Patents by Inventor Peter Walsh

Peter Walsh 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).

  • Patent number: 4792716
    Abstract: A high-pressure mercury vapor lamp uses an envelope with an elliptical region which is coated on its interior surface. The coating reflects energy in the violet and passes energy in the green and yellow-green. By suppressing electron transitions which yield violet radiation, transitions which yield green and yellow-green radiation are enhanced, increasing lumen output by redistributing energy to more luminous lines in the line spectrum of mercury vapor plasma.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: December 20, 1988
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4461969
    Abstract: An incandescent electric lamp having a filament which incandesces and produces a vapor of the metal of the filament which normally deposits on the wall. A coating is placed on the filament wall where the majority of the vapor would normally deposit to act as a reflecting coating so that the visible energy reflected from the coating will be transmitted through a portion of the wall which is not blackened by the vapor. The coating thickness is adjusted so that the deposit from the filament builds up on a nodal surface so that light absorption is small.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: July 24, 1984
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4409512
    Abstract: An incandescent lamp utilizing an etalon type transparent heat mirror on the lamp envelope for transmitting radiation in the visible range produced by the lamp filament and reflecting infrared thermal radiation back to the filament for increasing its temperature and thereby increasing its efficiency.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: October 11, 1983
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4379249
    Abstract: An incandescent electric lamp having an envelope in the shape of an ellipse rotated about a center line and defining a circle of focal points, said envelope having thereon a coating which reflects infrared energy produced by the filament and at least a part of the coating transmitting all or a selected portion of the visible range light energy produced by a filament which is shaped and located so that at least a part of the filament lies on or adjacent to the focal circle so that infrared energy produced by the filament at one focal point on the circle will be reflected by the coating back to another focal point on the circle.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: April 5, 1983
    Assignee: Duro-Test, Corporation
    Inventor: Peter Walsh
  • Patent number: 4375605
    Abstract: An incandescent electric lamp having a coating to reflect infrared energy back to the filament to raise its operating temperature in which the envelope is shaped as an ellipsoid and the filament and envelope have a relationship to reduce losses due to aberration and to produce a more uniform temperature distribution along the filament.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: March 1, 1983
    Assignee: Duro-Test Corporation
    Inventors: Raymond P. Fontana, Peter Walsh
  • Patent number: 4366407
    Abstract: An incandescent lamp utilizing a transparent heat mirror coating on the lamp envelope for transmitting radiation in a selected portion of the visible range to produce a desired color and reflecting infrared thermal radiation back to the filament for increasing its temperature and thereby increasing its efficiency. The coating is preferably of the etalon type having a layer of an insulating material sandwiched between two layers of metal.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: December 28, 1982
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4280076
    Abstract: An incandescent electric having a filament which incandesces and produces a vapor of the metal of the filament which normally deposits on the envelope wall. Structures are provided adjacent the filament on which vaporized filament material will deposit rather than deposit on the envelope wall where it would reduce the light output of the lamp.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: July 21, 1981
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4275327
    Abstract: An incandescent electric lamp utilizing an infrared (IR) reflector for directing IR energy back to the filament to increase its operating efficiency in which a reflector is used to redirect circulating infrared energy back to the wall of the envelope where it then can be redirected back to the filament, or reflected directly back onto the filament.
    Type: Grant
    Filed: October 30, 1978
    Date of Patent: June 23, 1981
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4254363
    Abstract: An electrodeless discharge lamp having a sealed elongated toroidal envelope containing an ionizable medium with means for inducing ionization of the medium including a radio frequency energy supply coil formed by coating a transparent conductive material on the envelope. The coil is mounted to reduce the stray radio frequency field and the torroidal envelope is formed to allow for convection cooling of the lamp.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: March 3, 1981
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4249101
    Abstract: An incandescent electric lamp having an envelope and means for reflecting infrared energy back to the filament to increase its operating temperature while transmitting visible energy. The envelope is shaped to reflect the infrared energy back to the filament and the filament is purposely misaligned with respect to the optical center of the envelope so that the infrared energy impinges on the filament after two reflections from the envelope wall.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: February 3, 1981
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4227113
    Abstract: An incandescent lamp of a type in which infrared (IR) energy is to be reflected back to the filament. The lamp has one section which is coated with an IR reflecting material which also will transmit visible light and another section coated with material which has a high reflectivity to IR energy and a low transmissivity to visible light. The filament is mounted off-center of the optical image axis of the envelope and substantially all of the energy in the visible light range exits from the envelope in no more than two passes.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: October 7, 1980
    Assignee: Duro-Test Corporation
    Inventor: Peter Walsh
  • Patent number: 4160929
    Abstract: An incandescent lamp having a transparent heat mirror placed on the lamp envelope which transmits a substantial portion of the energy in the visible range produced by the lamp filament and which reflects back to the filament at least about 80%-85% of the infrared energy that the filament produces. In the preferred embodiment the transparent heat mirror is formed by a layered coating of TiO.sub.2 /Ag/TiO.sub.2 optimized for the operating temperature range of the filament. The filament is constructed to optically conform to the shape of the lamp envelope.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: July 10, 1979
    Assignee: Duro-Test Corporation
    Inventors: Luke Thorington, Peter Walsh, Ronald Koo, Wolfgang Thouret