Patents by Inventor David James Aron

David James Aron 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).

  • Patent number: 3983961
    Abstract: A floor-levelling transducer for controlling stopping of an elevator car at a landing, comprising two pairs of electromagnetic core units mounted on the car to generate a signal indicative of the position of the car with respect to the landing, and two metal plates in the shaft corresponding to each landing position and cooperable with the core units to produce said signal, each of the metal plates being flat and in separate parallel planes extending longitudinally of the shaft and having tapering portions pointing in a direction opposite to that of the other plate.
    Type: Grant
    Filed: September 27, 1973
    Date of Patent: October 5, 1976
    Assignee: Elevators Pty. Limited
    Inventor: David James Aron