Patents by Inventor Jens D. Mehrens

Jens D. Mehrens 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).

  • Method for monitoring the performance of the head-disk-interface and device for preventing data losses due to magnetic head-disk-interferences
    Patent number: 4795981
    Abstract: A method and apparatus is described by which, in magnetic disk storage systems where a triboelectric current can be observed to flow between slider and disk surface, a saving signal can be generated by which a saving action can be initiated to save the data on the storage system before they are lost irreversibly. The triboelectric current is monitored and checked during start phase, and if certain values and conditions are not fulfilled, the saving action is initiatable by the TRIC signal, which is generated by an evaluation and analyzer circuit upon the occurrence of certain events such as the triboelectric current not reaching at least a predetermined threshold value during start phase, the triboelectric current becoming negative, or the triboelectric current reaching a non-zero value when the magnetic disk storage system reaches operational speed.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: January 3, 1989
    Assignee: International Business Machines Corporation
    Inventors: Friedrich Ertingshausen, Jens D. Mehrens