Class 313/162 - Three or more electrodes

Subclass of Class 313 - Electric lamp and discharge devices
Definition: Subject matter where the lamp or discharge device has three
No. of patents: 19
Last issue date: 08/21/2007

Number	Title	Issue Date
7259378	Closed drift ion source A closed drift ion source which includes a channel having an open end, a closed end, and an input port for an ionizable gas. A first magnetic pole is disposed on the open end of the channel and extends therefrom in a first direction. A second magnetic pole disposed ...	08/21/2007
5994850	Switching arrangements wherein a cylindrical trigger electrode is arranged around a gap between an anode and cathode for establishing a discharge therebetween A switch for switching large currents and large charges includes an anode separated from a cathode with a cylindrical trigger electrode located around the anode and the gap. The cathode is of a metal such as zinc, cadmium, tin or magnesium. During operati...	11/30/1999
5814943	Direct current regulation plasma device A gas discharge tube for regulating the flow of high power direct current, and a method for its use. The tube is provided with pairs of secondary electrodes flanking the current path from the anode to the cathode, and with solenoids for generating a magne...	09/29/1998
5608297	Plasma switch and switching method with fault current interruption A plasma switch is provided which can limit fault currents to a range that is elecrostatically interruptible by a control grid. The switch includes magnets that generate a first magnetic vector which cooperates with an electric field to generate a plasma,...	03/04/1997
5019752	Plasma switch with chrome, perturbated cold cathode A plasma switch employs a cold cathode which yields secondary electrons to sustain a plasma within the switch. The cathode is provided with a series of perturbations which increase the effective cathode surface area exposed to the plasma and increase the ...	05/28/1991
4833363	Ignitron with arc-centering magnetic field An ignitron device is provided in which a permanent annular magnet at least partly surrounds the region between the ignitron anode and the surface of a mercury pool connected to the cathode terminal, the magnet being effective to create an axial magnetic ...	05/23/1989
4752667	Apparatus and particularly duoplasmatron usable for ionizing a gas and process for using said apparatus The invention relates to an apparatus usable for ionizing a gas comprising a cathode serving as a hot or cold cathode and to a process for using this apparatus. The apparatus includes a facing cathode and anode, the gas to be ionized successively traversi...	06/21/1988
4367427	Glow discharge lamp for qualitative and quantitative spectrum analysis A glow discharge lamp for qualitative and quantitative spectrum analysis having a discharge chamber closable on the cathode side by an electrically conductive disk at cathodic potential in which, to increase the luminous intensity and the accuracy of the ...	01/04/1983
4362972	Thyratrons It is desirable not only to switch between circuits or circuit elements carrying relatively large currents but also to effect the switch-over operation extremely rapidly. Conventional thyratrons can be used to switch on the current, but they cannot easily...	12/07/1982
4339684	Electron multiplier tube with axial magnetic field Electron multiplier tube, comprising along the principal axis an electron-emitting surface, several dynode stages with distributed structure, capable of reflux secondary electron emission, and an electron-receiving surface, as well as means producing an ...	07/13/1982
4247804	Cold cathode discharge device with grid control A cross-field discharge plasma is used to supply charge carriers for a grid controlled cold cathode discharge device. A dc magnetic field is employed to sustain the crossed-field discharge when the source grid is active. The device comprises an anode, a c...	01/27/1981
4130782	High voltage d-c vacuum interrupter device with magnetic control of interrupter impedance A high voltage interrupter consists of a cathode disposed centrally along the axis of an annular anode ring. The anode ring is a part of the wall of an evacuated container and is enclosed by a magnetic coil. Current flows through an arc plasma struck betw...	12/19/1978
4130781	High voltage d-c vacuum interrupter device with magnetic control of interrupter impedance with movable contact A circuit interrupter which can be used as a high voltage d-c breaker or fault current limiter transfer switch or the like contains a pair of cooperable contacts disposed in an evacuated container. One of the contacts also serves as the cathode of a magne...	12/19/1978
4123686	Ion generating source A source for generating singly and/or multiply charged ions composed essentially of a glow cathode, an intermediate electrode and an anode electrode having a common axis of symmetry and bordering a gas discharge chamber and each presenting a passage openi...	10/31/1978
4088929	Electric circuit interrupting devices A circuit interrupting device for providing protection against surge currents is constructed to operate very rapidly. A surge current generates a magnetic field in coils which deflects an electron beam which normally travels from a cathode to an anode to ...	05/09/1978
4034260	Gridded crossed-field tube and ignition method In addition to the anode and cathode electrodes which define a low pressure gas filled main gap therebetween and a magnetic field to lengthen the electron path, the crossed-field switch device has a control electrode defining a second gas filled control g...	07/05/1977
4034261	Gridded crossed-field tube Three electrodes define two gaps in the crossed-field tube so that while one gap is holding off high voltage the other can be ignited to turn the tube on with high voltage applied. The three electrodes act as anode, cathode and control electrodes and defi...	07/05/1977
4007392	Magnetic well for plasma confinement A multipole magnetic well for plasma confinement includes a plurality of current-carrying coils placed on planes corresponding to the facets of a regular polyhedron that can be symmetrically circumscribed about a sphere. The direction of current in the co...	02/08/1977
3989975	Ion bombardment apparatus An apparatus with an increased efficiency, for ion bombardment machining operations at voltages not exceeding some few thousands of volts, is provided. It comprises an ion source whose plasma is extracted across grids forming cylinders of revolution about...	11/02/1976

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Class 313/162 - Three or more electrodes