Patents by Inventor Debra A. Lewis

Debra A. Lewis 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).

  • Personal monitor and process for heat and work stress
    Patent number: 4883063
    Abstract: A personal monitor (10, 100, 200) for work and heat stress has a heart beat sensor (12) producing output electrical signals indicating a user's heart beats. A memory (127) stores heart beat information corresponding to the heart beat signals produced over predetermined time intervals. A microprocess (126) is connected to receive the heart beat information from the memory (127). The microprocessor (126) analyzes the heart beat information incrementally over the predetermined time intervals under program control to obtain a physiological demand during the predetermined time intervals and compares the obtained physiological demand against a stored physiological demand limit. Light emitting diodes (208) and a sound producing diaphragm (186) provide indications to the user when the stored physiological demand limit has been exceeded. The microprocessor (126) controls operation of the LEDs (208) and the diaphragm (186).
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: November 28, 1989
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Thomas E. Bernard, Gary W. Sherwin, William L. Kenney, Jr., Debra A. Lewis