In apparatus for generating and applying ionic charges to a web of film or the like operating in an explosive atmosphere of solvent vapor comprising an ionizer, a source of electrical energy connected to the ionizer, and means for supplying a stream of gas to the ionizer, the improvement comprising an air motor driving an electrical generator for supplying energy to the ionizer, and a single source of air under pressure connected both to the air motor and to the ionizer. Upon failure of air supp...

An ionizing wiper for removing static charge from an insulative surface. The wiper is made of wiping material with a high density of ionizing points being disposed along the surface of the wiper such that the air between the ionizing points and an object is sufficiently ionized to remove static charge from the object.

An ionizing rod comprising a core having an outer surface with a plurality of ionizing points disposed along the outer surface of the core. The plurality of ionizing points are sufficiently dense upon the core surface such that air between the plurality of ionizing points and an object is sufficiently ionized to remove static charge from the object. The core material can be electrically conductive, insulative, or static dissipative. The methods to attach the ionizing points to the core include a...

Ion source for use in an ion pump or other apparatus, comprising a secondary-emissive cylinder accommodating a grid. A high-frequency voltage is applied between these two electrodes so that the transit time of the diametrically moving electrons is one whole period or a multiple thereof.

Conducting plates of opposite electrical potential are alternately disposed and spaced apart and immersed in a dielectric fluid in a chamber. Gas is supplied to the bottom of the chamber and passes through the fluid and over the plates. A partial vacuum is maintained in the region above the surface of the dielectric, from which the gas is extracted.

In an air ionizing apparatus of a type utilizing a sheath gas not containing water (hydrogen) or impurities to sheathe corona electrodes, sufficient amount of ions are generated to fully eliminate static electricity from the interior of a production environment such as a clean room and to prevent the impurities from depositing on the corona electrodes. The tips of corona electrodes 21a and 21b are positioned inwardly of the tips of sheath gas nozzles 4a and 4b, respectively, by a certain distanc...

A hair dryer is provided with a high voltage generator which produces a negative DC voltage output of at least about 6 kilovolts for reducing static charges on a person's hair during hair drying. The generator can be mounted adjacent the dryer air inlet of the hair dryer housing to cool the generator with cooling air, or the generator can be mounted externally of the dryer to reduce dryer weight.

An air filter assembly includes an ion source positioned adjacent to the front face of an air filter to inject ions into the arriving air flow. The ions penetrate upstream sufficiently far to have ionized the air and charge particles before their arrival at the filter trapping medium. The ion source is preferably sufficiently thin as to allow the filter with the ion source mounted thereon to be inserted into a filter slot in a duct of an air handling unit.

An ionizing radiation detector comprises a flat substrate having a plurality of etched parallel ridges on one surface. The parallel sides of the ridges carry a thin layer of a conducting material, acting as an electrode. A particle or radiation beam to be detected impinges on the ridges, in a direction normal to the plane of the substrate, so causing electron/hole carriers production within the ridges. The carriers migrate to the electrodes, in a direction perpendicular to the beam, thereby indu...

The present invention provides a scintillation counter that includes a measuring chamber accommodated to take the sample and viewed by two photodetectors, preferably photomultipliers, that can be operated in coincidence. Associated with the chamber is an additional scintillator, preferably an inorganic crystal scintillator, optically isolated from the chamber by a light-permeable wall and mounted so that the scintillation light generated in the additional scintillator is guided predominantly onl...