Patents by Inventor Jack H. Jenkins

Jack H. Jenkins 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).

  • Data recorder suitable for use as a railcar hunting detector
    Patent number: 7161473
    Abstract: A data recorder for use as a hunting detector includes a piezofilm accelerometer. A bandpass filter tuned to the approximate frequency of a hunting railcar couples the output of the accelerometer to a hold circuit. A controller, operating primarily in a low power consumption “sleep” mode, awakens periodically to check the hold circuit. If the contents of the hold circuit is greater than a predetermined value, a counter is incremented. When the counter exceeds a preset limit, then a flasher on the exterior of the data recorder is enabled.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: January 9, 2007
    Assignee: Instrumented Sensor Technology, Inc.
    Inventors: Gregory D. Hoshal, Jack H. Jenkins
  • Method and apparatus for recording time history data of physical variables
    Patent number: 5754449
    Abstract: A method and apparatus for recording time history data of physical variables during a recording session divided into discrete time windows each uniquely paired with a discrete segment of memory. Each recordable event is stored in the segment of memory corresponding to the time window during which it occurred. If the corresponding segment of memory is filled, the event is processed using an overwrite scheme that considers for replacement only those events in that segment of memory.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: May 19, 1998
    Assignee: Instrumented Sensor Technology, Inc.
    Inventors: Gregory D. Hoshal, Matthew R. Busdiecker, Jack H. Jenkins