Patents by Inventor Robert M. Lumley

Robert M. Lumley 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).

  • Superconducting, fast rise-time voltage source
    Patent number: 4370568
    Abstract: A pulse generator comprises a toroid (11) of a superconducting material such as Niobium on a glass or ceramic substrate (12). A cryogenic source such as liquid helium cools the toroid to within a few degrees of absolute zero and a perpetually circulatory current is set up in the toroid. A laser beam is fired at the toroid to cause localized heating and the resultant current drop due to the material resistance causes an output pulse to be induced in an adjacent current winding (14).
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: January 25, 1983
    Assignee: Western Electric Company, Inc.
    Inventor: Robert M. Lumley
  • Digital computer having code conversion apparatus for an encrypted program
    Patent number: 4306289
    Abstract: The architecture of a conventional digital computer, for example, a microprocessor, is modified by interposing a multiplexer (31), a logic array (32) and a demultiplexer (33) between the instruction register (17) and instruction decoder (18). The logic array "scrambles" the bits in each instruction code; however, if the program to be run is priorly encrypted with this "scrambling" in mind, it will run normally. On the other hand, if the encrypted program is copied, the copied program will not run on an unmodified computer.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: December 15, 1981
    Assignee: Western Electric Company, Inc.
    Inventor: Robert M. Lumley