Patents by Inventor Norman D. Welch

Norman D. Welch 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).

  • Circuit for providing a common setpoint for manual and automatic regulation of a process control system
    Patent number: 4451879
    Abstract: A circuit for providing a common setpoint for both automatic and manual operation of a process control system includes a process controller. A parameter of the process can be changed by changing the output of a controller. A variable input voltage to the process controller establishes the setpoint of the parameter. Changes in the variable voltage are made either manually or automatically so that a common setpoint is established for both types of operation.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: May 29, 1984
    Assignee: RCA Corporation
    Inventors: Norman D. Welch, John W. Woestman