Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 7354021 | Magnet for an ionic drive for space vehicles A toroidally shaped magnetic device with distortion-free exit and access ports provides toroidal magnetic ionic drive systems for vehicles that achieve a more operationally efficient, uniform and stronger radial magnetic field. This is accomplished by magnetizing a ... | 04/08/2008 |
| 7348569 | Acceleration of charged particles using spatially and temporally shaped electromagnetic radiation A method and apparatus for accelerating charged particles are disclosed, wherein the method comprises using at least a transverse component of a temporally and spatially shaped electromagnetic field to accelerate one or more charged particles. ... | 03/25/2008 |
| 7342230 | Terahertz imaging system and associated method A terahertz imaging system uses a terahertz light source to illuminate a target object with a series of short pulses of terahertz light. The pulses have a low average output power but a high peak output power, thereby enabling imaging of the suspicious object or per... | 03/11/2008 |
| 7187130 | Electron beam tubes including a vacuum envelope seal and having a metallized balance ring A linear electron beam tube comprises an electron gun having a cathode and a grid, and an anode arranged in a first portion of a drift tube. The drift tube is within a vacuum envelope and has first and second portions separated by a gap at which point an electron be... | 03/06/2007 |
| 7183564 | Channel spark source for generating a stable focused electron beam In a channel spark source triggered by gas discharge for generating a stable focused electron beam, a gas supply for a hollow cathode thereof is provided which generates in the hollow cathode a pressure differential so that the multiplication of charge carriers in a... | 02/27/2007 |
| 7145297 | L-band inductive output tube An inductive output tube (IOT) operates in a frequency range above 1000 MHz. An output window may be provided to separate a vacuum portion of the IOT from an atmospheric pressure portion of the IOT, the output window being surrounded by a cooling air manifold, the m... | 12/05/2006 |
| 7116051 | Multibeam klystron A multibeam, electrostatically focused klystron includes a plurality of conductive members, ones of which are recessed to provide input and output sections of microwave cavities, wherein focusing voltage is applied between those sections. The conductive members are ... | 10/03/2006 |
| 7107163 | Magnetic levitation force control An apparatus and method for predicting attractive magnetic levitation force comprising measuring flux density for a component of an attractive magnetic levitation system and computing a predicted attractive magnetic levitation force from the flux density. ... | 09/12/2006 |
| 7088060 | Electron tube for communication An electron tube for communication is provided with an output waveguide that is directly coupled to an outlet port of a RF (Radio Frequency) wave signal, and at least one of a low-pass filter, a high-pass filter, and a band-pass filter is included inside the output ... | 08/08/2006 |
| 6924920 | Method of modulation and electron modulator for optical communication and data transmission The present invention provides a method for modulating light by a driven particle beam is disclosed. An optical beam is being sent to metal-dielectric structure so that the optical field partially transforms into a delayed electromagnetic wave, in a preferred embodi... | 08/02/2005 |
| 6593695 | Broadband, inverted slot mode, coupled cavity circuit A coupled cavity circuit for a microwave electron tube comprises at least two resonant cavities adjacent to each other. An electron beam tunnel passes through the coupled cavity circuit to allow a beam of electrons to pass through and interact with the el... | 07/15/2003 |
| 6574248 | Laminated wigglers A wiggler that, when used in a free electron laser, reduces the harmonicity of the light emitted from the free electron laser. In general, the reduced harmonicity is accomplished by making the magnetic field distribution of the wiggler to be sinusoidal, r... | 06/03/2003 |
| 6556595 | Hybrid wiggler Disclosed is a novel hybrid wiggler as a kind of insertion devices, for example, in an electron accelerator. Different from a conventional hybrid wiggler consisting of two oppositely facing arrays each formed of an alternate arrangement of a plurality of ... | 04/29/2003 |
| 6476558 | Mode converter and gyrotron tube provided with mode converter for converting mode of millimeter waves In a substantially circular waveguide constituting a mode converter in a gyrotron tube, there is a region whose transverse inner surface shape changes to a non-true circular shape from a true circular shape in a range of 0 mm to 5 mm toward a radiation ap... | 11/05/2002 |
| 6448850 | Electromagnetic wave amplifier and electromagnetic wave generator An electromagnetic wave amplifier and an electromagnetic wave generator operate using electron beams in a vacuum environment. The amplifier, arranged in a vacuum environment, comprises an electron emitting section for emitting electron beams and an amplif... | 09/10/2002 |
| 6445130 | Axially polarized radiation from a toroidal magnetic structure with an equatorial slot A toroidal magnet structure for polarizing a magnetic wiggler and a synchrotron normal is provided. This structure comprises a toroid composed of a plurality of magic ring semicircular segments, with an equatorial slot extending about a periphery of the t... | 09/03/2002 |
| 6424090 | Modification of millimetric wavelength microwave beam power distribution A system and method for increasing the power density distribution uniformity of a gyrotron radiation beam provides a mirror for reflecting the gyrotron beam onto an object to be irradiated, where the shape of the mirror surface is changed by a plurality o... | 07/23/2002 |
| 5777572 | Device for damaging electronic equipment using unfocussed high power millimeter wave beams A device for damaging electronic equipment has a millimeter wave generator, such as a gyrotron oscillator, for producing very high power millimeter waves. A beam former antenna forms the millimeter waves into narrow beams for distance transmission. An ant... | 07/07/1998 |
| 5723949 | Spherical magnet structure and use thereof in wiggler radiation source A spherical magnet structure having a cavity centrally disposed therein at an axis therethrough, is constructed to distribute a magnetic field in the cavity with the magnitude thereof varying periodically over a circular pattern in a plane passing perpen... | 03/03/1998 |
| 5719469 | Spherical magnet having a gap with a periodically varying field for a wiggler radiation source A spherical magnet structure having an axis about which an equatorial gap disposed into the periphery thereof, is constructed to sustain a magnetic field across the gap with the field magnitude varying periodically over a circular pattern in a plane pass... | 02/17/1998 |
| 5610482 | Gyrotron and method of improving its efficiency In a gyrotron comprising a cathode with an emitter ring, an accelerating anode, a resonator, a collector, and an uncoupling conduit, an arrangement is disposed around the resonator which generates a solenoidal static axial magnetic constant field which, i... | 03/11/1997 |
| 5536992 | Linear electron beam tubes arrangements An inductive output tetrode includes a cylindrical ceramic envelope within which is located an electron gun including a cathode and grid. An annular resonant input cavity into which a high frequency signal is coupled surrounds the envelope and is located ... | 07/16/1996 |
| 5280490 | Reverse guide field free electron laser An electromagnetic radiation amplification device comprising an electron gun for introducing a stream of electrons into an electron drift tube/wavequide in which an axial magnetic field and a wiggler magnetic field have been induced to impart a helical gy... | 01/18/1994 |
| 5144193 | High field pulsed microwiggler comprising a conductive tube with periodically space slots A microwiggler assembly produces large magnetic fields for oscillating ched particle beams, particularly electron beams for free electron laser (FEL) application. A tube of electrically conductive material is formed with radial slots axially spaced at th... | 09/01/1992 |
| 5099175 | Tunability enhanced electromagnetic wiggler The invention discloses a wiggler used in synchrotron radiation sources and free electron lasers, where each pole is surrounded by at least two electromagnetic coils. The electromagnetic coils are energized with different amounts of current to provide a w... | 03/24/1992 |
| 5052003 | Quasi-optical gyrotron In a quasi-optical gyrotron, two coils (3a, 3b) in a Helmholtz arrangement generrate a static magnetic field aligned parallel to an electron beam axis (2). As a result, the electrons passing along the electron beam axis (2) parallel to the magnetic field ... | 09/24/1991 |
| 5030929 | Compact waveguide converter apparatus Conversion from a whispering gallery or volume mode to a more useable mode, such as the HE1,1 mode is achieved in a waveguide mode converter that includes input and output sections. The input section includes overlapping circular and coaxial wa... | 07/09/1991 |
| 5015914 | Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide In a gyrotron cavity resonator, generated energy is extracted into a symmetric set of fundamental-mode waveguides by ports disposed to couple energy in phase from the operating electromagnetic mode but in anti-phase with respect to an unwanted mode of low... | 05/14/1991 |
| 4939740 | Cyclotron autoresonance maser with helical electron guiding center A cyclotron autoresonance maser includes an evacuated drift tube with a first end, a second end and an axis. An electron gun introduces a beam of relativistic electrons to the drift tube first end and, for example, a wiggler magnet causes the electrons to... | 07/03/1990 |
| 4926094 | High-performance gyrotron for production of electromagnetic millimeter or submillimeter waves This invention relates to a high-performance gyrotron for the production of electromagnetic millimeter or submillimeter waves with a quasi-optical resonator. The latter is formed by two concave mirrors (1, 2) placed mutually opposite one another on an opt... | 05/15/1990 |
| 4926093 | Gyrotron device A gyrotron device according to the present invention, having an electron gun for emitting an electron beam having an annular cross seciton, coils for applying a magnetic field to the electron beam emitted from the electron gun, a resonator for resonating ... | 05/15/1990 |
| 4918049 | Microwave/far infrared cavities and waveguides using high temperature superconductors The structures for confining or guiding high frequency electromagnetic radiation have surfaces facing the radiation constructed of high temperature superconducting materials, that is, materials having critical temperatures greater than approximately 35°K... | 04/17/1990 |
| 4897609 | Axially coupled gyrotron and gyro TWTA A tilt-angle gun provides a conically-shaped electron beam formed in a magnetically-shielded region which is injected into a coaxial waveguide of the amplifier embodiment of the invention and into a coaxial cavity of the oscillator embodiment immersed in ... | 01/30/1990 |
| 4876687 | Short-period electron beam wiggler A free-electron laser has a wiggler for a linear electron beam comprising two sets of magnetic polepieces 26, 28 periodically spaced along opposite sides of the beam. The polepieces of one set 28 are displaced along the beam from the other set 26 by one-h... | 10/24/1989 |
| 4855644 | Crossed double helix slow-wave circuit for use in linear-beam microwave tube A helix slow-wave circuit for use in a linear-beam microwave tube device, comprises a first helix formed by a first wire-like member wound in a first sense at a plurality of turns, and a second helix formed by a second wire-like member wound at a pluralit... | 08/08/1989 |
| 4839561 | Gyrotron device A gyrotron device including an electron gun for emitting a hollow electron beam, solenoid coils for generating magnetic fields so as to produce a cyclotron movement to the electron beam emitted from the electron gun, a plurality of ring mirrors arranged i... | 06/13/1989 |
| 4829527 | Wideband electronic frequency tuning for orotrons An orotron for generating near millimeter wavelength radiation at a selectable output frequency within a wide frequency range, in which the orotron output power is automatically tuned electronically at the selected output frequency. A piezoelectric electr... | 05/09/1989 |
| 4819238 | Wide band free electron laser with variable phase and frequency A free electron laser (FEL) is disclosed in which the phase of the output electromagnetic beam is inherently adjustable without the use of any extraneous optical phase shifting materials. This is accomplished by implementing the FEL as a pair of series-co... | 04/04/1989 |
| 4792725 | Instantaneous and efficient surface wave excitation of a low pressure gas or gases A system for instantaneously ionizing and continuously delivering energy in the form of surface waves to a low pressure gas or mixture of low pressure gases, comprising a source of rf energy, a discharge container, (such as a fluorescent lamp discharge tu... | 12/20/1988 |
| 4789808 | Gyrotron device with adjustable pitch factor In gyrotron devices, pitch factor and efficiency are directly proportional. When the pitch factor is increased, however, a larger starting current is needed. The available power supply thus limits the pitch factor and subsequently, the efficiency of the d... | 12/06/1988 |
