Patents by Inventor Kendal R. Harris

Kendal R. Harris 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: 5796643
    Abstract: A digital filter with a reduced filtering time. On/off data provided by eight contacts are read at predetermined time intervals, and the on/off data are stored in 8-bit binary data. (four-to one-cycle-previous data and new data). Logical AND and logical OR between the data are carried out to obtain AND result X and OR result Z, logical operations between the previous result In-1 and AND result X is carried out to obtain a result Y, and logical AND between the result Y and the OR result Z is carried out. A bit "A" whose AND result X is "1" is set again to "1", and a bit B whose OR result Z is "0" is set again to "0".
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: August 18, 1998
    Assignee: Allen-Bradley Company, LLC
    Inventors: Tomoyuki Nanami, Satoshi Yamashita, Dennis M. Wright, Kendal R. Harris
  • Patent number: 5764927
    Abstract: A bus structure for interconnecting the modules of an industrial automation controller includes DATA lines and associated control lines that enable interface circuits on each module to transfer frames of data. Modules connected to the bus structure support data transfers of differing widths and differing speeds, and interface circuits within each module automatically adapt to data width and speed differences between communicating modules. During a first bus cycle of each transfer, sending and receiving modules negotiate a bus width and clock speed to be used for the transfer by asserting their respective width and speed codes onto a set of wired-or status lines. After the first bus cycle, the status lines are then used for communicating alternate functions between the participating modules.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: June 9, 1998
    Assignee: Allen Bradley Company, Inc.
    Inventors: Timothy J. Murphy, Alan C. Cribbs, Robert C. Weppler, Margarita M. Hutz, Kendal R. Harris, Jack D. Calderon, David A. Karpuszka
  • Patent number: 5745708
    Abstract: A bus structure for interconnecting the modules of an industrial automation controller includes DATA lines and associated control lines that enable interface circuits on each module to send and receive frames of data. An arbitration circuit in each module employs arbitration lines in the bus structure to conduct a two phase competition to determine which module receives the next bus mastership. The arbitration lines include a set of wired-or weight code lines and a single arbitration strobe line. Modules desiring control of the bus structure assert a local weight code onto the weight code lines and determine which module is asserting the numerically greatest local weight code. Arbitration is conducted separately on the bus structure and a winning module is ready to transfer its data frame as soon as the previous winner completes its transfer and relinquishes control of the bus structure.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: April 28, 1998
    Assignee: Allen-Bradley Company, Inc.
    Inventors: Robert C. Weppler, Timothy J. Murphy, Margarita M. Hutz, Alan C. Cribbs, Kendal R. Harris
  • Patent number: 5099449
    Abstract: An industrial controller has an I/O scanner that may scan I/O modules at differing rates depending on the intrinsic bandwidth of the controlled process variable. The user defines an update rate for each I/O module reflecting the bandwidth of its associated variable. The scanner continuously updates a table of I/O events for each I/O module or I/O rack listing permissive and mandatory I/O execution times associated with each event. Using this event table, the I/O scanner determines the next I/O module to be serviced. If the event cannot be serviced on schedule, indication of an event slip is reported to the controller.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: March 24, 1992
    Assignee: Allen-Bradley Company, Inc.
    Inventors: Dennis J. Dombrosky, Kendal R. Harris