Patents by Inventor John A. Niblock

John A. Niblock 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).

  • Apparatus for controlling the transfer of interrupt signals in data processors
    Patent number: 4638432
    Abstract: To ensure security of interrupt input signals to a computer system (30-3N) with minimum interruption of the running of programs in the system, two interrupt logic units (1) receive interrupt signals on leads (20-2x) from connected apparatus and store flags representing the interrupt signals in an interrupt store (2). Control logic (3) compares each input signal with presettable criteria to determine if such signal is an interrupt signal and, if so, causes the data to be transferred by way of a read register (5) to the connected computer system (30-3N). At the same time the control logic (3) of one of the units (1) designated as the active unit also causes an ouput on a lead (11) to the other unit (1) designated as the standby unit.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: January 20, 1987
    Assignee: The General Electric Company, p.l.c.
    Inventors: John A. Niblock, Jayant Patel, Dennis Fisher, Anthony P. Lumb