Patents by Inventor Ronald W. Carlsten

Ronald W. Carlsten 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).

  • Integrated heat pipe and circuit board structure
    Patent number: 5283715
    Abstract: A heat pipe structure is incorporated directly into the metal baseplate of a circuit card thereby eliminating thermal contact resistance between the baseplate and the heat pipe assembly. Components are mounted on a copper circuit layer bonded to a dielectric layer in a first portion of the baseplate with a second portion of the baseplate/heat pipe assembly extending into a heat sink/cold plate condensing area for removal of heat generated in the component portion.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: February 1, 1994
    Assignee: International Business Machines, Inc.
    Inventors: Ronald W. Carlsten, Sung J. Kim, Alan L. Murphy
  • Sense circuit for detecting absence of a pulse train
    Patent number: 4845379
    Abstract: A low-cost circuit capable of detecting the absence of a pulse train such as the pulse train generated by a fan cooling output circuit of open collector design. The detection circuit is capable of sensing that a pulse output has stopped in either a high or low state by converting the pulse train to a level that can be compared to a reference. The circuit design insures that the steady state voltage level decays to an under voltage value when the pulse train stops regardless of whether the fan output stops in a high or low state.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: July 4, 1989
    Assignee: International Business Machines Corporation
    Inventor: Ronald W. Carlsten