be sealed; a movable cylinder electrode disposed on lower part of the vacuum container so as to be mov...

A mechanism for manifolding a vacuum force to separate surface sectors of a vacuum holddown uses subsurface ducting to apply the vacuum to separate subsurface vacuum plenums wherein each is fluidically coupled to a separate surface sectors. The plenum is segregated by a diaphragm into surface side and vacuum side cavities. Trigger ports and appropriate ducting through the holddown subjacent the surface associated with each sector determine how the vacuum is routed. Only when a trigger port is co...

A vacuum extractor mounted in an one-way valve in a lid of a container body of a vacuum container and adapted to extract air out of the vacuum container, including an extraction pump mounted in the one-way valve and driven to draw air away from the container body, a motor mounted in the lid, a reciprocating mechanism driven by the motor to reciprocate the extraction pump, causing it to draw air away from the container body, and a vacuum a detector mounted in the lid and adapted to detect the pre...

A vacuum pump capable of controlling a gas sucking performance is provided. A conductance variable mechanism (50) is arranged at an inlet port (16) formed inside a flange (11). The conductance variable mechanism (50) allows the area of a cross-section of the inlet port to be increased or decreased relative to the direction where gas is fed, so that an amount of gas to be sucked from the inlet port (16) can be controlled.

A vacuum pump and a vacuum apparatus are provided in which gas suction and discharge force can be adjusted without producing dust. The vacuum apparatus includes a vacuum pump 1 for sucking and discharging gas within a chamber 90. The vacuum pump 1 is provided with a communicating pipe 85 that pierces the casing for communicating between the outside of the apparatus and the rotor blades and the stator blades of the turbomolecular pump section. An inert gas is supplied to the turbomolecular pump s...

The invention provides both a vacuum combiner and vacuum conveyor for combining a plurality of lightweight containers arranged in a random order and width into a single row of containers, and moving the containers on a conveyor line to downstream workstations at high speed rates. The vacuum combiner includes one or more conveyor belt-type surfaces, while the vacuum conveyor has a single belt-type surface, all of which have openings defined therein. Both devices also have at least two guide rail ...

A suction inlet for a central vacuum system of a building includes a housing mounted on the floor of the building and defining a slot along the floor. The slot can be opened and closed and simultaneously a vacuum duct connected to the housing is opened and closed by a plug member. When the plug and the slot are opened, a switch actuates the central vacuum system to draw air into the housing through the slot across the floor so that dust, dirt and debris on the floor can simply be swept into the ...

A vacuum monitor for a vacuum interrupter which can detect poor vacuum pressure at high detection sensitivity from the outside of the interrupter, on the basis of the impulsive electromagnetic wave signals generated when vacuum pressure increases within the vacuum interrupter. The vacuum monitor according to the present invention comprises, in particular, a detector terminal of capacitor coupler type or inductor coupler type disposed near a high voltage conductor for receiving impulsive electrom...

A vacuum cleaner including an electric blower for generating suction air, a collecting unit for collecting dust contained in the suction air, a dust removing unit for removing dust adhered to the collecting unit, and a dust removing stop unit for stopping an operation of the dust removing unit. The dust removing stop unit stops the operation of the dust removing unit in response to a user's selection or an operation mode of the vacuum cleaner, thereby saving a power consumption of the dust remov...

A vacuum cleaner comprises a cleaner body where a dust separator is mounted to extract dust from dust-laden air. A dust receptacle is detachably mounted in the cleaner body. A locking unit locks the dust separator and the dust receptacle together. In an exemplary embodiment, an opening unit rotates the dust separator by a predetermined angle when the dust separator and the dust receptacle are unlocked.