An electrostatic chuck has a substrate, an insulating layer disposed on the substrate for attracting a workpiece thereto, and an electrode interposed between the substrate and the insulating layer. The insulating layer having a volume resistivity .rho.(.OMEGA.m), a dielectric constant .epsilon..sub.r, and a thickness d (m), and being spaced from the workpiece which is attracted thereto by a gap having a distance .delta.(m). The volume resistivity .rho., the dielectric constant .epsilon..sub.r, t...

An electrostatic filter utilizes a series of parallel plates which are charged at differing potentials and separated by porous filter material to remove particulate matter from dielectric fluids. The filter includes a fluid tight housing which is constructed to include an easily removable filter cartridge comprised of a shell that conforms to the housing and includes the plate and porous filter elements. The housing further includes a quick disconnect end cap that includes an electrical connecti...

An electrostatic precipitator including an ionization unit for ionization to charge the oily dust particles in the air flowing therein at the front, a dust precipitating unit for catching the charged oil dust particles in the air flowing from the ionization unit thereinto at the front and out therefrom at the back by means of an electrostatic field produced from a plurality of large and small electric plates reversed in conductivity, a plurality of scrapers respectively mounted in between respec...

An electrostatic actuator according to the present invention includes a first member having a plurality of striped electrodes insulated from one another and arranged in a prescribed direction with a prescribed spacing between them, a second member having a plurality of striped electrodes insulated from one another and arranged in a prescribed direction with a prescribed spacing between them, and continuous-waveform polyphase AC power supplies applied to the electrodes of the first member and the...

An electrostatic separator unit comprises an arcuate feed plate, an arcuate screen co-axial with the feed plate, feed introduction means adapted to feed a mixture to be separated onto the feed plate for gravitational flow to the screen and an electrode above the screen. At least one of the feed plate, screen and feed introduction means is positionally adjustable rotationally about the common axis of feed plate and screen.

An electronic device includes a first member, and a second member which includes segments. At least one of the first member and the second member is movable relative to the other of the first member and the second member among a plurality of distinct positions as a result of differing voltage states of the segments.

An electrostatic actuator includes a stator that includes a stator-side electrode group including a plurality of electrodes, a mover that includes a mover-side electrode group including a plurality of electrodes and that can move in a predetermined movement direction, this plurality of electrodes opposing the electrodes in the stator-side electrode group, a guide instrument that guides the mover, and a driving signal supply unit that generates driving signals and applies the driving signals betw...

An electrostatic filter for separating particles suspended in air has an electrically conducting elongate separation tube and an elongate electrode within the tube connected to a high-voltage direct current source to produce an electric charge current from the electrode to the tube. The tube has air-inlet openings distributed over the surface thereof and is covered with a layer of air-permeable material. The layer of air-permeable material is dimensioned and said air-inlet openings are dimension...

A device for collecting a charge of static electricity by rotating a disc or wheel carrying a plurality of individual conductors in proximity to a pair of stationary conductors. Four stationary brushes are arranged in two pairs to wipe the charge from the individual conductors which is initially induced by the natural imbalance in static charge between the stationary and moving conductors. The charges from each pair of brushes are returned to the stationary conductors and stored on an appropriat...

An electrostatically driven microactuator is micromachined in a monolithic process. Sacrificial layers are placed between a moving element and stator structural layers. Removal of the sacrificial layers leaves a free standing moving element and micron wide air gaps within a stator. An electric field of about 100 Mv/m and higher is supported across the micron wide gap without breakdown and enables high energy torque densities to be produced between the stator and the moving element. One electrost...