Patents by Inventor Jerry W. Allen

Jerry W. Allen 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: 4321535
    Abstract: An apparatus for measuring dynamic magnetostriction subjects a test sample to a spatially uniform, sinusoidal magnetic field of constant peak amplitude. Accelerometers mounted on the test sample produce a first electrical signal representative of the acceleration of the test sample due to the induced magnetic field. The first electrical signal is integrated twice producing a signal representative of the displacement of the test sample due to the induced magnetic field. This signal is representative of the magnetostrictive movement of the test sample.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: March 23, 1982
    Assignee: Westinghouse Electric Corp.
    Inventor: Jerry W. Allen
  • Patent number: 4155425
    Abstract: A hydraulically operable elevator having a vertically reciprocable cab suspended from an overhead structure by differential hydraulic piston systems which are responsive to introduction of hydraulic fluid to decrease the overall length of the differential pistons causing the cab to ascend, and which are responsive to withdrawal of hydraulic fluid from the piston assemblies to increase the overall length of the differential pistons, allowing the cab to descend. Only one differential piston assembly is required on each side of the transverse axis of the cab to increase its stability and to provide maximum cross-sectional area for the interior of the cab.
    Type: Grant
    Filed: August 16, 1977
    Date of Patent: May 22, 1979
    Assignee: A. S. K. Elevator Service, Inc.
    Inventors: Jerry W. Allen, Herbert G. Cooper