Patents Examined by Saxfield Chatmon, Jr.
  • Patent number: 4481444
    Abstract: There is disclosed a traveling wave tube with a slow wave structure having means for frequency and directionally sensitive wave amplification. The slow wave structure includes a conductive helix coaxially mounted within a conductive tubular housing and a conductive support structure longitudinally disposed within the housing and extending transversely from the helix to the housing. In some embodiments, the support structure is combshaped and in one embodiment is a helical ridge wound in registration with and in the same sense as the helix. The pitch of the housing and a preselected parameter of the support structure are simultaneously varied along the length of the helix such that a wave at a given frequency band traveling along the slow wave structure in a first direction is preferentially amplified with respect to waves traveling in an opposite direction.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: November 6, 1984
    Assignee: Litton Systems, Inc.
    Inventor: Robert M. Phillips
  • Patent number: 4455507
    Abstract: A termination device for absorbing RF energy waves in the termination chamber of a traveling wave tube. The termination device is formed by modifying two wedge shaped termination devices of the prior art. Specifically, two well known single wedge termination devices are sliced in half to produce two wedges each one half the thickness of the prior art single wedge device. The two halves are positioned with their newly formed surface, formed by the slicing, in opposed facing contact. The new double wedge thus has the same thickness as the prior single wedge and is readily accommodated within the termination chamber. The double wedge termination device greatly reduces small signal gain variations across the operating frequency band of the traveling wave tube.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: June 19, 1984
    Assignee: Hughes Aircraft Company
    Inventors: Norman A. Greco, Simon Z. Arkoff
  • Patent number: 4453106
    Abstract: A lamp comprising a tubular quartz envelope having a mounting base compression fitted to one end thereof.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: June 5, 1984
    Assignee: The Perkin-Elmer Corporation
    Inventor: Carlo La Fiandra
  • Patent number: 4445071
    Abstract: A gyrocon deflection system can provide circular beam deflection using a single RF coupler, without providing a phase difference between the two beam deflection signals to account for electron beam transit time between the two sets of deflection plates. The two sets of deflection plates are internally connected pairwise together so that both deflection regions are in RF phase, and the midplanes of the two sets are spaced 90.degree. apart electrically at the desired operating voltage and frequency.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: April 24, 1984
    Assignee: Hughes Aircraft Company
    Inventors: Tore Wessel-Berg, Ivo Tammaru
  • Patent number: 4445070
    Abstract: An electron gun producing a spiral electron beam for gyrotron devices comprises means for producing an axial magnetic field propagating the beam axially beyond the anode of the electron gun, and separate electromagnets for producing a transverse "kicker" electromagnetic field beyond the anode and perpendicular to the magnetic propagation field such as to apply a transverse impulse of short duration, imparting a transverse motion, to the electrons to cause them to spiral as they are propagated axially beyond the anode.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: April 24, 1984
    Assignee: Elta Electronics Industries Ltd.
    Inventor: Jonathan M. Wachtel
  • Patent number: 4438368
    Abstract: A plasma treating apparatus includes: an air-core coil for generating a static magnetic field which is axially uniform and a high-frequency waveguide for generating a high-frequency electromagnetic field which is irregular in the axial direction of the air-core coil. A plasma generating glass tube is disposed in the high-frequency waveguide and adapted to be supplied with a gas and a plasma reaction bath held under a vacuum for receiving the plasma flow which is generated axially in the glass tube. A substrate platform is disposed in the reaction bath for supporting a substrate to be treated at a right angle with respect to the plasma flow. There is also included a magnetic field generating coil disposed outside of said reaction bath for shaping the plasma.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: March 20, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Haruhiko Abe, Hiroshi Harada, Masahiko Denda, Koichi Nagasawa, Yoshio Kono
  • Patent number: 4438367
    Abstract: A resistor device for attenuating radio frequency power includes a radio frequency conductor connected to a series of fins formed of high relative magnetic permeability material. The fins are dimensional to accommodate the skin depth of the current conduction therethrough, as well as an inner heat conducting portion where current does not travel. Thermal connections for air or water cooling are provided for the inner heat conducting portions of each fin. Also disclosed is a resistor device to selectively alternate unwanted radio frequency energy in a resonant cavity.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: March 20, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Quentin A. Kerns, Harold W. Miller
  • Patent number: 4437034
    Abstract: Disclosed is a parallel wire grid and an apparatus and method for making the same. The grid consists of a generally coplanar array of parallel spaced-apart wires secured between metallic frame members by an electrically conductive epoxy.The method consists of continuously winding a wire about a novel winding apparatus comprising a plurality of spaced-apart generally parallel spindles. Each spindle is threaded with a number of predeterminedly spaced-apart grooves which receive and accurately position the wire at predetermined positions along the spindle. Overlying frame members coated with electrically conductive epoxy are then placed on either side of the wire array and are drawn together. After the epoxy hardens, portions of the wire array lying outside the frame members are trimmed away.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: March 13, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Edward F. Lewandowski, John Vrabec
  • Patent number: 4437039
    Abstract: High-intensity-discharge (HID) sodium lamp has a starting aid comprising a conducting ceramic which is hermetically sealed to and extends through an alumina arc tube at least at one end thereof to form an electrically conducting path. The conducting ceramic is fused to the alumina arc tube and is electrically conductive by virtue of having embedded therein a small percentage of finely divided refractory metal. At least during starting, the conducting ceramic is electrically connected through a resistor to the opposite lamp electrode and, as a result, on application of energizing potential, a glow discharge is established between an arc-tube-interior portion of the conducting ceramic and the adjacent electrode to ionize the atmosphere within the arc tube and facilitate lamp starting.
    Type: Grant
    Filed: October 25, 1979
    Date of Patent: March 13, 1984
    Assignee: North American Philips Electric Corp.
    Inventor: Daniel A. Larson
  • Patent number: 4437041
    Abstract: To provide mercury vapor control in a compact, solenoidal electric field (SEF) lamp there is provided a means for controllably heating a length of conductive material disposed within the lamp envelope so as to thereby heat an amalgam patch on the material. In this way, mercury vapor pressure is controlled within the lamp, not only during lamp operation but also under lamp starting conditions.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: March 13, 1984
    Assignee: General Electric Company
    Inventor: Victor D. Roberts
  • Patent number: 4434388
    Abstract: The following specification discloses an electrical power controller that has been specifically directed toward the control of lighting. The invention is directed toward reducing electrical energy consumption of high intensity discharge (HID) lamps and fluorescent lamps. The controller is connected at its input to a power line to light a bank of lamps or other electrical energy consuming devices. The output of the controller to the lamps can effectively be optimized at a substantially lower level, providing a high degree of lighting while effectuating a substantial energy saving. The output is controlled by a variable autotransformer having a drive motor that is in turn controlled by an amplifier comparator circuit. A bidirectional ramp generator provides increases and decreases of voltage in a manner to maintain the lights in their optimum operating condition.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: February 28, 1984
    Inventors: LeRoy J. Carver, John K. Penrod
  • Patent number: 4433270
    Abstract: The reversible periodic magnetic focusing system according to the invention comprises a successive arrangement of permanent magnets 7 magnetized in the opposite sense, and pole shoes 1 interposed between the permanent magnets 7. Each pole shoe 1 is provided with a hole for passage of an electron flow. The holes of the pole shoes 1 receive grids 2 with meshes 3. The grids 2 are of a magnetically soft material and have a magnetic, thermal and electric contact with the pole shoes 1. Respective meshes 3 of the grids 2 are arranged coaxially.The invention stipulates ratios between the geometrical dimensions of components of the reversible periodic magnetic focusing system, which ensure passage of electron beams 5 through all the meshes 3 of the grids 2.The invention is applicable to the electronic industry where it can be used to design and manufacture, compact, low-voltage, superhigh frequency, high-power devices, such as klystrons and travelling wave tubes.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: February 21, 1984
    Inventors: Sergei S. Drozdov, Mikhail V. Kiselev-Dmitriev, Sergei V. Lebedinsky, Sergei N. Nazarov, Jury V. Lavrentiev, Pavel V. Nevsky, Ninu V. Kutasheva
  • Patent number: 4431945
    Abstract: A high pressure metal vapor discharge lamp comprising a discharge tube disposed in an outer jacket; said discharge tube having electrodes and containing a filling comprising a starting rare gas composed primarily of xenon at a pressure from 40 to 200 Torr; means for starting said discharge tube comprising a glow starter comprising a pair of contacts spaced apart not more than 2.5 mm from each other, and containing a gas composed primarily of argon at a pressure of at least 7 Torr; the pressure in said glow starter (P.sub.g) being related to the pressure in the discharge tube (P.sub.i), according to the expression ##EQU1## and a starting electric conductor adapted to contact the discharge tube on starting thereof and to separate from the discharge tube after starting.
    Type: Grant
    Filed: March 5, 1982
    Date of Patent: February 14, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Kouzou Kawashima, Akira Ito
  • Patent number: 4431944
    Abstract: In the last section of a delay line having coupled cavities for a traveling-wave tube, the following parameters are progressively increased in the direction of propagation of the electron beam: the diameter of the opening provided for the passage of the electron beam, thus making it possible to ensure better transmission of the beam and consequently to ensure higher efficiency as well as lower heat build-up; the ratio (D.sub.2 -D.sub.1)/2 of the cavity nozzles; and the thickness of the walls which are common to two adjacent cavities.
    Type: Grant
    Filed: September 15, 1981
    Date of Patent: February 14, 1984
    Assignee: Thomson-CSF
    Inventors: Christian Deville, Francis Payen
  • Patent number: 4429255
    Abstract: The klystron of the invention comprises cavities 5 with face walls 7 and drift tubes 8. There are annular slots 9in the face walls 7 and drift tubes 8, said annular slots 9 accommodating plates 10 rigidly attached thereto, said plates 10 being made of a nonmagnetic material. The height of the plates 10 is less than half the height of the body 6 of the cavity 5. The length of the plates 10 is equal to the half-difference between the inner diameter of the body 6 and the inner diameter of the drift tube 8. The length of the inner circumference of the body 6 is more than ten times the total thickness of the plates 10.The klystron of the invention can be used in radioelectronic units to provide for higher stability of their output characteristics.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: January 31, 1984
    Inventors: Vitaly I. Pasmannik, Ljudmila A. Mironenko, Sergei N. Nazarov
  • Patent number: 4427923
    Abstract: An electrodeless fluorescent light source including an electrodeless lamp containing a metal iodide or iodine. A fluorescing material is disposed between the electrodeless lamp and an outer envelope. When the contents of the electrodeless lamp are excited by high frequency power, excited iodine atoms emit ultraviolet radiation. The ultraviolet radiation impinges on the fluorescing material causing it to emit visible light. The fluorescing material may be a solid phosphor material on the outer surface of the electrodeless lamp, a solid phosphor material on the inner surface of the outer envelope, a gaseous phosphor material in the space between the electrodeless lamp and the outer envelope, or some combination thereof.
    Type: Grant
    Filed: October 1, 1981
    Date of Patent: January 24, 1984
    Assignees: GTE Laboratories Inc., GTE Products Corp.
    Inventors: Joseph M. Proud, Stephen G. Johnson
  • Patent number: 4427879
    Abstract: An optoelectronic connector assembly having electrical and optical connector parts include housings which can be resiliently engaged and manually disengaged from each other. The electrical connector part housing has a socket receiving cavity therethrough for receiving an optoelectronic transducer. The transducer can be a light emitting element such as a light emitting diode, or can be a light responsive element such as a photodiode. The two housings are engaged by means of a protuberance having an inclined ramp on one of the housings, the other housing having an interlock recess therein so that, when the two housings mate, the inclined ramp operates upon the interlock recess so as to provide for a resilient but positive and firm engagement of the two housings. The optical connector part housing has a pin contact receiving cavity for receiving a fiber optic light guide.
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: January 24, 1984
    Assignee: Allied Corporation
    Inventors: James V. Becher, Tedford H. Spaulding
  • Patent number: 4427921
    Abstract: A source of ultraviolet radiation including an electrodeless lamp containing a metal iodide or iodine. When the contents of the electrodeless lamp are excited by high frequency power, excited iodine atoms emit ultraviolet radiation.
    Type: Grant
    Filed: October 1, 1981
    Date of Patent: January 24, 1984
    Assignees: GTE Laboratories Inc., GTE Products Corp.
    Inventors: Joseph M. Proud, Stephen G. Johnson
  • Patent number: RE31560
    Abstract: A graphite disc assembly for a rotating x-ray tube embodying a graphite substrate and an anode target of either tungsten or tungsten rhenium joined thereto by a layer of rhodium, osmium, ruthenium, platinum, platinum-chromium, or palladium. .Iadd.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: April 17, 1984
    Assignee: General Electric Company
    Inventor: Thomas M. Devine, Jr.
  • Patent number: RE31568
    Abstract: A composite substrate for use in a rotating x-ray anode tube consists of a graphite member joined to another member to which a target anode is affixed.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: April 24, 1984
    Assignee: General Electric Company
    Inventor: Thomas M. Devine, Jr.