Patents by Inventor Mark A. Rosswurm

Mark A. Rosswurm 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: 5180939
    Abstract: An improved device for generating an alternating electrical current is disclosed, employing a stationary electrical exciter coil and inductive ouptut coil, and a pair of reciprocating elements to selectively alternate between a plurality of magnetic flux field paths. The reciprocating elements each have relatively staggered magnetically permeable portions for alternatingly establishing one of the magnetic flux field paths. The alternating flux field paths, each passing through the center axis of the inductive output coil, cause the reversal of the direction of magnetic flux flow through the center axis, inducing the inductive coil to generate an alternating output current.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: January 19, 1993
    Assignee: Cummins Power Generation, Inc.
    Inventor: Mark A. Rosswurm
  • Patent number: 5012237
    Abstract: An improved electrostatic angle resolver is disclosed which eliminates capacitive coupling surfaces from rotor and stator device components of the invention, thus reducing over all space necessary for the resolver. Additionally, the concept disclosed also eliminates the need for rotor guarding techniques to prevent signal loss due to stray and parasitic capacitances. Essentially, current required to maintain capacitor plates at a particular voltage is monitored, and the variations in the current are transformed into voltages, and supplied to an amplifier which, in turn, provides isolation between the sensor, and associated angular decoding circuitry.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: April 30, 1991
    Assignee: Cummins Electronics Company, Inc.
    Inventor: Mark A. Rosswurm
  • Patent number: 4996967
    Abstract: An apparatus and method for generating a highly conductive channel for the flow of plasma current between the electrodes of an ignitor gap device are disclosed. A high voltage transformer having a high turns ratio is used to produce a high voltage spark across an ignitor gap. Subsequently, a high voltage low turns ratio transformer is used to supply a pre-plasma current signal to the ignitor gap at a predetermined time following the high voltage spark thereby ensuring that the ionized channel is developed to a more conductive state prior to introduction of the pre-plasma signal into the ignitor gap. Once the sustaining voltage for sustaining plasma flow through the channel has stabilized to a sufficiently low voltage, a high current main plasma signal is supplied to the ignitor gap thereby expanding plasma flow in the area surrounding the ignitor gap and providing a high quality ignition source for use in internal combustion engines.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: March 5, 1991
    Assignee: Cummins Engine Company, Inc.
    Inventors: Mark A. Rosswurm, Luigi Tozzi
  • Patent number: 4998103
    Abstract: An electrostatic angle resolver has a stator for producing a patterned electrostatic field, a rotor having sensivitity to the electrostatic field, a capacitive coupling providing a signal interconnection between the rotor and the stator, and an active shield supplied with a voltage signal substantially identical to that signal present on the stator thereby diminishing degradation in the strength of the signal coupled between the rotor and the stator.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: March 5, 1991
    Assignee: Cummins Electronics Company, Inc.
    Inventors: Mark A. Rosswurm, William G. Wolber, Richard E. DeYoung
  • Patent number: 4649537
    Abstract: A microprocessor-based electronic control unit utilizes a random pattern lock and key failure detection scheme to detect failures in the system being controlled or the control unit itself. The microprocessor system is programmed to receive a random data word, to output the same data word, and to perform a variety of tests which result in the generation of a data stream having a particular relationship to the random data word such that the data stream and the random data word bits can be combined to form a predetermined data word that is needed to maintain microprocessor control of the associated electrical system. If the microprocessor fails to generate a data stream which results in the formation of the proper predetermined data word, the control unit output will be locked into a predetermined state.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: March 10, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Mark A. Rosswurm, Leland L. Kessler
  • Patent number: 4556842
    Abstract: The DC content of an AC waveform is detected by a digital filter which partially filters each phase of the waveform and applies the filtered waveforms sequentially through a multiplexer to a sample and hold circuit which measures the instantaneous value of each phase at two points which are spaced an exact odd number of half cycles apart. The time interval between the measurement points is adjusted according to variations in the AC waveform frequency to maintain required spacing. The measured instantaneous values are fed by an analog to digital converter and to a microprocessor system which averages the two readings to generate a signal corresponding to the DC content for each phase.
    Type: Grant
    Filed: July 26, 1983
    Date of Patent: December 3, 1985
    Assignee: Westinghouse Electric Corp.
    Inventor: Mark A. Rosswurm
  • Patent number: 4370702
    Abstract: The switching intervals for the power transistors in a three-phase inverter are generated by a microprocessor. DC content control is provided separately for each phase by modulation of the duration of the switching intervals through adjustment of the length of the sequences of instructions carried out by the microprocessor.
    Type: Grant
    Filed: January 15, 1981
    Date of Patent: January 25, 1983
    Assignee: Westinghouse Electric Corp.
    Inventors: Kenneth C. Shuey, Mark A. Rosswurm
  • Patent number: 4342076
    Abstract: A transistor current sensing circuit is provided for a power output transistor whose drive circuit includes a current controlled feedback transformer that has a current limited direct current source connected to the secondary winding of the transformer wherein the change in voltage level of the secondary winding upon the completion of turn-off of the output transistor is used as a signal to initiate turn-on of another associated transistor.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: July 27, 1982
    Assignee: Westinghouse Electric Corp.
    Inventors: Mark A. Rosswurm, Joseph M. Urish