Patents by Inventor William J. Rihn

William J. Rihn 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).

  • Strong motion accelerograph with self-starter and electrical as well as light outputs
    Patent number: 4028659
    Abstract: An accelerograph for recording strong earthquake motion in three mutually perpendicular directions is disclosed. An electromagnetic starter is provided for use particularly with the accelerograph to initiate recording and to continue recording for an adjustable period of time of from 6 to 15 seconds after the last shock. The starter may comprise a single magnetically activated element which is disposed to respond to the first and subsequent P-waves, or it may comprise three such elements, one vertically oriented to respond to movements in the Z-axis, and two horizontally oriented to respond to movements in the X and Y-axes. Such starters may also be employed to open or shut off switches for any type of equipment or apparatus which should or should not be operating during an earthquake or immediately thereafter.
    Type: Grant
    Filed: July 5, 1974
    Date of Patent: June 7, 1977
    Assignee: Kinemetrics, Inc.
    Inventor: William J. Rihn