Patents by Inventor John F. Waymouth

John F. Waymouth has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130052903
    Abstract: An electrodeless plasma lamp and method of forming a seal on an electrodeless bulb for use in the plasma lamp are described. The method may include providing a section of tube, cutting the tube to length, and sealing a first point on one end of the tube in a rounded fashion to form a first end of the electrodeless bulb. The cross-sectional diameter of an opposite end of the tube is reduced to form a tail on the electrodeless bulb. The tail is open to an interior portion of the bulb where the interior portion forms a cavity. One or more fill gases are injected into the cavity of the bulb. A first portion along the tail of the bulb is sealed thereby forming a truncated tail. A second point on the tail, intermediate between a terminal portion of the tail and a portion of the bulb containing the cavity, is sealed. The second point is sealed with a plasma torch by using an inert-gas element with a minimum of hydrogen gas.
    Type: Application
    Filed: August 25, 2011
    Publication date: February 28, 2013
    Applicant: Luxim Corporation
    Inventors: Richard Gilliard, Abdeslam Hafidi, Thomas O'Halloran, John F. Waymouth
  • Patent number: 6605888
    Abstract: A metal halide lamp having excess amount of red radiation, well beyond a tungsten halogen lamp of the same color temperature. The deep saturated red being accomplished with reasonable efficacy utilizing a mixture of sodium and rare earth halides, additional broadening of the Na “D” lines and filtering out the yellow radiation at about 590 nm. The red radiation is comparable to the commercially available white high pressure sodium lamp red radiation.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: August 12, 2003
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: John F. Waymouth, Timothy Lee Kelly, Stefaan Maria Lambrechts, Jakob Maya
  • Patent number: 5834904
    Abstract: EMI suppression in electrodeless discharge lamps by inward RF-reflectance from the enclosure walls (12) of 90%+ and use of an absorber (16) of RF power having an absorption coefficient greater than 40%, a transmission coefficient less than e.sup.-3, and an effective area facing the interior of the enclosure between 5% and 40% of the area of the RF-reflective light transmissive enclosure.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: November 10, 1998
    Assignee: Matsushita Electric Works R&D Lab.
    Inventor: John F. Waymouth
  • Patent number: 5757130
    Abstract: A lamp for emitting in the visible portion of the spectrum, which utilizes a fill which includes a selenium and/or a sulfur containing substance. The lamp has superior performance characteristics. Special electrode structures are provided which enhance longevity.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 26, 1998
    Assignee: Fusion Lighting, Inc.
    Inventors: James T. Dolan, Michael G. Ury, Charles H. Wood, John F. Waymouth
  • Patent number: 5512799
    Abstract: A glowbottle starter switch for igniting gaseous discharge lamps in alternating current circuits. The glowbottle including a hermetically sealed glass envelope (7) containing a fill of an ionizable gas and having at least two lead wires (2,3) disposed therein and extending to the exterior of the envelope (7) and a bimetal switch (4) disposed on at least one of the lead wires (3). The switch (4) is arranged to move within a gap to contact the other of the lead wires (2). An electroluminescent light emitter including an electroluminescent phosphor (6 in FIG. 1) is disposed in optically-contiguous relationship with the glowbottle. The electroluminescent light emitter is arranged to be energized to emit light by electric fields produced by alternating voltage between the lead wires (2,3).
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: April 30, 1996
    Assignee: John F. Waymouth Intellectual Property and Educational Trust
    Inventor: John F. Waymouth
  • Patent number: 5095245
    Abstract: The EL device includes a first electrode which is a transparent electrically conducting layer, a dielectric layer overlying the first electrode and a plurality of electroluminescent block members disposed in spaced relationship on the dielectric layer, each EL block member having a first surface disposed in contact with the dielectric layer and a distal second surface. A second or counter electrode which is formed of an electrically conductive layer is positioned in spaced relationship to the distal second surfaces of the electroluminescent block members. The dimensions of the electroluminescent block provide for preselected sonic isolation so as to provide for reduction of phonon waves of varying energies and increase the output brightness of the device.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: March 10, 1992
    Assignee: John F. Waymouth Intellectual Property and Education Trust
    Inventor: John F. Waymouth
  • Patent number: 5079473
    Abstract: An optical light source device includes a source member providing the emission of electromagnetic radiation wavelengths in the optical region of the spectrum, and at least one cavity waveguide member coupled with the electromagnetic radiation source member having a predetermined lateral dimension. The cavity waveguide member and predetermined dimension restrict the emission of electromagnetic radiation in the long wavelength non-visible infra-red range. In a preferred embodiment, the optical light source is formed with an array of optical light source members and associated cavity waveguide members.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: January 7, 1992
    Assignee: John F. Waymouth Intellectual Property and Education Trust
    Inventor: John F. Waymouth
  • Patent number: 5051649
    Abstract: A ballastless high pressure discharge lamp includes an arc tube, electrodes disposed in the arc tube, a column of mercury disposed in the arc tube and having a volume less than the volume of the arc tube, and cushion material disposed in the arc tube adjacent at least one of the electrodes. The cushion material comprises an inert gas impinging upon at least one end of the column of mercury. At least one of the electrodes extends into the column of mercury. The discharge lamp also includes a heating member disposed adjacent the arc tube to separate the column of mercury into two sub-columns by the vaporization of a portion of the mercury column to thereby form a space between the two sub-columns and compress the cushion material and allow one of the mercury sub-columns to engage one of the electrodes whereby to form an arc in the space between the two sub-columns of mercury.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: September 24, 1991
    Assignee: John F. Waymouth Intellectual Property and Education Trust
    Inventor: John F. Waymouth
  • Patent number: 5017831
    Abstract: A glow discharge lamp that includes a light transmitting envelope containing a noble gas fill material and a pair of electrodes disposed in the envelope. Lead-in wires couple to the electrodes and extend to and are hermetically sealed in the envelope. The electrodes include an anode electrode and a cathode electrode. A getter material is disposed on the anode electrode. The getter material is maintained at an elevated temperature by virtue of a continuous lamp discharge to thus maintain chemical pumping in the envelope for the absorption of residual envelope gases.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: May 21, 1991
    Assignee: GTE Products Corporation
    Inventors: Andre C. Bouchard, John F. Waymouth
  • Patent number: 4895420
    Abstract: A high reflectance light guide may be inexpensively made by rolling a thin transparent plastic film to form a tube. The tube is formed with multiple layers of the plastic material, and air entrained between the layers of plastic. When the plastic material and the separating layers of air have thicknesses that are approximately equal, there is a high degree of reflectance at the plastic and air interface. Light can then be directed along the interior of the tube with little light loss. Light may then be efficiently distributed over an extended distance with little material cost.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: January 23, 1990
    Assignee: GTE Products Corporation
    Inventor: John F. Waymouth
  • Patent number: 4841196
    Abstract: A two-filament incandescent lamp and operating circuit well suited to lighting applications requiring high service reliability. In the lamp, the rated operating voltage of the second filament is greater than that of the first filament. In the operating circuit, there is an inductive reactance in series with the lamp and, in one aspect of the invention, an electrical connection across the lamp terminals for measuring the operating voltage of the lamp. After the power and rated wattage of both lamp filaments have been selected, matched values of inductive reactance and open circuit voltage of the operating circuit can be uniquely determined such that the following advantages are obtained. When the first lamp filament fails, the second filament comes into full brilliance. In a preferred embodiment of the invention, there will be no significant change in the luminous output of the lamp before and after failure of the first filament.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: June 20, 1989
    Assignee: GTE Products Corporation
    Inventor: John F. Waymouth
  • Patent number: 4812714
    Abstract: A metal halide arc discharge lamp comprises an arc tube containing a chemical fill including mercury and metal halides and having first and second electrodes respectively sealed at opposite ends thereof. An outer envelope surrounds the arc tube and has first and second terminals for electrical connection thereto. An electrodeless source of ultraviolet radiation is provided within the outer envelope proximate the arc tube for producing radiation which illuminates the path between the electrodes of the arc tube to decrease the amount of time for generating a gaseous discharge therebetween. The ultraviolet light source includes an envelope of ultraviolet light transmitting material having opposing ends. Portions of the envelope of the ultraviolet light source are capacitively coupled across the electrodes of the arc tube such that the source produces ultraviolet radiation during lamp starting when the first and second terminals of the lamp are energized.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: March 14, 1989
    Assignee: GTE Products Corporation
    Inventors: William M. Keeffe, John F. Waymouth, Gregory Zaslavsky
  • Patent number: 4488091
    Abstract: A high intensity discharge lamp operable from an AC potential source includes an arc discharge tube having a pair of oppositely disposed main electrodes therein and an associated external starting electrode, all disposed within a sealed envelope having an affixed base with a circuit means including a negative potential blocking device coupling the starting electrode to the AC potential source.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: December 11, 1984
    Assignee: GTE Products Corporation
    Inventors: Martin E. Muzeroll, Robert Bonazoli, John F. Waymouth, Robert J. Karlotski
  • Patent number: 4278310
    Abstract: A percussively-ignited photoflash lamp having an hermetically-sealed glass envelope containing no glass-to-metal seals therein. Ignition of the lamp is achieved by applying a percussive force (e.g. striking) to an external surface of the envelope which results in actuation of an ignition means disposed within the envelope. The ignition means, preferably a frictionally disposed, spring-loaded wire having a quantity of pressure sensitive primer thereon, ignites a quantity of shredded combustible material (e.g. zirconium) within the envelope to produce the desired flash. A method of making the lamp is also described.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: July 14, 1981
    Assignee: GTE Products Corporation
    Inventors: John F. Waymouth, Andre C. Bouchard, Richard A. Fowler, Harold H. Hall, Jr.
  • Patent number: 4233536
    Abstract: An incandescent lamp comprises a glass envelope having a gas fill, a tungsten filament within the envelope, and getter means comprising carbon and hydrogen disposed within the envelope.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: November 11, 1980
    Assignee: GTE Products Corporation
    Inventors: John F. Waymouth, Edmund M. Passmore, George L. Duggan
  • Patent number: 4201540
    Abstract: A percussively-ignited photoflash lamp having an hermetically-sealed glass envelope containing no glass-to-metal seals therein. Ignition of the lamp is achieved by applying a percussive force (e.g. striking) to an external surface of the envelope which results in actuation of an ignition means disposed within the envelope. The ignition means, preferably a frictionally disposed, spring-loaded wire having a quantity of pressure sensitive primer thereon, ignites a quantity of shredded combustible material (e.g. zirconium) within the envelope to produce the desired flash. A method of making the lamp is also described.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: May 6, 1980
    Assignee: GTE Sylvania Incorporated
    Inventors: John F. Waymouth, Andre C. Bouchard, Richard A. Fowler, Harold H. Hall, Jr.
  • Patent number: 4174944
    Abstract: An electrically fired flash lamp which utilizes a single conductive lead member. The lead protrudes within the lamp's envelope and is covered by a quantity of primer material. A conductive coating (e.g. tin oxide) covers a major portion of the external surface of the envelope and is capacitively coupled through the envelope's wall to the combustible filamentary material (e.g. shredded zirconium) therein. In another embodiment, a second conductive coating is located on the internal surface of the envelope opposite the outer coating and in electrical contact with the filamentary material. Accordingly, both coatings are capacitively coupled when the lamp is electrically fired. A sequentially-activated array of the above lamps is also disclosed.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: November 20, 1979
    Assignee: GTE Sylvania Incorporated
    Inventors: P. Bruce Newell, James C. Morris, John F. Waymouth
  • Patent number: 4045156
    Abstract: A photoflash lamp having an envelope composed of a crystallized glass which exhibits high refractoriness and mechanical strength and minimizes the propagation of flaws. The thermal expansion coefficient of the glass permits a match seal to commonly employed dumet wire leads.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: August 30, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Gordon P. K. Chu, Dennis B. Shinn, John F. Waymouth
  • Patent number: 3947223
    Abstract: A photoflash lamp having a glass envelope with an inner layer or coating of a material selected to have a low thermal conductivity and diffusivity for minimizing heat losses during the collision of molten droplets of combustible metal with the inner wall of the envelope during flashing. In this manner, radiative energy losses resulting from the droplet-wall collisions are minimized and light output is improved.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: March 30, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: Andre C. Bouchard, John F. Waymouth, Thomas J. Sentementes, Naila Saba Jirmanus