摘要:
A compact ionization source includes first and second electrodes, each having a plurality of fingers that are interdigitated with each other. The spacing between the first and second electrode, preferably less than 1 mm, creates a large electric field when a potential is applied across the first and second electrodes. The large electric field creates an ionization volume between the fingers of the first and second electrode and ionizes a portion of the molecules occupying the ionization volume. The interdigitated fingers of the first and second electrodes allow for a narrow gap separating the electrodes while presenting a large flow area for ionizing molecules for downstream analysis.
摘要:
Excimers are formed in a gas (30,130) by applying a pulsed potential between a first electrode (14,114) and a counter electrode (26, 126) so that corona discharge occurs, substantially without arcing, when the potential is on. The pulses or on-times of the potential desirably are about 100 microseconds or less. Use of a pulsed potential provides greater efficiency than a constant potential. Where the excimer-forming gas is a pure inert gas, the gas desirably contains less than 10 ppm water vapor.
摘要:
Electrostatic printing processes utilize corona-charging units. When those units wear out or become faulty, they need to be replaced. This embodiment provides a tool that can be used to remove a faulty electrode wire assembly from the unit. This same tool when loaded with a new wire assembly can insert a new wire assembly into the emptied corona charging unit, sometimes referred to as a dicorotron unit. The tool, therefore, is used both to remove or insert a wire assembly from or into a dicorotron unit.
摘要:
A device for handling a fluid includes a corona discharge device and an electric power supply. The corona discharge device includes at least one corona discharge electrode and at least one collector electrode positioned proximate each other so as to provide a total inter-electrode capacitance within a predetermined range. The electric power supply is connected to supply an electric power signal to said corona discharge and collector electrodes so as to cause a corona current to flow between the corona discharge and collector electrodes. An amplitude of an alternating component of the voltage of the electric power signal generated is no greater than one-tenth that of an amplitude of a constant component of the voltage of the electric power signal. The alternating component of the voltage is of such amplitude and frequency that a ratio of an amplitude of the alternating component of the highest harmonic of the voltage divided by an amplitude of the constant component of said voltage being considerably less than that of a ratio of an amplitude of the highest harmonic of the alternating component of the corona current divided by an amplitude of the constant component of the corona current, i.e., (Vac/Vdc)≦(Iac/Idc).
摘要翻译:用于处理流体的装置包括电晕放电装置和电源。 电晕放电装置包括至少一个电晕放电电极和至少一个彼此靠近的集电极,以便在预定范围内提供总的电极间电容。 电源被连接以向所述电晕放电和集电极施加电力信号,以使电晕电流在电晕放电与集电极之间流动。 产生的电力信号的电压的交变分量的振幅不大于电力信号的电压的恒定分量的振幅的十分之一。 电压的交变分量具有这样的幅度和频率,使得电压的最高谐波的交变分量的幅度除以所述电压的恒定分量的幅度的比率远小于 将电晕电流的交变分量的最高谐波的振幅除以电晕电流的恒定分量的振幅,即(V / AC / DC DC) =(I SUB> / I SUB>)。
摘要:
An electrostatic fluid accelerator having a multiplicity of closely spaced corona electrodes. The close spacing of such corona electrodes is obtainable because such corona electrodes are isolated from one another with exciting electrodes. Either the exciting electrode must be placed asymmetrically between adjacent corona electrodes or an accelerating electrode must be employed. The accelerating electrode can be either an attracting or a repelling electrode. Preferably, the voltage between the corona electrodes and the exciting electrodes is maintained between the corona onset voltage and the breakdown voltage with a flexible top high-voltage power supply. Optionally, however, the voltage between the corona electrodes and the exciting electrodes can be varied, even outside the range between the corona onset voltage and the breakdown voltage, in to vary the flow of fluid. And, to achieve the greatest flow of fluid, multiple stages of the individual Electrostatic Fluid Accelerator are utilized with a collecting electrode between successive stages in order to preclude substantially all ions and other electrically charged particles from passing to the next stage, where they would tend to be repelled and thereby impair the movement of the fluid. Finally, constructing the exciting electrode in the form of a plate that extends downstream with respect to the desired direction of fluid flow also assures that more ions and, consequently, more fluid particles flow downstream.
摘要:
A wire tensioning mechanism for tensioning a wire having an end one and an end two in a machine in which the wire has a means for attachment on end two and is fixed to the machine at end one, comprises a slide block, and a spring.The slide block is slidably mounted to the machine at end two of the wire, such that the slide block slides parallel to the wire. The slide block has a slot which is wider than the wire but narrower than the means for attachment, such that when the slide block is mounted on the machine, the wire end two can be slid into the slot such that pulling the slide block in the direction away from the wire forces the means for attachment against the slot, but does not allow the means for attachment to pass through. The slot is lined up with the wire such that when the wire is in tension, there are no side loads on the means for attachment.
摘要:
A discharge wire usable in an electrification device includes a tungsten wire subjected to mirror finish processing and an oxidized layer formed by heating the surface of the tungsten wire at a temperature in the range 400 to 600null C., wherein the film has a thickness in the range of 0.01 to 0.3 nullm.
摘要:
An electrostatic fluid accelerator having a multiplicity of closely spaced corona electrodes. The close spacing of such corona electrodes is obtainable because such corona electrodes are isolated from one another with exciting electrodes. Either the exciting electrode must be placed asymmetrically between adjacent corona electrodes or an accelerating electrode must be employed. The accelerating electrode can be either an attracting or a repelling electrode. Preferably, the voltage between the corona electrodes and the exciting electrodes is maintained between the corona onset voltage and the breakdown voltage with a flexible top high-voltage power supply. Optionally, however, the voltage between the corona electrodes and the exciting electrodes can be varied, even outside the range between the corona onset voltage and the breakdown voltage, in to vary the flow of fluid. And, to achieve the greatest flow of fluid, multiple stages of the individual Electrostatic Fluid Accelerator are utilized with a collecting electrode between successive stages in order to preclude substantially all ions and other electrically charged particles from passing to the next stage, where they would tend to be repelled and thereby impair the movement of the fluid. Finally, constructing the exciting electrode in the form of a plate that extends downstream with respect to the desired direction of fluid flow also assures that more ions and, consequently, more fluid particles flow downstream.
摘要:
A corona treatment system (10d) has a corona treatment generator (11d), a first stationary electrode (12d) having a dielectric layer (18d) disposed thereon and a second roller electrode (13d) spaced from the first stationary electrode (12d) by a gap (15d). The second roller electrode (13d) has a layer of dielectric material (19d) disposed around a core (23d) and has a conductive layer (24d) disposed over a substantial portion of a length of the second roller (13d). A switch (20) is electrically connected between the conductive layer (24d) and an electrical ground, and the switch (20) is operable to switch the system between a grounded web mode and a dual dielectric mode.
摘要:
Apparatus (10,10') for electric-discharge texturing of a round surface (12) of a roll (14) includes a bank of electrode positioners (32) mounted on a carriage supported housing (30) in axial rows (34) and circumferential columns (36) with the axial rows diverging from a central axis A of roll rotation and with the axial rows symmetrically located on opposite sides of an adjustment axis B along which the electrode positioners are moved by the housing. The adjustment axis B of the housing (30) is inclined upwardly away from the central axis A. The electrode positioners (32) can be provided in an odd number or an even number of axial rows (34) and, in either case, the circumferential columns (36) of the electrode positioners (32) are slightly axially inclined along the central axis A.