Patents by Inventor Richard M. Spear

Richard M. Spear 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).

  • Elevator system
    Patent number: 4011928
    Abstract: An elevator system including a transmitter-receiver arrangement for detecting mechanical damage to the elevator system, such as might be caused by an earthquake. A transmitter carried by the counterweight provides a signal for a remotely located receiver, as long as the counterweight moves within its normal vertical path. Movement of the counterweight outside of this path terminates the transmitter signal and a control device operated by the receiver modifies the operation of the elevator system.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: March 15, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: Richard M. Spear, Lawrence P. Tosato