Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7405411 | Ion source with multi-piece outer cathode In certain example embodiments of this invention, there is provided an ion source including an anode and a cathode. In certain example embodiments, a multi-piece outer cathode is provided. The multi-piece outer cathode allows precision adjustments to be made, thereb... | 07/29/2008 |
| 7180230 | RF induction lamp with reduced electromagnetic interference An electrodeless fluorescent lamp 10 has an envelope 12 that includes a chamber 14. A core 16 of magnetic material, preferably ferrite, is positioned in the chamber 14 and has a first winding 18 surrounding the core and havi... | 02/20/2007 |
| 6949887 | High frequency inductive lamp and power oscillator An oscillator includes an amplifier having an input and an output, a feedback network connected between the input of the amplifier and the output of the amplifier, the feedback network being configured to provide suitable positive feedback from the output of the amp... | 09/27/2005 |
| 6002204 | Display device A display device comprises a cathode means for emitting electrons and a permanent magnet having a two dimensional array of channels extending between opposite poles of the magnet. The magnet generates, in each channel, a magnetic field for forming electro... | 12/14/1999 |
| 5866991 | Induction lamp with oppositely oriented coil winding layers An electrodeless gas discharge lamp includes a vitreous envelope containing a discharge medium. An excitation coil is positioned in relation to the vitreous envelope so as to excite the discharge medium therein. The excitation coil is adapted to be driven... | 02/02/1999 |
| 5646476 | Channel ion source A gas ionizable to produce a plasma is introduced into a channel within an ion source and into a hollow cathode embedded within the same ion source. A combined anode and manifold is located at a closed end of the channel and gas is introduced into the cha... | 07/08/1997 |
| 4992696 | Apparatus having reduced mechanical forces for supporting high magnetic fields The present invention identifies several configurations of conducting elements capable of supporting extremely high magnetic fields suitable for plasma confinement, wherein forces experienced by the conducting elements are significantly reduced over those... | 02/12/1991 |
| 4968915 | Magnetic field generating assembly A cyclotron includes a magnetic field generating assembly defined by a pair of main, superconducting coils mounted about the axis of the cyclotron on a former. The coils are surrounded by an ion shield positioned within a cryostat. Radially outwardly of t... | 11/06/1990 |
| 4954748 | Thyratron gas discharge device with magnetic field for improved ionization In a thyratron gas discharge device, magnetic material is located coaxially with the anode to produce a magnetic field between the anode and cathode which is substantially parallel to a discharge established between them. This causes electrons emitted fro... | 09/04/1990 |
| 4871947 | Apparatus for automatically correcting arc position of high pressure discharge lamp Disclosed is an apparatus for stabilizing the light output of a high pressure discharge lamp comprising a coil generating a magnetic field acting upon the arc of the high pressure discharge lamp, an arc position detector detecting deviation of the positio... | 10/03/1989 |
| 4740758 | Apparatus for generating a magnetic field in a volume having bodies influencing the field pattern Apparatus for generating a magnetic field having a spatially predetermined field pattern in a useful volume, where bodies of ferro-magnetic material influencing the field pattern are disposed in the useful volume. To assure a spatially predetermined field... | 04/26/1988 |
| 4734621 | Device for producing a sliding or traveling magnetic field, in particular for ionic processing under magnetic field Device for producing a sliding or traveling magnetic field, with a substantially constant modulus in a working region (11a), using movable permanent magnets, these permanent magnets forming cylindrical bars (1) with diametrical or radial magnetization, wi... | 03/29/1988 |
| 4516050 | Ion chamber for electron-bombardment ion sources A multipole electron-bombardment type ion source includes an ion chamber defined by chamber walls and magnetic elements of an electrically insulating, permanently magnetized material. The magnetic elements provide mechanical support for anode elements and... | 05/07/1985 |
| 4486805 | Lightning arrester with improved spark gap structure An improved arc gap structure for a lightning arrester comprises first and second annular electrodes concentrically arranged relative to one another. The first electrode has a generally cylindrical inner surface which tapers to a smaller diameter toward o... | 12/04/1984 |
| 4307317 | Bipolar crossed-field device including electromagnetic coils of the same polarity Bipolar crossed-field device 10 has outer electrode 12 and inner electrode 18 which define interelectrode space 16. Magnetic field coils 46, 48 operate together to form a magnetic field in the interelectrode space 16 shaped to trap electrons for cascading... | 12/22/1981 |
| 4075528 | Xenon lamp with magnets on the electrodes A xenon lamp containing open ring-shaped magnets mounted inside the tube of the lamp between the discharge portion of an electrode and the portion of the electrode sealed in the end of said tube, whereby the metallic vapor and other volatilized matters du... | 02/21/1978 |
| 4075529 | Xenon lamp containing magnetic adsorbers inside the tube thereof A xenon lamp containing magnet adsorbers, each of the magnet adsorbers having pieces of magnetic material which are dispersed in a ring-shaped, heat-resisting, electric insulating plate and being mounted between the discharge portion of an electrode insid... | 02/21/1978 |
| 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 |
| 4064418 | Controlled arc stream in high intensity discharge lamps A discharge lamp with minimized upward bowing of the arc in which conductors carrying full arc current are placed in close proximity above and below the arc tube. The conductors run parallel with the longitudinal axis of the arc tube and the conductors ab... | 12/20/1977 |
| 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 |
| 3969646 | Electron-bombardment ion source including segmented anode of electrically conductive, magnetic material An electron-bombardment ion source has a chamber into which an ionizable propellant is introduced. Electrons flowing from a cathode to an anode serve to ionize the propellant. The resulting ions are accelerated out of the chamber. To increase the efficien... | 07/13/1976 |
