Patents by Inventor Michael Garjian

Michael Garjian 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: 5424893
    Abstract: A gas discharge device, such as a neon tube, is connected to a pair of output terminals of a power supply. The power supply has a transformer with a secondary winding that has first and second sub-windings. Each of the sub-winding is connected to a different output terminal and two conductors connect the first and second sub-windings to earth ground. A current sensor detects whether unequal magnitudes of current flow through in the two conductors. A resonant control circuit applies an excitation current to the primary winding of the transformer unless an imbalance of current flows. Thus excitation of the transformer is terminated when a high voltage ground fault occurs.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: June 13, 1995
    Inventors: Ralph M. Francis, Jr., Michael Garjian
  • Patent number: 5313145
    Abstract: A transformer has a primary winding connected in series with a direct current source, a solid state switch and a current sensing resistor. A reactive element is coupled to the primary winding to form a resonant circuit. A high voltage for exciting a gaseous discharge device is produced across a first secondary winding of the transformer. A second resistor couples a terminal of the direct current source to one plate of a storage capacitor that has another plate connected to a second terminal of the direct current source. The one plate of the storage capacitor also is connected to a second secondary winding of the transformer. The control circuitry for the power supply is biased by voltage stored across the capacitor.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: May 17, 1994
    Inventors: Ralph M. Francis, Jr., Michael Garjian
  • Patent number: 4703574
    Abstract: A luminous sign (10) comprising three sandwiched plates: a front transparent legend plate (12) incorporating a legend (12a), a center feedthrough plate (14) having a set of termination bores (14a) and crossover bores (14b), and a back crossover cavity plate (16) having a first and second power/gas input bore (16b) (16c) and a crossover cavity (16a) across each set of crossover bores (14b). When all three plates are aligned and hermetically bonded a continuous gas passage is provided through the first power/gas input bore (16b), termination bore (14a), legend (12a), crossover bore (14b), through the crossover cavity (16a), a crossover bore (14b) and again through the legend (12a). The gas path continues through subsequent passages terminating at the second power/gas input bore (16c). Into the power/gas input bores (b 16b) (16c) is hermetically inserted a tubulated electrode (18) and a non-tubulated electrode respectively.
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: November 3, 1987
    Inventor: Michael Garjian