Patents by Inventor Andrew F. Szippl

Andrew F. Szippl 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: 4496897
    Abstract: An electric generating device of the self-excited, self-regulated, brushless, synchronous type includes an alternator-exciter for producing an electrical output and an adjusting means for adjusting or setting the output voltage of the alternator-exciter substantially independently of the winding arrangement thereof to control the no-load or light load voltage of the electrical output. A deactivating device deactivates the adjusting control when maximum field current is demanded by a load.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: January 29, 1985
    Assignee: Lima Electric Co., Inc.
    Inventors: Lewis E. Unnewehr, Robert B. Walker, Andrew F. Szippl
  • Patent number: 4408152
    Abstract: A substantially constant frequency self-regulated generator produces in one embodiment 120 volts or the like single phase output or in another embodiment 120 or 240 volts or the like single phase output. The generator employs an exciter stator and a stationary rectifier assembly with the former being a six pole exciter stator alternately wound with three shunt poles and three series poles with two separate windings on each series pole. The three shunt poles of the exciter stator are connected in series making, in effect, one shunt winding. The series circuit consists of two separate windings on each series pole, which are respectively parallel connected and wound on all three series poles. Each series pole then has two separate isolated coils. With the exciter stator there is employed a stationary diode assembly utilizing three diodes as rectifiers for the shunt and isolated series windings.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: October 4, 1983
    Assignee: The Lima Electric Co., Inc.
    Inventors: Andrew F. Szippl, Robert B. Walker
  • Patent number: 4305001
    Abstract: A double induction dynamo electric machine of the exciter-generator type provides an AC electrical output that has a substantially constant frequency characteristic by using a closed frequency loop arrangement without requiring electronic controls or, in most instances, continuous application of an externally derived AC excitation signal. Moreover, the machine preferably provides such AC electrical output with a substantially constant voltage characteristic as the load current varies, without electronic voltage feedback controls.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: December 8, 1981
    Assignee: Lima Electric Company, Inc.
    Inventors: S. R. Murthy Vamaraju, Andrew F. Szippl