Patents by Inventor Robert E. Chappell

Robert E. Chappell 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).

  • Fiber optic high and low level alarms
    Patent number: 4813759
    Abstract: A system which utilizes optic fibers for the transmission of light from a process measuring device to an alarm actuating circuit is disclosed. An optic fiber (14) is positioned adjacent each process monitoring location and transmits light therefrom to a remotely located matte screen (12) from which it is reflected to a pair of optic fibers (16, 18). The optic fibers (16, 18) transmit the light of optic diodes (20, 22), respectively, which are selectively actuated in response to the color of the light being transmitted and which, in turn, selectively actuate an alarm circuit connected thereto.
    Type: Grant
    Filed: August 25, 1983
    Date of Patent: March 21, 1989
    Assignee: The Babcock & Wilcox Company
    Inventor: Robert E. Chappell