Patents by Inventor Isabel B. Hovey

Isabel B. Hovey 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).

  • Backup position signaling in an elevator
    Patent number: 4627518
    Abstract: An elevator has a car position transducer that provides an output signal indicating car location. A car controller causes that signal to be stored in a memory. The controller compares the stored signal with a current transducer output and stores the current signal when the difference between the two exceeds a preset amount. A detector senses the elevator system power level and connects a backup power supply to the memory and the transducer when there is a power loss. A car motion detector senses the transducer output and removes the backup power from the transducer when the car stops moving.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: December 9, 1986
    Assignee: Otis Elevator Company
    Inventors: Gary M. Meguerdichian, Isabel B. Hovey