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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7038387 | Pulse magnetron with different anode and cathode radiuses A pulse magnetron includes a cylindrical shell anode, a cathode provided at the center of the anode having a number of vanes mounted radially on an inner wall of the cylindrical anode shell, and a pair of pole pieces provided for applying a magnetic field to an inte... | 05/02/2006 |
| 6936145 | Coating method and apparatus A method and apparatus used for the application of plating/coating in a cathodic arc process to improve coating uniformity, deposition rates, quality, cost, packaging, arc triggering, target wear and other improvements is described in the patent. The process improve... | 08/30/2005 |
| 5828176 | Planar crossed-field plasma switch and method A cold-cathode, crossed field switch has a magnet system which generates a magnetic field that is radially-oriented about a switch axis and a planar electrode system which generates an axially-oriented electric field. These structures facilitate a switch ... | 10/27/1998 |
| 5589726 | Arc lamp with external magnetic means The present invention provides an arc lamp for producing a high intensity point source of light by magnetically compressing the light emitting element of the arc lamp. Arc lamp point light source 30 includes bulb 32 having two electrode 34, 36 spaced apar... | 12/31/1996 |
| 5568053 | Ionization gauge having a non-time varying magnetic field generator of separated opposed magnets A cold cathode ionization gauge includes a first and second electrode spaced apart and insulated from one another and having a common axis. A magnetic field generator surrounds the gauge and applies a non-time varying magnetic field along the common axis ... | 10/22/1996 |
| 5468363 | Magnetic-cusp, cathodic-arc source A magnetic-cusp for a cathodic-arc source wherein the arc is confined to the desired cathode surface, provides a current path for electrons from the cathode to the anode, and utilizes electric and magnetic fields to guide ions from the cathode to a point ... | 11/21/1995 |
| 5461282 | Advanced center post electron gun An advanced center post (ACP) gun is provided which is capable of producing either a large orbit or small orbit electron beam. The gun comprises an annular shaped cathode, a control electrode adjacent the cathode, and an annular anode having an opening th... | 10/24/1995 |
| 5282944 | Ion source based on the cathodic arc A cylindrically symmetric arc source to produce a ring of ions which leave the surface of the arc target radially and are reflected by electrostatic fields present in the source to a point of use, such as a part to be coated. An array of electrically isol... | 02/01/1994 |
| 5279723 | Filtered cathodic arc source A continuous, cathodic arc ion source coupled to a macro-particle filter capable of separation or elimination of macro-particles from the ion flux produced by cathodic arc discharge. The ion source employs an axial magnetic field on a cathode (target) hav... | 01/18/1994 |
| 5048068 | Magnetically operated pulser A diode pulser is described which comprises a diode and an inductor connected in series, the impedance of the diode being controllable to suddenly increase the impedance to produce a high voltage pulse across the diode. The diode can include a pair of spa... | 09/10/1991 |
| 4925306 | Ion bombardment furnace for atomic spectroscopy A magnetron glow discharge plasma device is utilized as a furnace for vaporization, atomization and excitation of analytical solution samples of trace elements for atomic emission spectroscopy. The apparatus includes a sample deposited on the glow dischar... | 05/15/1990 |
| 4912738 | Magnetically energized pulser A diode pulser is described which comprises a diode and an inductor connected in series, the impedance of the diode being controllable to suddenly increase the impedance to produce a high voltage pulse across the diode. The diode includes concentric elect... | 03/27/1990 |
| 4896073 | Discharge tubes A discharge tube arrangement, for example, a thyratron, in accordance with the invention has a first electrode arranged co-axially about a second electrode. Thus, in a thyratron, the anode may surround the cathode or vice versa. The envelope may be tubula... | 01/23/1990 |
| 4835438 | Source of spin polarized electrons using an emissive micropoint cathode Spin polarized electron source using an emissive micropoint cathode. At least one portion of each micropoint, including the top of the latter, is ferromagnetic, so that the electrons emitted by the cathode are spin polarized in a given direction, when the... | 05/30/1989 |
| 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 |
| 4812715 | Current-level triggered plasma-opening switch An opening switch for very high power electrical pulses uses a slow magnetic field to confine a plasma across a gap between two electrodes. The plasma conducts the electric pulse across the gap while the switch is closed. A magnetic field generated by the... | 03/14/1989 |
| 4755999 | Laser apparatus utilizing a magnetically enhanced electrical discharge In laser apparatus, an amplification section of a laser apparatus, including a cavity bounded by first and second opposing surfaces, closely spaced relative to the dimensions of the surfaces, electrodes for generating an electric field within the cavity a... | 07/05/1988 |
| 4727298 | Triggered plasma opening switch A triggerable opening switch for a very high voltage and current pulse includes a transmission line extending from a source to a load and having an intermediate switch section including a plasma for conducting electrons between transmission line conductor... | 02/23/1988 |
| 4604752 | Magnetic stabilization of high power glow discharges The invention provides a novel means of stabilizing a glow discharge device against electrothermal instabilities and electrode induced instabilities comprising imposing a magnetic field on the discharge current to create a sheared flow system within the d... | 08/05/1986 |
| 4600489 | Method and apparatus for evaporation arc stabilization for non-permeable targets utilizing permeable stop ring Apparatus and method for evaporation arc stabilization including a target having a surface of material of non-permeable material to be evaporated; circuitry for establishing an arc on the target surface for evaporating the target material, the arc being c... | 07/15/1986 |
| 4547693 | Re-entrant cathode support An electron tube having a cathode and an anode with the anode subtantially surrounding the cathode and providing an electron-interaction space therebetween for providing a magnetic field having a substantial component oriented in the axial direction trave... | 10/15/1985 |
| 4501990 | Electron tube, especially transmitting tube, with a device for eliminating interfering retarding-field effects Electron tube assemble having coaxial electrodes and grids, including a tube with given electrode trajectories and oscillation period, and interfering retarding-field effect elimination means disposed around the tube for generating a magnetic field having... | 02/26/1985 |
| 4071801 | Crossed-field switch device and method for off-switching For off-switching, the magnetic field in a crossed-field switch device is modified by a localized auxiliary field to terminate the previously continuous closed electron path in the interelectrode space to terminate cascading ionization. The auxiliary fiel... | 01/31/1978 |
| 3984725 | Permanent magnet structure for crossed-field tubes A permanent magnet structure particularly beneficial for generating the interaction field in coaxial, crossed field electron tubes is designed such that the normal iron flux return path is not required. Substantial reduction in weight results. A further b... | 10/05/1976 |
| 3963960 | Bipolar crossed-field switch tube and circuit Cross-field switch tube has three electrodes to define two concentric annular inter-electrode spaces. A magnet produces a field in both spaces, which field extends out of the switch tube through the electrodes. Circuit connects electrodes so that, with on... | 06/15/1976 |
| 3949260 | Continuous ionization injector for low pressure gas discharge device Plasma chamber maintained ionized by thin wire discharge continuously supplies ionized plasma into the interelectrode space of a low pressure gas discharge device such as a crossed-field switch tube to eliminate dependence on statistical electrons for ini... | 04/06/1976 |
| 3947342 | Method of forming a composite electrode Composite electrodes for a crossed-field switch device is formed by positioning a refractory metal structure substantially at the location of its first electrode, sputtering metal from the refractory metal structure onto the second electrode so that the s... | 03/30/1976 |
