Patents by Inventor Glenn Fasnacht

Glenn Fasnacht 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).

  • Contact check for remote sensed measurement
    Patent number: 5999002
    Abstract: A contact resistance check circuit and method for verifying that a sufficient electrical connection is established between a source and a sense lead of a Kelvin connection. The circuit includes a microprocessor for driving a transformer that is connected to the source/sense probe (i.e., contact resistance) with an input pulse. The input pulse is altered in relation to the magnitude of the contact resistance to produce a check pulse. A comparator is used to compare the check pulse with a threshold voltage and for generating a fault indication signal. A flip flop then stores the fault indication signal so that the fault indication signal may be monitored by the microprocessor.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: December 7, 1999
    Assignee: Keithley Instruments, Inc.
    Inventors: Glenn Fasnacht, Wayne Goeke
  • Test contact connection checking method and circuit
    Patent number: 5886530
    Abstract: A contact resistance check circuit and method for verifying that a sufficient electrical connection is established between a source and a sense lead of a Kelvin connection. The circuit includes a microprocessor for driving a transformer that is connected to the source/sense probe (i.e., contact resistance) with an input pulse. The input pulse is altered in relation to the magnitude of the contact resistance to produce a check pulse. A comparator is used to compare the check pulse with a threshold voltage and for generating a fault indication signal. A flip flop then stores the fault indication signal so that the fault indication signal may be monitored by the microprocessor.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: March 23, 1999
    Assignee: Keithley Instruments, Inc.
    Inventors: Glenn Fasnacht, Wayne Goeke