A storage device includes a potential generator; and a compartment for determining a storage space formed around a discharging electrode of the potential generator. The potential generator includes a transformer that is composed of a primary coil and a secondary coil; a feedback control circuit that feeds back one terminal of the secondary coil to one terminal of the primary coil to adjust a voltage of the secondary coil; an output control portion that is provided on the other terminal of the secondary coil to impart a predetermined low frequency vibration to an output of the secondary coil which causes the discharging electrode physically vibrates; and the discharging electrode that is formed of a conductive material and provided on the other terminal of the secondary coil via the output control portion. A vibration frequency of the low frequency vibration applied is 40 Hz to 60 Hz which is determined by the output control portion.

A corona comprises a central electrode surrounded by an insulator, which is surrounded by a conductive component. The conductive component includes a shell and an intermediate part both formed of an electrically conductive material. The intermediate part is a layer of metal which brazes the insulator to the shell. An outer surface of the insulator presents a lower ledge, and the layer of metal can be applied to the insulator above the lower ledge prior to or after inserting the insulator into the shell. The conductive inner diameter is less than an insulator outer diameter directly below the lower ledge such the insulator thickness increases toward the electrode firing end. The insulator outer diameter is also typically less than the shell inner diameter so that the corona igniter can be forward-assembled.

A corona comprises a central electrode surrounded by an insulator, which is surrounded by a conductive component. The conductive component includes a shell and an intermediate part both formed of an electrically conductive material. The intermediate part is a layer of metal which brazes the insulator to the shell. An outer surface of the insulator presents a lower ledge, and the layer of metal can be applied to the insulator above the lower ledge prior to or after inserting the insulator into the shell. The conductive inner diameter is less than an insulator outer diameter directly below the lower ledge such the insulator thickness increases toward the electrode firing end. The insulator outer diameter is also typically less than the shell inner diameter so that the corona igniter can be forward-assembled.

A fan device including high voltage power source, conductive blade, first electrode and a resistance device is provided. Connecting side of the conductive blade is connected to first electric contact of the high voltage power source, and the conductive blade further includes a vibration side, wherein the conductive blade is extended from the connecting side to the vibration side along a first direction. The first electrode electrically connected to the second electric contact of the high voltage power source. The first electrode is disposed on a side of the vibration side of the conductive blade, and located in the vibrating range of the vibration side. The resistance device is connected between the conductive blade and the second electric contact in series.

A spray area in which a large number of droplets of a liquid sample sprayed from a spray nozzle is separated from the tip of a needle electrode for corona discharge by a sufficiently large distance, with a grid electrode facing the needle electrode placed in between. Ring electrodes for creating an electric field which drives primary ions that should react with the sample and generate sample-derived ions are provided within an ion chamber between the grid electrode and the spray area. Primary ions generated by corona discharge within the space between the needle electrode and the grid electrode pass through the opening of the grid electrode, reach the spray area under the effect of the electric field, and ionize sample components. Since the droplets are prevented from adhering to the needle electrode, the corona discharge is maintained in a stable state.

A corona igniter (20) includes a metal shell (32) with a corona reducing lip (38) spaced from an insulator (26) and being free of sharp edges (40) to prevent arcing (42) in a rollover region and concentrate the electrical field at an electrode firing end (48). The corona reducing lip (38) includes lip outer surfaces (88) being round, convex, concave, or curving continuously with smooth transitions (90) therebetween. The corona reducing lip (38) includes lip outer surfaces (88) presenting spherical lip radii (r.sub.l) being at least 0.004 inches. The corona igniter (20) also includes shell inner surfaces (104) and insulator outer surfaces (75) facing one another being free of sharp edges (40).

A corona igniter (20) includes a metal shell (32) with a corona reducing lip (38) spaced from an insulator (26) and being free of sharp edges (40) to prevent arcing (42) in a rollover region and concentrate the electrical field at an electrode firing end (48). The corona reducing lip (38) includes lip outer surfaces (88) being round, convex, concave, or curving continuously with smooth transitions (90) therebetween. The corona reducing lip (38) includes lip outer surfaces (88) presenting spherical lip radii (r.sub.l) being at least 0.004 inches. The corona igniter (20) also includes shell inner surfaces (104) and insulator outer surfaces (75) facing one another being free of sharp edges (40).

A vehicular static eliminating device includes: a negative ion generating device; and a guide device configured to guide negative ions and release the negative ions from an emission port to a static elimination target spot which is positively charged, the guide device including: a guide member defining a passage through which to guide the negative ions, the guide member being made of a resin which is easily negatively charged in a triboelectric series; and a tip-shaped part configured to discharge, by corona discharge, negative electric charges, which have accumulated on the guide member, to the static elimination target spot, the tip-shaped part being provided in a part defining the emission port and in proximity to the static elimination target spot.

A vehicular static eliminating device includes: a negative ion generating device; and a guide device configured to guide negative ions and release the negative ions from an emission port to a static elimination target spot which is positively charged, the guide device including: a guide member defining a passage through which to guide the negative ions, the guide member being made of a resin which is easily negatively charged in a triboelectric series; and a tip-shaped part configured to discharge, by corona discharge, negative electric charges, which have accumulated on the guide member, to the static elimination target spot, the tip-shaped part being provided in a part defining the emission port and in proximity to the static elimination target spot.

An air cleaner includes a rear filter receiving air from the outer environment, an ionizer grid connected to a high voltage power supply and having wires extending between opposite sides of a frame such to emit positively charged ions and apply an electrostatic charge on the air received from the rear filter; a collector grid connected to ground and having wires extending between opposite sides of a frame, the combination of the ionizer and collector grids causing the air to move toward the collector grid; a front filter collecting contaminants suspended in the air received from the collector grid; and an apparatus frame housing the rear filter, the ionizer and collector grids, and the front filter, wherein the frames of the ionizer and collector grids are suspended within the apparatus frame with isolating members made of a non-arc tracking material, such to minimize coronal discharge and reduce audible noise.