Patents by Inventor Ira Jay Pitel

Ira Jay Pitel 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).

  • High power factor AC to DC converter circuit
    Patent number: 4074344
    Abstract: A high power factor AC to DC converter circuit includes a rectifier circuit coupled to an AC potential source and providing a full-wave rectified pulsating DC potential to a switching regulator circuit with a radio frequency current filter connected in circuit with the rectifier and switching regulator circuits to provide a pulsating DC current in phase with and of at least 50% duration of said pulsating DC potential whereby a power factor of at least 90% is effected.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: February 14, 1978
    Assignee: GTE Sylvania Incorporated
    Inventor: Ira Jay Pitel
  • Tuned oscillator ballast circuit
    Patent number: 4045711
    Abstract: A fluorescent lamp ballast circuit includes a tuned oscillator coupled to a pulsed DC potential source and to a transformer having a first winding directly connected to the oscillator and in series connection with a capacitor to form a series resonant circuit. A second winding of the transformer inductively couples the first winding of the transformer to the oscillator, a third winding inductively couples a load across the capacitor of the series resonant circuit, and a fourth winding is inductively coupled to the first winding of the transformer and clamps the DC potential source to a given potential level. Also, protection for open circuits, short circuits, and temperature change due to changed ambient conditions or increased current flow is provided.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: August 30, 1977
    Assignee: GTE Sylvania Incorporated
    Inventor: Ira Jay Pitel
  • Class ABC amplifier circuit
    Patent number: 4027270
    Abstract: A high efficiency linear amplifier which operates in a class AB mode so long as the output potential is less than a first potential source and switches to a second potential source and output electron device when the output potential exceeds the magnitude of the first potential source.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: May 31, 1977
    Assignee: GTE Sylvania Incorporated
    Inventor: Ira Jay Pitel
  • Temperature stabilized voltage reference circuit
    Patent number: 3959717
    Abstract: A very stable voltage reference potential is provided by circuitry wherein an avalanche device provides an output voltage which is, in turn, applied to a voltage to current converter to provide a current for the avalanche device which is dependent upon the output voltage rather than the voltage of the avalanche device.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: May 25, 1976
    Assignee: GTE Sylvania Incorporated
    Inventor: Ira Jay Pitel
  • Fast warm up electronic ballast circuit for a high pressure discharge lamp
    Patent number: 3931544
    Abstract: An electronic ballast circuit for reducing the warm up time of high intensity discharge (HID) lamps wherein lamp current flow is abruptly reduced by a switching means responsive to load voltage variations upon attainment of power in an amount sufficient to activate the HID lamp.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: January 6, 1976
    Assignee: GTE Sylvania Incorporated
    Inventor: Ira Jay Pitel