Patents by Inventor Victor H. Vlahos

Victor H. Vlahos 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).

  • Method of calibrating light output of a multi-lamp light fastness testing chamber
    Patent number: 5220840
    Abstract: The light output of a multi-lamp lightfastness testing chamber defining a sample testing area in the chamber may be performed by sequentially turning on and off each lamp by itself, while measuring from the sample testing area the irradiation provided by each lamp, while adjusting the intensity of irradiation for each lamp to a desired level. Thereafter, individual lamp sensors (56) sense the light intensity of each individual lamp. Typically by a feedback circuit, the power to each lamp is adjusted so that the sensed light intensity of each lamp is maintained within predetermined limits corresponding to the irradiation level measured from the sample testing area.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: June 22, 1993
    Assignee: Atlas Electric Devices Co.
    Inventors: Eugene N. Neigoff, Gene Comerford, James V. Huber, Victor H. Vlahos
  • Accelerated weathering and lightfastness testing chamber
    Patent number: 5136886
    Abstract: A lightfastness testing chamber comprises an enclosure for samples being tested and at least one, and preferably a plurality of, lamps for irradiating samples in the enclosure. A monitor of the light intensity from each lamp present is provided. By this invention the monitor may comprise a light transmission rod, and preferably one such rod for each of the lamps, having one end positioned adjacent the lamp and another end in communication with light intensity measuring apparatus positioned more remotely from the lamp than the one end. The light transmission rod is preferably positioned on a side of the lamp that is substantially opposed to portions of the lamp that directly irradiate samples in the enclosure. Also, the samples may be moved by an elevatable platform or the like toward and away from the irradiating lamp or lamps to vary as desired the intensity of irradiation applied to the samples.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: August 11, 1992
    Assignee: Atlas Electric Devices Co.
    Inventors: Eugene N. Neigoff, Gene Comerford, James V. Huber, Victor H. Vlahos
  • Xenon lamp circuit
    Patent number: 4743809
    Abstract: A circuit for a Xenon lamp is disclosed comprising an inductor having first, second and third connectors between one terminal of the lamp and a power line, said first connector being connected to said power line, means connecting the third connector to a second terminal of the Xenon lamp, means including control conducting means connected between said second connector to either of said first and third connectors, and means for controlling the control conducting means to control shunting of said inductor between first and second power lines to control power input to the Xenon lamp.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: May 10, 1988
    Assignee: Atlas Electric Devices Company
    Inventor: Victor H. Vlahos