Patents by Inventor David E. Bulgher

David E. Bulgher 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: 4698742
    Abstract: A high-voltage converter circuit which uses a slip slide power conditioner to reduce non-monotonic non-linearities in the converter output signal is disclosed. The slip slide power conditioner includes: a choke feed D.C. circulator; two radio frequency (RF) power pumps; a phase detector; a phase controller; and a combiner. The choke feed D.C. circulator receives the D.C. input signal and produces therefrom two voltage output signals which are each sent to one of the two RF power pumps. The two RF power pumps produce two out-of-phase square wave output signals which are algebraically combined in the combiner to form an output signal whose amplitude is a function of phase difference. The phase detector and phase controller sample this output signal and adjust the phase of the two power pumps to remove non-linearities due to secondary ranging (resonance) that beats with harmonics of their square wave signals.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: October 6, 1987
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Franklin B. Jones, Walter E. Milberger, David E. Bulgher, Charles S. Kerfoot
  • Patent number: H335
    Abstract: An electrical power converter comprising two current-fed square wave chops the outputs of which are combined and rectified to yield a variable and regulated output voltage. The phase relationship of the choppers are varied to achieve output voltage control and regulation. The chopper outputs are combined in such a way that the choppers never experience the open-circuit inductance of their output transformers. This enhances frequency agility. A novel choke feed system is provided in which the choke flyback energy is absorbed and then transferred to the input of the other chopper.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: September 1, 1987
    Assignee: The United States of America as respresented by the Secretary of the Army
    Inventors: Walter E. Milberger, Donald C. Lewns, David E. Bulgher