Patents by Inventor Johannes Bullinga

Johannes Bullinga 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).

  • Self-excited inverter with suppressed current spikes
    Patent number: 4177509
    Abstract: A free-running inverter preventing excessive current spikes comprises a transformer and a switch means for alternately connecting, and then disconnecting, a DC voltage to a transformer primary winding which encloses a parallel combination of a saturating magnetic core and a non-saturating magnetic core. A transformer feedback winding enclosing only the saturating core drives the switch means during and between switch states. Switching between states is accomplished prior to saturation of the composite core.
    Type: Grant
    Filed: October 26, 1978
    Date of Patent: December 4, 1979
    Assignee: Rockwell International Corporation
    Inventor: Johannes Bullinga
  • Current limiting apparatus
    Patent number: 4019096
    Abstract: A series current limiting circuit for intermittent current flow when the current exceeds a predetermined limit. A time delay circuit is incorporated to maintain the interrupted condition for a predetermined additional time after initial interruption before returning the circuit to an ON state whereby it can be determined if the conditions causing overload have been removed.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: April 19, 1977
    Assignee: Rockwell International Corporation
    Inventor: Johannes Bullinga